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[Xen-devel] [PATCH v8 01/28] build: import Kbuild/Kconfig from Linux 4.3



Import the following files and directories from the Linux v4.3 tag /
commit id 6a13feb9c82803e2b815eca72fa7a9f5561d7861.

- scripts/kconfig -> xen/tools/kconfig
- Documentation/kbuild/kconfig{,-language}.txt ->
  docs/misc/kconfig{-language}.txt
- scripts/Makefile.host -> xen/tools/kconfig/Makefile.host

These files are currently unused but will be used shortly.

CC: Ian Campbell <ian.campbell@xxxxxxxxxx>
CC: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
CC: Jan Beulich <jbeulich@xxxxxxxx>
CC: Keir Fraser <keir@xxxxxxx>
CC: Tim Deegan <tim@xxxxxxx>
Signed-off-by: Doug Goldstein <cardoe@xxxxxxxxxx>
---
 docs/misc/kconfig-language.txt               |  395 ++++
 docs/misc/kconfig.txt                        |  237 +++
 xen/tools/kconfig/.gitignore                 |   22 +
 xen/tools/kconfig/Makefile                   |  317 ++++
 xen/tools/kconfig/Makefile.host              |  128 ++
 xen/tools/kconfig/POTFILES.in                |   12 +
 xen/tools/kconfig/check.sh                   |   13 +
 xen/tools/kconfig/conf.c                     |  722 +++++++
 xen/tools/kconfig/confdata.c                 | 1245 +++++++++++++
 xen/tools/kconfig/expr.c                     | 1206 ++++++++++++
 xen/tools/kconfig/expr.h                     |  238 +++
 xen/tools/kconfig/gconf.c                    | 1521 +++++++++++++++
 xen/tools/kconfig/gconf.glade                |  661 +++++++
 xen/tools/kconfig/images.c                   |  326 ++++
 xen/tools/kconfig/kxgettext.c                |  235 +++
 xen/tools/kconfig/list.h                     |  131 ++
 xen/tools/kconfig/lkc.h                      |  186 ++
 xen/tools/kconfig/lkc_proto.h                |   52 +
 xen/tools/kconfig/lxdialog/.gitignore        |    4 +
 xen/tools/kconfig/lxdialog/BIG.FAT.WARNING   |    4 +
 xen/tools/kconfig/lxdialog/check-lxdialog.sh |   91 +
 xen/tools/kconfig/lxdialog/checklist.c       |  332 ++++
 xen/tools/kconfig/lxdialog/dialog.h          |  257 +++
 xen/tools/kconfig/lxdialog/inputbox.c        |  301 +++
 xen/tools/kconfig/lxdialog/menubox.c         |  437 +++++
 xen/tools/kconfig/lxdialog/textbox.c         |  408 ++++
 xen/tools/kconfig/lxdialog/util.c            |  713 +++++++
 xen/tools/kconfig/lxdialog/yesno.c           |  114 ++
 xen/tools/kconfig/mconf.c                    | 1047 +++++++++++
 xen/tools/kconfig/menu.c                     |  697 +++++++
 xen/tools/kconfig/merge_config.sh            |  162 ++
 xen/tools/kconfig/nconf.c                    | 1561 ++++++++++++++++
 xen/tools/kconfig/nconf.gui.c                |  656 +++++++
 xen/tools/kconfig/nconf.h                    |   96 +
 xen/tools/kconfig/qconf.cc                   | 1798 ++++++++++++++++++
 xen/tools/kconfig/qconf.h                    |  338 ++++
 xen/tools/kconfig/streamline_config.pl       |  647 +++++++
 xen/tools/kconfig/symbol.c                   | 1376 ++++++++++++++
 xen/tools/kconfig/util.c                     |  147 ++
 xen/tools/kconfig/zconf.gperf                |   49 +
 xen/tools/kconfig/zconf.hash.c_shipped       |  293 +++
 xen/tools/kconfig/zconf.l                    |  374 ++++
 xen/tools/kconfig/zconf.lex.c_shipped        | 2473 ++++++++++++++++++++++++
 xen/tools/kconfig/zconf.tab.c_shipped        | 2580 ++++++++++++++++++++++++++
 xen/tools/kconfig/zconf.y                    |  742 ++++++++
 45 files changed, 25344 insertions(+)
 create mode 100644 docs/misc/kconfig-language.txt
 create mode 100644 docs/misc/kconfig.txt
 create mode 100644 xen/tools/kconfig/.gitignore
 create mode 100644 xen/tools/kconfig/Makefile
 create mode 100644 xen/tools/kconfig/Makefile.host
 create mode 100644 xen/tools/kconfig/POTFILES.in
 create mode 100755 xen/tools/kconfig/check.sh
 create mode 100644 xen/tools/kconfig/conf.c
 create mode 100644 xen/tools/kconfig/confdata.c
 create mode 100644 xen/tools/kconfig/expr.c
 create mode 100644 xen/tools/kconfig/expr.h
 create mode 100644 xen/tools/kconfig/gconf.c
 create mode 100644 xen/tools/kconfig/gconf.glade
 create mode 100644 xen/tools/kconfig/images.c
 create mode 100644 xen/tools/kconfig/kxgettext.c
 create mode 100644 xen/tools/kconfig/list.h
 create mode 100644 xen/tools/kconfig/lkc.h
 create mode 100644 xen/tools/kconfig/lkc_proto.h
 create mode 100644 xen/tools/kconfig/lxdialog/.gitignore
 create mode 100644 xen/tools/kconfig/lxdialog/BIG.FAT.WARNING
 create mode 100755 xen/tools/kconfig/lxdialog/check-lxdialog.sh
 create mode 100644 xen/tools/kconfig/lxdialog/checklist.c
 create mode 100644 xen/tools/kconfig/lxdialog/dialog.h
 create mode 100644 xen/tools/kconfig/lxdialog/inputbox.c
 create mode 100644 xen/tools/kconfig/lxdialog/menubox.c
 create mode 100644 xen/tools/kconfig/lxdialog/textbox.c
 create mode 100644 xen/tools/kconfig/lxdialog/util.c
 create mode 100644 xen/tools/kconfig/lxdialog/yesno.c
 create mode 100644 xen/tools/kconfig/mconf.c
 create mode 100644 xen/tools/kconfig/menu.c
 create mode 100755 xen/tools/kconfig/merge_config.sh
 create mode 100644 xen/tools/kconfig/nconf.c
 create mode 100644 xen/tools/kconfig/nconf.gui.c
 create mode 100644 xen/tools/kconfig/nconf.h
 create mode 100644 xen/tools/kconfig/qconf.cc
 create mode 100644 xen/tools/kconfig/qconf.h
 create mode 100755 xen/tools/kconfig/streamline_config.pl
 create mode 100644 xen/tools/kconfig/symbol.c
 create mode 100644 xen/tools/kconfig/util.c
 create mode 100644 xen/tools/kconfig/zconf.gperf
 create mode 100644 xen/tools/kconfig/zconf.hash.c_shipped
 create mode 100644 xen/tools/kconfig/zconf.l
 create mode 100644 xen/tools/kconfig/zconf.lex.c_shipped
 create mode 100644 xen/tools/kconfig/zconf.tab.c_shipped
 create mode 100644 xen/tools/kconfig/zconf.y

diff --git a/docs/misc/kconfig-language.txt b/docs/misc/kconfig-language.txt
new file mode 100644
index 0000000..350f733
--- /dev/null
+++ b/docs/misc/kconfig-language.txt
@@ -0,0 +1,395 @@
+Introduction
+------------
+
+The configuration database is a collection of configuration options
+organized in a tree structure:
+
+       +- Code maturity level options
+       |  +- Prompt for development and/or incomplete code/drivers
+       +- General setup
+       |  +- Networking support
+       |  +- System V IPC
+       |  +- BSD Process Accounting
+       |  +- Sysctl support
+       +- Loadable module support
+       |  +- Enable loadable module support
+       |     +- Set version information on all module symbols
+       |     +- Kernel module loader
+       +- ...
+
+Every entry has its own dependencies. These dependencies are used
+to determine the visibility of an entry. Any child entry is only
+visible if its parent entry is also visible.
+
+Menu entries
+------------
+
+Most entries define a config option; all other entries help to organize
+them. A single configuration option is defined like this:
+
+config MODVERSIONS
+       bool "Set version information on all module symbols"
+       depends on MODULES
+       help
+         Usually, modules have to be recompiled whenever you switch to a new
+         kernel.  ...
+
+Every line starts with a key word and can be followed by multiple
+arguments.  "config" starts a new config entry. The following lines
+define attributes for this config option. Attributes can be the type of
+the config option, input prompt, dependencies, help text and default
+values. A config option can be defined multiple times with the same
+name, but every definition can have only a single input prompt and the
+type must not conflict.
+
+Menu attributes
+---------------
+
+A menu entry can have a number of attributes. Not all of them are
+applicable everywhere (see syntax).
+
+- type definition: "bool"/"tristate"/"string"/"hex"/"int"
+  Every config option must have a type. There are only two basic types:
+  tristate and string; the other types are based on these two. The type
+  definition optionally accepts an input prompt, so these two examples
+  are equivalent:
+
+       bool "Networking support"
+  and
+       bool
+       prompt "Networking support"
+
+- input prompt: "prompt" <prompt> ["if" <expr>]
+  Every menu entry can have at most one prompt, which is used to display
+  to the user. Optionally dependencies only for this prompt can be added
+  with "if".
+
+- default value: "default" <expr> ["if" <expr>]
+  A config option can have any number of default values. If multiple
+  default values are visible, only the first defined one is active.
+  Default values are not limited to the menu entry where they are
+  defined. This means the default can be defined somewhere else or be
+  overridden by an earlier definition.
+  The default value is only assigned to the config symbol if no other
+  value was set by the user (via the input prompt above). If an input
+  prompt is visible the default value is presented to the user and can
+  be overridden by him.
+  Optionally, dependencies only for this default value can be added with
+  "if".
+
+- type definition + default value:
+       "def_bool"/"def_tristate" <expr> ["if" <expr>]
+  This is a shorthand notation for a type definition plus a value.
+  Optionally dependencies for this default value can be added with "if".
+
+- dependencies: "depends on" <expr>
+  This defines a dependency for this menu entry. If multiple
+  dependencies are defined, they are connected with '&&'. Dependencies
+  are applied to all other options within this menu entry (which also
+  accept an "if" expression), so these two examples are equivalent:
+
+       bool "foo" if BAR
+       default y if BAR
+  and
+       depends on BAR
+       bool "foo"
+       default y
+
+- reverse dependencies: "select" <symbol> ["if" <expr>]
+  While normal dependencies reduce the upper limit of a symbol (see
+  below), reverse dependencies can be used to force a lower limit of
+  another symbol. The value of the current menu symbol is used as the
+  minimal value <symbol> can be set to. If <symbol> is selected multiple
+  times, the limit is set to the largest selection.
+  Reverse dependencies can only be used with boolean or tristate
+  symbols.
+  Note:
+       select should be used with care. select will force
+       a symbol to a value without visiting the dependencies.
+       By abusing select you are able to select a symbol FOO even
+       if FOO depends on BAR that is not set.
+       In general use select only for non-visible symbols
+       (no prompts anywhere) and for symbols with no dependencies.
+       That will limit the usefulness but on the other hand avoid
+       the illegal configurations all over.
+
+- limiting menu display: "visible if" <expr>
+  This attribute is only applicable to menu blocks, if the condition is
+  false, the menu block is not displayed to the user (the symbols
+  contained there can still be selected by other symbols, though). It is
+  similar to a conditional "prompt" attribute for individual menu
+  entries. Default value of "visible" is true.
+
+- numerical ranges: "range" <symbol> <symbol> ["if" <expr>]
+  This allows to limit the range of possible input values for int
+  and hex symbols. The user can only input a value which is larger than
+  or equal to the first symbol and smaller than or equal to the second
+  symbol.
+
+- help text: "help" or "---help---"
+  This defines a help text. The end of the help text is determined by
+  the indentation level, this means it ends at the first line which has
+  a smaller indentation than the first line of the help text.
+  "---help---" and "help" do not differ in behaviour, "---help---" is
+  used to help visually separate configuration logic from help within
+  the file as an aid to developers.
+
+- misc options: "option" <symbol>[=<value>]
+  Various less common options can be defined via this option syntax,
+  which can modify the behaviour of the menu entry and its config
+  symbol. These options are currently possible:
+
+  - "defconfig_list"
+    This declares a list of default entries which can be used when
+    looking for the default configuration (which is used when the main
+    .config doesn't exists yet.)
+
+  - "modules"
+    This declares the symbol to be used as the MODULES symbol, which
+    enables the third modular state for all config symbols.
+    At most one symbol may have the "modules" option set.
+
+  - "env"=<value>
+    This imports the environment variable into Kconfig. It behaves like
+    a default, except that the value comes from the environment, this
+    also means that the behaviour when mixing it with normal defaults is
+    undefined at this point. The symbol is currently not exported back
+    to the build environment (if this is desired, it can be done via
+    another symbol).
+
+  - "allnoconfig_y"
+    This declares the symbol as one that should have the value y when
+    using "allnoconfig". Used for symbols that hide other symbols.
+
+Menu dependencies
+-----------------
+
+Dependencies define the visibility of a menu entry and can also reduce
+the input range of tristate symbols. The tristate logic used in the
+expressions uses one more state than normal boolean logic to express the
+module state. Dependency expressions have the following syntax:
+
+<expr> ::= <symbol>                             (1)
+           <symbol> '=' <symbol>                (2)
+           <symbol> '!=' <symbol>               (3)
+           '(' <expr> ')'                       (4)
+           '!' <expr>                           (5)
+           <expr> '&&' <expr>                   (6)
+           <expr> '||' <expr>                   (7)
+
+Expressions are listed in decreasing order of precedence. 
+
+(1) Convert the symbol into an expression. Boolean and tristate symbols
+    are simply converted into the respective expression values. All
+    other symbol types result in 'n'.
+(2) If the values of both symbols are equal, it returns 'y',
+    otherwise 'n'.
+(3) If the values of both symbols are equal, it returns 'n',
+    otherwise 'y'.
+(4) Returns the value of the expression. Used to override precedence.
+(5) Returns the result of (2-/expr/).
+(6) Returns the result of min(/expr/, /expr/).
+(7) Returns the result of max(/expr/, /expr/).
+
+An expression can have a value of 'n', 'm' or 'y' (or 0, 1, 2
+respectively for calculations). A menu entry becomes visible when its
+expression evaluates to 'm' or 'y'.
+
+There are two types of symbols: constant and non-constant symbols.
+Non-constant symbols are the most common ones and are defined with the
+'config' statement. Non-constant symbols consist entirely of alphanumeric
+characters or underscores.
+Constant symbols are only part of expressions. Constant symbols are
+always surrounded by single or double quotes. Within the quote, any
+other character is allowed and the quotes can be escaped using '\'.
+
+Menu structure
+--------------
+
+The position of a menu entry in the tree is determined in two ways. First
+it can be specified explicitly:
+
+menu "Network device support"
+       depends on NET
+
+config NETDEVICES
+       ...
+
+endmenu
+
+All entries within the "menu" ... "endmenu" block become a submenu of
+"Network device support". All subentries inherit the dependencies from
+the menu entry, e.g. this means the dependency "NET" is added to the
+dependency list of the config option NETDEVICES.
+
+The other way to generate the menu structure is done by analyzing the
+dependencies. If a menu entry somehow depends on the previous entry, it
+can be made a submenu of it. First, the previous (parent) symbol must
+be part of the dependency list and then one of these two conditions
+must be true:
+- the child entry must become invisible, if the parent is set to 'n'
+- the child entry must only be visible, if the parent is visible
+
+config MODULES
+       bool "Enable loadable module support"
+
+config MODVERSIONS
+       bool "Set version information on all module symbols"
+       depends on MODULES
+
+comment "module support disabled"
+       depends on !MODULES
+
+MODVERSIONS directly depends on MODULES, this means it's only visible if
+MODULES is different from 'n'. The comment on the other hand is always
+visible when MODULES is visible (the (empty) dependency of MODULES is
+also part of the comment dependencies).
+
+
+Kconfig syntax
+--------------
+
+The configuration file describes a series of menu entries, where every
+line starts with a keyword (except help texts). The following keywords
+end a menu entry:
+- config
+- menuconfig
+- choice/endchoice
+- comment
+- menu/endmenu
+- if/endif
+- source
+The first five also start the definition of a menu entry.
+
+config:
+
+       "config" <symbol>
+       <config options>
+
+This defines a config symbol <symbol> and accepts any of above
+attributes as options.
+
+menuconfig:
+       "menuconfig" <symbol>
+       <config options>
+
+This is similar to the simple config entry above, but it also gives a
+hint to front ends, that all suboptions should be displayed as a
+separate list of options.
+
+choices:
+
+       "choice" [symbol]
+       <choice options>
+       <choice block>
+       "endchoice"
+
+This defines a choice group and accepts any of the above attributes as
+options. A choice can only be of type bool or tristate, while a boolean
+choice only allows a single config entry to be selected, a tristate
+choice also allows any number of config entries to be set to 'm'. This
+can be used if multiple drivers for a single hardware exists and only a
+single driver can be compiled/loaded into the kernel, but all drivers
+can be compiled as modules.
+A choice accepts another option "optional", which allows to set the
+choice to 'n' and no entry needs to be selected.
+If no [symbol] is associated with a choice, then you can not have multiple
+definitions of that choice. If a [symbol] is associated to the choice,
+then you may define the same choice (ie. with the same entries) in another
+place.
+
+comment:
+
+       "comment" <prompt>
+       <comment options>
+
+This defines a comment which is displayed to the user during the
+configuration process and is also echoed to the output files. The only
+possible options are dependencies.
+
+menu:
+
+       "menu" <prompt>
+       <menu options>
+       <menu block>
+       "endmenu"
+
+This defines a menu block, see "Menu structure" above for more
+information. The only possible options are dependencies and "visible"
+attributes.
+
+if:
+
+       "if" <expr>
+       <if block>
+       "endif"
+
+This defines an if block. The dependency expression <expr> is appended
+to all enclosed menu entries.
+
+source:
+
+       "source" <prompt>
+
+This reads the specified configuration file. This file is always parsed.
+
+mainmenu:
+
+       "mainmenu" <prompt>
+
+This sets the config program's title bar if the config program chooses
+to use it. It should be placed at the top of the configuration, before any
+other statement.
+
+
+Kconfig hints
+-------------
+This is a collection of Kconfig tips, most of which aren't obvious at
+first glance and most of which have become idioms in several Kconfig
+files.
+
+Adding common features and make the usage configurable
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+It is a common idiom to implement a feature/functionality that are
+relevant for some architectures but not all.
+The recommended way to do so is to use a config variable named HAVE_*
+that is defined in a common Kconfig file and selected by the relevant
+architectures.
+An example is the generic IOMAP functionality.
+
+We would in lib/Kconfig see:
+
+# Generic IOMAP is used to ...
+config HAVE_GENERIC_IOMAP
+
+config GENERIC_IOMAP
+       depends on HAVE_GENERIC_IOMAP && FOO
+
+And in lib/Makefile we would see:
+obj-$(CONFIG_GENERIC_IOMAP) += iomap.o
+
+For each architecture using the generic IOMAP functionality we would see:
+
+config X86
+       select ...
+       select HAVE_GENERIC_IOMAP
+       select ...
+
+Note: we use the existing config option and avoid creating a new
+config variable to select HAVE_GENERIC_IOMAP.
+
+Note: the use of the internal config variable HAVE_GENERIC_IOMAP, it is
+introduced to overcome the limitation of select which will force a
+config option to 'y' no matter the dependencies.
+The dependencies are moved to the symbol GENERIC_IOMAP and we avoid the
+situation where select forces a symbol equals to 'y'.
+
+Build as module only
+~~~~~~~~~~~~~~~~~~~~
+To restrict a component build to module-only, qualify its config symbol
+with "depends on m".  E.g.:
+
+config FOO
+       depends on BAR && m
+
+limits FOO to module (=m) or disabled (=n).
diff --git a/docs/misc/kconfig.txt b/docs/misc/kconfig.txt
new file mode 100644
index 0000000..bbc99c0
--- /dev/null
+++ b/docs/misc/kconfig.txt
@@ -0,0 +1,237 @@
+This file contains some assistance for using "make *config".
+
+Use "make help" to list all of the possible configuration targets.
+
+The xconfig ('qconf') and menuconfig ('mconf') programs also
+have embedded help text.  Be sure to check it for navigation,
+search, and other general help text.
+
+======================================================================
+General
+--------------------------------------------------
+
+New kernel releases often introduce new config symbols.  Often more
+important, new kernel releases may rename config symbols.  When
+this happens, using a previously working .config file and running
+"make oldconfig" won't necessarily produce a working new kernel
+for you, so you may find that you need to see what NEW kernel
+symbols have been introduced.
+
+To see a list of new config symbols when using "make oldconfig", use
+
+       cp user/some/old.config .config
+       make listnewconfig
+
+and the config program will list any new symbols, one per line.
+
+       scripts/diffconfig .config.old .config | less
+
+______________________________________________________________________
+Environment variables for '*config'
+
+KCONFIG_CONFIG
+--------------------------------------------------
+This environment variable can be used to specify a default kernel config
+file name to override the default name of ".config".
+
+KCONFIG_OVERWRITECONFIG
+--------------------------------------------------
+If you set KCONFIG_OVERWRITECONFIG in the environment, Kconfig will not
+break symlinks when .config is a symlink to somewhere else.
+
+CONFIG_
+--------------------------------------------------
+If you set CONFIG_ in the environment, Kconfig will prefix all symbols
+with its value when saving the configuration, instead of using the default,
+"CONFIG_".
+
+______________________________________________________________________
+Environment variables for '{allyes/allmod/allno/rand}config'
+
+KCONFIG_ALLCONFIG
+--------------------------------------------------
+(partially based on lkml email from/by Rob Landley, re: miniconfig)
+--------------------------------------------------
+The allyesconfig/allmodconfig/allnoconfig/randconfig variants can also
+use the environment variable KCONFIG_ALLCONFIG as a flag or a filename
+that contains config symbols that the user requires to be set to a
+specific value.  If KCONFIG_ALLCONFIG is used without a filename where
+KCONFIG_ALLCONFIG == "" or KCONFIG_ALLCONFIG == "1", "make *config"
+checks for a file named "all{yes/mod/no/def/random}.config"
+(corresponding to the *config command that was used) for symbol values
+that are to be forced.  If this file is not found, it checks for a
+file named "all.config" to contain forced values.
+
+This enables you to create "miniature" config (miniconfig) or custom
+config files containing just the config symbols that you are interested
+in.  Then the kernel config system generates the full .config file,
+including symbols of your miniconfig file.
+
+This 'KCONFIG_ALLCONFIG' file is a config file which contains
+(usually a subset of all) preset config symbols.  These variable
+settings are still subject to normal dependency checks.
+
+Examples:
+       KCONFIG_ALLCONFIG=custom-notebook.config make allnoconfig
+or
+       KCONFIG_ALLCONFIG=mini.config make allnoconfig
+or
+       make KCONFIG_ALLCONFIG=mini.config allnoconfig
+
+These examples will disable most options (allnoconfig) but enable or
+disable the options that are explicitly listed in the specified
+mini-config files.
+
+______________________________________________________________________
+Environment variables for 'randconfig'
+
+KCONFIG_SEED
+--------------------------------------------------
+You can set this to the integer value used to seed the RNG, if you want
+to somehow debug the behaviour of the kconfig parser/frontends.
+If not set, the current time will be used.
+
+KCONFIG_PROBABILITY
+--------------------------------------------------
+This variable can be used to skew the probabilities. This variable can
+be unset or empty, or set to three different formats:
+       KCONFIG_PROBABILITY     y:n split           y:m:n split
+       -----------------------------------------------------------------
+       unset or empty          50  : 50            33  : 33  : 34
+       N                        N  : 100-N         N/2 : N/2 : 100-N
+    [1] N:M                     N+M : 100-(N+M)      N  :  M  : 100-(N+M)
+    [2] N:M:L                    N  : 100-N          M  :  L  : 100-(M+L)
+
+where N, M and L are integers (in base 10) in the range [0,100], and so
+that:
+    [1] N+M is in the range [0,100]
+    [2] M+L is in the range [0,100]
+
+Examples:
+       KCONFIG_PROBABILITY=10
+               10% of booleans will be set to 'y', 90% to 'n'
+               5% of tristates will be set to 'y', 5% to 'm', 90% to 'n'
+       KCONFIG_PROBABILITY=15:25
+               40% of booleans will be set to 'y', 60% to 'n'
+               15% of tristates will be set to 'y', 25% to 'm', 60% to 'n'
+       KCONFIG_PROBABILITY=10:15:15
+               10% of booleans will be set to 'y', 90% to 'n'
+               15% of tristates will be set to 'y', 15% to 'm', 70% to 'n'
+
+______________________________________________________________________
+Environment variables for 'silentoldconfig'
+
+KCONFIG_NOSILENTUPDATE
+--------------------------------------------------
+If this variable has a non-blank value, it prevents silent kernel
+config updates (requires explicit updates).
+
+KCONFIG_AUTOCONFIG
+--------------------------------------------------
+This environment variable can be set to specify the path & name of the
+"auto.conf" file.  Its default value is "include/config/auto.conf".
+
+KCONFIG_TRISTATE
+--------------------------------------------------
+This environment variable can be set to specify the path & name of the
+"tristate.conf" file.  Its default value is "include/config/tristate.conf".
+
+KCONFIG_AUTOHEADER
+--------------------------------------------------
+This environment variable can be set to specify the path & name of the
+"autoconf.h" (header) file.
+Its default value is "include/generated/autoconf.h".
+
+
+======================================================================
+menuconfig
+--------------------------------------------------
+
+SEARCHING for CONFIG symbols
+
+Searching in menuconfig:
+
+       The Search function searches for kernel configuration symbol
+       names, so you have to know something close to what you are
+       looking for.
+
+       Example:
+               /hotplug
+               This lists all config symbols that contain "hotplug",
+               e.g., HOTPLUG_CPU, MEMORY_HOTPLUG.
+
+       For search help, enter / followed TAB-TAB-TAB (to highlight
+       <Help>) and Enter.  This will tell you that you can also use
+       regular expressions (regexes) in the search string, so if you
+       are not interested in MEMORY_HOTPLUG, you could try
+
+               /^hotplug
+
+       When searching, symbols are sorted thus:
+         - first, exact matches, sorted alphabetically (an exact match
+           is when the search matches the complete symbol name);
+         - then, other matches, sorted alphabetically.
+       For example: ^ATH.K matches:
+           ATH5K ATH9K ATH5K_AHB ATH5K_DEBUG [...] ATH6KL ATH6KL_DEBUG
+           [...] ATH9K_AHB ATH9K_BTCOEX_SUPPORT ATH9K_COMMON [...]
+       of which only ATH5K and ATH9K match exactly and so are sorted
+       first (and in alphabetical order), then come all other symbols,
+       sorted in alphabetical order.
+
+______________________________________________________________________
+User interface options for 'menuconfig'
+
+MENUCONFIG_COLOR
+--------------------------------------------------
+It is possible to select different color themes using the variable
+MENUCONFIG_COLOR.  To select a theme use:
+
+       make MENUCONFIG_COLOR=<theme> menuconfig
+
+Available themes are:
+  mono       => selects colors suitable for monochrome displays
+  blackbg    => selects a color scheme with black background
+  classic    => theme with blue background. The classic look
+  bluetitle  => a LCD friendly version of classic. (default)
+
+MENUCONFIG_MODE
+--------------------------------------------------
+This mode shows all sub-menus in one large tree.
+
+Example:
+       make MENUCONFIG_MODE=single_menu menuconfig
+
+
+======================================================================
+xconfig
+--------------------------------------------------
+
+Searching in xconfig:
+
+       The Search function searches for kernel configuration symbol
+       names, so you have to know something close to what you are
+       looking for.
+
+       Example:
+               Ctrl-F hotplug
+       or
+               Menu: File, Search, hotplug
+
+       lists all config symbol entries that contain "hotplug" in
+       the symbol name.  In this Search dialog, you may change the
+       config setting for any of the entries that are not grayed out.
+       You can also enter a different search string without having
+       to return to the main menu.
+
+
+======================================================================
+gconfig
+--------------------------------------------------
+
+Searching in gconfig:
+
+       None (gconfig isn't maintained as well as xconfig or menuconfig);
+       however, gconfig does have a few more viewing choices than
+       xconfig does.
+
+###
diff --git a/xen/tools/kconfig/.gitignore b/xen/tools/kconfig/.gitignore
new file mode 100644
index 0000000..be603c4
--- /dev/null
+++ b/xen/tools/kconfig/.gitignore
@@ -0,0 +1,22 @@
+#
+# Generated files
+#
+config*
+*.lex.c
+*.tab.c
+*.tab.h
+zconf.hash.c
+*.moc
+gconf.glade.h
+*.pot
+*.mo
+
+#
+# configuration programs
+#
+conf
+mconf
+nconf
+qconf
+gconf
+kxgettext
diff --git a/xen/tools/kconfig/Makefile b/xen/tools/kconfig/Makefile
new file mode 100644
index 0000000..aceaaed
--- /dev/null
+++ b/xen/tools/kconfig/Makefile
@@ -0,0 +1,317 @@
+# ===========================================================================
+# Kernel configuration targets
+# These targets are used from top-level makefile
+
+PHONY += xconfig gconfig menuconfig config silentoldconfig update-po-config \
+       localmodconfig localyesconfig
+
+ifdef KBUILD_KCONFIG
+Kconfig := $(KBUILD_KCONFIG)
+else
+Kconfig := Kconfig
+endif
+
+ifeq ($(quiet),silent_)
+silent := -s
+endif
+
+# We need this, in case the user has it in its environment
+unexport CONFIG_
+
+xconfig: $(obj)/qconf
+       $< $(silent) $(Kconfig)
+
+gconfig: $(obj)/gconf
+       $< $(silent) $(Kconfig)
+
+menuconfig: $(obj)/mconf
+       $< $(silent) $(Kconfig)
+
+config: $(obj)/conf
+       $< $(silent) --oldaskconfig $(Kconfig)
+
+nconfig: $(obj)/nconf
+       $< $(silent) $(Kconfig)
+
+silentoldconfig: $(obj)/conf
+       $(Q)mkdir -p include/config include/generated
+       $< $(silent) --$@ $(Kconfig)
+
+localyesconfig localmodconfig: $(obj)/streamline_config.pl $(obj)/conf
+       $(Q)mkdir -p include/config include/generated
+       $(Q)perl $< --$@ $(srctree) $(Kconfig) > .tmp.config
+       $(Q)if [ -f .config ]; then                                     \
+                       cmp -s .tmp.config .config ||                   \
+                       (mv -f .config .config.old.1;                   \
+                        mv -f .tmp.config .config;                     \
+                        $(obj)/conf $(silent) --silentoldconfig $(Kconfig); \
+                        mv -f .config.old.1 .config.old)               \
+       else                                                            \
+                       mv -f .tmp.config .config;                      \
+                       $(obj)/conf $(silent) --silentoldconfig $(Kconfig); \
+       fi
+       $(Q)rm -f .tmp.config
+
+# Create new linux.pot file
+# Adjust charset to UTF-8 in .po file to accept UTF-8 in Kconfig files
+update-po-config: $(obj)/kxgettext $(obj)/gconf.glade.h
+       $(Q)$(kecho) "  GEN     config.pot"
+       $(Q)xgettext --default-domain=linux                         \
+           --add-comments --keyword=_ --keyword=N_                 \
+           --from-code=UTF-8                                       \
+           --files-from=$(srctree)/scripts/kconfig/POTFILES.in     \
+           --directory=$(srctree) --directory=$(objtree)           \
+           --output $(obj)/config.pot
+       $(Q)sed -i s/CHARSET/UTF-8/ $(obj)/config.pot
+       $(Q)(for i in `ls $(srctree)/arch/*/Kconfig      \
+           $(srctree)/arch/*/um/Kconfig`;               \
+           do                                           \
+               $(kecho) "  GEN     $$i";                    \
+               $(obj)/kxgettext $$i                     \
+                    >> $(obj)/config.pot;               \
+           done )
+       $(Q)$(kecho) "  GEN     linux.pot"
+       $(Q)msguniq --sort-by-file --to-code=UTF-8 $(obj)/config.pot \
+           --output $(obj)/linux.pot
+       $(Q)rm -f $(obj)/config.pot
+
+# These targets map 1:1 to the commandline options of 'conf'
+simple-targets := oldconfig allnoconfig allyesconfig allmodconfig \
+       alldefconfig randconfig listnewconfig olddefconfig
+PHONY += $(simple-targets)
+
+$(simple-targets): $(obj)/conf
+       $< $(silent) --$@ $(Kconfig)
+
+PHONY += oldnoconfig savedefconfig defconfig
+
+# oldnoconfig is an alias of olddefconfig, because people already are dependent
+# on its behavior (sets new symbols to their default value but not 'n') with 
the
+# counter-intuitive name.
+oldnoconfig: olddefconfig
+
+savedefconfig: $(obj)/conf
+       $< $(silent) --$@=defconfig $(Kconfig)
+
+defconfig: $(obj)/conf
+ifeq ($(KBUILD_DEFCONFIG),)
+       $< $(silent) --defconfig $(Kconfig)
+else
+       @$(kecho) "*** Default configuration is based on '$(KBUILD_DEFCONFIG)'"
+       $(Q)$< $(silent) 
--defconfig=arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG) $(Kconfig)
+endif
+
+%_defconfig: $(obj)/conf
+       $(Q)$< $(silent) --defconfig=arch/$(SRCARCH)/configs/$@ $(Kconfig)
+
+configfiles=$(wildcard $(srctree)/kernel/configs/$@ 
$(srctree)/arch/$(SRCARCH)/configs/$@)
+
+%.config: $(obj)/conf
+       $(if $(call configfiles),, $(error No configuration exists for this 
target on this architecture))
+       $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh -m 
.config $(configfiles)
+       +$(Q)yes "" | $(MAKE) -f $(srctree)/Makefile oldconfig
+
+PHONY += kvmconfig
+kvmconfig: kvm_guest.config
+       @:
+
+PHONY += xenconfig
+xenconfig: xen.config
+       @:
+
+PHONY += tinyconfig
+tinyconfig:
+       $(Q)$(MAKE) -f $(srctree)/Makefile allnoconfig tiny.config
+
+# Help text used by make help
+help:
+       @echo  '  config          - Update current config utilising a 
line-oriented program'
+       @echo  '  nconfig         - Update current config utilising a ncurses 
menu based'
+       @echo  '                    program'
+       @echo  '  menuconfig      - Update current config utilising a menu 
based program'
+       @echo  '  xconfig         - Update current config utilising a Qt based 
front-end'
+       @echo  '  gconfig         - Update current config utilising a GTK+ 
based front-end'
+       @echo  '  oldconfig       - Update current config utilising a provided 
.config as base'
+       @echo  '  localmodconfig  - Update current config disabling modules not 
loaded'
+       @echo  '  localyesconfig  - Update current config converting local mods 
to core'
+       @echo  '  silentoldconfig - Same as oldconfig, but quietly, 
additionally update deps'
+       @echo  '  defconfig       - New config with default from ARCH supplied 
defconfig'
+       @echo  '  savedefconfig   - Save current config as ./defconfig (minimal 
config)'
+       @echo  '  allnoconfig     - New config where all options are answered 
with no'
+       @echo  '  allyesconfig    - New config where all options are accepted 
with yes'
+       @echo  '  allmodconfig    - New config selecting modules when possible'
+       @echo  '  alldefconfig    - New config with all symbols set to default'
+       @echo  '  randconfig      - New config with random answer to all 
options'
+       @echo  '  listnewconfig   - List new options'
+       @echo  '  olddefconfig    - Same as silentoldconfig but sets new 
symbols to their'
+       @echo  '                    default value'
+       @echo  '  kvmconfig       - Enable additional options for kvm guest 
kernel support'
+       @echo  '  xenconfig       - Enable additional options for xen dom0 and 
guest kernel support'
+       @echo  '  tinyconfig      - Configure the tiniest possible kernel'
+
+# lxdialog stuff
+check-lxdialog  := $(srctree)/$(src)/lxdialog/check-lxdialog.sh
+
+# Use recursively expanded variables so we do not call gcc unless
+# we really need to do so. (Do not call gcc as part of make mrproper)
+HOST_EXTRACFLAGS += $(shell $(CONFIG_SHELL) $(check-lxdialog) -ccflags) \
+                    -DLOCALE
+
+# ===========================================================================
+# Shared Makefile for the various kconfig executables:
+# conf:          Used for defconfig, oldconfig and related targets
+# nconf:  Used for the nconfig target.
+#         Utilizes ncurses
+# mconf:  Used for the menuconfig target
+#         Utilizes the lxdialog package
+# qconf:  Used for the xconfig target
+#         Based on Qt which needs to be installed to compile it
+# gconf:  Used for the gconfig target
+#         Based on GTK+ which needs to be installed to compile it
+# object files used by all kconfig flavours
+
+lxdialog := lxdialog/checklist.o lxdialog/util.o lxdialog/inputbox.o
+lxdialog += lxdialog/textbox.o lxdialog/yesno.o lxdialog/menubox.o
+
+conf-objs      := conf.o  zconf.tab.o
+mconf-objs     := mconf.o zconf.tab.o $(lxdialog)
+nconf-objs     := nconf.o zconf.tab.o nconf.gui.o
+kxgettext-objs := kxgettext.o zconf.tab.o
+qconf-cxxobjs  := qconf.o
+qconf-objs     := zconf.tab.o
+gconf-objs     := gconf.o zconf.tab.o
+
+hostprogs-y := conf nconf mconf kxgettext qconf gconf
+
+clean-files    := qconf.moc .tmp_qtcheck .tmp_gtkcheck
+clean-files    += zconf.tab.c zconf.lex.c zconf.hash.c gconf.glade.h
+clean-files     += config.pot linux.pot
+
+# Check that we have the required ncurses stuff installed for lxdialog 
(menuconfig)
+PHONY += $(obj)/dochecklxdialog
+$(addprefix $(obj)/,$(lxdialog)): $(obj)/dochecklxdialog
+$(obj)/dochecklxdialog:
+       $(Q)$(CONFIG_SHELL) $(check-lxdialog) -check $(HOSTCC) 
$(HOST_EXTRACFLAGS) $(HOSTLOADLIBES_mconf)
+
+always := dochecklxdialog
+
+# Add environment specific flags
+HOST_EXTRACFLAGS += $(shell $(CONFIG_SHELL) $(srctree)/$(src)/check.sh 
$(HOSTCC) $(HOSTCFLAGS))
+
+# generated files seem to need this to find local include files
+HOSTCFLAGS_zconf.lex.o := -I$(src)
+HOSTCFLAGS_zconf.tab.o := -I$(src)
+
+LEX_PREFIX_zconf       := zconf
+YACC_PREFIX_zconf      := zconf
+
+HOSTLOADLIBES_qconf    = $(KC_QT_LIBS)
+HOSTCXXFLAGS_qconf.o   = $(KC_QT_CFLAGS)
+
+HOSTLOADLIBES_gconf    = `pkg-config --libs gtk+-2.0 gmodule-2.0 libglade-2.0`
+HOSTCFLAGS_gconf.o     = `pkg-config --cflags gtk+-2.0 gmodule-2.0 
libglade-2.0` \
+                          -Wno-missing-prototypes
+
+HOSTLOADLIBES_mconf   = $(shell $(CONFIG_SHELL) $(check-lxdialog) -ldflags 
$(HOSTCC))
+
+HOSTLOADLIBES_nconf    = $(shell \
+                               pkg-config --libs menuw panelw ncursesw 
2>/dev/null \
+                               || pkg-config --libs menu panel ncurses 
2>/dev/null \
+                               || echo "-lmenu -lpanel -lncurses"  )
+$(obj)/qconf.o: $(obj)/.tmp_qtcheck
+
+ifeq ($(MAKECMDGOALS),xconfig)
+$(obj)/.tmp_qtcheck: $(src)/Makefile
+-include $(obj)/.tmp_qtcheck
+
+# Qt needs some extra effort...
+$(obj)/.tmp_qtcheck:
+       @set -e; $(kecho) "  CHECK   qt"; dir=""; pkg=""; \
+       if ! pkg-config --exists QtCore 2> /dev/null; then \
+           echo "* Unable to find the Qt4 tool qmake. Trying to use Qt3"; \
+           pkg-config --exists qt 2> /dev/null && pkg=qt; \
+           pkg-config --exists qt-mt 2> /dev/null && pkg=qt-mt; \
+           if [ -n "$$pkg" ]; then \
+             cflags="\$$(shell pkg-config $$pkg --cflags)"; \
+             libs="\$$(shell pkg-config $$pkg --libs)"; \
+             moc="\$$(shell pkg-config $$pkg --variable=prefix)/bin/moc"; \
+             dir="$$(pkg-config $$pkg --variable=prefix)"; \
+           else \
+             for d in $$QTDIR /usr/share/qt* /usr/lib/qt*; do \
+               if [ -f $$d/include/qconfig.h ]; then dir=$$d; break; fi; \
+             done; \
+             if [ -z "$$dir" ]; then \
+               echo >&2 "*"; \
+               echo >&2 "* Unable to find any Qt installation. Please make 
sure that"; \
+               echo >&2 "* the Qt4 or Qt3 development package is correctly 
installed and"; \
+               echo >&2 "* either qmake can be found or install pkg-config or 
set"; \
+               echo >&2 "* the QTDIR environment variable to the correct 
location."; \
+               echo >&2 "*"; \
+               false; \
+             fi; \
+             libpath=$$dir/lib; lib=qt; osdir=""; \
+             $(HOSTCXX) -print-multi-os-directory > /dev/null 2>&1 && \
+               osdir=x$$($(HOSTCXX) -print-multi-os-directory); \
+             test -d $$libpath/$$osdir && libpath=$$libpath/$$osdir; \
+             test -f $$libpath/libqt-mt.so && lib=qt-mt; \
+             cflags="-I$$dir/include"; \
+             libs="-L$$libpath -Wl,-rpath,$$libpath -l$$lib"; \
+             moc="$$dir/bin/moc"; \
+           fi; \
+           if [ ! -x $$dir/bin/moc -a -x /usr/bin/moc ]; then \
+             echo "*"; \
+             echo "* Unable to find $$dir/bin/moc, using /usr/bin/moc 
instead."; \
+             echo "*"; \
+             moc="/usr/bin/moc"; \
+           fi; \
+       else \
+         cflags="\$$(shell pkg-config QtCore QtGui Qt3Support --cflags)"; \
+         libs="\$$(shell pkg-config QtCore QtGui Qt3Support --libs)"; \
+         moc="\$$(shell pkg-config QtCore --variable=moc_location)"; \
+         [ -n "$$moc" ] || moc="\$$(shell pkg-config QtCore 
--variable=prefix)/bin/moc"; \
+       fi; \
+       echo "KC_QT_CFLAGS=$$cflags" > $@; \
+       echo "KC_QT_LIBS=$$libs" >> $@; \
+       echo "KC_QT_MOC=$$moc" >> $@
+endif
+
+$(obj)/gconf.o: $(obj)/.tmp_gtkcheck
+
+ifeq ($(MAKECMDGOALS),gconfig)
+-include $(obj)/.tmp_gtkcheck
+
+# GTK+ needs some extra effort, too...
+$(obj)/.tmp_gtkcheck:
+       @if `pkg-config --exists gtk+-2.0 gmodule-2.0 libglade-2.0`; then       
        \
+               if `pkg-config --atleast-version=2.0.0 gtk+-2.0`; then          
        \
+                       touch $@;                                               
                \
+               else                                                            
        \
+                       echo >&2 "*";                                           
        \
+                       echo >&2 "* GTK+ is present but version >= 2.0.0 is 
required."; \
+                       echo >&2 "*";                                           
        \
+                       false;                                                  
        \
+               fi                                                              
        \
+       else                                                                    
        \
+               echo >&2 "*";                                                   
        \
+               echo >&2 "* Unable to find the GTK+ installation. Please make 
sure that";       \
+               echo >&2 "* the GTK+ 2.0 development package is correctly 
installed...";        \
+               echo >&2 "* You need gtk+-2.0, glib-2.0 and libglade-2.0.";     
        \
+               echo >&2 "*";                                                   
        \
+               false;                                                          
        \
+       fi
+endif
+
+$(obj)/zconf.tab.o: $(obj)/zconf.lex.c $(obj)/zconf.hash.c
+
+$(obj)/qconf.o: $(obj)/qconf.moc
+
+quiet_cmd_moc = MOC     $@
+      cmd_moc = $(KC_QT_MOC) -i $< -o $@
+
+$(obj)/%.moc: $(src)/%.h $(obj)/.tmp_qtcheck
+       $(call cmd,moc)
+
+# Extract gconf menu items for i18n support
+$(obj)/gconf.glade.h: $(obj)/gconf.glade
+       $(Q)intltool-extract --type=gettext/glade --srcdir=$(srctree) \
+       $(obj)/gconf.glade
diff --git a/xen/tools/kconfig/Makefile.host b/xen/tools/kconfig/Makefile.host
new file mode 100644
index 0000000..133edfa
--- /dev/null
+++ b/xen/tools/kconfig/Makefile.host
@@ -0,0 +1,128 @@
+# ==========================================================================
+# Building binaries on the host system
+# Binaries are used during the compilation of the kernel, for example
+# to preprocess a data file.
+#
+# Both C and C++ are supported, but preferred language is C for such utilities.
+#
+# Sample syntax (see Documentation/kbuild/makefiles.txt for reference)
+# hostprogs-y := bin2hex
+# Will compile bin2hex.c and create an executable named bin2hex
+#
+# hostprogs-y    := lxdialog
+# lxdialog-objs := checklist.o lxdialog.o
+# Will compile lxdialog.c and checklist.c, and then link the executable
+# lxdialog, based on checklist.o and lxdialog.o
+#
+# hostprogs-y      := qconf
+# qconf-cxxobjs   := qconf.o
+# qconf-objs      := menu.o
+# Will compile qconf as a C++ program, and menu as a C program.
+# They are linked as C++ code to the executable qconf
+
+__hostprogs := $(sort $(hostprogs-y) $(hostprogs-m))
+
+# C code
+# Executables compiled from a single .c file
+host-csingle   := $(foreach m,$(__hostprogs), \
+                       $(if $($(m)-objs)$($(m)-cxxobjs),,$(m)))
+
+# C executables linked based on several .o files
+host-cmulti    := $(foreach m,$(__hostprogs),\
+                  $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
+
+# Object (.o) files compiled from .c files
+host-cobjs     := $(sort $(foreach m,$(__hostprogs),$($(m)-objs)))
+
+# C++ code
+# C++ executables compiled from at least one .cc file
+# and zero or more .c files
+host-cxxmulti  := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m)))
+
+# C++ Object (.o) files compiled from .cc files
+host-cxxobjs   := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
+
+# output directory for programs/.o files
+# hostprogs-y := tools/build may have been specified.
+# Retrieve also directory of .o files from prog-objs or prog-cxxobjs notation
+host-objdirs := $(dir $(__hostprogs) $(host-cobjs) $(host-cxxobjs))
+
+host-objdirs := $(strip $(sort $(filter-out ./,$(host-objdirs))))
+
+
+__hostprogs     := $(addprefix $(obj)/,$(__hostprogs))
+host-csingle   := $(addprefix $(obj)/,$(host-csingle))
+host-cmulti    := $(addprefix $(obj)/,$(host-cmulti))
+host-cobjs     := $(addprefix $(obj)/,$(host-cobjs))
+host-cxxmulti  := $(addprefix $(obj)/,$(host-cxxmulti))
+host-cxxobjs   := $(addprefix $(obj)/,$(host-cxxobjs))
+host-objdirs    := $(addprefix $(obj)/,$(host-objdirs))
+
+obj-dirs += $(host-objdirs)
+
+#####
+# Handle options to gcc. Support building with separate output directory
+
+_hostc_flags   = $(HOSTCFLAGS)   $(HOST_EXTRACFLAGS)   \
+                 $(HOSTCFLAGS_$(basetarget).o)
+_hostcxx_flags = $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
+                 $(HOSTCXXFLAGS_$(basetarget).o)
+
+ifeq ($(KBUILD_SRC),)
+__hostc_flags  = $(_hostc_flags)
+__hostcxx_flags        = $(_hostcxx_flags)
+else
+__hostc_flags  = -I$(obj) $(call flags,_hostc_flags)
+__hostcxx_flags        = -I$(obj) $(call flags,_hostcxx_flags)
+endif
+
+hostc_flags    = -Wp,-MD,$(depfile) $(__hostc_flags)
+hostcxx_flags  = -Wp,-MD,$(depfile) $(__hostcxx_flags)
+
+#####
+# Compile programs on the host
+
+# Create executable from a single .c file
+# host-csingle -> Executable
+quiet_cmd_host-csingle         = HOSTCC  $@
+      cmd_host-csingle = $(HOSTCC) $(hostc_flags) -o $@ $< \
+               $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
+$(host-csingle): $(obj)/%: $(src)/%.c FORCE
+       $(call if_changed_dep,host-csingle)
+
+# Link an executable based on list of .o files, all plain c
+# host-cmulti -> executable
+quiet_cmd_host-cmulti  = HOSTLD  $@
+      cmd_host-cmulti  = $(HOSTCC) $(HOSTLDFLAGS) -o $@ \
+                         $(addprefix $(obj)/,$($(@F)-objs)) \
+                         $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
+$(host-cmulti): FORCE
+       $(call if_changed,host-cmulti)
+$(call multi_depend, $(host-cmulti), , -objs)
+
+# Create .o file from a single .c file
+# host-cobjs -> .o
+quiet_cmd_host-cobjs   = HOSTCC  $@
+      cmd_host-cobjs   = $(HOSTCC) $(hostc_flags) -c -o $@ $<
+$(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE
+       $(call if_changed_dep,host-cobjs)
+
+# Link an executable based on list of .o files, a mixture of .c and .cc
+# host-cxxmulti -> executable
+quiet_cmd_host-cxxmulti        = HOSTLD  $@
+      cmd_host-cxxmulti        = $(HOSTCXX) $(HOSTLDFLAGS) -o $@ \
+                         $(foreach o,objs cxxobjs,\
+                         $(addprefix $(obj)/,$($(@F)-$(o)))) \
+                         $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
+$(host-cxxmulti): FORCE
+       $(call if_changed,host-cxxmulti)
+$(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs)
+
+# Create .o file from a single .cc (C++) file
+quiet_cmd_host-cxxobjs = HOSTCXX $@
+      cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $<
+$(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE
+       $(call if_changed_dep,host-cxxobjs)
+
+targets += $(host-csingle)  $(host-cmulti) $(host-cobjs)\
+          $(host-cxxmulti) $(host-cxxobjs)
diff --git a/xen/tools/kconfig/POTFILES.in b/xen/tools/kconfig/POTFILES.in
new file mode 100644
index 0000000..9674573
--- /dev/null
+++ b/xen/tools/kconfig/POTFILES.in
@@ -0,0 +1,12 @@
+scripts/kconfig/lxdialog/checklist.c
+scripts/kconfig/lxdialog/inputbox.c
+scripts/kconfig/lxdialog/menubox.c
+scripts/kconfig/lxdialog/textbox.c
+scripts/kconfig/lxdialog/util.c
+scripts/kconfig/lxdialog/yesno.c
+scripts/kconfig/mconf.c
+scripts/kconfig/conf.c
+scripts/kconfig/confdata.c
+scripts/kconfig/gconf.c
+scripts/kconfig/gconf.glade.h
+scripts/kconfig/qconf.cc
diff --git a/xen/tools/kconfig/check.sh b/xen/tools/kconfig/check.sh
new file mode 100755
index 0000000..55b79ba
--- /dev/null
+++ b/xen/tools/kconfig/check.sh
@@ -0,0 +1,13 @@
+#!/bin/sh
+# Needed for systems without gettext
+$* -x c -o /dev/null - > /dev/null 2>&1 << EOF
+#include <libintl.h>
+int main()
+{
+       gettext("");
+       return 0;
+}
+EOF
+if [ ! "$?" -eq "0"  ]; then
+       echo -DKBUILD_NO_NLS;
+fi
diff --git a/xen/tools/kconfig/conf.c b/xen/tools/kconfig/conf.c
new file mode 100644
index 0000000..6c20431
--- /dev/null
+++ b/xen/tools/kconfig/conf.c
@@ -0,0 +1,722 @@
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@xxxxxxxxxxxxxx>
+ * Released under the terms of the GNU GPL v2.0.
+ */
+
+#include <locale.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <errno.h>
+
+#include "lkc.h"
+
+static void conf(struct menu *menu);
+static void check_conf(struct menu *menu);
+static void xfgets(char *str, int size, FILE *in);
+
+enum input_mode {
+       oldaskconfig,
+       silentoldconfig,
+       oldconfig,
+       allnoconfig,
+       allyesconfig,
+       allmodconfig,
+       alldefconfig,
+       randconfig,
+       defconfig,
+       savedefconfig,
+       listnewconfig,
+       olddefconfig,
+} input_mode = oldaskconfig;
+
+static int indent = 1;
+static int tty_stdio;
+static int valid_stdin = 1;
+static int sync_kconfig;
+static int conf_cnt;
+static char line[128];
+static struct menu *rootEntry;
+
+static void print_help(struct menu *menu)
+{
+       struct gstr help = str_new();
+
+       menu_get_ext_help(menu, &help);
+
+       printf("\n%s\n", str_get(&help));
+       str_free(&help);
+}
+
+static void strip(char *str)
+{
+       char *p = str;
+       int l;
+
+       while ((isspace(*p)))
+               p++;
+       l = strlen(p);
+       if (p != str)
+               memmove(str, p, l + 1);
+       if (!l)
+               return;
+       p = str + l - 1;
+       while ((isspace(*p)))
+               *p-- = 0;
+}
+
+static void check_stdin(void)
+{
+       if (!valid_stdin) {
+               printf(_("aborted!\n\n"));
+               printf(_("Console input/output is redirected. "));
+               printf(_("Run 'make oldconfig' to update configuration.\n\n"));
+               exit(1);
+       }
+}
+
+static int conf_askvalue(struct symbol *sym, const char *def)
+{
+       enum symbol_type type = sym_get_type(sym);
+
+       if (!sym_has_value(sym))
+               printf(_("(NEW) "));
+
+       line[0] = '\n';
+       line[1] = 0;
+
+       if (!sym_is_changable(sym)) {
+               printf("%s\n", def);
+               line[0] = '\n';
+               line[1] = 0;
+               return 0;
+       }
+
+       switch (input_mode) {
+       case oldconfig:
+       case silentoldconfig:
+               if (sym_has_value(sym)) {
+                       printf("%s\n", def);
+                       return 0;
+               }
+               check_stdin();
+               /* fall through */
+       case oldaskconfig:
+               fflush(stdout);
+               xfgets(line, 128, stdin);
+               if (!tty_stdio)
+                       printf("\n");
+               return 1;
+       default:
+               break;
+       }
+
+       switch (type) {
+       case S_INT:
+       case S_HEX:
+       case S_STRING:
+               printf("%s\n", def);
+               return 1;
+       default:
+               ;
+       }
+       printf("%s", line);
+       return 1;
+}
+
+static int conf_string(struct menu *menu)
+{
+       struct symbol *sym = menu->sym;
+       const char *def;
+
+       while (1) {
+               printf("%*s%s ", indent - 1, "", _(menu->prompt->text));
+               printf("(%s) ", sym->name);
+               def = sym_get_string_value(sym);
+               if (sym_get_string_value(sym))
+                       printf("[%s] ", def);
+               if (!conf_askvalue(sym, def))
+                       return 0;
+               switch (line[0]) {
+               case '\n':
+                       break;
+               case '?':
+                       /* print help */
+                       if (line[1] == '\n') {
+                               print_help(menu);
+                               def = NULL;
+                               break;
+                       }
+                       /* fall through */
+               default:
+                       line[strlen(line)-1] = 0;
+                       def = line;
+               }
+               if (def && sym_set_string_value(sym, def))
+                       return 0;
+       }
+}
+
+static int conf_sym(struct menu *menu)
+{
+       struct symbol *sym = menu->sym;
+       tristate oldval, newval;
+
+       while (1) {
+               printf("%*s%s ", indent - 1, "", _(menu->prompt->text));
+               if (sym->name)
+                       printf("(%s) ", sym->name);
+               putchar('[');
+               oldval = sym_get_tristate_value(sym);
+               switch (oldval) {
+               case no:
+                       putchar('N');
+                       break;
+               case mod:
+                       putchar('M');
+                       break;
+               case yes:
+                       putchar('Y');
+                       break;
+               }
+               if (oldval != no && sym_tristate_within_range(sym, no))
+                       printf("/n");
+               if (oldval != mod && sym_tristate_within_range(sym, mod))
+                       printf("/m");
+               if (oldval != yes && sym_tristate_within_range(sym, yes))
+                       printf("/y");
+               if (menu_has_help(menu))
+                       printf("/?");
+               printf("] ");
+               if (!conf_askvalue(sym, sym_get_string_value(sym)))
+                       return 0;
+               strip(line);
+
+               switch (line[0]) {
+               case 'n':
+               case 'N':
+                       newval = no;
+                       if (!line[1] || !strcmp(&line[1], "o"))
+                               break;
+                       continue;
+               case 'm':
+               case 'M':
+                       newval = mod;
+                       if (!line[1])
+                               break;
+                       continue;
+               case 'y':
+               case 'Y':
+                       newval = yes;
+                       if (!line[1] || !strcmp(&line[1], "es"))
+                               break;
+                       continue;
+               case 0:
+                       newval = oldval;
+                       break;
+               case '?':
+                       goto help;
+               default:
+                       continue;
+               }
+               if (sym_set_tristate_value(sym, newval))
+                       return 0;
+help:
+               print_help(menu);
+       }
+}
+
+static int conf_choice(struct menu *menu)
+{
+       struct symbol *sym, *def_sym;
+       struct menu *child;
+       bool is_new;
+
+       sym = menu->sym;
+       is_new = !sym_has_value(sym);
+       if (sym_is_changable(sym)) {
+               conf_sym(menu);
+               sym_calc_value(sym);
+               switch (sym_get_tristate_value(sym)) {
+               case no:
+                       return 1;
+               case mod:
+                       return 0;
+               case yes:
+                       break;
+               }
+       } else {
+               switch (sym_get_tristate_value(sym)) {
+               case no:
+                       return 1;
+               case mod:
+                       printf("%*s%s\n", indent - 1, "", 
_(menu_get_prompt(menu)));
+                       return 0;
+               case yes:
+                       break;
+               }
+       }
+
+       while (1) {
+               int cnt, def;
+
+               printf("%*s%s\n", indent - 1, "", _(menu_get_prompt(menu)));
+               def_sym = sym_get_choice_value(sym);
+               cnt = def = 0;
+               line[0] = 0;
+               for (child = menu->list; child; child = child->next) {
+                       if (!menu_is_visible(child))
+                               continue;
+                       if (!child->sym) {
+                               printf("%*c %s\n", indent, '*', 
_(menu_get_prompt(child)));
+                               continue;
+                       }
+                       cnt++;
+                       if (child->sym == def_sym) {
+                               def = cnt;
+                               printf("%*c", indent, '>');
+                       } else
+                               printf("%*c", indent, ' ');
+                       printf(" %d. %s", cnt, _(menu_get_prompt(child)));
+                       if (child->sym->name)
+                               printf(" (%s)", child->sym->name);
+                       if (!sym_has_value(child->sym))
+                               printf(_(" (NEW)"));
+                       printf("\n");
+               }
+               printf(_("%*schoice"), indent - 1, "");
+               if (cnt == 1) {
+                       printf("[1]: 1\n");
+                       goto conf_childs;
+               }
+               printf("[1-%d", cnt);
+               if (menu_has_help(menu))
+                       printf("?");
+               printf("]: ");
+               switch (input_mode) {
+               case oldconfig:
+               case silentoldconfig:
+                       if (!is_new) {
+                               cnt = def;
+                               printf("%d\n", cnt);
+                               break;
+                       }
+                       check_stdin();
+                       /* fall through */
+               case oldaskconfig:
+                       fflush(stdout);
+                       xfgets(line, 128, stdin);
+                       strip(line);
+                       if (line[0] == '?') {
+                               print_help(menu);
+                               continue;
+                       }
+                       if (!line[0])
+                               cnt = def;
+                       else if (isdigit(line[0]))
+                               cnt = atoi(line);
+                       else
+                               continue;
+                       break;
+               default:
+                       break;
+               }
+
+       conf_childs:
+               for (child = menu->list; child; child = child->next) {
+                       if (!child->sym || !menu_is_visible(child))
+                               continue;
+                       if (!--cnt)
+                               break;
+               }
+               if (!child)
+                       continue;
+               if (line[0] && line[strlen(line) - 1] == '?') {
+                       print_help(child);
+                       continue;
+               }
+               sym_set_choice_value(sym, child->sym);
+               for (child = child->list; child; child = child->next) {
+                       indent += 2;
+                       conf(child);
+                       indent -= 2;
+               }
+               return 1;
+       }
+}
+
+static void conf(struct menu *menu)
+{
+       struct symbol *sym;
+       struct property *prop;
+       struct menu *child;
+
+       if (!menu_is_visible(menu))
+               return;
+
+       sym = menu->sym;
+       prop = menu->prompt;
+       if (prop) {
+               const char *prompt;
+
+               switch (prop->type) {
+               case P_MENU:
+                       if ((input_mode == silentoldconfig ||
+                            input_mode == listnewconfig ||
+                            input_mode == olddefconfig) &&
+                           rootEntry != menu) {
+                               check_conf(menu);
+                               return;
+                       }
+                       /* fall through */
+               case P_COMMENT:
+                       prompt = menu_get_prompt(menu);
+                       if (prompt)
+                               printf("%*c\n%*c %s\n%*c\n",
+                                       indent, '*',
+                                       indent, '*', _(prompt),
+                                       indent, '*');
+               default:
+                       ;
+               }
+       }
+
+       if (!sym)
+               goto conf_childs;
+
+       if (sym_is_choice(sym)) {
+               conf_choice(menu);
+               if (sym->curr.tri != mod)
+                       return;
+               goto conf_childs;
+       }
+
+       switch (sym->type) {
+       case S_INT:
+       case S_HEX:
+       case S_STRING:
+               conf_string(menu);
+               break;
+       default:
+               conf_sym(menu);
+               break;
+       }
+
+conf_childs:
+       if (sym)
+               indent += 2;
+       for (child = menu->list; child; child = child->next)
+               conf(child);
+       if (sym)
+               indent -= 2;
+}
+
+static void check_conf(struct menu *menu)
+{
+       struct symbol *sym;
+       struct menu *child;
+
+       if (!menu_is_visible(menu))
+               return;
+
+       sym = menu->sym;
+       if (sym && !sym_has_value(sym)) {
+               if (sym_is_changable(sym) ||
+                   (sym_is_choice(sym) && sym_get_tristate_value(sym) == yes)) 
{
+                       if (input_mode == listnewconfig) {
+                               if (sym->name && !sym_is_choice_value(sym)) {
+                                       printf("%s%s\n", CONFIG_, sym->name);
+                               }
+                       } else if (input_mode != olddefconfig) {
+                               if (!conf_cnt++)
+                                       printf(_("*\n* Restart 
config...\n*\n"));
+                               rootEntry = menu_get_parent_menu(menu);
+                               conf(rootEntry);
+                       }
+               }
+       }
+
+       for (child = menu->list; child; child = child->next)
+               check_conf(child);
+}
+
+static struct option long_opts[] = {
+       {"oldaskconfig",    no_argument,       NULL, oldaskconfig},
+       {"oldconfig",       no_argument,       NULL, oldconfig},
+       {"silentoldconfig", no_argument,       NULL, silentoldconfig},
+       {"defconfig",       optional_argument, NULL, defconfig},
+       {"savedefconfig",   required_argument, NULL, savedefconfig},
+       {"allnoconfig",     no_argument,       NULL, allnoconfig},
+       {"allyesconfig",    no_argument,       NULL, allyesconfig},
+       {"allmodconfig",    no_argument,       NULL, allmodconfig},
+       {"alldefconfig",    no_argument,       NULL, alldefconfig},
+       {"randconfig",      no_argument,       NULL, randconfig},
+       {"listnewconfig",   no_argument,       NULL, listnewconfig},
+       {"olddefconfig",    no_argument,       NULL, olddefconfig},
+       /*
+        * oldnoconfig is an alias of olddefconfig, because people already
+        * are dependent on its behavior(sets new symbols to their default
+        * value but not 'n') with the counter-intuitive name.
+        */
+       {"oldnoconfig",     no_argument,       NULL, olddefconfig},
+       {NULL, 0, NULL, 0}
+};
+
+static void conf_usage(const char *progname)
+{
+
+       printf("Usage: %s [-s] [option] <kconfig-file>\n", progname);
+       printf("[option] is _one_ of the following:\n");
+       printf("  --listnewconfig         List new options\n");
+       printf("  --oldaskconfig          Start a new configuration using a 
line-oriented program\n");
+       printf("  --oldconfig             Update a configuration using a 
provided .config as base\n");
+       printf("  --silentoldconfig       Same as oldconfig, but quietly, 
additionally update deps\n");
+       printf("  --olddefconfig          Same as silentoldconfig but sets new 
symbols to their default value\n");
+       printf("  --oldnoconfig           An alias of olddefconfig\n");
+       printf("  --defconfig <file>      New config with default defined in 
<file>\n");
+       printf("  --savedefconfig <file>  Save the minimal current 
configuration to <file>\n");
+       printf("  --allnoconfig           New config where all options are 
answered with no\n");
+       printf("  --allyesconfig          New config where all options are 
answered with yes\n");
+       printf("  --allmodconfig          New config where all options are 
answered with mod\n");
+       printf("  --alldefconfig          New config with all symbols set to 
default\n");
+       printf("  --randconfig            New config with random answer to all 
options\n");
+}
+
+int main(int ac, char **av)
+{
+       const char *progname = av[0];
+       int opt;
+       const char *name, *defconfig_file = NULL /* gcc uninit */;
+       struct stat tmpstat;
+
+       setlocale(LC_ALL, "");
+       bindtextdomain(PACKAGE, LOCALEDIR);
+       textdomain(PACKAGE);
+
+       tty_stdio = isatty(0) && isatty(1) && isatty(2);
+
+       while ((opt = getopt_long(ac, av, "s", long_opts, NULL)) != -1) {
+               if (opt == 's') {
+                       conf_set_message_callback(NULL);
+                       continue;
+               }
+               input_mode = (enum input_mode)opt;
+               switch (opt) {
+               case silentoldconfig:
+                       sync_kconfig = 1;
+                       break;
+               case defconfig:
+               case savedefconfig:
+                       defconfig_file = optarg;
+                       break;
+               case randconfig:
+               {
+                       struct timeval now;
+                       unsigned int seed;
+                       char *seed_env;
+
+                       /*
+                        * Use microseconds derived seed,
+                        * compensate for systems where it may be zero
+                        */
+                       gettimeofday(&now, NULL);
+                       seed = (unsigned int)((now.tv_sec + 1) * (now.tv_usec + 
1));
+
+                       seed_env = getenv("KCONFIG_SEED");
+                       if( seed_env && *seed_env ) {
+                               char *endp;
+                               int tmp = (int)strtol(seed_env, &endp, 0);
+                               if (*endp == '\0') {
+                                       seed = tmp;
+                               }
+                       }
+                       fprintf( stderr, "KCONFIG_SEED=0x%X\n", seed );
+                       srand(seed);
+                       break;
+               }
+               case oldaskconfig:
+               case oldconfig:
+               case allnoconfig:
+               case allyesconfig:
+               case allmodconfig:
+               case alldefconfig:
+               case listnewconfig:
+               case olddefconfig:
+                       break;
+               case '?':
+                       conf_usage(progname);
+                       exit(1);
+                       break;
+               }
+       }
+       if (ac == optind) {
+               printf(_("%s: Kconfig file missing\n"), av[0]);
+               conf_usage(progname);
+               exit(1);
+       }
+       name = av[optind];
+       conf_parse(name);
+       //zconfdump(stdout);
+       if (sync_kconfig) {
+               name = conf_get_configname();
+               if (stat(name, &tmpstat)) {
+                       fprintf(stderr, _("***\n"
+                               "*** Configuration file \"%s\" not found!\n"
+                               "***\n"
+                               "*** Please run some configurator (e.g. \"make 
oldconfig\" or\n"
+                               "*** \"make menuconfig\" or \"make 
xconfig\").\n"
+                               "***\n"), name);
+                       exit(1);
+               }
+       }
+
+       switch (input_mode) {
+       case defconfig:
+               if (!defconfig_file)
+                       defconfig_file = conf_get_default_confname();
+               if (conf_read(defconfig_file)) {
+                       printf(_("***\n"
+                               "*** Can't find default configuration \"%s\"!\n"
+                               "***\n"), defconfig_file);
+                       exit(1);
+               }
+               break;
+       case savedefconfig:
+       case silentoldconfig:
+       case oldaskconfig:
+       case oldconfig:
+       case listnewconfig:
+       case olddefconfig:
+               conf_read(NULL);
+               break;
+       case allnoconfig:
+       case allyesconfig:
+       case allmodconfig:
+       case alldefconfig:
+       case randconfig:
+               name = getenv("KCONFIG_ALLCONFIG");
+               if (!name)
+                       break;
+               if ((strcmp(name, "") != 0) && (strcmp(name, "1") != 0)) {
+                       if (conf_read_simple(name, S_DEF_USER)) {
+                               fprintf(stderr,
+                                       _("*** Can't read seed configuration 
\"%s\"!\n"),
+                                       name);
+                               exit(1);
+                       }
+                       break;
+               }
+               switch (input_mode) {
+               case allnoconfig:       name = "allno.config"; break;
+               case allyesconfig:      name = "allyes.config"; break;
+               case allmodconfig:      name = "allmod.config"; break;
+               case alldefconfig:      name = "alldef.config"; break;
+               case randconfig:        name = "allrandom.config"; break;
+               default: break;
+               }
+               if (conf_read_simple(name, S_DEF_USER) &&
+                   conf_read_simple("all.config", S_DEF_USER)) {
+                       fprintf(stderr,
+                               _("*** KCONFIG_ALLCONFIG set, but no \"%s\" or 
\"all.config\" file found\n"),
+                               name);
+                       exit(1);
+               }
+               break;
+       default:
+               break;
+       }
+
+       if (sync_kconfig) {
+               if (conf_get_changed()) {
+                       name = getenv("KCONFIG_NOSILENTUPDATE");
+                       if (name && *name) {
+                               fprintf(stderr,
+                                       _("\n*** The configuration requires 
explicit update.\n\n"));
+                               return 1;
+                       }
+               }
+               valid_stdin = tty_stdio;
+       }
+
+       switch (input_mode) {
+       case allnoconfig:
+               conf_set_all_new_symbols(def_no);
+               break;
+       case allyesconfig:
+               conf_set_all_new_symbols(def_yes);
+               break;
+       case allmodconfig:
+               conf_set_all_new_symbols(def_mod);
+               break;
+       case alldefconfig:
+               conf_set_all_new_symbols(def_default);
+               break;
+       case randconfig:
+               /* Really nothing to do in this loop */
+               while (conf_set_all_new_symbols(def_random)) ;
+               break;
+       case defconfig:
+               conf_set_all_new_symbols(def_default);
+               break;
+       case savedefconfig:
+               break;
+       case oldaskconfig:
+               rootEntry = &rootmenu;
+               conf(&rootmenu);
+               input_mode = silentoldconfig;
+               /* fall through */
+       case oldconfig:
+       case listnewconfig:
+       case olddefconfig:
+       case silentoldconfig:
+               /* Update until a loop caused no more changes */
+               do {
+                       conf_cnt = 0;
+                       check_conf(&rootmenu);
+               } while (conf_cnt &&
+                        (input_mode != listnewconfig &&
+                         input_mode != olddefconfig));
+               break;
+       }
+
+       if (sync_kconfig) {
+               /* silentoldconfig is used during the build so we shall update 
autoconf.
+                * All other commands are only used to generate a config.
+                */
+               if (conf_get_changed() && conf_write(NULL)) {
+                       fprintf(stderr, _("\n*** Error during writing of the 
configuration.\n\n"));
+                       exit(1);
+               }
+               if (conf_write_autoconf()) {
+                       fprintf(stderr, _("\n*** Error during update of the 
configuration.\n\n"));
+                       return 1;
+               }
+       } else if (input_mode == savedefconfig) {
+               if (conf_write_defconfig(defconfig_file)) {
+                       fprintf(stderr, _("n*** Error while saving defconfig 
to: %s\n\n"),
+                               defconfig_file);
+                       return 1;
+               }
+       } else if (input_mode != listnewconfig) {
+               if (conf_write(NULL)) {
+                       fprintf(stderr, _("\n*** Error during writing of the 
configuration.\n\n"));
+                       exit(1);
+               }
+       }
+       return 0;
+}
+
+/*
+ * Helper function to facilitate fgets() by Jean Sacren.
+ */
+void xfgets(char *str, int size, FILE *in)
+{
+       if (fgets(str, size, in) == NULL)
+               fprintf(stderr, "\nError in reading or end of file.\n");
+}
diff --git a/xen/tools/kconfig/confdata.c b/xen/tools/kconfig/confdata.c
new file mode 100644
index 0000000..0b7dc2f
--- /dev/null
+++ b/xen/tools/kconfig/confdata.c
@@ -0,0 +1,1245 @@
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@xxxxxxxxxxxxxx>
+ * Released under the terms of the GNU GPL v2.0.
+ */
+
+#include <sys/stat.h>
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "lkc.h"
+
+struct conf_printer {
+       void (*print_symbol)(FILE *, struct symbol *, const char *, void *);
+       void (*print_comment)(FILE *, const char *, void *);
+};
+
+static void conf_warning(const char *fmt, ...)
+       __attribute__ ((format (printf, 1, 2)));
+
+static void conf_message(const char *fmt, ...)
+       __attribute__ ((format (printf, 1, 2)));
+
+static const char *conf_filename;
+static int conf_lineno, conf_warnings, conf_unsaved;
+
+const char conf_defname[] = "arch/$ARCH/defconfig";
+
+static void conf_warning(const char *fmt, ...)
+{
+       va_list ap;
+       va_start(ap, fmt);
+       fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
+       vfprintf(stderr, fmt, ap);
+       fprintf(stderr, "\n");
+       va_end(ap);
+       conf_warnings++;
+}
+
+static void conf_default_message_callback(const char *fmt, va_list ap)
+{
+       printf("#\n# ");
+       vprintf(fmt, ap);
+       printf("\n#\n");
+}
+
+static void (*conf_message_callback) (const char *fmt, va_list ap) =
+       conf_default_message_callback;
+void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap))
+{
+       conf_message_callback = fn;
+}
+
+static void conf_message(const char *fmt, ...)
+{
+       va_list ap;
+
+       va_start(ap, fmt);
+       if (conf_message_callback)
+               conf_message_callback(fmt, ap);
+       va_end(ap);
+}
+
+const char *conf_get_configname(void)
+{
+       char *name = getenv("KCONFIG_CONFIG");
+
+       return name ? name : ".config";
+}
+
+const char *conf_get_autoconfig_name(void)
+{
+       char *name = getenv("KCONFIG_AUTOCONFIG");
+
+       return name ? name : "include/config/auto.conf";
+}
+
+static char *conf_expand_value(const char *in)
+{
+       struct symbol *sym;
+       const char *src;
+       static char res_value[SYMBOL_MAXLENGTH];
+       char *dst, name[SYMBOL_MAXLENGTH];
+
+       res_value[0] = 0;
+       dst = name;
+       while ((src = strchr(in, '$'))) {
+               strncat(res_value, in, src - in);
+               src++;
+               dst = name;
+               while (isalnum(*src) || *src == '_')
+                       *dst++ = *src++;
+               *dst = 0;
+               sym = sym_lookup(name, 0);
+               sym_calc_value(sym);
+               strcat(res_value, sym_get_string_value(sym));
+               in = src;
+       }
+       strcat(res_value, in);
+
+       return res_value;
+}
+
+char *conf_get_default_confname(void)
+{
+       struct stat buf;
+       static char fullname[PATH_MAX+1];
+       char *env, *name;
+
+       name = conf_expand_value(conf_defname);
+       env = getenv(SRCTREE);
+       if (env) {
+               sprintf(fullname, "%s/%s", env, name);
+               if (!stat(fullname, &buf))
+                       return fullname;
+       }
+       return name;
+}
+
+static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char 
*p)
+{
+       char *p2;
+
+       switch (sym->type) {
+       case S_TRISTATE:
+               if (p[0] == 'm') {
+                       sym->def[def].tri = mod;
+                       sym->flags |= def_flags;
+                       break;
+               }
+               /* fall through */
+       case S_BOOLEAN:
+               if (p[0] == 'y') {
+                       sym->def[def].tri = yes;
+                       sym->flags |= def_flags;
+                       break;
+               }
+               if (p[0] == 'n') {
+                       sym->def[def].tri = no;
+                       sym->flags |= def_flags;
+                       break;
+               }
+               if (def != S_DEF_AUTO)
+                       conf_warning("symbol value '%s' invalid for %s",
+                                    p, sym->name);
+               return 1;
+       case S_OTHER:
+               if (*p != '"') {
+                       for (p2 = p; *p2 && !isspace(*p2); p2++)
+                               ;
+                       sym->type = S_STRING;
+                       goto done;
+               }
+               /* fall through */
+       case S_STRING:
+               if (*p++ != '"')
+                       break;
+               for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
+                       if (*p2 == '"') {
+                               *p2 = 0;
+                               break;
+                       }
+                       memmove(p2, p2 + 1, strlen(p2));
+               }
+               if (!p2) {
+                       if (def != S_DEF_AUTO)
+                               conf_warning("invalid string found");
+                       return 1;
+               }
+               /* fall through */
+       case S_INT:
+       case S_HEX:
+       done:
+               if (sym_string_valid(sym, p)) {
+                       sym->def[def].val = strdup(p);
+                       sym->flags |= def_flags;
+               } else {
+                       if (def != S_DEF_AUTO)
+                               conf_warning("symbol value '%s' invalid for %s",
+                                            p, sym->name);
+                       return 1;
+               }
+               break;
+       default:
+               ;
+       }
+       return 0;
+}
+
+#define LINE_GROWTH 16
+static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
+{
+       char *nline;
+       size_t new_size = slen + 1;
+       if (new_size > *n) {
+               new_size += LINE_GROWTH - 1;
+               new_size *= 2;
+               nline = realloc(*lineptr, new_size);
+               if (!nline)
+                       return -1;
+
+               *lineptr = nline;
+               *n = new_size;
+       }
+
+       (*lineptr)[slen] = c;
+
+       return 0;
+}
+
+static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
+{
+       char *line = *lineptr;
+       size_t slen = 0;
+
+       for (;;) {
+               int c = getc(stream);
+
+               switch (c) {
+               case '\n':
+                       if (add_byte(c, &line, slen, n) < 0)
+                               goto e_out;
+                       slen++;
+                       /* fall through */
+               case EOF:
+                       if (add_byte('\0', &line, slen, n) < 0)
+                               goto e_out;
+                       *lineptr = line;
+                       if (slen == 0)
+                               return -1;
+                       return slen;
+               default:
+                       if (add_byte(c, &line, slen, n) < 0)
+                               goto e_out;
+                       slen++;
+               }
+       }
+
+e_out:
+       line[slen-1] = '\0';
+       *lineptr = line;
+       return -1;
+}
+
+int conf_read_simple(const char *name, int def)
+{
+       FILE *in = NULL;
+       char   *line = NULL;
+       size_t  line_asize = 0;
+       char *p, *p2;
+       struct symbol *sym;
+       int i, def_flags;
+
+       if (name) {
+               in = zconf_fopen(name);
+       } else {
+               struct property *prop;
+
+               name = conf_get_configname();
+               in = zconf_fopen(name);
+               if (in)
+                       goto load;
+               sym_add_change_count(1);
+               if (!sym_defconfig_list) {
+                       sym_calc_value(modules_sym);
+                       return 1;
+               }
+
+               for_all_defaults(sym_defconfig_list, prop) {
+                       if (expr_calc_value(prop->visible.expr) == no ||
+                           prop->expr->type != E_SYMBOL)
+                               continue;
+                       name = conf_expand_value(prop->expr->left.sym->name);
+                       in = zconf_fopen(name);
+                       if (in) {
+                               conf_message(_("using defaults found in %s"),
+                                        name);
+                               goto load;
+                       }
+               }
+       }
+       if (!in)
+               return 1;
+
+load:
+       conf_filename = name;
+       conf_lineno = 0;
+       conf_warnings = 0;
+       conf_unsaved = 0;
+
+       def_flags = SYMBOL_DEF << def;
+       for_all_symbols(i, sym) {
+               sym->flags |= SYMBOL_CHANGED;
+               sym->flags &= ~(def_flags|SYMBOL_VALID);
+               if (sym_is_choice(sym))
+                       sym->flags |= def_flags;
+               switch (sym->type) {
+               case S_INT:
+               case S_HEX:
+               case S_STRING:
+                       if (sym->def[def].val)
+                               free(sym->def[def].val);
+                       /* fall through */
+               default:
+                       sym->def[def].val = NULL;
+                       sym->def[def].tri = no;
+               }
+       }
+
+       while (compat_getline(&line, &line_asize, in) != -1) {
+               conf_lineno++;
+               sym = NULL;
+               if (line[0] == '#') {
+                       if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
+                               continue;
+                       p = strchr(line + 2 + strlen(CONFIG_), ' ');
+                       if (!p)
+                               continue;
+                       *p++ = 0;
+                       if (strncmp(p, "is not set", 10))
+                               continue;
+                       if (def == S_DEF_USER) {
+                               sym = sym_find(line + 2 + strlen(CONFIG_));
+                               if (!sym) {
+                                       sym_add_change_count(1);
+                                       goto setsym;
+                               }
+                       } else {
+                               sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
+                               if (sym->type == S_UNKNOWN)
+                                       sym->type = S_BOOLEAN;
+                       }
+                       if (sym->flags & def_flags) {
+                               conf_warning("override: reassigning to symbol 
%s", sym->name);
+                       }
+                       switch (sym->type) {
+                       case S_BOOLEAN:
+                       case S_TRISTATE:
+                               sym->def[def].tri = no;
+                               sym->flags |= def_flags;
+                               break;
+                       default:
+                               ;
+                       }
+               } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
+                       p = strchr(line + strlen(CONFIG_), '=');
+                       if (!p)
+                               continue;
+                       *p++ = 0;
+                       p2 = strchr(p, '\n');
+                       if (p2) {
+                               *p2-- = 0;
+                               if (*p2 == '\r')
+                                       *p2 = 0;
+                       }
+                       if (def == S_DEF_USER) {
+                               sym = sym_find(line + strlen(CONFIG_));
+                               if (!sym) {
+                                       sym_add_change_count(1);
+                                       goto setsym;
+                               }
+                       } else {
+                               sym = sym_lookup(line + strlen(CONFIG_), 0);
+                               if (sym->type == S_UNKNOWN)
+                                       sym->type = S_OTHER;
+                       }
+                       if (sym->flags & def_flags) {
+                               conf_warning("override: reassigning to symbol 
%s", sym->name);
+                       }
+                       if (conf_set_sym_val(sym, def, def_flags, p))
+                               continue;
+               } else {
+                       if (line[0] != '\r' && line[0] != '\n')
+                               conf_warning("unexpected data");
+                       continue;
+               }
+setsym:
+               if (sym && sym_is_choice_value(sym)) {
+                       struct symbol *cs = 
prop_get_symbol(sym_get_choice_prop(sym));
+                       switch (sym->def[def].tri) {
+                       case no:
+                               break;
+                       case mod:
+                               if (cs->def[def].tri == yes) {
+                                       conf_warning("%s creates inconsistent 
choice state", sym->name);
+                                       cs->flags &= ~def_flags;
+                               }
+                               break;
+                       case yes:
+                               if (cs->def[def].tri != no)
+                                       conf_warning("override: %s changes 
choice state", sym->name);
+                               cs->def[def].val = sym;
+                               break;
+                       }
+                       cs->def[def].tri = EXPR_OR(cs->def[def].tri, 
sym->def[def].tri);
+               }
+       }
+       free(line);
+       fclose(in);
+       sym_calc_value(modules_sym);
+       return 0;
+}
+
+int conf_read(const char *name)
+{
+       struct symbol *sym;
+       int i;
+
+       sym_set_change_count(0);
+
+       if (conf_read_simple(name, S_DEF_USER))
+               return 1;
+
+       for_all_symbols(i, sym) {
+               sym_calc_value(sym);
+               if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
+                       continue;
+               if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
+                       /* check that calculated value agrees with saved value 
*/
+                       switch (sym->type) {
+                       case S_BOOLEAN:
+                       case S_TRISTATE:
+                               if (sym->def[S_DEF_USER].tri != 
sym_get_tristate_value(sym))
+                                       break;
+                               if (!sym_is_choice(sym))
+                                       continue;
+                               /* fall through */
+                       default:
+                               if (!strcmp(sym->curr.val, 
sym->def[S_DEF_USER].val))
+                                       continue;
+                               break;
+                       }
+               } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
+                       /* no previous value and not saved */
+                       continue;
+               conf_unsaved++;
+               /* maybe print value in verbose mode... */
+       }
+
+       for_all_symbols(i, sym) {
+               if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
+                       /* Reset values of generates values, so they'll appear
+                        * as new, if they should become visible, but that
+                        * doesn't quite work if the Kconfig and the saved
+                        * configuration disagree.
+                        */
+                       if (sym->visible == no && !conf_unsaved)
+                               sym->flags &= ~SYMBOL_DEF_USER;
+                       switch (sym->type) {
+                       case S_STRING:
+                       case S_INT:
+                       case S_HEX:
+                               /* Reset a string value if it's out of range */
+                               if (sym_string_within_range(sym, 
sym->def[S_DEF_USER].val))
+                                       break;
+                               sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
+                               conf_unsaved++;
+                               break;
+                       default:
+                               break;
+                       }
+               }
+       }
+
+       sym_add_change_count(conf_warnings || conf_unsaved);
+
+       return 0;
+}
+
+/*
+ * Kconfig configuration printer
+ *
+ * This printer is used when generating the resulting configuration after
+ * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
+ * passing a non-NULL argument to the printer.
+ *
+ */
+static void
+kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void 
*arg)
+{
+
+       switch (sym->type) {
+       case S_BOOLEAN:
+       case S_TRISTATE:
+               if (*value == 'n') {
+                       bool skip_unset = (arg != NULL);
+
+                       if (!skip_unset)
+                               fprintf(fp, "# %s%s is not set\n",
+                                   CONFIG_, sym->name);
+                       return;
+               }
+               break;
+       default:
+               break;
+       }
+
+       fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
+}
+
+static void
+kconfig_print_comment(FILE *fp, const char *value, void *arg)
+{
+       const char *p = value;
+       size_t l;
+
+       for (;;) {
+               l = strcspn(p, "\n");
+               fprintf(fp, "#");
+               if (l) {
+                       fprintf(fp, " ");
+                       xfwrite(p, l, 1, fp);
+                       p += l;
+               }
+               fprintf(fp, "\n");
+               if (*p++ == '\0')
+                       break;
+       }
+}
+
+static struct conf_printer kconfig_printer_cb =
+{
+       .print_symbol = kconfig_print_symbol,
+       .print_comment = kconfig_print_comment,
+};
+
+/*
+ * Header printer
+ *
+ * This printer is used when generating the `include/generated/autoconf.h' 
file.
+ */
+static void
+header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
+{
+
+       switch (sym->type) {
+       case S_BOOLEAN:
+       case S_TRISTATE: {
+               const char *suffix = "";
+
+               switch (*value) {
+               case 'n':
+                       break;
+               case 'm':
+                       suffix = "_MODULE";
+                       /* fall through */
+               default:
+                       fprintf(fp, "#define %s%s%s 1\n",
+                           CONFIG_, sym->name, suffix);
+               }
+               break;
+       }
+       case S_HEX: {
+               const char *prefix = "";
+
+               if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
+                       prefix = "0x";
+               fprintf(fp, "#define %s%s %s%s\n",
+                   CONFIG_, sym->name, prefix, value);
+               break;
+       }
+       case S_STRING:
+       case S_INT:
+               fprintf(fp, "#define %s%s %s\n",
+                   CONFIG_, sym->name, value);
+               break;
+       default:
+               break;
+       }
+
+}
+
+static void
+header_print_comment(FILE *fp, const char *value, void *arg)
+{
+       const char *p = value;
+       size_t l;
+
+       fprintf(fp, "/*\n");
+       for (;;) {
+               l = strcspn(p, "\n");
+               fprintf(fp, " *");
+               if (l) {
+                       fprintf(fp, " ");
+                       xfwrite(p, l, 1, fp);
+                       p += l;
+               }
+               fprintf(fp, "\n");
+               if (*p++ == '\0')
+                       break;
+       }
+       fprintf(fp, " */\n");
+}
+
+static struct conf_printer header_printer_cb =
+{
+       .print_symbol = header_print_symbol,
+       .print_comment = header_print_comment,
+};
+
+/*
+ * Tristate printer
+ *
+ * This printer is used when generating the `include/config/tristate.conf' 
file.
+ */
+static void
+tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void 
*arg)
+{
+
+       if (sym->type == S_TRISTATE && *value != 'n')
+               fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, 
(char)toupper(*value));
+}
+
+static struct conf_printer tristate_printer_cb =
+{
+       .print_symbol = tristate_print_symbol,
+       .print_comment = kconfig_print_comment,
+};
+
+static void conf_write_symbol(FILE *fp, struct symbol *sym,
+                             struct conf_printer *printer, void *printer_arg)
+{
+       const char *str;
+
+       switch (sym->type) {
+       case S_OTHER:
+       case S_UNKNOWN:
+               break;
+       case S_STRING:
+               str = sym_get_string_value(sym);
+               str = sym_escape_string_value(str);
+               printer->print_symbol(fp, sym, str, printer_arg);
+               free((void *)str);
+               break;
+       default:
+               str = sym_get_string_value(sym);
+               printer->print_symbol(fp, sym, str, printer_arg);
+       }
+}
+
+static void
+conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
+{
+       char buf[256];
+
+       snprintf(buf, sizeof(buf),
+           "\n"
+           "Automatically generated file; DO NOT EDIT.\n"
+           "%s\n",
+           rootmenu.prompt->text);
+
+       printer->print_comment(fp, buf, printer_arg);
+}
+
+/*
+ * Write out a minimal config.
+ * All values that has default values are skipped as this is redundant.
+ */
+int conf_write_defconfig(const char *filename)
+{
+       struct symbol *sym;
+       struct menu *menu;
+       FILE *out;
+
+       out = fopen(filename, "w");
+       if (!out)
+               return 1;
+
+       sym_clear_all_valid();
+
+       /* Traverse all menus to find all relevant symbols */
+       menu = rootmenu.list;
+
+       while (menu != NULL)
+       {
+               sym = menu->sym;
+               if (sym == NULL) {
+                       if (!menu_is_visible(menu))
+                               goto next_menu;
+               } else if (!sym_is_choice(sym)) {
+                       sym_calc_value(sym);
+                       if (!(sym->flags & SYMBOL_WRITE))
+                               goto next_menu;
+                       sym->flags &= ~SYMBOL_WRITE;
+                       /* If we cannot change the symbol - skip */
+                       if (!sym_is_changable(sym))
+                               goto next_menu;
+                       /* If symbol equals to default value - skip */
+                       if (strcmp(sym_get_string_value(sym), 
sym_get_string_default(sym)) == 0)
+                               goto next_menu;
+
+                       /*
+                        * If symbol is a choice value and equals to the
+                        * default for a choice - skip.
+                        * But only if value is bool and equal to "y" and
+                        * choice is not "optional".
+                        * (If choice is "optional" then all values can be "n")
+                        */
+                       if (sym_is_choice_value(sym)) {
+                               struct symbol *cs;
+                               struct symbol *ds;
+
+                               cs = prop_get_symbol(sym_get_choice_prop(sym));
+                               ds = sym_choice_default(cs);
+                               if (!sym_is_optional(cs) && sym == ds) {
+                                       if ((sym->type == S_BOOLEAN) &&
+                                           sym_get_tristate_value(sym) == yes)
+                                               goto next_menu;
+                               }
+                       }
+                       conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
+               }
+next_menu:
+               if (menu->list != NULL) {
+                       menu = menu->list;
+               }
+               else if (menu->next != NULL) {
+                       menu = menu->next;
+               } else {
+                       while ((menu = menu->parent)) {
+                               if (menu->next != NULL) {
+                                       menu = menu->next;
+                                       break;
+                               }
+                       }
+               }
+       }
+       fclose(out);
+       return 0;
+}
+
+int conf_write(const char *name)
+{
+       FILE *out;
+       struct symbol *sym;
+       struct menu *menu;
+       const char *basename;
+       const char *str;
+       char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
+       char *env;
+
+       dirname[0] = 0;
+       if (name && name[0]) {
+               struct stat st;
+               char *slash;
+
+               if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
+                       strcpy(dirname, name);
+                       strcat(dirname, "/");
+                       basename = conf_get_configname();
+               } else if ((slash = strrchr(name, '/'))) {
+                       int size = slash - name + 1;
+                       memcpy(dirname, name, size);
+                       dirname[size] = 0;
+                       if (slash[1])
+                               basename = slash + 1;
+                       else
+                               basename = conf_get_configname();
+               } else
+                       basename = name;
+       } else
+               basename = conf_get_configname();
+
+       sprintf(newname, "%s%s", dirname, basename);
+       env = getenv("KCONFIG_OVERWRITECONFIG");
+       if (!env || !*env) {
+               sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
+               out = fopen(tmpname, "w");
+       } else {
+               *tmpname = 0;
+               out = fopen(newname, "w");
+       }
+       if (!out)
+               return 1;
+
+       conf_write_heading(out, &kconfig_printer_cb, NULL);
+
+       if (!conf_get_changed())
+               sym_clear_all_valid();
+
+       menu = rootmenu.list;
+       while (menu) {
+               sym = menu->sym;
+               if (!sym) {
+                       if (!menu_is_visible(menu))
+                               goto next;
+                       str = menu_get_prompt(menu);
+                       fprintf(out, "\n"
+                                    "#\n"
+                                    "# %s\n"
+                                    "#\n", str);
+               } else if (!(sym->flags & SYMBOL_CHOICE)) {
+                       sym_calc_value(sym);
+                       if (!(sym->flags & SYMBOL_WRITE))
+                               goto next;
+                       sym->flags &= ~SYMBOL_WRITE;
+
+                       conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
+               }
+
+next:
+               if (menu->list) {
+                       menu = menu->list;
+                       continue;
+               }
+               if (menu->next)
+                       menu = menu->next;
+               else while ((menu = menu->parent)) {
+                       if (menu->next) {
+                               menu = menu->next;
+                               break;
+                       }
+               }
+       }
+       fclose(out);
+
+       if (*tmpname) {
+               strcat(dirname, basename);
+               strcat(dirname, ".old");
+               rename(newname, dirname);
+               if (rename(tmpname, newname))
+                       return 1;
+       }
+
+       conf_message(_("configuration written to %s"), newname);
+
+       sym_set_change_count(0);
+
+       return 0;
+}
+
+static int conf_split_config(void)
+{
+       const char *name;
+       char path[PATH_MAX+1];
+       char *s, *d, c;
+       struct symbol *sym;
+       struct stat sb;
+       int res, i, fd;
+
+       name = conf_get_autoconfig_name();
+       conf_read_simple(name, S_DEF_AUTO);
+
+       if (chdir("include/config"))
+               return 1;
+
+       res = 0;
+       for_all_symbols(i, sym) {
+               sym_calc_value(sym);
+               if ((sym->flags & SYMBOL_AUTO) || !sym->name)
+                       continue;
+               if (sym->flags & SYMBOL_WRITE) {
+                       if (sym->flags & SYMBOL_DEF_AUTO) {
+                               /*
+                                * symbol has old and new value,
+                                * so compare them...
+                                */
+                               switch (sym->type) {
+                               case S_BOOLEAN:
+                               case S_TRISTATE:
+                                       if (sym_get_tristate_value(sym) ==
+                                           sym->def[S_DEF_AUTO].tri)
+                                               continue;
+                                       break;
+                               case S_STRING:
+                               case S_HEX:
+                               case S_INT:
+                                       if (!strcmp(sym_get_string_value(sym),
+                                                   sym->def[S_DEF_AUTO].val))
+                                               continue;
+                                       break;
+                               default:
+                                       break;
+                               }
+                       } else {
+                               /*
+                                * If there is no old value, only 'no' (unset)
+                                * is allowed as new value.
+                                */
+                               switch (sym->type) {
+                               case S_BOOLEAN:
+                               case S_TRISTATE:
+                                       if (sym_get_tristate_value(sym) == no)
+                                               continue;
+                                       break;
+                               default:
+                                       break;
+                               }
+                       }
+               } else if (!(sym->flags & SYMBOL_DEF_AUTO))
+                       /* There is neither an old nor a new value. */
+                       continue;
+               /* else
+                *      There is an old value, but no new value ('no' (unset)
+                *      isn't saved in auto.conf, so the old value is always
+                *      different from 'no').
+                */
+
+               /* Replace all '_' and append ".h" */
+               s = sym->name;
+               d = path;
+               while ((c = *s++)) {
+                       c = tolower(c);
+                       *d++ = (c == '_') ? '/' : c;
+               }
+               strcpy(d, ".h");
+
+               /* Assume directory path already exists. */
+               fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
+               if (fd == -1) {
+                       if (errno != ENOENT) {
+                               res = 1;
+                               break;
+                       }
+                       /*
+                        * Create directory components,
+                        * unless they exist already.
+                        */
+                       d = path;
+                       while ((d = strchr(d, '/'))) {
+                               *d = 0;
+                               if (stat(path, &sb) && mkdir(path, 0755)) {
+                                       res = 1;
+                                       goto out;
+                               }
+                               *d++ = '/';
+                       }
+                       /* Try it again. */
+                       fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
+                       if (fd == -1) {
+                               res = 1;
+                               break;
+                       }
+               }
+               close(fd);
+       }
+out:
+       if (chdir("../.."))
+               return 1;
+
+       return res;
+}
+
+int conf_write_autoconf(void)
+{
+       struct symbol *sym;
+       const char *name;
+       FILE *out, *tristate, *out_h;
+       int i;
+
+       sym_clear_all_valid();
+
+       file_write_dep("include/config/auto.conf.cmd");
+
+       if (conf_split_config())
+               return 1;
+
+       out = fopen(".tmpconfig", "w");
+       if (!out)
+               return 1;
+
+       tristate = fopen(".tmpconfig_tristate", "w");
+       if (!tristate) {
+               fclose(out);
+               return 1;
+       }
+
+       out_h = fopen(".tmpconfig.h", "w");
+       if (!out_h) {
+               fclose(out);
+               fclose(tristate);
+               return 1;
+       }
+
+       conf_write_heading(out, &kconfig_printer_cb, NULL);
+
+       conf_write_heading(tristate, &tristate_printer_cb, NULL);
+
+       conf_write_heading(out_h, &header_printer_cb, NULL);
+
+       for_all_symbols(i, sym) {
+               sym_calc_value(sym);
+               if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
+                       continue;
+
+               /* write symbol to auto.conf, tristate and header files */
+               conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
+
+               conf_write_symbol(tristate, sym, &tristate_printer_cb, (void 
*)1);
+
+               conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
+       }
+       fclose(out);
+       fclose(tristate);
+       fclose(out_h);
+
+       name = getenv("KCONFIG_AUTOHEADER");
+       if (!name)
+               name = "include/generated/autoconf.h";
+       if (rename(".tmpconfig.h", name))
+               return 1;
+       name = getenv("KCONFIG_TRISTATE");
+       if (!name)
+               name = "include/config/tristate.conf";
+       if (rename(".tmpconfig_tristate", name))
+               return 1;
+       name = conf_get_autoconfig_name();
+       /*
+        * This must be the last step, kbuild has a dependency on auto.conf
+        * and this marks the successful completion of the previous steps.
+        */
+       if (rename(".tmpconfig", name))
+               return 1;
+
+       return 0;
+}
+
+static int sym_change_count;
+static void (*conf_changed_callback)(void);
+
+void sym_set_change_count(int count)
+{
+       int _sym_change_count = sym_change_count;
+       sym_change_count = count;
+       if (conf_changed_callback &&
+           (bool)_sym_change_count != (bool)count)
+               conf_changed_callback();
+}
+
+void sym_add_change_count(int count)
+{
+       sym_set_change_count(count + sym_change_count);
+}
+
+bool conf_get_changed(void)
+{
+       return sym_change_count;
+}
+
+void conf_set_changed_callback(void (*fn)(void))
+{
+       conf_changed_callback = fn;
+}
+
+static bool randomize_choice_values(struct symbol *csym)
+{
+       struct property *prop;
+       struct symbol *sym;
+       struct expr *e;
+       int cnt, def;
+
+       /*
+        * If choice is mod then we may have more items selected
+        * and if no then no-one.
+        * In both cases stop.
+        */
+       if (csym->curr.tri != yes)
+               return false;
+
+       prop = sym_get_choice_prop(csym);
+
+       /* count entries in choice block */
+       cnt = 0;
+       expr_list_for_each_sym(prop->expr, e, sym)
+               cnt++;
+
+       /*
+        * find a random value and set it to yes,
+        * set the rest to no so we have only one set
+        */
+       def = (rand() % cnt);
+
+       cnt = 0;
+       expr_list_for_each_sym(prop->expr, e, sym) {
+               if (def == cnt++) {
+                       sym->def[S_DEF_USER].tri = yes;
+                       csym->def[S_DEF_USER].val = sym;
+               }
+               else {
+                       sym->def[S_DEF_USER].tri = no;
+               }
+               sym->flags |= SYMBOL_DEF_USER;
+               /* clear VALID to get value calculated */
+               sym->flags &= ~SYMBOL_VALID;
+       }
+       csym->flags |= SYMBOL_DEF_USER;
+       /* clear VALID to get value calculated */
+       csym->flags &= ~(SYMBOL_VALID);
+
+       return true;
+}
+
+void set_all_choice_values(struct symbol *csym)
+{
+       struct property *prop;
+       struct symbol *sym;
+       struct expr *e;
+
+       prop = sym_get_choice_prop(csym);
+
+       /*
+        * Set all non-assinged choice values to no
+        */
+       expr_list_for_each_sym(prop->expr, e, sym) {
+               if (!sym_has_value(sym))
+                       sym->def[S_DEF_USER].tri = no;
+       }
+       csym->flags |= SYMBOL_DEF_USER;
+       /* clear VALID to get value calculated */
+       csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
+}
+
+bool conf_set_all_new_symbols(enum conf_def_mode mode)
+{
+       struct symbol *sym, *csym;
+       int i, cnt, pby, pty, ptm;      /* pby: probability of boolean  = y
+                                        * pty: probability of tristate = y
+                                        * ptm: probability of tristate = m
+                                        */
+
+       pby = 50; pty = ptm = 33; /* can't go as the default in switch-case
+                                  * below, otherwise gcc whines about
+                                  * -Wmaybe-uninitialized */
+       if (mode == def_random) {
+               int n, p[3];
+               char *env = getenv("KCONFIG_PROBABILITY");
+               n = 0;
+               while( env && *env ) {
+                       char *endp;
+                       int tmp = strtol( env, &endp, 10 );
+                       if( tmp >= 0 && tmp <= 100 ) {
+                               p[n++] = tmp;
+                       } else {
+                               errno = ERANGE;
+                               perror( "KCONFIG_PROBABILITY" );
+                               exit( 1 );
+                       }
+                       env = (*endp == ':') ? endp+1 : endp;
+                       if( n >=3 ) {
+                               break;
+                       }
+               }
+               switch( n ) {
+               case 1:
+                       pby = p[0]; ptm = pby/2; pty = pby-ptm;
+                       break;
+               case 2:
+                       pty = p[0]; ptm = p[1]; pby = pty + ptm;
+                       break;
+               case 3:
+                       pby = p[0]; pty = p[1]; ptm = p[2];
+                       break;
+               }
+
+               if( pty+ptm > 100 ) {
+                       errno = ERANGE;
+                       perror( "KCONFIG_PROBABILITY" );
+                       exit( 1 );
+               }
+       }
+       bool has_changed = false;
+
+       for_all_symbols(i, sym) {
+               if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID))
+                       continue;
+               switch (sym_get_type(sym)) {
+               case S_BOOLEAN:
+               case S_TRISTATE:
+                       has_changed = true;
+                       switch (mode) {
+                       case def_yes:
+                               sym->def[S_DEF_USER].tri = yes;
+                               break;
+                       case def_mod:
+                               sym->def[S_DEF_USER].tri = mod;
+                               break;
+                       case def_no:
+                               if (sym->flags & SYMBOL_ALLNOCONFIG_Y)
+                                       sym->def[S_DEF_USER].tri = yes;
+                               else
+                                       sym->def[S_DEF_USER].tri = no;
+                               break;
+                       case def_random:
+                               sym->def[S_DEF_USER].tri = no;
+                               cnt = rand() % 100;
+                               if (sym->type == S_TRISTATE) {
+                                       if (cnt < pty)
+                                               sym->def[S_DEF_USER].tri = yes;
+                                       else if (cnt < (pty+ptm))
+                                               sym->def[S_DEF_USER].tri = mod;
+                               } else if (cnt < pby)
+                                       sym->def[S_DEF_USER].tri = yes;
+                               break;
+                       default:
+                               continue;
+                       }
+                       if (!(sym_is_choice(sym) && mode == def_random))
+                               sym->flags |= SYMBOL_DEF_USER;
+                       break;
+               default:
+                       break;
+               }
+
+       }
+
+       sym_clear_all_valid();
+
+       /*
+        * We have different type of choice blocks.
+        * If curr.tri equals to mod then we can select several
+        * choice symbols in one block.
+        * In this case we do nothing.
+        * If curr.tri equals yes then only one symbol can be
+        * selected in a choice block and we set it to yes,
+        * and the rest to no.
+        */
+       if (mode != def_random) {
+               for_all_symbols(i, csym) {
+                       if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
+                           sym_is_choice_value(csym))
+                               csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
+               }
+       }
+
+       for_all_symbols(i, csym) {
+               if (sym_has_value(csym) || !sym_is_choice(csym))
+                       continue;
+
+               sym_calc_value(csym);
+               if (mode == def_random)
+                       has_changed = randomize_choice_values(csym);
+               else {
+                       set_all_choice_values(csym);
+                       has_changed = true;
+               }
+       }
+
+       return has_changed;
+}
diff --git a/xen/tools/kconfig/expr.c b/xen/tools/kconfig/expr.c
new file mode 100644
index 0000000..667d1aa
--- /dev/null
+++ b/xen/tools/kconfig/expr.c
@@ -0,0 +1,1206 @@
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@xxxxxxxxxxxxxx>
+ * Released under the terms of the GNU GPL v2.0.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lkc.h"
+
+#define DEBUG_EXPR     0
+
+static int expr_eq(struct expr *e1, struct expr *e2);
+static struct expr *expr_eliminate_yn(struct expr *e);
+
+struct expr *expr_alloc_symbol(struct symbol *sym)
+{
+       struct expr *e = xcalloc(1, sizeof(*e));
+       e->type = E_SYMBOL;
+       e->left.sym = sym;
+       return e;
+}
+
+struct expr *expr_alloc_one(enum expr_type type, struct expr *ce)
+{
+       struct expr *e = xcalloc(1, sizeof(*e));
+       e->type = type;
+       e->left.expr = ce;
+       return e;
+}
+
+struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr 
*e2)
+{
+       struct expr *e = xcalloc(1, sizeof(*e));
+       e->type = type;
+       e->left.expr = e1;
+       e->right.expr = e2;
+       return e;
+}
+
+struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct 
symbol *s2)
+{
+       struct expr *e = xcalloc(1, sizeof(*e));
+       e->type = type;
+       e->left.sym = s1;
+       e->right.sym = s2;
+       return e;
+}
+
+struct expr *expr_alloc_and(struct expr *e1, struct expr *e2)
+{
+       if (!e1)
+               return e2;
+       return e2 ? expr_alloc_two(E_AND, e1, e2) : e1;
+}
+
+struct expr *expr_alloc_or(struct expr *e1, struct expr *e2)
+{
+       if (!e1)
+               return e2;
+       return e2 ? expr_alloc_two(E_OR, e1, e2) : e1;
+}
+
+struct expr *expr_copy(const struct expr *org)
+{
+       struct expr *e;
+
+       if (!org)
+               return NULL;
+
+       e = xmalloc(sizeof(*org));
+       memcpy(e, org, sizeof(*org));
+       switch (org->type) {
+       case E_SYMBOL:
+               e->left = org->left;
+               break;
+       case E_NOT:
+               e->left.expr = expr_copy(org->left.expr);
+               break;
+       case E_EQUAL:
+       case E_GEQ:
+       case E_GTH:
+       case E_LEQ:
+       case E_LTH:
+       case E_UNEQUAL:
+               e->left.sym = org->left.sym;
+               e->right.sym = org->right.sym;
+               break;
+       case E_AND:
+       case E_OR:
+       case E_LIST:
+               e->left.expr = expr_copy(org->left.expr);
+               e->right.expr = expr_copy(org->right.expr);
+               break;
+       default:
+               printf("can't copy type %d\n", e->type);
+               free(e);
+               e = NULL;
+               break;
+       }
+
+       return e;
+}
+
+void expr_free(struct expr *e)
+{
+       if (!e)
+               return;
+
+       switch (e->type) {
+       case E_SYMBOL:
+               break;
+       case E_NOT:
+               expr_free(e->left.expr);
+               return;
+       case E_EQUAL:
+       case E_GEQ:
+       case E_GTH:
+       case E_LEQ:
+       case E_LTH:
+       case E_UNEQUAL:
+               break;
+       case E_OR:
+       case E_AND:
+               expr_free(e->left.expr);
+               expr_free(e->right.expr);
+               break;
+       default:
+               printf("how to free type %d?\n", e->type);
+               break;
+       }
+       free(e);
+}
+
+static int trans_count;
+
+#define e1 (*ep1)
+#define e2 (*ep2)
+
+static void __expr_eliminate_eq(enum expr_type type, struct expr **ep1, struct 
expr **ep2)
+{
+       if (e1->type == type) {
+               __expr_eliminate_eq(type, &e1->left.expr, &e2);
+               __expr_eliminate_eq(type, &e1->right.expr, &e2);
+               return;
+       }
+       if (e2->type == type) {
+               __expr_eliminate_eq(type, &e1, &e2->left.expr);
+               __expr_eliminate_eq(type, &e1, &e2->right.expr);
+               return;
+       }
+       if (e1->type == E_SYMBOL && e2->type == E_SYMBOL &&
+           e1->left.sym == e2->left.sym &&
+           (e1->left.sym == &symbol_yes || e1->left.sym == &symbol_no))
+               return;
+       if (!expr_eq(e1, e2))
+               return;
+       trans_count++;
+       expr_free(e1); expr_free(e2);
+       switch (type) {
+       case E_OR:
+               e1 = expr_alloc_symbol(&symbol_no);
+               e2 = expr_alloc_symbol(&symbol_no);
+               break;
+       case E_AND:
+               e1 = expr_alloc_symbol(&symbol_yes);
+               e2 = expr_alloc_symbol(&symbol_yes);
+               break;
+       default:
+               ;
+       }
+}
+
+void expr_eliminate_eq(struct expr **ep1, struct expr **ep2)
+{
+       if (!e1 || !e2)
+               return;
+       switch (e1->type) {
+       case E_OR:
+       case E_AND:
+               __expr_eliminate_eq(e1->type, ep1, ep2);
+       default:
+               ;
+       }
+       if (e1->type != e2->type) switch (e2->type) {
+       case E_OR:
+       case E_AND:
+               __expr_eliminate_eq(e2->type, ep1, ep2);
+       default:
+               ;
+       }
+       e1 = expr_eliminate_yn(e1);
+       e2 = expr_eliminate_yn(e2);
+}
+
+#undef e1
+#undef e2
+
+static int expr_eq(struct expr *e1, struct expr *e2)
+{
+       int res, old_count;
+
+       if (e1->type != e2->type)
+               return 0;
+       switch (e1->type) {
+       case E_EQUAL:
+       case E_GEQ:
+       case E_GTH:
+       case E_LEQ:
+       case E_LTH:
+       case E_UNEQUAL:
+               return e1->left.sym == e2->left.sym && e1->right.sym == 
e2->right.sym;
+       case E_SYMBOL:
+               return e1->left.sym == e2->left.sym;
+       case E_NOT:
+               return expr_eq(e1->left.expr, e2->left.expr);
+       case E_AND:
+       case E_OR:
+               e1 = expr_copy(e1);
+               e2 = expr_copy(e2);
+               old_count = trans_count;
+               expr_eliminate_eq(&e1, &e2);
+               res = (e1->type == E_SYMBOL && e2->type == E_SYMBOL &&
+                      e1->left.sym == e2->left.sym);
+               expr_free(e1);
+               expr_free(e2);
+               trans_count = old_count;
+               return res;
+       case E_LIST:
+       case E_RANGE:
+       case E_NONE:
+               /* panic */;
+       }
+
+       if (DEBUG_EXPR) {
+               expr_fprint(e1, stdout);
+               printf(" = ");
+               expr_fprint(e2, stdout);
+               printf(" ?\n");
+       }
+
+       return 0;
+}
+
+static struct expr *expr_eliminate_yn(struct expr *e)
+{
+       struct expr *tmp;
+
+       if (e) switch (e->type) {
+       case E_AND:
+               e->left.expr = expr_eliminate_yn(e->left.expr);
+               e->right.expr = expr_eliminate_yn(e->right.expr);
+               if (e->left.expr->type == E_SYMBOL) {
+                       if (e->left.expr->left.sym == &symbol_no) {
+                               expr_free(e->left.expr);
+                               expr_free(e->right.expr);
+                               e->type = E_SYMBOL;
+                               e->left.sym = &symbol_no;
+                               e->right.expr = NULL;
+                               return e;
+                       } else if (e->left.expr->left.sym == &symbol_yes) {
+                               free(e->left.expr);
+                               tmp = e->right.expr;
+                               *e = *(e->right.expr);
+                               free(tmp);
+                               return e;
+                       }
+               }
+               if (e->right.expr->type == E_SYMBOL) {
+                       if (e->right.expr->left.sym == &symbol_no) {
+                               expr_free(e->left.expr);
+                               expr_free(e->right.expr);
+                               e->type = E_SYMBOL;
+                               e->left.sym = &symbol_no;
+                               e->right.expr = NULL;
+                               return e;
+                       } else if (e->right.expr->left.sym == &symbol_yes) {
+                               free(e->right.expr);
+                               tmp = e->left.expr;
+                               *e = *(e->left.expr);
+                               free(tmp);
+                               return e;
+                       }
+               }
+               break;
+       case E_OR:
+               e->left.expr = expr_eliminate_yn(e->left.expr);
+               e->right.expr = expr_eliminate_yn(e->right.expr);
+               if (e->left.expr->type == E_SYMBOL) {
+                       if (e->left.expr->left.sym == &symbol_no) {
+                               free(e->left.expr);
+                               tmp = e->right.expr;
+                               *e = *(e->right.expr);
+                               free(tmp);
+                               return e;
+                       } else if (e->left.expr->left.sym == &symbol_yes) {
+                               expr_free(e->left.expr);
+                               expr_free(e->right.expr);
+                               e->type = E_SYMBOL;
+                               e->left.sym = &symbol_yes;
+                               e->right.expr = NULL;
+                               return e;
+                       }
+               }
+               if (e->right.expr->type == E_SYMBOL) {
+                       if (e->right.expr->left.sym == &symbol_no) {
+                               free(e->right.expr);
+                               tmp = e->left.expr;
+                               *e = *(e->left.expr);
+                               free(tmp);
+                               return e;
+                       } else if (e->right.expr->left.sym == &symbol_yes) {
+                               expr_free(e->left.expr);
+                               expr_free(e->right.expr);
+                               e->type = E_SYMBOL;
+                               e->left.sym = &symbol_yes;
+                               e->right.expr = NULL;
+                               return e;
+                       }
+               }
+               break;
+       default:
+               ;
+       }
+       return e;
+}
+
+/*
+ * bool FOO!=n => FOO
+ */
+struct expr *expr_trans_bool(struct expr *e)
+{
+       if (!e)
+               return NULL;
+       switch (e->type) {
+       case E_AND:
+       case E_OR:
+       case E_NOT:
+               e->left.expr = expr_trans_bool(e->left.expr);
+               e->right.expr = expr_trans_bool(e->right.expr);
+               break;
+       case E_UNEQUAL:
+               // FOO!=n -> FOO
+               if (e->left.sym->type == S_TRISTATE) {
+                       if (e->right.sym == &symbol_no) {
+                               e->type = E_SYMBOL;
+                               e->right.sym = NULL;
+                       }
+               }
+               break;
+       default:
+               ;
+       }
+       return e;
+}
+
+/*
+ * e1 || e2 -> ?
+ */
+static struct expr *expr_join_or(struct expr *e1, struct expr *e2)
+{
+       struct expr *tmp;
+       struct symbol *sym1, *sym2;
+
+       if (expr_eq(e1, e2))
+               return expr_copy(e1);
+       if (e1->type != E_EQUAL && e1->type != E_UNEQUAL && e1->type != 
E_SYMBOL && e1->type != E_NOT)
+               return NULL;
+       if (e2->type != E_EQUAL && e2->type != E_UNEQUAL && e2->type != 
E_SYMBOL && e2->type != E_NOT)
+               return NULL;
+       if (e1->type == E_NOT) {
+               tmp = e1->left.expr;
+               if (tmp->type != E_EQUAL && tmp->type != E_UNEQUAL && tmp->type 
!= E_SYMBOL)
+                       return NULL;
+               sym1 = tmp->left.sym;
+       } else
+               sym1 = e1->left.sym;
+       if (e2->type == E_NOT) {
+               if (e2->left.expr->type != E_SYMBOL)
+                       return NULL;
+               sym2 = e2->left.expr->left.sym;
+       } else
+               sym2 = e2->left.sym;
+       if (sym1 != sym2)
+               return NULL;
+       if (sym1->type != S_BOOLEAN && sym1->type != S_TRISTATE)
+               return NULL;
+       if (sym1->type == S_TRISTATE) {
+               if (e1->type == E_EQUAL && e2->type == E_EQUAL &&
+                   ((e1->right.sym == &symbol_yes && e2->right.sym == 
&symbol_mod) ||
+                    (e1->right.sym == &symbol_mod && e2->right.sym == 
&symbol_yes))) {
+                       // (a='y') || (a='m') -> (a!='n')
+                       return expr_alloc_comp(E_UNEQUAL, sym1, &symbol_no);
+               }
+               if (e1->type == E_EQUAL && e2->type == E_EQUAL &&
+                   ((e1->right.sym == &symbol_yes && e2->right.sym == 
&symbol_no) ||
+                    (e1->right.sym == &symbol_no && e2->right.sym == 
&symbol_yes))) {
+                       // (a='y') || (a='n') -> (a!='m')
+                       return expr_alloc_comp(E_UNEQUAL, sym1, &symbol_mod);
+               }
+               if (e1->type == E_EQUAL && e2->type == E_EQUAL &&
+                   ((e1->right.sym == &symbol_mod && e2->right.sym == 
&symbol_no) ||
+                    (e1->right.sym == &symbol_no && e2->right.sym == 
&symbol_mod))) {
+                       // (a='m') || (a='n') -> (a!='y')
+                       return expr_alloc_comp(E_UNEQUAL, sym1, &symbol_yes);
+               }
+       }
+       if (sym1->type == S_BOOLEAN && sym1 == sym2) {
+               if ((e1->type == E_NOT && e1->left.expr->type == E_SYMBOL && 
e2->type == E_SYMBOL) ||
+                   (e2->type == E_NOT && e2->left.expr->type == E_SYMBOL && 
e1->type == E_SYMBOL))
+                       return expr_alloc_symbol(&symbol_yes);
+       }
+
+       if (DEBUG_EXPR) {
+               printf("optimize (");
+               expr_fprint(e1, stdout);
+               printf(") || (");
+               expr_fprint(e2, stdout);
+               printf(")?\n");
+       }
+       return NULL;
+}
+
+static struct expr *expr_join_and(struct expr *e1, struct expr *e2)
+{
+       struct expr *tmp;
+       struct symbol *sym1, *sym2;
+
+       if (expr_eq(e1, e2))
+               return expr_copy(e1);
+       if (e1->type != E_EQUAL && e1->type != E_UNEQUAL && e1->type != 
E_SYMBOL && e1->type != E_NOT)
+               return NULL;
+       if (e2->type != E_EQUAL && e2->type != E_UNEQUAL && e2->type != 
E_SYMBOL && e2->type != E_NOT)
+               return NULL;
+       if (e1->type == E_NOT) {
+               tmp = e1->left.expr;
+               if (tmp->type != E_EQUAL && tmp->type != E_UNEQUAL && tmp->type 
!= E_SYMBOL)
+                       return NULL;
+               sym1 = tmp->left.sym;
+       } else
+               sym1 = e1->left.sym;
+       if (e2->type == E_NOT) {
+               if (e2->left.expr->type != E_SYMBOL)
+                       return NULL;
+               sym2 = e2->left.expr->left.sym;
+       } else
+               sym2 = e2->left.sym;
+       if (sym1 != sym2)
+               return NULL;
+       if (sym1->type != S_BOOLEAN && sym1->type != S_TRISTATE)
+               return NULL;
+
+       if ((e1->type == E_SYMBOL && e2->type == E_EQUAL && e2->right.sym == 
&symbol_yes) ||
+           (e2->type == E_SYMBOL && e1->type == E_EQUAL && e1->right.sym == 
&symbol_yes))
+               // (a) && (a='y') -> (a='y')
+               return expr_alloc_comp(E_EQUAL, sym1, &symbol_yes);
+
+       if ((e1->type == E_SYMBOL && e2->type == E_UNEQUAL && e2->right.sym == 
&symbol_no) ||
+           (e2->type == E_SYMBOL && e1->type == E_UNEQUAL && e1->right.sym == 
&symbol_no))
+               // (a) && (a!='n') -> (a)
+               return expr_alloc_symbol(sym1);
+
+       if ((e1->type == E_SYMBOL && e2->type == E_UNEQUAL && e2->right.sym == 
&symbol_mod) ||
+           (e2->type == E_SYMBOL && e1->type == E_UNEQUAL && e1->right.sym == 
&symbol_mod))
+               // (a) && (a!='m') -> (a='y')
+               return expr_alloc_comp(E_EQUAL, sym1, &symbol_yes);
+
+       if (sym1->type == S_TRISTATE) {
+               if (e1->type == E_EQUAL && e2->type == E_UNEQUAL) {
+                       // (a='b') && (a!='c') -> 'b'='c' ? 'n' : a='b'
+                       sym2 = e1->right.sym;
+                       if ((e2->right.sym->flags & SYMBOL_CONST) && 
(sym2->flags & SYMBOL_CONST))
+                               return sym2 != e2->right.sym ? 
expr_alloc_comp(E_EQUAL, sym1, sym2)
+                                                            : 
expr_alloc_symbol(&symbol_no);
+               }
+               if (e1->type == E_UNEQUAL && e2->type == E_EQUAL) {
+                       // (a='b') && (a!='c') -> 'b'='c' ? 'n' : a='b'
+                       sym2 = e2->right.sym;
+                       if ((e1->right.sym->flags & SYMBOL_CONST) && 
(sym2->flags & SYMBOL_CONST))
+                               return sym2 != e1->right.sym ? 
expr_alloc_comp(E_EQUAL, sym1, sym2)
+                                                            : 
expr_alloc_symbol(&symbol_no);
+               }
+               if (e1->type == E_UNEQUAL && e2->type == E_UNEQUAL &&
+                          ((e1->right.sym == &symbol_yes && e2->right.sym == 
&symbol_no) ||
+                           (e1->right.sym == &symbol_no && e2->right.sym == 
&symbol_yes)))
+                       // (a!='y') && (a!='n') -> (a='m')
+                       return expr_alloc_comp(E_EQUAL, sym1, &symbol_mod);
+
+               if (e1->type == E_UNEQUAL && e2->type == E_UNEQUAL &&
+                          ((e1->right.sym == &symbol_yes && e2->right.sym == 
&symbol_mod) ||
+                           (e1->right.sym == &symbol_mod && e2->right.sym == 
&symbol_yes)))
+                       // (a!='y') && (a!='m') -> (a='n')
+                       return expr_alloc_comp(E_EQUAL, sym1, &symbol_no);
+
+               if (e1->type == E_UNEQUAL && e2->type == E_UNEQUAL &&
+                          ((e1->right.sym == &symbol_mod && e2->right.sym == 
&symbol_no) ||
+                           (e1->right.sym == &symbol_no && e2->right.sym == 
&symbol_mod)))
+                       // (a!='m') && (a!='n') -> (a='m')
+                       return expr_alloc_comp(E_EQUAL, sym1, &symbol_yes);
+
+               if ((e1->type == E_SYMBOL && e2->type == E_EQUAL && 
e2->right.sym == &symbol_mod) ||
+                   (e2->type == E_SYMBOL && e1->type == E_EQUAL && 
e1->right.sym == &symbol_mod) ||
+                   (e1->type == E_SYMBOL && e2->type == E_UNEQUAL && 
e2->right.sym == &symbol_yes) ||
+                   (e2->type == E_SYMBOL && e1->type == E_UNEQUAL && 
e1->right.sym == &symbol_yes))
+                       return NULL;
+       }
+
+       if (DEBUG_EXPR) {
+               printf("optimize (");
+               expr_fprint(e1, stdout);
+               printf(") && (");
+               expr_fprint(e2, stdout);
+               printf(")?\n");
+       }
+       return NULL;
+}
+
+static void expr_eliminate_dups1(enum expr_type type, struct expr **ep1, 
struct expr **ep2)
+{
+#define e1 (*ep1)
+#define e2 (*ep2)
+       struct expr *tmp;
+
+       if (e1->type == type) {
+               expr_eliminate_dups1(type, &e1->left.expr, &e2);
+               expr_eliminate_dups1(type, &e1->right.expr, &e2);
+               return;
+       }
+       if (e2->type == type) {
+               expr_eliminate_dups1(type, &e1, &e2->left.expr);
+               expr_eliminate_dups1(type, &e1, &e2->right.expr);
+               return;
+       }
+       if (e1 == e2)
+               return;
+
+       switch (e1->type) {
+       case E_OR: case E_AND:
+               expr_eliminate_dups1(e1->type, &e1, &e1);
+       default:
+               ;
+       }
+
+       switch (type) {
+       case E_OR:
+               tmp = expr_join_or(e1, e2);
+               if (tmp) {
+                       expr_free(e1); expr_free(e2);
+                       e1 = expr_alloc_symbol(&symbol_no);
+                       e2 = tmp;
+                       trans_count++;
+               }
+               break;
+       case E_AND:
+               tmp = expr_join_and(e1, e2);
+               if (tmp) {
+                       expr_free(e1); expr_free(e2);
+                       e1 = expr_alloc_symbol(&symbol_yes);
+                       e2 = tmp;
+                       trans_count++;
+               }
+               break;
+       default:
+               ;
+       }
+#undef e1
+#undef e2
+}
+
+struct expr *expr_eliminate_dups(struct expr *e)
+{
+       int oldcount;
+       if (!e)
+               return e;
+
+       oldcount = trans_count;
+       while (1) {
+               trans_count = 0;
+               switch (e->type) {
+               case E_OR: case E_AND:
+                       expr_eliminate_dups1(e->type, &e, &e);
+               default:
+                       ;
+               }
+               if (!trans_count)
+                       break;
+               e = expr_eliminate_yn(e);
+       }
+       trans_count = oldcount;
+       return e;
+}
+
+struct expr *expr_transform(struct expr *e)
+{
+       struct expr *tmp;
+
+       if (!e)
+               return NULL;
+       switch (e->type) {
+       case E_EQUAL:
+       case E_GEQ:
+       case E_GTH:
+       case E_LEQ:
+       case E_LTH:
+       case E_UNEQUAL:
+       case E_SYMBOL:
+       case E_LIST:
+               break;
+       default:
+               e->left.expr = expr_transform(e->left.expr);
+               e->right.expr = expr_transform(e->right.expr);
+       }
+
+       switch (e->type) {
+       case E_EQUAL:
+               if (e->left.sym->type != S_BOOLEAN)
+                       break;
+               if (e->right.sym == &symbol_no) {
+                       e->type = E_NOT;
+                       e->left.expr = expr_alloc_symbol(e->left.sym);
+                       e->right.sym = NULL;
+                       break;
+               }
+               if (e->right.sym == &symbol_mod) {
+                       printf("boolean symbol %s tested for 'm'? test forced 
to 'n'\n", e->left.sym->name);
+                       e->type = E_SYMBOL;
+                       e->left.sym = &symbol_no;
+                       e->right.sym = NULL;
+                       break;
+               }
+               if (e->right.sym == &symbol_yes) {
+                       e->type = E_SYMBOL;
+                       e->right.sym = NULL;
+                       break;
+               }
+               break;
+       case E_UNEQUAL:
+               if (e->left.sym->type != S_BOOLEAN)
+                       break;
+               if (e->right.sym == &symbol_no) {
+                       e->type = E_SYMBOL;
+                       e->right.sym = NULL;
+                       break;
+               }
+               if (e->right.sym == &symbol_mod) {
+                       printf("boolean symbol %s tested for 'm'? test forced 
to 'y'\n", e->left.sym->name);
+                       e->type = E_SYMBOL;
+                       e->left.sym = &symbol_yes;
+                       e->right.sym = NULL;
+                       break;
+               }
+               if (e->right.sym == &symbol_yes) {
+                       e->type = E_NOT;
+                       e->left.expr = expr_alloc_symbol(e->left.sym);
+                       e->right.sym = NULL;
+                       break;
+               }
+               break;
+       case E_NOT:
+               switch (e->left.expr->type) {
+               case E_NOT:
+                       // !!a -> a
+                       tmp = e->left.expr->left.expr;
+                       free(e->left.expr);
+                       free(e);
+                       e = tmp;
+                       e = expr_transform(e);
+                       break;
+               case E_EQUAL:
+               case E_UNEQUAL:
+                       // !a='x' -> a!='x'
+                       tmp = e->left.expr;
+                       free(e);
+                       e = tmp;
+                       e->type = e->type == E_EQUAL ? E_UNEQUAL : E_EQUAL;
+                       break;
+               case E_LEQ:
+               case E_GEQ:
+                       // !a<='x' -> a>'x'
+                       tmp = e->left.expr;
+                       free(e);
+                       e = tmp;
+                       e->type = e->type == E_LEQ ? E_GTH : E_LTH;
+                       break;
+               case E_LTH:
+               case E_GTH:
+                       // !a<'x' -> a>='x'
+                       tmp = e->left.expr;
+                       free(e);
+                       e = tmp;
+                       e->type = e->type == E_LTH ? E_GEQ : E_LEQ;
+                       break;
+               case E_OR:
+                       // !(a || b) -> !a && !b
+                       tmp = e->left.expr;
+                       e->type = E_AND;
+                       e->right.expr = expr_alloc_one(E_NOT, tmp->right.expr);
+                       tmp->type = E_NOT;
+                       tmp->right.expr = NULL;
+                       e = expr_transform(e);
+                       break;
+               case E_AND:
+                       // !(a && b) -> !a || !b
+                       tmp = e->left.expr;
+                       e->type = E_OR;
+                       e->right.expr = expr_alloc_one(E_NOT, tmp->right.expr);
+                       tmp->type = E_NOT;
+                       tmp->right.expr = NULL;
+                       e = expr_transform(e);
+                       break;
+               case E_SYMBOL:
+                       if (e->left.expr->left.sym == &symbol_yes) {
+                               // !'y' -> 'n'
+                               tmp = e->left.expr;
+                               free(e);
+                               e = tmp;
+                               e->type = E_SYMBOL;
+                               e->left.sym = &symbol_no;
+                               break;
+                       }
+                       if (e->left.expr->left.sym == &symbol_mod) {
+                               // !'m' -> 'm'
+                               tmp = e->left.expr;
+                               free(e);
+                               e = tmp;
+                               e->type = E_SYMBOL;
+                               e->left.sym = &symbol_mod;
+                               break;
+                       }
+                       if (e->left.expr->left.sym == &symbol_no) {
+                               // !'n' -> 'y'
+                               tmp = e->left.expr;
+                               free(e);
+                               e = tmp;
+                               e->type = E_SYMBOL;
+                               e->left.sym = &symbol_yes;
+                               break;
+                       }
+                       break;
+               default:
+                       ;
+               }
+               break;
+       default:
+               ;
+       }
+       return e;
+}
+
+int expr_contains_symbol(struct expr *dep, struct symbol *sym)
+{
+       if (!dep)
+               return 0;
+
+       switch (dep->type) {
+       case E_AND:
+       case E_OR:
+               return expr_contains_symbol(dep->left.expr, sym) ||
+                      expr_contains_symbol(dep->right.expr, sym);
+       case E_SYMBOL:
+               return dep->left.sym == sym;
+       case E_EQUAL:
+       case E_GEQ:
+       case E_GTH:
+       case E_LEQ:
+       case E_LTH:
+       case E_UNEQUAL:
+               return dep->left.sym == sym ||
+                      dep->right.sym == sym;
+       case E_NOT:
+               return expr_contains_symbol(dep->left.expr, sym);
+       default:
+               ;
+       }
+       return 0;
+}
+
+bool expr_depends_symbol(struct expr *dep, struct symbol *sym)
+{
+       if (!dep)
+               return false;
+
+       switch (dep->type) {
+       case E_AND:
+               return expr_depends_symbol(dep->left.expr, sym) ||
+                      expr_depends_symbol(dep->right.expr, sym);
+       case E_SYMBOL:
+               return dep->left.sym == sym;
+       case E_EQUAL:
+               if (dep->left.sym == sym) {
+                       if (dep->right.sym == &symbol_yes || dep->right.sym == 
&symbol_mod)
+                               return true;
+               }
+               break;
+       case E_UNEQUAL:
+               if (dep->left.sym == sym) {
+                       if (dep->right.sym == &symbol_no)
+                               return true;
+               }
+               break;
+       default:
+               ;
+       }
+       return false;
+}
+
+struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct 
symbol *sym)
+{
+       struct expr *e1, *e2;
+
+       if (!e) {
+               e = expr_alloc_symbol(sym);
+               if (type == E_UNEQUAL)
+                       e = expr_alloc_one(E_NOT, e);
+               return e;
+       }
+       switch (e->type) {
+       case E_AND:
+               e1 = expr_trans_compare(e->left.expr, E_EQUAL, sym);
+               e2 = expr_trans_compare(e->right.expr, E_EQUAL, sym);
+               if (sym == &symbol_yes)
+                       e = expr_alloc_two(E_AND, e1, e2);
+               if (sym == &symbol_no)
+                       e = expr_alloc_two(E_OR, e1, e2);
+               if (type == E_UNEQUAL)
+                       e = expr_alloc_one(E_NOT, e);
+               return e;
+       case E_OR:
+               e1 = expr_trans_compare(e->left.expr, E_EQUAL, sym);
+               e2 = expr_trans_compare(e->right.expr, E_EQUAL, sym);
+               if (sym == &symbol_yes)
+                       e = expr_alloc_two(E_OR, e1, e2);
+               if (sym == &symbol_no)
+                       e = expr_alloc_two(E_AND, e1, e2);
+               if (type == E_UNEQUAL)
+                       e = expr_alloc_one(E_NOT, e);
+               return e;
+       case E_NOT:
+               return expr_trans_compare(e->left.expr, type == E_EQUAL ? 
E_UNEQUAL : E_EQUAL, sym);
+       case E_UNEQUAL:
+       case E_LTH:
+       case E_LEQ:
+       case E_GTH:
+       case E_GEQ:
+       case E_EQUAL:
+               if (type == E_EQUAL) {
+                       if (sym == &symbol_yes)
+                               return expr_copy(e);
+                       if (sym == &symbol_mod)
+                               return expr_alloc_symbol(&symbol_no);
+                       if (sym == &symbol_no)
+                               return expr_alloc_one(E_NOT, expr_copy(e));
+               } else {
+                       if (sym == &symbol_yes)
+                               return expr_alloc_one(E_NOT, expr_copy(e));
+                       if (sym == &symbol_mod)
+                               return expr_alloc_symbol(&symbol_yes);
+                       if (sym == &symbol_no)
+                               return expr_copy(e);
+               }
+               break;
+       case E_SYMBOL:
+               return expr_alloc_comp(type, e->left.sym, sym);
+       case E_LIST:
+       case E_RANGE:
+       case E_NONE:
+               /* panic */;
+       }
+       return NULL;
+}
+
+enum string_value_kind {
+       k_string,
+       k_signed,
+       k_unsigned,
+       k_invalid
+};
+
+union string_value {
+       unsigned long long u;
+       signed long long s;
+};
+
+static enum string_value_kind expr_parse_string(const char *str,
+                                               enum symbol_type type,
+                                               union string_value *val)
+{
+       char *tail;
+       enum string_value_kind kind;
+
+       errno = 0;
+       switch (type) {
+       case S_BOOLEAN:
+       case S_TRISTATE:
+               return k_string;
+       case S_INT:
+               val->s = strtoll(str, &tail, 10);
+               kind = k_signed;
+               break;
+       case S_HEX:
+               val->u = strtoull(str, &tail, 16);
+               kind = k_unsigned;
+               break;
+       case S_STRING:
+       case S_UNKNOWN:
+               val->s = strtoll(str, &tail, 0);
+               kind = k_signed;
+               break;
+       default:
+               return k_invalid;
+       }
+       return !errno && !*tail && tail > str && isxdigit(tail[-1])
+              ? kind : k_string;
+}
+
+tristate expr_calc_value(struct expr *e)
+{
+       tristate val1, val2;
+       const char *str1, *str2;
+       enum string_value_kind k1 = k_string, k2 = k_string;
+       union string_value lval = {}, rval = {};
+       int res;
+
+       if (!e)
+               return yes;
+
+       switch (e->type) {
+       case E_SYMBOL:
+               sym_calc_value(e->left.sym);
+               return e->left.sym->curr.tri;
+       case E_AND:
+               val1 = expr_calc_value(e->left.expr);
+               val2 = expr_calc_value(e->right.expr);
+               return EXPR_AND(val1, val2);
+       case E_OR:
+               val1 = expr_calc_value(e->left.expr);
+               val2 = expr_calc_value(e->right.expr);
+               return EXPR_OR(val1, val2);
+       case E_NOT:
+               val1 = expr_calc_value(e->left.expr);
+               return EXPR_NOT(val1);
+       case E_EQUAL:
+       case E_GEQ:
+       case E_GTH:
+       case E_LEQ:
+       case E_LTH:
+       case E_UNEQUAL:
+               break;
+       default:
+               printf("expr_calc_value: %d?\n", e->type);
+               return no;
+       }
+
+       sym_calc_value(e->left.sym);
+       sym_calc_value(e->right.sym);
+       str1 = sym_get_string_value(e->left.sym);
+       str2 = sym_get_string_value(e->right.sym);
+
+       if (e->left.sym->type != S_STRING || e->right.sym->type != S_STRING) {
+               k1 = expr_parse_string(str1, e->left.sym->type, &lval);
+               k2 = expr_parse_string(str2, e->right.sym->type, &rval);
+       }
+
+       if (k1 == k_string || k2 == k_string)
+               res = strcmp(str1, str2);
+       else if (k1 == k_invalid || k2 == k_invalid) {
+               if (e->type != E_EQUAL && e->type != E_UNEQUAL) {
+                       printf("Cannot compare \"%s\" and \"%s\"\n", str1, 
str2);
+                       return no;
+               }
+               res = strcmp(str1, str2);
+       } else if (k1 == k_unsigned || k2 == k_unsigned)
+               res = (lval.u > rval.u) - (lval.u < rval.u);
+       else /* if (k1 == k_signed && k2 == k_signed) */
+               res = (lval.s > rval.s) - (lval.s < rval.s);
+
+       switch(e->type) {
+       case E_EQUAL:
+               return res ? no : yes;
+       case E_GEQ:
+               return res >= 0 ? yes : no;
+       case E_GTH:
+               return res > 0 ? yes : no;
+       case E_LEQ:
+               return res <= 0 ? yes : no;
+       case E_LTH:
+               return res < 0 ? yes : no;
+       case E_UNEQUAL:
+               return res ? yes : no;
+       default:
+               printf("expr_calc_value: relation %d?\n", e->type);
+               return no;
+       }
+}
+
+static int expr_compare_type(enum expr_type t1, enum expr_type t2)
+{
+       if (t1 == t2)
+               return 0;
+       switch (t1) {
+       case E_LEQ:
+       case E_LTH:
+       case E_GEQ:
+       case E_GTH:
+               if (t2 == E_EQUAL || t2 == E_UNEQUAL)
+                       return 1;
+       case E_EQUAL:
+       case E_UNEQUAL:
+               if (t2 == E_NOT)
+                       return 1;
+       case E_NOT:
+               if (t2 == E_AND)
+                       return 1;
+       case E_AND:
+               if (t2 == E_OR)
+                       return 1;
+       case E_OR:
+               if (t2 == E_LIST)
+                       return 1;
+       case E_LIST:
+               if (t2 == 0)
+                       return 1;
+       default:
+               return -1;
+       }
+       printf("[%dgt%d?]", t1, t2);
+       return 0;
+}
+
+static inline struct expr *
+expr_get_leftmost_symbol(const struct expr *e)
+{
+
+       if (e == NULL)
+               return NULL;
+
+       while (e->type != E_SYMBOL)
+               e = e->left.expr;
+
+       return expr_copy(e);
+}
+
+/*
+ * Given expression `e1' and `e2', returns the leaf of the longest
+ * sub-expression of `e1' not containing 'e2.
+ */
+struct expr *expr_simplify_unmet_dep(struct expr *e1, struct expr *e2)
+{
+       struct expr *ret;
+
+       switch (e1->type) {
+       case E_OR:
+               return expr_alloc_and(
+                   expr_simplify_unmet_dep(e1->left.expr, e2),
+                   expr_simplify_unmet_dep(e1->right.expr, e2));
+       case E_AND: {
+               struct expr *e;
+               e = expr_alloc_and(expr_copy(e1), expr_copy(e2));
+               e = expr_eliminate_dups(e);
+               ret = (!expr_eq(e, e1)) ? e1 : NULL;
+               expr_free(e);
+               break;
+               }
+       default:
+               ret = e1;
+               break;
+       }
+
+       return expr_get_leftmost_symbol(ret);
+}
+
+void expr_print(struct expr *e, void (*fn)(void *, struct symbol *, const char 
*), void *data, int prevtoken)
+{
+       if (!e) {
+               fn(data, NULL, "y");
+               return;
+       }
+
+       if (expr_compare_type(prevtoken, e->type) > 0)
+               fn(data, NULL, "(");
+       switch (e->type) {
+       case E_SYMBOL:
+               if (e->left.sym->name)
+                       fn(data, e->left.sym, e->left.sym->name);
+               else
+                       fn(data, NULL, "<choice>");
+               break;
+       case E_NOT:
+               fn(data, NULL, "!");
+               expr_print(e->left.expr, fn, data, E_NOT);
+               break;
+       case E_EQUAL:
+               if (e->left.sym->name)
+                       fn(data, e->left.sym, e->left.sym->name);
+               else
+                       fn(data, NULL, "<choice>");
+               fn(data, NULL, "=");
+               fn(data, e->right.sym, e->right.sym->name);
+               break;
+       case E_LEQ:
+       case E_LTH:
+               if (e->left.sym->name)
+                       fn(data, e->left.sym, e->left.sym->name);
+               else
+                       fn(data, NULL, "<choice>");
+               fn(data, NULL, e->type == E_LEQ ? "<=" : "<");
+               fn(data, e->right.sym, e->right.sym->name);
+               break;
+       case E_GEQ:
+       case E_GTH:
+               if (e->left.sym->name)
+                       fn(data, e->left.sym, e->left.sym->name);
+               else
+                       fn(data, NULL, "<choice>");
+               fn(data, NULL, e->type == E_LEQ ? ">=" : ">");
+               fn(data, e->right.sym, e->right.sym->name);
+               break;
+       case E_UNEQUAL:
+               if (e->left.sym->name)
+                       fn(data, e->left.sym, e->left.sym->name);
+               else
+                       fn(data, NULL, "<choice>");
+               fn(data, NULL, "!=");
+               fn(data, e->right.sym, e->right.sym->name);
+               break;
+       case E_OR:
+               expr_print(e->left.expr, fn, data, E_OR);
+               fn(data, NULL, " || ");
+               expr_print(e->right.expr, fn, data, E_OR);
+               break;
+       case E_AND:
+               expr_print(e->left.expr, fn, data, E_AND);
+               fn(data, NULL, " && ");
+               expr_print(e->right.expr, fn, data, E_AND);
+               break;
+       case E_LIST:
+               fn(data, e->right.sym, e->right.sym->name);
+               if (e->left.expr) {
+                       fn(data, NULL, " ^ ");
+                       expr_print(e->left.expr, fn, data, E_LIST);
+               }
+               break;
+       case E_RANGE:
+               fn(data, NULL, "[");
+               fn(data, e->left.sym, e->left.sym->name);
+               fn(data, NULL, " ");
+               fn(data, e->right.sym, e->right.sym->name);
+               fn(data, NULL, "]");
+               break;
+       default:
+         {
+               char buf[32];
+               sprintf(buf, "<unknown type %d>", e->type);
+               fn(data, NULL, buf);
+               break;
+         }
+       }
+       if (expr_compare_type(prevtoken, e->type) > 0)
+               fn(data, NULL, ")");
+}
+
+static void expr_print_file_helper(void *data, struct symbol *sym, const char 
*str)
+{
+       xfwrite(str, strlen(str), 1, data);
+}
+
+void expr_fprint(struct expr *e, FILE *out)
+{
+       expr_print(e, expr_print_file_helper, out, E_NONE);
+}
+
+static void expr_print_gstr_helper(void *data, struct symbol *sym, const char 
*str)
+{
+       struct gstr *gs = (struct gstr*)data;
+       const char *sym_str = NULL;
+
+       if (sym)
+               sym_str = sym_get_string_value(sym);
+
+       if (gs->max_width) {
+               unsigned extra_length = strlen(str);
+               const char *last_cr = strrchr(gs->s, '\n');
+               unsigned last_line_length;
+
+               if (sym_str)
+                       extra_length += 4 + strlen(sym_str);
+
+               if (!last_cr)
+                       last_cr = gs->s;
+
+               last_line_length = strlen(gs->s) - (last_cr - gs->s);
+
+               if ((last_line_length + extra_length) > gs->max_width)
+                       str_append(gs, "\\\n");
+       }
+
+       str_append(gs, str);
+       if (sym && sym->type != S_UNKNOWN)
+               str_printf(gs, " [=%s]", sym_str);
+}
+
+void expr_gstr_print(struct expr *e, struct gstr *gs)
+{
+       expr_print(e, expr_print_gstr_helper, gs, E_NONE);
+}
diff --git a/xen/tools/kconfig/expr.h b/xen/tools/kconfig/expr.h
new file mode 100644
index 0000000..973b6f7
--- /dev/null
+++ b/xen/tools/kconfig/expr.h
@@ -0,0 +1,238 @@
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@xxxxxxxxxxxxxx>
+ * Released under the terms of the GNU GPL v2.0.
+ */
+
+#ifndef EXPR_H
+#define EXPR_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <assert.h>
+#include <stdio.h>
+#include "list.h"
+#ifndef __cplusplus
+#include <stdbool.h>
+#endif
+
+struct file {
+       struct file *next;
+       struct file *parent;
+       const char *name;
+       int lineno;
+};
+
+typedef enum tristate {
+       no, mod, yes
+} tristate;
+
+enum expr_type {
+       E_NONE, E_OR, E_AND, E_NOT,
+       E_EQUAL, E_UNEQUAL, E_LTH, E_LEQ, E_GTH, E_GEQ,
+       E_LIST, E_SYMBOL, E_RANGE
+};
+
+union expr_data {
+       struct expr *expr;
+       struct symbol *sym;
+};
+
+struct expr {
+       enum expr_type type;
+       union expr_data left, right;
+};
+
+#define EXPR_OR(dep1, dep2)    (((dep1)>(dep2))?(dep1):(dep2))
+#define EXPR_AND(dep1, dep2)   (((dep1)<(dep2))?(dep1):(dep2))
+#define EXPR_NOT(dep)          (2-(dep))
+
+#define expr_list_for_each_sym(l, e, s) \
+       for (e = (l); e && (s = e->right.sym); e = e->left.expr)
+
+struct expr_value {
+       struct expr *expr;
+       tristate tri;
+};
+
+struct symbol_value {
+       void *val;
+       tristate tri;
+};
+
+enum symbol_type {
+       S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
+};
+
+/* enum values are used as index to symbol.def[] */
+enum {
+       S_DEF_USER,             /* main user value */
+       S_DEF_AUTO,             /* values read from auto.conf */
+       S_DEF_DEF3,             /* Reserved for UI usage */
+       S_DEF_DEF4,             /* Reserved for UI usage */
+       S_DEF_COUNT
+};
+
+struct symbol {
+       struct symbol *next;
+       char *name;
+       enum symbol_type type;
+       struct symbol_value curr;
+       struct symbol_value def[S_DEF_COUNT];
+       tristate visible;
+       int flags;
+       struct property *prop;
+       struct expr_value dir_dep;
+       struct expr_value rev_dep;
+};
+
+#define for_all_symbols(i, sym) for (i = 0; i < SYMBOL_HASHSIZE; i++) for (sym 
= symbol_hash[i]; sym; sym = sym->next) if (sym->type != S_OTHER)
+
+#define SYMBOL_CONST      0x0001  /* symbol is const */
+#define SYMBOL_CHECK      0x0008  /* used during dependency checking */
+#define SYMBOL_CHOICE     0x0010  /* start of a choice block (null name) */
+#define SYMBOL_CHOICEVAL  0x0020  /* used as a value in a choice block */
+#define SYMBOL_VALID      0x0080  /* set when symbol.curr is calculated */
+#define SYMBOL_OPTIONAL   0x0100  /* choice is optional - values can be 'n' */
+#define SYMBOL_WRITE      0x0200  /* write symbol to file (KCONFIG_CONFIG) */
+#define SYMBOL_CHANGED    0x0400  /* ? */
+#define SYMBOL_AUTO       0x1000  /* value from environment variable */
+#define SYMBOL_CHECKED    0x2000  /* used during dependency checking */
+#define SYMBOL_WARNED     0x8000  /* warning has been issued */
+
+/* Set when symbol.def[] is used */
+#define SYMBOL_DEF        0x10000  /* First bit of SYMBOL_DEF */
+#define SYMBOL_DEF_USER   0x10000  /* symbol.def[S_DEF_USER] is valid */
+#define SYMBOL_DEF_AUTO   0x20000  /* symbol.def[S_DEF_AUTO] is valid */
+#define SYMBOL_DEF3       0x40000  /* symbol.def[S_DEF_3] is valid */
+#define SYMBOL_DEF4       0x80000  /* symbol.def[S_DEF_4] is valid */
+
+/* choice values need to be set before calculating this symbol value */
+#define SYMBOL_NEED_SET_CHOICE_VALUES  0x100000
+
+/* Set symbol to y if allnoconfig; used for symbols that hide others */
+#define SYMBOL_ALLNOCONFIG_Y 0x200000
+
+#define SYMBOL_MAXLENGTH       256
+#define SYMBOL_HASHSIZE                9973
+
+/* A property represent the config options that can be associated
+ * with a config "symbol".
+ * Sample:
+ * config FOO
+ *         default y
+ *         prompt "foo prompt"
+ *         select BAR
+ * config BAZ
+ *         int "BAZ Value"
+ *         range 1..255
+ */
+enum prop_type {
+       P_UNKNOWN,
+       P_PROMPT,   /* prompt "foo prompt" or "BAZ Value" */
+       P_COMMENT,  /* text associated with a comment */
+       P_MENU,     /* prompt associated with a menuconfig option */
+       P_DEFAULT,  /* default y */
+       P_CHOICE,   /* choice value */
+       P_SELECT,   /* select BAR */
+       P_RANGE,    /* range 7..100 (for a symbol) */
+       P_ENV,      /* value from environment variable */
+       P_SYMBOL,   /* where a symbol is defined */
+};
+
+struct property {
+       struct property *next;     /* next property - null if last */
+       struct symbol *sym;        /* the symbol for which the property is 
associated */
+       enum prop_type type;       /* type of property */
+       const char *text;          /* the prompt value - P_PROMPT, P_MENU, 
P_COMMENT */
+       struct expr_value visible;
+       struct expr *expr;         /* the optional conditional part of the 
property */
+       struct menu *menu;         /* the menu the property are associated with
+                                   * valid for: P_SELECT, P_RANGE, P_CHOICE,
+                                   * P_PROMPT, P_DEFAULT, P_MENU, P_COMMENT */
+       struct file *file;         /* what file was this property defined */
+       int lineno;                /* what lineno was this property defined */
+};
+
+#define for_all_properties(sym, st, tok) \
+       for (st = sym->prop; st; st = st->next) \
+               if (st->type == (tok))
+#define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
+#define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
+#define for_all_prompts(sym, st) \
+       for (st = sym->prop; st; st = st->next) \
+               if (st->text)
+
+struct menu {
+       struct menu *next;
+       struct menu *parent;
+       struct menu *list;
+       struct symbol *sym;
+       struct property *prompt;
+       struct expr *visibility;
+       struct expr *dep;
+       unsigned int flags;
+       char *help;
+       struct file *file;
+       int lineno;
+       void *data;
+};
+
+#define MENU_CHANGED           0x0001
+#define MENU_ROOT              0x0002
+
+struct jump_key {
+       struct list_head entries;
+       size_t offset;
+       struct menu *target;
+       int index;
+};
+
+#define JUMP_NB                        9
+
+extern struct file *file_list;
+extern struct file *current_file;
+struct file *lookup_file(const char *name);
+
+extern struct symbol symbol_yes, symbol_no, symbol_mod;
+extern struct symbol *modules_sym;
+extern struct symbol *sym_defconfig_list;
+extern int cdebug;
+struct expr *expr_alloc_symbol(struct symbol *sym);
+struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
+struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr 
*e2);
+struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct 
symbol *s2);
+struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
+struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
+struct expr *expr_copy(const struct expr *org);
+void expr_free(struct expr *e);
+void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
+tristate expr_calc_value(struct expr *e);
+struct expr *expr_trans_bool(struct expr *e);
+struct expr *expr_eliminate_dups(struct expr *e);
+struct expr *expr_transform(struct expr *e);
+int expr_contains_symbol(struct expr *dep, struct symbol *sym);
+bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
+struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct 
symbol *sym);
+struct expr *expr_simplify_unmet_dep(struct expr *e1, struct expr *e2);
+
+void expr_fprint(struct expr *e, FILE *out);
+struct gstr; /* forward */
+void expr_gstr_print(struct expr *e, struct gstr *gs);
+
+static inline int expr_is_yes(struct expr *e)
+{
+       return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
+}
+
+static inline int expr_is_no(struct expr *e)
+{
+       return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EXPR_H */
diff --git a/xen/tools/kconfig/gconf.c b/xen/tools/kconfig/gconf.c
new file mode 100644
index 0000000..26d208b
--- /dev/null
+++ b/xen/tools/kconfig/gconf.c
@@ -0,0 +1,1521 @@
+/* Hey EMACS -*- linux-c -*- */
+/*
+ *
+ * Copyright (C) 2002-2003 Romain Lievin <roms@xxxxxxxxx>
+ * Released under the terms of the GNU GPL v2.0.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include <stdlib.h>
+#include "lkc.h"
+#include "images.c"
+
+#include <glade/glade.h>
+#include <gtk/gtk.h>
+#include <glib.h>
+#include <gdk/gdkkeysyms.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <time.h>
+
+//#define DEBUG
+
+enum {
+       SINGLE_VIEW, SPLIT_VIEW, FULL_VIEW
+};
+
+enum {
+       OPT_NORMAL, OPT_ALL, OPT_PROMPT
+};
+
+static gint view_mode = FULL_VIEW;
+static gboolean show_name = TRUE;
+static gboolean show_range = TRUE;
+static gboolean show_value = TRUE;
+static gboolean resizeable = FALSE;
+static int opt_mode = OPT_NORMAL;
+
+GtkWidget *main_wnd = NULL;
+GtkWidget *tree1_w = NULL;     // left  frame
+GtkWidget *tree2_w = NULL;     // right frame
+GtkWidget *text_w = NULL;
+GtkWidget *hpaned = NULL;
+GtkWidget *vpaned = NULL;
+GtkWidget *back_btn = NULL;
+GtkWidget *save_btn = NULL;
+GtkWidget *save_menu_item = NULL;
+
+GtkTextTag *tag1, *tag2;
+GdkColor color;
+
+GtkTreeStore *tree1, *tree2, *tree;
+GtkTreeModel *model1, *model2;
+static GtkTreeIter *parents[256];
+static gint indent;
+
+static struct menu *current; // current node for SINGLE view
+static struct menu *browsed; // browsed node for SPLIT view
+
+enum {
+       COL_OPTION, COL_NAME, COL_NO, COL_MOD, COL_YES, COL_VALUE,
+       COL_MENU, COL_COLOR, COL_EDIT, COL_PIXBUF,
+       COL_PIXVIS, COL_BTNVIS, COL_BTNACT, COL_BTNINC, COL_BTNRAD,
+       COL_NUMBER
+};
+
+static void display_list(void);
+static void display_tree(struct menu *menu);
+static void display_tree_part(void);
+static void update_tree(struct menu *src, GtkTreeIter * dst);
+static void set_node(GtkTreeIter * node, struct menu *menu, gchar ** row);
+static gchar **fill_row(struct menu *menu);
+static void conf_changed(void);
+
+/* Helping/Debugging Functions */
+
+const char *dbg_sym_flags(int val)
+{
+       static char buf[256];
+
+       bzero(buf, 256);
+
+       if (val & SYMBOL_CONST)
+               strcat(buf, "const/");
+       if (val & SYMBOL_CHECK)
+               strcat(buf, "check/");
+       if (val & SYMBOL_CHOICE)
+               strcat(buf, "choice/");
+       if (val & SYMBOL_CHOICEVAL)
+               strcat(buf, "choiceval/");
+       if (val & SYMBOL_VALID)
+               strcat(buf, "valid/");
+       if (val & SYMBOL_OPTIONAL)
+               strcat(buf, "optional/");
+       if (val & SYMBOL_WRITE)
+               strcat(buf, "write/");
+       if (val & SYMBOL_CHANGED)
+               strcat(buf, "changed/");
+       if (val & SYMBOL_AUTO)
+               strcat(buf, "auto/");
+
+       buf[strlen(buf) - 1] = '\0';
+
+       return buf;
+}
+
+void replace_button_icon(GladeXML * xml, GdkDrawable * window,
+                        GtkStyle * style, gchar * btn_name, gchar ** xpm)
+{
+       GdkPixmap *pixmap;
+       GdkBitmap *mask;
+       GtkToolButton *button;
+       GtkWidget *image;
+
+       pixmap = gdk_pixmap_create_from_xpm_d(window, &mask,
+                                             &style->bg[GTK_STATE_NORMAL],
+                                             xpm);
+
+       button = GTK_TOOL_BUTTON(glade_xml_get_widget(xml, btn_name));
+       image = gtk_image_new_from_pixmap(pixmap, mask);
+       gtk_widget_show(image);
+       gtk_tool_button_set_icon_widget(button, image);
+}
+
+/* Main Window Initialization */
+void init_main_window(const gchar * glade_file)
+{
+       GladeXML *xml;
+       GtkWidget *widget;
+       GtkTextBuffer *txtbuf;
+       GtkStyle *style;
+
+       xml = glade_xml_new(glade_file, "window1", NULL);
+       if (!xml)
+               g_error(_("GUI loading failed !\n"));
+       glade_xml_signal_autoconnect(xml);
+
+       main_wnd = glade_xml_get_widget(xml, "window1");
+       hpaned = glade_xml_get_widget(xml, "hpaned1");
+       vpaned = glade_xml_get_widget(xml, "vpaned1");
+       tree1_w = glade_xml_get_widget(xml, "treeview1");
+       tree2_w = glade_xml_get_widget(xml, "treeview2");
+       text_w = glade_xml_get_widget(xml, "textview3");
+
+       back_btn = glade_xml_get_widget(xml, "button1");
+       gtk_widget_set_sensitive(back_btn, FALSE);
+
+       widget = glade_xml_get_widget(xml, "show_name1");
+       gtk_check_menu_item_set_active((GtkCheckMenuItem *) widget,
+                                      show_name);
+
+       widget = glade_xml_get_widget(xml, "show_range1");
+       gtk_check_menu_item_set_active((GtkCheckMenuItem *) widget,
+                                      show_range);
+
+       widget = glade_xml_get_widget(xml, "show_data1");
+       gtk_check_menu_item_set_active((GtkCheckMenuItem *) widget,
+                                      show_value);
+
+       save_btn = glade_xml_get_widget(xml, "button3");
+       save_menu_item = glade_xml_get_widget(xml, "save1");
+       conf_set_changed_callback(conf_changed);
+
+       style = gtk_widget_get_style(main_wnd);
+       widget = glade_xml_get_widget(xml, "toolbar1");
+
+       replace_button_icon(xml, main_wnd->window, style,
+                           "button4", (gchar **) xpm_single_view);
+       replace_button_icon(xml, main_wnd->window, style,
+                           "button5", (gchar **) xpm_split_view);
+       replace_button_icon(xml, main_wnd->window, style,
+                           "button6", (gchar **) xpm_tree_view);
+
+       txtbuf = gtk_text_view_get_buffer(GTK_TEXT_VIEW(text_w));
+       tag1 = gtk_text_buffer_create_tag(txtbuf, "mytag1",
+                                         "foreground", "red",
+                                         "weight", PANGO_WEIGHT_BOLD,
+                                         NULL);
+       tag2 = gtk_text_buffer_create_tag(txtbuf, "mytag2",
+                                         /*"style", PANGO_STYLE_OBLIQUE, */
+                                         NULL);
+
+       gtk_window_set_title(GTK_WINDOW(main_wnd), rootmenu.prompt->text);
+
+       gtk_widget_show(main_wnd);
+}
+
+void init_tree_model(void)
+{
+       gint i;
+
+       tree = tree2 = gtk_tree_store_new(COL_NUMBER,
+                                         G_TYPE_STRING, G_TYPE_STRING,
+                                         G_TYPE_STRING, G_TYPE_STRING,
+                                         G_TYPE_STRING, G_TYPE_STRING,
+                                         G_TYPE_POINTER, GDK_TYPE_COLOR,
+                                         G_TYPE_BOOLEAN, GDK_TYPE_PIXBUF,
+                                         G_TYPE_BOOLEAN, G_TYPE_BOOLEAN,
+                                         G_TYPE_BOOLEAN, G_TYPE_BOOLEAN,
+                                         G_TYPE_BOOLEAN);
+       model2 = GTK_TREE_MODEL(tree2);
+
+       for (parents[0] = NULL, i = 1; i < 256; i++)
+               parents[i] = (GtkTreeIter *) g_malloc(sizeof(GtkTreeIter));
+
+       tree1 = gtk_tree_store_new(COL_NUMBER,
+                                  G_TYPE_STRING, G_TYPE_STRING,
+                                  G_TYPE_STRING, G_TYPE_STRING,
+                                  G_TYPE_STRING, G_TYPE_STRING,
+                                  G_TYPE_POINTER, GDK_TYPE_COLOR,
+                                  G_TYPE_BOOLEAN, GDK_TYPE_PIXBUF,
+                                  G_TYPE_BOOLEAN, G_TYPE_BOOLEAN,
+                                  G_TYPE_BOOLEAN, G_TYPE_BOOLEAN,
+                                  G_TYPE_BOOLEAN);
+       model1 = GTK_TREE_MODEL(tree1);
+}
+
+void init_left_tree(void)
+{
+       GtkTreeView *view = GTK_TREE_VIEW(tree1_w);
+       GtkCellRenderer *renderer;
+       GtkTreeSelection *sel;
+       GtkTreeViewColumn *column;
+
+       gtk_tree_view_set_model(view, model1);
+       gtk_tree_view_set_headers_visible(view, TRUE);
+       gtk_tree_view_set_rules_hint(view, TRUE);
+
+       column = gtk_tree_view_column_new();
+       gtk_tree_view_append_column(view, column);
+       gtk_tree_view_column_set_title(column, _("Options"));
+
+       renderer = gtk_cell_renderer_toggle_new();
+       gtk_tree_view_column_pack_start(GTK_TREE_VIEW_COLUMN(column),
+                                       renderer, FALSE);
+       gtk_tree_view_column_set_attributes(GTK_TREE_VIEW_COLUMN(column),
+                                           renderer,
+                                           "active", COL_BTNACT,
+                                           "inconsistent", COL_BTNINC,
+                                           "visible", COL_BTNVIS,
+                                           "radio", COL_BTNRAD, NULL);
+       renderer = gtk_cell_renderer_text_new();
+       gtk_tree_view_column_pack_start(GTK_TREE_VIEW_COLUMN(column),
+                                       renderer, FALSE);
+       gtk_tree_view_column_set_attributes(GTK_TREE_VIEW_COLUMN(column),
+                                           renderer,
+                                           "text", COL_OPTION,
+                                           "foreground-gdk",
+                                           COL_COLOR, NULL);
+
+       sel = gtk_tree_view_get_selection(view);
+       gtk_tree_selection_set_mode(sel, GTK_SELECTION_SINGLE);
+       gtk_widget_realize(tree1_w);
+}
+
+static void renderer_edited(GtkCellRendererText * cell,
+                           const gchar * path_string,
+                           const gchar * new_text, gpointer user_data);
+
+void init_right_tree(void)
+{
+       GtkTreeView *view = GTK_TREE_VIEW(tree2_w);
+       GtkCellRenderer *renderer;
+       GtkTreeSelection *sel;
+       GtkTreeViewColumn *column;
+       gint i;
+
+       gtk_tree_view_set_model(view, model2);
+       gtk_tree_view_set_headers_visible(view, TRUE);
+       gtk_tree_view_set_rules_hint(view, TRUE);
+
+       column = gtk_tree_view_column_new();
+       gtk_tree_view_append_column(view, column);
+       gtk_tree_view_column_set_title(column, _("Options"));
+
+       renderer = gtk_cell_renderer_pixbuf_new();
+       gtk_tree_view_column_pack_start(GTK_TREE_VIEW_COLUMN(column),
+                                       renderer, FALSE);
+       gtk_tree_view_column_set_attributes(GTK_TREE_VIEW_COLUMN(column),
+                                           renderer,
+                                           "pixbuf", COL_PIXBUF,
+                                           "visible", COL_PIXVIS, NULL);
+       renderer = gtk_cell_renderer_toggle_new();
+       gtk_tree_view_column_pack_start(GTK_TREE_VIEW_COLUMN(column),
+                                       renderer, FALSE);
+       gtk_tree_view_column_set_attributes(GTK_TREE_VIEW_COLUMN(column),
+                                           renderer,
+                                           "active", COL_BTNACT,
+                                           "inconsistent", COL_BTNINC,
+                                           "visible", COL_BTNVIS,
+                                           "radio", COL_BTNRAD, NULL);
+       renderer = gtk_cell_renderer_text_new();
+       gtk_tree_view_column_pack_start(GTK_TREE_VIEW_COLUMN(column),
+                                       renderer, FALSE);
+       gtk_tree_view_column_set_attributes(GTK_TREE_VIEW_COLUMN(column),
+                                           renderer,
+                                           "text", COL_OPTION,
+                                           "foreground-gdk",
+                                           COL_COLOR, NULL);
+
+       renderer = gtk_cell_renderer_text_new();
+       gtk_tree_view_insert_column_with_attributes(view, -1,
+                                                   _("Name"), renderer,
+                                                   "text", COL_NAME,
+                                                   "foreground-gdk",
+                                                   COL_COLOR, NULL);
+       renderer = gtk_cell_renderer_text_new();
+       gtk_tree_view_insert_column_with_attributes(view, -1,
+                                                   "N", renderer,
+                                                   "text", COL_NO,
+                                                   "foreground-gdk",
+                                                   COL_COLOR, NULL);
+       renderer = gtk_cell_renderer_text_new();
+       gtk_tree_view_insert_column_with_attributes(view, -1,
+                                                   "M", renderer,
+                                                   "text", COL_MOD,
+                                                   "foreground-gdk",
+                                                   COL_COLOR, NULL);
+       renderer = gtk_cell_renderer_text_new();
+       gtk_tree_view_insert_column_with_attributes(view, -1,
+                                                   "Y", renderer,
+                                                   "text", COL_YES,
+                                                   "foreground-gdk",
+                                                   COL_COLOR, NULL);
+       renderer = gtk_cell_renderer_text_new();
+       gtk_tree_view_insert_column_with_attributes(view, -1,
+                                                   _("Value"), renderer,
+                                                   "text", COL_VALUE,
+                                                   "editable",
+                                                   COL_EDIT,
+                                                   "foreground-gdk",
+                                                   COL_COLOR, NULL);
+       g_signal_connect(G_OBJECT(renderer), "edited",
+                        G_CALLBACK(renderer_edited), NULL);
+
+       column = gtk_tree_view_get_column(view, COL_NAME);
+       gtk_tree_view_column_set_visible(column, show_name);
+       column = gtk_tree_view_get_column(view, COL_NO);
+       gtk_tree_view_column_set_visible(column, show_range);
+       column = gtk_tree_view_get_column(view, COL_MOD);
+       gtk_tree_view_column_set_visible(column, show_range);
+       column = gtk_tree_view_get_column(view, COL_YES);
+       gtk_tree_view_column_set_visible(column, show_range);
+       column = gtk_tree_view_get_column(view, COL_VALUE);
+       gtk_tree_view_column_set_visible(column, show_value);
+
+       if (resizeable) {
+               for (i = 0; i < COL_VALUE; i++) {
+                       column = gtk_tree_view_get_column(view, i);
+                       gtk_tree_view_column_set_resizable(column, TRUE);
+               }
+       }
+
+       sel = gtk_tree_view_get_selection(view);
+       gtk_tree_selection_set_mode(sel, GTK_SELECTION_SINGLE);
+}
+
+
+/* Utility Functions */
+
+
+static void text_insert_help(struct menu *menu)
+{
+       GtkTextBuffer *buffer;
+       GtkTextIter start, end;
+       const char *prompt = _(menu_get_prompt(menu));
+       struct gstr help = str_new();
+
+       menu_get_ext_help(menu, &help);
+
+       buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(text_w));
+       gtk_text_buffer_get_bounds(buffer, &start, &end);
+       gtk_text_buffer_delete(buffer, &start, &end);
+       gtk_text_view_set_left_margin(GTK_TEXT_VIEW(text_w), 15);
+
+       gtk_text_buffer_get_end_iter(buffer, &end);
+       gtk_text_buffer_insert_with_tags(buffer, &end, prompt, -1, tag1,
+                                        NULL);
+       gtk_text_buffer_insert_at_cursor(buffer, "\n\n", 2);
+       gtk_text_buffer_get_end_iter(buffer, &end);
+       gtk_text_buffer_insert_with_tags(buffer, &end, str_get(&help), -1, tag2,
+                                        NULL);
+       str_free(&help);
+}
+
+
+static void text_insert_msg(const char *title, const char *message)
+{
+       GtkTextBuffer *buffer;
+       GtkTextIter start, end;
+       const char *msg = message;
+
+       buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(text_w));
+       gtk_text_buffer_get_bounds(buffer, &start, &end);
+       gtk_text_buffer_delete(buffer, &start, &end);
+       gtk_text_view_set_left_margin(GTK_TEXT_VIEW(text_w), 15);
+
+       gtk_text_buffer_get_end_iter(buffer, &end);
+       gtk_text_buffer_insert_with_tags(buffer, &end, title, -1, tag1,
+                                        NULL);
+       gtk_text_buffer_insert_at_cursor(buffer, "\n\n", 2);
+       gtk_text_buffer_get_end_iter(buffer, &end);
+       gtk_text_buffer_insert_with_tags(buffer, &end, msg, -1, tag2,
+                                        NULL);
+}
+
+
+/* Main Windows Callbacks */
+
+void on_save_activate(GtkMenuItem * menuitem, gpointer user_data);
+gboolean on_window1_delete_event(GtkWidget * widget, GdkEvent * event,
+                                gpointer user_data)
+{
+       GtkWidget *dialog, *label;
+       gint result;
+
+       if (!conf_get_changed())
+               return FALSE;
+
+       dialog = gtk_dialog_new_with_buttons(_("Warning !"),
+                                            GTK_WINDOW(main_wnd),
+                                            (GtkDialogFlags)
+                                            (GTK_DIALOG_MODAL |
+                                             GTK_DIALOG_DESTROY_WITH_PARENT),
+                                            GTK_STOCK_OK,
+                                            GTK_RESPONSE_YES,
+                                            GTK_STOCK_NO,
+                                            GTK_RESPONSE_NO,
+                                            GTK_STOCK_CANCEL,
+                                            GTK_RESPONSE_CANCEL, NULL);
+       gtk_dialog_set_default_response(GTK_DIALOG(dialog),
+                                       GTK_RESPONSE_CANCEL);
+
+       label = gtk_label_new(_("\nSave configuration ?\n"));
+       gtk_container_add(GTK_CONTAINER(GTK_DIALOG(dialog)->vbox), label);
+       gtk_widget_show(label);
+
+       result = gtk_dialog_run(GTK_DIALOG(dialog));
+       switch (result) {
+       case GTK_RESPONSE_YES:
+               on_save_activate(NULL, NULL);
+               return FALSE;
+       case GTK_RESPONSE_NO:
+               return FALSE;
+       case GTK_RESPONSE_CANCEL:
+       case GTK_RESPONSE_DELETE_EVENT:
+       default:
+               gtk_widget_destroy(dialog);
+               return TRUE;
+       }
+
+       return FALSE;
+}
+
+
+void on_window1_destroy(GtkObject * object, gpointer user_data)
+{
+       gtk_main_quit();
+}
+
+
+void
+on_window1_size_request(GtkWidget * widget,
+                       GtkRequisition * requisition, gpointer user_data)
+{
+       static gint old_h;
+       gint w, h;
+
+       if (widget->window == NULL)
+               gtk_window_get_default_size(GTK_WINDOW(main_wnd), &w, &h);
+       else
+               gdk_window_get_size(widget->window, &w, &h);
+
+       if (h == old_h)
+               return;
+       old_h = h;
+
+       gtk_paned_set_position(GTK_PANED(vpaned), 2 * h / 3);
+}
+
+
+/* Menu & Toolbar Callbacks */
+
+
+static void
+load_filename(GtkFileSelection * file_selector, gpointer user_data)
+{
+       const gchar *fn;
+
+       fn = gtk_file_selection_get_filename(GTK_FILE_SELECTION
+                                            (user_data));
+
+       if (conf_read(fn))
+               text_insert_msg(_("Error"), _("Unable to load configuration 
!"));
+       else
+               display_tree(&rootmenu);
+}
+
+void on_load1_activate(GtkMenuItem * menuitem, gpointer user_data)
+{
+       GtkWidget *fs;
+
+       fs = gtk_file_selection_new(_("Load file..."));
+       g_signal_connect(GTK_OBJECT(GTK_FILE_SELECTION(fs)->ok_button),
+                        "clicked",
+                        G_CALLBACK(load_filename), (gpointer) fs);
+       g_signal_connect_swapped(GTK_OBJECT
+                                (GTK_FILE_SELECTION(fs)->ok_button),
+                                "clicked", G_CALLBACK(gtk_widget_destroy),
+                                (gpointer) fs);
+       g_signal_connect_swapped(GTK_OBJECT
+                                (GTK_FILE_SELECTION(fs)->cancel_button),
+                                "clicked", G_CALLBACK(gtk_widget_destroy),
+                                (gpointer) fs);
+       gtk_widget_show(fs);
+}
+
+
+void on_save_activate(GtkMenuItem * menuitem, gpointer user_data)
+{
+       if (conf_write(NULL))
+               text_insert_msg(_("Error"), _("Unable to save configuration 
!"));
+}
+
+
+static void
+store_filename(GtkFileSelection * file_selector, gpointer user_data)
+{
+       const gchar *fn;
+
+       fn = gtk_file_selection_get_filename(GTK_FILE_SELECTION
+                                            (user_data));
+
+       if (conf_write(fn))
+               text_insert_msg(_("Error"), _("Unable to save configuration 
!"));
+
+       gtk_widget_destroy(GTK_WIDGET(user_data));
+}
+
+void on_save_as1_activate(GtkMenuItem * menuitem, gpointer user_data)
+{
+       GtkWidget *fs;
+
+       fs = gtk_file_selection_new(_("Save file as..."));
+       g_signal_connect(GTK_OBJECT(GTK_FILE_SELECTION(fs)->ok_button),
+                        "clicked",
+                        G_CALLBACK(store_filename), (gpointer) fs);
+       g_signal_connect_swapped(GTK_OBJECT
+                                (GTK_FILE_SELECTION(fs)->ok_button),
+                                "clicked", G_CALLBACK(gtk_widget_destroy),
+                                (gpointer) fs);
+       g_signal_connect_swapped(GTK_OBJECT
+                                (GTK_FILE_SELECTION(fs)->cancel_button),
+                                "clicked", G_CALLBACK(gtk_widget_destroy),
+                                (gpointer) fs);
+       gtk_widget_show(fs);
+}
+
+
+void on_quit1_activate(GtkMenuItem * menuitem, gpointer user_data)
+{
+       if (!on_window1_delete_event(NULL, NULL, NULL))
+               gtk_widget_destroy(GTK_WIDGET(main_wnd));
+}
+
+
+void on_show_name1_activate(GtkMenuItem * menuitem, gpointer user_data)
+{
+       GtkTreeViewColumn *col;
+
+       show_name = GTK_CHECK_MENU_ITEM(menuitem)->active;
+       col = gtk_tree_view_get_column(GTK_TREE_VIEW(tree2_w), COL_NAME);
+       if (col)
+               gtk_tree_view_column_set_visible(col, show_name);
+}
+
+
+void on_show_range1_activate(GtkMenuItem * menuitem, gpointer user_data)
+{
+       GtkTreeViewColumn *col;
+
+       show_range = GTK_CHECK_MENU_ITEM(menuitem)->active;
+       col = gtk_tree_view_get_column(GTK_TREE_VIEW(tree2_w), COL_NO);
+       if (col)
+               gtk_tree_view_column_set_visible(col, show_range);
+       col = gtk_tree_view_get_column(GTK_TREE_VIEW(tree2_w), COL_MOD);
+       if (col)
+               gtk_tree_view_column_set_visible(col, show_range);
+       col = gtk_tree_view_get_column(GTK_TREE_VIEW(tree2_w), COL_YES);
+       if (col)
+               gtk_tree_view_column_set_visible(col, show_range);
+
+}
+
+
+void on_show_data1_activate(GtkMenuItem * menuitem, gpointer user_data)
+{
+       GtkTreeViewColumn *col;
+
+       show_value = GTK_CHECK_MENU_ITEM(menuitem)->active;
+       col = gtk_tree_view_get_column(GTK_TREE_VIEW(tree2_w), COL_VALUE);
+       if (col)
+               gtk_tree_view_column_set_visible(col, show_value);
+}
+
+
+void
+on_set_option_mode1_activate(GtkMenuItem *menuitem, gpointer user_data)
+{
+       opt_mode = OPT_NORMAL;
+       gtk_tree_store_clear(tree2);
+       display_tree(&rootmenu);        /* instead of update_tree to speed-up */
+}
+
+
+void
+on_set_option_mode2_activate(GtkMenuItem *menuitem, gpointer user_data)
+{
+       opt_mode = OPT_ALL;
+       gtk_tree_store_clear(tree2);
+       display_tree(&rootmenu);        /* instead of update_tree to speed-up */
+}
+
+
+void
+on_set_option_mode3_activate(GtkMenuItem *menuitem, gpointer user_data)
+{
+       opt_mode = OPT_PROMPT;
+       gtk_tree_store_clear(tree2);
+       display_tree(&rootmenu);        /* instead of update_tree to speed-up */
+}
+
+
+void on_introduction1_activate(GtkMenuItem * menuitem, gpointer user_data)
+{
+       GtkWidget *dialog;
+       const gchar *intro_text = _(
+           "Welcome to gkc, the GTK+ graphical configuration tool\n"
+           "For each option, a blank box indicates the feature is disabled, 
a\n"
+           "check indicates it is enabled, and a dot indicates that it is to\n"
+           "be compiled as a module.  Clicking on the box will cycle through 
the three states.\n"
+           "\n"
+           "If you do not see an option (e.g., a device driver) that you\n"
+           "believe should be present, try turning on Show All Options\n"
+           "under the Options menu.\n"
+           "Although there is no cross reference yet to help you figure out\n"
+           "what other options must be enabled to support the option you\n"
+           "are interested in, you can still view the help of a grayed-out\n"
+           "option.\n"
+           "\n"
+           "Toggling Show Debug Info under the Options menu will show \n"
+           "the dependencies, which you can then match by examining other 
options.");
+
+       dialog = gtk_message_dialog_new(GTK_WINDOW(main_wnd),
+                                       GTK_DIALOG_DESTROY_WITH_PARENT,
+                                       GTK_MESSAGE_INFO,
+                                       GTK_BUTTONS_CLOSE, "%s", intro_text);
+       g_signal_connect_swapped(GTK_OBJECT(dialog), "response",
+                                G_CALLBACK(gtk_widget_destroy),
+                                GTK_OBJECT(dialog));
+       gtk_widget_show_all(dialog);
+}
+
+
+void on_about1_activate(GtkMenuItem * menuitem, gpointer user_data)
+{
+       GtkWidget *dialog;
+       const gchar *about_text =
+           _("gkc is copyright (c) 2002 Romain Lievin <roms@xxxxxxxxxxxxxx>.\n"
+             "Based on the source code from Roman Zippel.\n");
+
+       dialog = gtk_message_dialog_new(GTK_WINDOW(main_wnd),
+                                       GTK_DIALOG_DESTROY_WITH_PARENT,
+                                       GTK_MESSAGE_INFO,
+                                       GTK_BUTTONS_CLOSE, "%s", about_text);
+       g_signal_connect_swapped(GTK_OBJECT(dialog), "response",
+                                G_CALLBACK(gtk_widget_destroy),
+                                GTK_OBJECT(dialog));
+       gtk_widget_show_all(dialog);
+}
+
+
+void on_license1_activate(GtkMenuItem * menuitem, gpointer user_data)
+{
+       GtkWidget *dialog;
+       const gchar *license_text =
+           _("gkc is released under the terms of the GNU GPL v2.\n"
+             "For more information, please see the source code or\n"
+             "visit http://www.fsf.org/licenses/licenses.html\n";);
+
+       dialog = gtk_message_dialog_new(GTK_WINDOW(main_wnd),
+                                       GTK_DIALOG_DESTROY_WITH_PARENT,
+                                       GTK_MESSAGE_INFO,
+                                       GTK_BUTTONS_CLOSE, "%s", license_text);
+       g_signal_connect_swapped(GTK_OBJECT(dialog), "response",
+                                G_CALLBACK(gtk_widget_destroy),
+                                GTK_OBJECT(dialog));
+       gtk_widget_show_all(dialog);
+}
+
+
+void on_back_clicked(GtkButton * button, gpointer user_data)
+{
+       enum prop_type ptype;
+
+       current = current->parent;
+       ptype = current->prompt ? current->prompt->type : P_UNKNOWN;
+       if (ptype != P_MENU)
+               current = current->parent;
+       display_tree_part();
+
+       if (current == &rootmenu)
+               gtk_widget_set_sensitive(back_btn, FALSE);
+}
+
+
+void on_load_clicked(GtkButton * button, gpointer user_data)
+{
+       on_load1_activate(NULL, user_data);
+}
+
+
+void on_single_clicked(GtkButton * button, gpointer user_data)
+{
+       view_mode = SINGLE_VIEW;
+       gtk_widget_hide(tree1_w);
+       current = &rootmenu;
+       display_tree_part();
+}
+
+
+void on_split_clicked(GtkButton * button, gpointer user_data)
+{
+       gint w, h;
+       view_mode = SPLIT_VIEW;
+       gtk_widget_show(tree1_w);
+       gtk_window_get_default_size(GTK_WINDOW(main_wnd), &w, &h);
+       gtk_paned_set_position(GTK_PANED(hpaned), w / 2);
+       if (tree2)
+               gtk_tree_store_clear(tree2);
+       display_list();
+
+       /* Disable back btn, like in full mode. */
+       gtk_widget_set_sensitive(back_btn, FALSE);
+}
+
+
+void on_full_clicked(GtkButton * button, gpointer user_data)
+{
+       view_mode = FULL_VIEW;
+       gtk_widget_hide(tree1_w);
+       if (tree2)
+               gtk_tree_store_clear(tree2);
+       display_tree(&rootmenu);
+       gtk_widget_set_sensitive(back_btn, FALSE);
+}
+
+
+void on_collapse_clicked(GtkButton * button, gpointer user_data)
+{
+       gtk_tree_view_collapse_all(GTK_TREE_VIEW(tree2_w));
+}
+
+
+void on_expand_clicked(GtkButton * button, gpointer user_data)
+{
+       gtk_tree_view_expand_all(GTK_TREE_VIEW(tree2_w));
+}
+
+
+/* CTree Callbacks */
+
+/* Change hex/int/string value in the cell */
+static void renderer_edited(GtkCellRendererText * cell,
+                           const gchar * path_string,
+                           const gchar * new_text, gpointer user_data)
+{
+       GtkTreePath *path = gtk_tree_path_new_from_string(path_string);
+       GtkTreeIter iter;
+       const char *old_def, *new_def;
+       struct menu *menu;
+       struct symbol *sym;
+
+       if (!gtk_tree_model_get_iter(model2, &iter, path))
+               return;
+
+       gtk_tree_model_get(model2, &iter, COL_MENU, &menu, -1);
+       sym = menu->sym;
+
+       gtk_tree_model_get(model2, &iter, COL_VALUE, &old_def, -1);
+       new_def = new_text;
+
+       sym_set_string_value(sym, new_def);
+
+       update_tree(&rootmenu, NULL);
+
+       gtk_tree_path_free(path);
+}
+
+/* Change the value of a symbol and update the tree */
+static void change_sym_value(struct menu *menu, gint col)
+{
+       struct symbol *sym = menu->sym;
+       tristate newval;
+
+       if (!sym)
+               return;
+
+       if (col == COL_NO)
+               newval = no;
+       else if (col == COL_MOD)
+               newval = mod;
+       else if (col == COL_YES)
+               newval = yes;
+       else
+               return;
+
+       switch (sym_get_type(sym)) {
+       case S_BOOLEAN:
+       case S_TRISTATE:
+               if (!sym_tristate_within_range(sym, newval))
+                       newval = yes;
+               sym_set_tristate_value(sym, newval);
+               if (view_mode == FULL_VIEW)
+                       update_tree(&rootmenu, NULL);
+               else if (view_mode == SPLIT_VIEW) {
+                       update_tree(browsed, NULL);
+                       display_list();
+               }
+               else if (view_mode == SINGLE_VIEW)
+                       display_tree_part();    //fixme: keep exp/coll
+               break;
+       case S_INT:
+       case S_HEX:
+       case S_STRING:
+       default:
+               break;
+       }
+}
+
+static void toggle_sym_value(struct menu *menu)
+{
+       if (!menu->sym)
+               return;
+
+       sym_toggle_tristate_value(menu->sym);
+       if (view_mode == FULL_VIEW)
+               update_tree(&rootmenu, NULL);
+       else if (view_mode == SPLIT_VIEW) {
+               update_tree(browsed, NULL);
+               display_list();
+       }
+       else if (view_mode == SINGLE_VIEW)
+               display_tree_part();    //fixme: keep exp/coll
+}
+
+static gint column2index(GtkTreeViewColumn * column)
+{
+       gint i;
+
+       for (i = 0; i < COL_NUMBER; i++) {
+               GtkTreeViewColumn *col;
+
+               col = gtk_tree_view_get_column(GTK_TREE_VIEW(tree2_w), i);
+               if (col == column)
+                       return i;
+       }
+
+       return -1;
+}
+
+
+/* User click: update choice (full) or goes down (single) */
+gboolean
+on_treeview2_button_press_event(GtkWidget * widget,
+                               GdkEventButton * event, gpointer user_data)
+{
+       GtkTreeView *view = GTK_TREE_VIEW(widget);
+       GtkTreePath *path;
+       GtkTreeViewColumn *column;
+       GtkTreeIter iter;
+       struct menu *menu;
+       gint col;
+
+#if GTK_CHECK_VERSION(2,1,4) // bug in ctree with earlier version of GTK
+       gint tx = (gint) event->x;
+       gint ty = (gint) event->y;
+       gint cx, cy;
+
+       gtk_tree_view_get_path_at_pos(view, tx, ty, &path, &column, &cx,
+                                     &cy);
+#else
+       gtk_tree_view_get_cursor(view, &path, &column);
+#endif
+       if (path == NULL)
+               return FALSE;
+
+       if (!gtk_tree_model_get_iter(model2, &iter, path))
+               return FALSE;
+       gtk_tree_model_get(model2, &iter, COL_MENU, &menu, -1);
+
+       col = column2index(column);
+       if (event->type == GDK_2BUTTON_PRESS) {
+               enum prop_type ptype;
+               ptype = menu->prompt ? menu->prompt->type : P_UNKNOWN;
+
+               if (ptype == P_MENU && view_mode != FULL_VIEW && col == 
COL_OPTION) {
+                       // goes down into menu
+                       current = menu;
+                       display_tree_part();
+                       gtk_widget_set_sensitive(back_btn, TRUE);
+               } else if ((col == COL_OPTION)) {
+                       toggle_sym_value(menu);
+                       gtk_tree_view_expand_row(view, path, TRUE);
+               }
+       } else {
+               if (col == COL_VALUE) {
+                       toggle_sym_value(menu);
+                       gtk_tree_view_expand_row(view, path, TRUE);
+               } else if (col == COL_NO || col == COL_MOD
+                          || col == COL_YES) {
+                       change_sym_value(menu, col);
+                       gtk_tree_view_expand_row(view, path, TRUE);
+               }
+       }
+
+       return FALSE;
+}
+
+/* Key pressed: update choice */
+gboolean
+on_treeview2_key_press_event(GtkWidget * widget,
+                            GdkEventKey * event, gpointer user_data)
+{
+       GtkTreeView *view = GTK_TREE_VIEW(widget);
+       GtkTreePath *path;
+       GtkTreeViewColumn *column;
+       GtkTreeIter iter;
+       struct menu *menu;
+       gint col;
+
+       gtk_tree_view_get_cursor(view, &path, &column);
+       if (path == NULL)
+               return FALSE;
+
+       if (event->keyval == GDK_space) {
+               if (gtk_tree_view_row_expanded(view, path))
+                       gtk_tree_view_collapse_row(view, path);
+               else
+                       gtk_tree_view_expand_row(view, path, FALSE);
+               return TRUE;
+       }
+       if (event->keyval == GDK_KP_Enter) {
+       }
+       if (widget == tree1_w)
+               return FALSE;
+
+       gtk_tree_model_get_iter(model2, &iter, path);
+       gtk_tree_model_get(model2, &iter, COL_MENU, &menu, -1);
+
+       if (!strcasecmp(event->string, "n"))
+               col = COL_NO;
+       else if (!strcasecmp(event->string, "m"))
+               col = COL_MOD;
+       else if (!strcasecmp(event->string, "y"))
+               col = COL_YES;
+       else
+               col = -1;
+       change_sym_value(menu, col);
+
+       return FALSE;
+}
+
+
+/* Row selection changed: update help */
+void
+on_treeview2_cursor_changed(GtkTreeView * treeview, gpointer user_data)
+{
+       GtkTreeSelection *selection;
+       GtkTreeIter iter;
+       struct menu *menu;
+
+       selection = gtk_tree_view_get_selection(treeview);
+       if (gtk_tree_selection_get_selected(selection, &model2, &iter)) {
+               gtk_tree_model_get(model2, &iter, COL_MENU, &menu, -1);
+               text_insert_help(menu);
+       }
+}
+
+
+/* User click: display sub-tree in the right frame. */
+gboolean
+on_treeview1_button_press_event(GtkWidget * widget,
+                               GdkEventButton * event, gpointer user_data)
+{
+       GtkTreeView *view = GTK_TREE_VIEW(widget);
+       GtkTreePath *path;
+       GtkTreeViewColumn *column;
+       GtkTreeIter iter;
+       struct menu *menu;
+
+       gint tx = (gint) event->x;
+       gint ty = (gint) event->y;
+       gint cx, cy;
+
+       gtk_tree_view_get_path_at_pos(view, tx, ty, &path, &column, &cx,
+                                     &cy);
+       if (path == NULL)
+               return FALSE;
+
+       gtk_tree_model_get_iter(model1, &iter, path);
+       gtk_tree_model_get(model1, &iter, COL_MENU, &menu, -1);
+
+       if (event->type == GDK_2BUTTON_PRESS) {
+               toggle_sym_value(menu);
+               current = menu;
+               display_tree_part();
+       } else {
+               browsed = menu;
+               display_tree_part();
+       }
+
+       gtk_widget_realize(tree2_w);
+       gtk_tree_view_set_cursor(view, path, NULL, FALSE);
+       gtk_widget_grab_focus(tree2_w);
+
+       return FALSE;
+}
+
+
+/* Fill a row of strings */
+static gchar **fill_row(struct menu *menu)
+{
+       static gchar *row[COL_NUMBER];
+       struct symbol *sym = menu->sym;
+       const char *def;
+       int stype;
+       tristate val;
+       enum prop_type ptype;
+       int i;
+
+       for (i = COL_OPTION; i <= COL_COLOR; i++)
+               g_free(row[i]);
+       bzero(row, sizeof(row));
+
+       row[COL_OPTION] =
+           g_strdup_printf("%s %s", _(menu_get_prompt(menu)),
+                           sym && !sym_has_value(sym) ? "(NEW)" : "");
+
+       if (opt_mode == OPT_ALL && !menu_is_visible(menu))
+               row[COL_COLOR] = g_strdup("DarkGray");
+       else if (opt_mode == OPT_PROMPT &&
+                       menu_has_prompt(menu) && !menu_is_visible(menu))
+               row[COL_COLOR] = g_strdup("DarkGray");
+       else
+               row[COL_COLOR] = g_strdup("Black");
+
+       ptype = menu->prompt ? menu->prompt->type : P_UNKNOWN;
+       switch (ptype) {
+       case P_MENU:
+               row[COL_PIXBUF] = (gchar *) xpm_menu;
+               if (view_mode == SINGLE_VIEW)
+                       row[COL_PIXVIS] = GINT_TO_POINTER(TRUE);
+               row[COL_BTNVIS] = GINT_TO_POINTER(FALSE);
+               break;
+       case P_COMMENT:
+               row[COL_PIXBUF] = (gchar *) xpm_void;
+               row[COL_PIXVIS] = GINT_TO_POINTER(FALSE);
+               row[COL_BTNVIS] = GINT_TO_POINTER(FALSE);
+               break;
+       default:
+               row[COL_PIXBUF] = (gchar *) xpm_void;
+               row[COL_PIXVIS] = GINT_TO_POINTER(FALSE);
+               row[COL_BTNVIS] = GINT_TO_POINTER(TRUE);
+               break;
+       }
+
+       if (!sym)
+               return row;
+       row[COL_NAME] = g_strdup(sym->name);
+
+       sym_calc_value(sym);
+       sym->flags &= ~SYMBOL_CHANGED;
+
+       if (sym_is_choice(sym)) {       // parse childs for getting final value
+               struct menu *child;
+               struct symbol *def_sym = sym_get_choice_value(sym);
+               struct menu *def_menu = NULL;
+
+               row[COL_BTNVIS] = GINT_TO_POINTER(FALSE);
+
+               for (child = menu->list; child; child = child->next) {
+                       if (menu_is_visible(child)
+                           && child->sym == def_sym)
+                               def_menu = child;
+               }
+
+               if (def_menu)
+                       row[COL_VALUE] =
+                           g_strdup(_(menu_get_prompt(def_menu)));
+       }
+       if (sym->flags & SYMBOL_CHOICEVAL)
+               row[COL_BTNRAD] = GINT_TO_POINTER(TRUE);
+
+       stype = sym_get_type(sym);
+       switch (stype) {
+       case S_BOOLEAN:
+               if (GPOINTER_TO_INT(row[COL_PIXVIS]) == FALSE)
+                       row[COL_BTNVIS] = GINT_TO_POINTER(TRUE);
+               if (sym_is_choice(sym))
+                       break;
+               /* fall through */
+       case S_TRISTATE:
+               val = sym_get_tristate_value(sym);
+               switch (val) {
+               case no:
+                       row[COL_NO] = g_strdup("N");
+                       row[COL_VALUE] = g_strdup("N");
+                       row[COL_BTNACT] = GINT_TO_POINTER(FALSE);
+                       row[COL_BTNINC] = GINT_TO_POINTER(FALSE);
+                       break;
+               case mod:
+                       row[COL_MOD] = g_strdup("M");
+                       row[COL_VALUE] = g_strdup("M");
+                       row[COL_BTNINC] = GINT_TO_POINTER(TRUE);
+                       break;
+               case yes:
+                       row[COL_YES] = g_strdup("Y");
+                       row[COL_VALUE] = g_strdup("Y");
+                       row[COL_BTNACT] = GINT_TO_POINTER(TRUE);
+                       row[COL_BTNINC] = GINT_TO_POINTER(FALSE);
+                       break;
+               }
+
+               if (val != no && sym_tristate_within_range(sym, no))
+                       row[COL_NO] = g_strdup("_");
+               if (val != mod && sym_tristate_within_range(sym, mod))
+                       row[COL_MOD] = g_strdup("_");
+               if (val != yes && sym_tristate_within_range(sym, yes))
+                       row[COL_YES] = g_strdup("_");
+               break;
+       case S_INT:
+       case S_HEX:
+       case S_STRING:
+               def = sym_get_string_value(sym);
+               row[COL_VALUE] = g_strdup(def);
+               row[COL_EDIT] = GINT_TO_POINTER(TRUE);
+               row[COL_BTNVIS] = GINT_TO_POINTER(FALSE);
+               break;
+       }
+
+       return row;
+}
+
+
+/* Set the node content with a row of strings */
+static void set_node(GtkTreeIter * node, struct menu *menu, gchar ** row)
+{
+       GdkColor color;
+       gboolean success;
+       GdkPixbuf *pix;
+
+       pix = gdk_pixbuf_new_from_xpm_data((const char **)
+                                          row[COL_PIXBUF]);
+
+       gdk_color_parse(row[COL_COLOR], &color);
+       gdk_colormap_alloc_colors(gdk_colormap_get_system(), &color, 1,
+                                 FALSE, FALSE, &success);
+
+       gtk_tree_store_set(tree, node,
+                          COL_OPTION, row[COL_OPTION],
+                          COL_NAME, row[COL_NAME],
+                          COL_NO, row[COL_NO],
+                          COL_MOD, row[COL_MOD],
+                          COL_YES, row[COL_YES],
+                          COL_VALUE, row[COL_VALUE],
+                          COL_MENU, (gpointer) menu,
+                          COL_COLOR, &color,
+                          COL_EDIT, GPOINTER_TO_INT(row[COL_EDIT]),
+                          COL_PIXBUF, pix,
+                          COL_PIXVIS, GPOINTER_TO_INT(row[COL_PIXVIS]),
+                          COL_BTNVIS, GPOINTER_TO_INT(row[COL_BTNVIS]),
+                          COL_BTNACT, GPOINTER_TO_INT(row[COL_BTNACT]),
+                          COL_BTNINC, GPOINTER_TO_INT(row[COL_BTNINC]),
+                          COL_BTNRAD, GPOINTER_TO_INT(row[COL_BTNRAD]),
+                          -1);
+
+       g_object_unref(pix);
+}
+
+
+/* Add a node to the tree */
+static void place_node(struct menu *menu, char **row)
+{
+       GtkTreeIter *parent = parents[indent - 1];
+       GtkTreeIter *node = parents[indent];
+
+       gtk_tree_store_append(tree, node, parent);
+       set_node(node, menu, row);
+}
+
+
+/* Find a node in the GTK+ tree */
+static GtkTreeIter found;
+
+/*
+ * Find a menu in the GtkTree starting at parent.
+ */
+GtkTreeIter *gtktree_iter_find_node(GtkTreeIter * parent,
+                                   struct menu *tofind)
+{
+       GtkTreeIter iter;
+       GtkTreeIter *child = &iter;
+       gboolean valid;
+       GtkTreeIter *ret;
+
+       valid = gtk_tree_model_iter_children(model2, child, parent);
+       while (valid) {
+               struct menu *menu;
+
+               gtk_tree_model_get(model2, child, 6, &menu, -1);
+
+               if (menu == tofind) {
+                       memcpy(&found, child, sizeof(GtkTreeIter));
+                       return &found;
+               }
+
+               ret = gtktree_iter_find_node(child, tofind);
+               if (ret)
+                       return ret;
+
+               valid = gtk_tree_model_iter_next(model2, child);
+       }
+
+       return NULL;
+}
+
+
+/*
+ * Update the tree by adding/removing entries
+ * Does not change other nodes
+ */
+static void update_tree(struct menu *src, GtkTreeIter * dst)
+{
+       struct menu *child1;
+       GtkTreeIter iter, tmp;
+       GtkTreeIter *child2 = &iter;
+       gboolean valid;
+       GtkTreeIter *sibling;
+       struct symbol *sym;
+       struct menu *menu1, *menu2;
+
+       if (src == &rootmenu)
+               indent = 1;
+
+       valid = gtk_tree_model_iter_children(model2, child2, dst);
+       for (child1 = src->list; child1; child1 = child1->next) {
+
+               sym = child1->sym;
+
+             reparse:
+               menu1 = child1;
+               if (valid)
+                       gtk_tree_model_get(model2, child2, COL_MENU,
+                                          &menu2, -1);
+               else
+                       menu2 = NULL;   // force adding of a first child
+
+#ifdef DEBUG
+               printf("%*c%s | %s\n", indent, ' ',
+                      menu1 ? menu_get_prompt(menu1) : "nil",
+                      menu2 ? menu_get_prompt(menu2) : "nil");
+#endif
+
+               if ((opt_mode == OPT_NORMAL && !menu_is_visible(child1)) ||
+                   (opt_mode == OPT_PROMPT && !menu_has_prompt(child1)) ||
+                   (opt_mode == OPT_ALL    && !menu_get_prompt(child1))) {
+
+                       /* remove node */
+                       if (gtktree_iter_find_node(dst, menu1) != NULL) {
+                               memcpy(&tmp, child2, sizeof(GtkTreeIter));
+                               valid = gtk_tree_model_iter_next(model2,
+                                                                child2);
+                               gtk_tree_store_remove(tree2, &tmp);
+                               if (!valid)
+                                       return;         /* next parent */
+                               else
+                                       goto reparse;   /* next child */
+                       } else
+                               continue;
+               }
+
+               if (menu1 != menu2) {
+                       if (gtktree_iter_find_node(dst, menu1) == NULL) {       
// add node
+                               if (!valid && !menu2)
+                                       sibling = NULL;
+                               else
+                                       sibling = child2;
+                               gtk_tree_store_insert_before(tree2,
+                                                            child2,
+                                                            dst, sibling);
+                               set_node(child2, menu1, fill_row(menu1));
+                               if (menu2 == NULL)
+                                       valid = TRUE;
+                       } else {        // remove node
+                               memcpy(&tmp, child2, sizeof(GtkTreeIter));
+                               valid = gtk_tree_model_iter_next(model2,
+                                                                child2);
+                               gtk_tree_store_remove(tree2, &tmp);
+                               if (!valid)
+                                       return; // next parent
+                               else
+                                       goto reparse;   // next child
+                       }
+               } else if (sym && (sym->flags & SYMBOL_CHANGED)) {
+                       set_node(child2, menu1, fill_row(menu1));
+               }
+
+               indent++;
+               update_tree(child1, child2);
+               indent--;
+
+               valid = gtk_tree_model_iter_next(model2, child2);
+       }
+}
+
+
+/* Display the whole tree (single/split/full view) */
+static void display_tree(struct menu *menu)
+{
+       struct symbol *sym;
+       struct property *prop;
+       struct menu *child;
+       enum prop_type ptype;
+
+       if (menu == &rootmenu) {
+               indent = 1;
+               current = &rootmenu;
+       }
+
+       for (child = menu->list; child; child = child->next) {
+               prop = child->prompt;
+               sym = child->sym;
+               ptype = prop ? prop->type : P_UNKNOWN;
+
+               if (sym)
+                       sym->flags &= ~SYMBOL_CHANGED;
+
+               if ((view_mode == SPLIT_VIEW)
+                   && !(child->flags & MENU_ROOT) && (tree == tree1))
+                       continue;
+
+               if ((view_mode == SPLIT_VIEW) && (child->flags & MENU_ROOT)
+                   && (tree == tree2))
+                       continue;
+
+               if ((opt_mode == OPT_NORMAL && menu_is_visible(child)) ||
+                   (opt_mode == OPT_PROMPT && menu_has_prompt(child)) ||
+                   (opt_mode == OPT_ALL    && menu_get_prompt(child)))
+                       place_node(child, fill_row(child));
+#ifdef DEBUG
+               printf("%*c%s: ", indent, ' ', menu_get_prompt(child));
+               printf("%s", child->flags & MENU_ROOT ? "rootmenu | " : "");
+               printf("%s", prop_get_type_name(ptype));
+               printf(" | ");
+               if (sym) {
+                       printf("%s", sym_type_name(sym->type));
+                       printf(" | ");
+                       printf("%s", dbg_sym_flags(sym->flags));
+                       printf("\n");
+               } else
+                       printf("\n");
+#endif
+               if ((view_mode != FULL_VIEW) && (ptype == P_MENU)
+                   && (tree == tree2))
+                       continue;
+/*
+               if (((menu != &rootmenu) && !(menu->flags & MENU_ROOT))
+                   || (view_mode == FULL_VIEW)
+                   || (view_mode == SPLIT_VIEW))*/
+
+               /* Change paned position if the view is not in 'split mode' */
+               if (view_mode == SINGLE_VIEW || view_mode == FULL_VIEW) {
+                       gtk_paned_set_position(GTK_PANED(hpaned), 0);
+               }
+
+               if (((view_mode == SINGLE_VIEW) && (menu->flags & MENU_ROOT))
+                   || (view_mode == FULL_VIEW)
+                   || (view_mode == SPLIT_VIEW)) {
+                       indent++;
+                       display_tree(child);
+                       indent--;
+               }
+       }
+}
+
+/* Display a part of the tree starting at current node (single/split view) */
+static void display_tree_part(void)
+{
+       if (tree2)
+               gtk_tree_store_clear(tree2);
+       if (view_mode == SINGLE_VIEW)
+               display_tree(current);
+       else if (view_mode == SPLIT_VIEW)
+               display_tree(browsed);
+       gtk_tree_view_expand_all(GTK_TREE_VIEW(tree2_w));
+}
+
+/* Display the list in the left frame (split view) */
+static void display_list(void)
+{
+       if (tree1)
+               gtk_tree_store_clear(tree1);
+
+       tree = tree1;
+       display_tree(&rootmenu);
+       gtk_tree_view_expand_all(GTK_TREE_VIEW(tree1_w));
+       tree = tree2;
+}
+
+void fixup_rootmenu(struct menu *menu)
+{
+       struct menu *child;
+       static int menu_cnt = 0;
+
+       menu->flags |= MENU_ROOT;
+       for (child = menu->list; child; child = child->next) {
+               if (child->prompt && child->prompt->type == P_MENU) {
+                       menu_cnt++;
+                       fixup_rootmenu(child);
+                       menu_cnt--;
+               } else if (!menu_cnt)
+                       fixup_rootmenu(child);
+       }
+}
+
+
+/* Main */
+int main(int ac, char *av[])
+{
+       const char *name;
+       char *env;
+       gchar *glade_file;
+
+       bindtextdomain(PACKAGE, LOCALEDIR);
+       bind_textdomain_codeset(PACKAGE, "UTF-8");
+       textdomain(PACKAGE);
+
+       /* GTK stuffs */
+       gtk_set_locale();
+       gtk_init(&ac, &av);
+       glade_init();
+
+       //add_pixmap_directory (PACKAGE_DATA_DIR "/" PACKAGE "/pixmaps");
+       //add_pixmap_directory (PACKAGE_SOURCE_DIR "/pixmaps");
+
+       /* Determine GUI path */
+       env = getenv(SRCTREE);
+       if (env)
+               glade_file = g_strconcat(env, "/scripts/kconfig/gconf.glade", 
NULL);
+       else if (av[0][0] == '/')
+               glade_file = g_strconcat(av[0], ".glade", NULL);
+       else
+               glade_file = g_strconcat(g_get_current_dir(), "/", av[0], 
".glade", NULL);
+
+       /* Conf stuffs */
+       if (ac > 1 && av[1][0] == '-') {
+               switch (av[1][1]) {
+               case 'a':
+                       //showAll = 1;
+                       break;
+               case 's':
+                       conf_set_message_callback(NULL);
+                       break;
+               case 'h':
+               case '?':
+                       printf("%s [-s] <config>\n", av[0]);
+                       exit(0);
+               }
+               name = av[2];
+       } else
+               name = av[1];
+
+       conf_parse(name);
+       fixup_rootmenu(&rootmenu);
+       conf_read(NULL);
+
+       /* Load the interface and connect signals */
+       init_main_window(glade_file);
+       init_tree_model();
+       init_left_tree();
+       init_right_tree();
+
+       switch (view_mode) {
+       case SINGLE_VIEW:
+               display_tree_part();
+               break;
+       case SPLIT_VIEW:
+               display_list();
+               break;
+       case FULL_VIEW:
+               display_tree(&rootmenu);
+               break;
+       }
+
+       gtk_main();
+
+       return 0;
+}
+
+static void conf_changed(void)
+{
+       bool changed = conf_get_changed();
+       gtk_widget_set_sensitive(save_btn, changed);
+       gtk_widget_set_sensitive(save_menu_item, changed);
+}
diff --git a/xen/tools/kconfig/gconf.glade b/xen/tools/kconfig/gconf.glade
new file mode 100644
index 0000000..aa483cb
--- /dev/null
+++ b/xen/tools/kconfig/gconf.glade
@@ -0,0 +1,661 @@
+<?xml version="1.0" standalone="no"?> <!--*- mode: xml -*-->
+
+<glade-interface>
+
+<widget class="GtkWindow" id="window1">
+  <property name="visible">True</property>
+  <property name="title" translatable="yes">Gtk Kernel Configurator</property>
+  <property name="type">GTK_WINDOW_TOPLEVEL</property>
+  <property name="window_position">GTK_WIN_POS_NONE</property>
+  <property name="modal">False</property>
+  <property name="default_width">640</property>
+  <property name="default_height">480</property>
+  <property name="resizable">True</property>
+  <property name="destroy_with_parent">False</property>
+  <property name="decorated">True</property>
+  <property name="skip_taskbar_hint">False</property>
+  <property name="skip_pager_hint">False</property>
+  <property name="type_hint">GDK_WINDOW_TYPE_HINT_NORMAL</property>
+  <property name="gravity">GDK_GRAVITY_NORTH_WEST</property>
+  <signal name="destroy" handler="on_window1_destroy" object="window1"/>
+  <signal name="size_request" handler="on_window1_size_request" 
object="vpaned1" last_modification_time="Fri, 11 Jan 2002 16:17:11 GMT"/>
+  <signal name="delete_event" handler="on_window1_delete_event" 
object="window1" last_modification_time="Sun, 09 Mar 2003 19:42:46 GMT"/>
+
+  <child>
+    <widget class="GtkVBox" id="vbox1">
+      <property name="visible">True</property>
+      <property name="homogeneous">False</property>
+      <property name="spacing">0</property>
+
+      <child>
+       <widget class="GtkMenuBar" id="menubar1">
+         <property name="visible">True</property>
+
+         <child>
+           <widget class="GtkMenuItem" id="file1">
+             <property name="visible">True</property>
+             <property name="label" translatable="yes">_File</property>
+             <property name="use_underline">True</property>
+
+             <child>
+               <widget class="GtkMenu" id="file1_menu">
+
+                 <child>
+                   <widget class="GtkImageMenuItem" id="load1">
+                     <property name="visible">True</property>
+                     <property name="tooltip" translatable="yes">Load a config 
file</property>
+                     <property name="label" translatable="yes">_Load</property>
+                     <property name="use_underline">True</property>
+                     <signal name="activate" handler="on_load1_activate"/>
+                     <accelerator key="L" modifiers="GDK_CONTROL_MASK" 
signal="activate"/>
+
+                     <child internal-child="image">
+                       <widget class="GtkImage" id="image39">
+                         <property name="visible">True</property>
+                         <property name="stock">gtk-open</property>
+                         <property name="icon_size">1</property>
+                         <property name="xalign">0.5</property>
+                         <property name="yalign">0.5</property>
+                         <property name="xpad">0</property>
+                         <property name="ypad">0</property>
+                       </widget>
+                     </child>
+                   </widget>
+                 </child>
+
+                 <child>
+                   <widget class="GtkImageMenuItem" id="save1">
+                     <property name="visible">True</property>
+                     <property name="tooltip" translatable="yes">Save the 
config in .config</property>
+                     <property name="label" translatable="yes">_Save</property>
+                     <property name="use_underline">True</property>
+                     <signal name="activate" handler="on_save_activate"/>
+                     <accelerator key="S" modifiers="GDK_CONTROL_MASK" 
signal="activate"/>
+
+                     <child internal-child="image">
+                       <widget class="GtkImage" id="image40">
+                         <property name="visible">True</property>
+                         <property name="stock">gtk-save</property>
+                         <property name="icon_size">1</property>
+                         <property name="xalign">0.5</property>
+                         <property name="yalign">0.5</property>
+                         <property name="xpad">0</property>
+                         <property name="ypad">0</property>
+                       </widget>
+                     </child>
+                   </widget>
+                 </child>
+
+                 <child>
+                   <widget class="GtkImageMenuItem" id="save_as1">
+                     <property name="visible">True</property>
+                     <property name="tooltip" translatable="yes">Save the 
config in a file</property>
+                     <property name="label" translatable="yes">Save 
_as</property>
+                     <property name="use_underline">True</property>
+                     <signal name="activate" handler="on_save_as1_activate"/>
+
+                     <child internal-child="image">
+                       <widget class="GtkImage" id="image41">
+                         <property name="visible">True</property>
+                         <property name="stock">gtk-save-as</property>
+                         <property name="icon_size">1</property>
+                         <property name="xalign">0.5</property>
+                         <property name="yalign">0.5</property>
+                         <property name="xpad">0</property>
+                         <property name="ypad">0</property>
+                       </widget>
+                     </child>
+                   </widget>
+                 </child>
+
+                 <child>
+                   <widget class="GtkSeparatorMenuItem" id="separator1">
+                     <property name="visible">True</property>
+                   </widget>
+                 </child>
+
+                 <child>
+                   <widget class="GtkImageMenuItem" id="quit1">
+                     <property name="visible">True</property>
+                     <property name="label" translatable="yes">_Quit</property>
+                     <property name="use_underline">True</property>
+                     <signal name="activate" handler="on_quit1_activate"/>
+                     <accelerator key="Q" modifiers="GDK_CONTROL_MASK" 
signal="activate"/>
+
+                     <child internal-child="image">
+                       <widget class="GtkImage" id="image42">
+                         <property name="visible">True</property>
+                         <property name="stock">gtk-quit</property>
+                         <property name="icon_size">1</property>
+                         <property name="xalign">0.5</property>
+                         <property name="yalign">0.5</property>
+                         <property name="xpad">0</property>
+                         <property name="ypad">0</property>
+                       </widget>
+                     </child>
+                   </widget>
+                 </child>
+               </widget>
+             </child>
+           </widget>
+         </child>
+
+         <child>
+           <widget class="GtkMenuItem" id="options1">
+             <property name="visible">True</property>
+             <property name="label" translatable="yes">_Options</property>
+             <property name="use_underline">True</property>
+
+             <child>
+               <widget class="GtkMenu" id="options1_menu">
+
+                 <child>
+                   <widget class="GtkCheckMenuItem" id="show_name1">
+                     <property name="visible">True</property>
+                     <property name="tooltip" translatable="yes">Show 
name</property>
+                     <property name="label" translatable="yes">Show 
_name</property>
+                     <property name="use_underline">True</property>
+                     <property name="active">False</property>
+                     <signal name="activate" handler="on_show_name1_activate"/>
+                   </widget>
+                 </child>
+
+                 <child>
+                   <widget class="GtkCheckMenuItem" id="show_range1">
+                     <property name="visible">True</property>
+                     <property name="tooltip" translatable="yes">Show range 
(Y/M/N)</property>
+                     <property name="label" translatable="yes">Show 
_range</property>
+                     <property name="use_underline">True</property>
+                     <property name="active">False</property>
+                     <signal name="activate" 
handler="on_show_range1_activate"/>
+                   </widget>
+                 </child>
+
+                 <child>
+                   <widget class="GtkCheckMenuItem" id="show_data1">
+                     <property name="visible">True</property>
+                     <property name="tooltip" translatable="yes">Show value of 
the option</property>
+                     <property name="label" translatable="yes">Show 
_data</property>
+                     <property name="use_underline">True</property>
+                     <property name="active">False</property>
+                     <signal name="activate" handler="on_show_data1_activate"/>
+                   </widget>
+                 </child>
+
+                 <child>
+                   <widget class="GtkSeparatorMenuItem" id="separator2">
+                     <property name="visible">True</property>
+                   </widget>
+                 </child>
+
+                 <child>
+                   <widget class="GtkRadioMenuItem" id="set_option_mode1">
+                     <property name="visible">True</property>
+                     <property name="tooltip" translatable="yes">Show normal 
options</property>
+                     <property name="label" translatable="yes">Show normal 
options</property>
+                     <property name="use_underline">True</property>
+                     <property name="active">True</property>
+                     <signal name="activate" 
handler="on_set_option_mode1_activate"/>
+                   </widget>
+                 </child>
+
+                 <child>
+                   <widget class="GtkRadioMenuItem" id="set_option_mode2">
+                     <property name="visible">True</property>
+                     <property name="tooltip" translatable="yes">Show all 
options</property>
+                     <property name="label" translatable="yes">Show all 
_options</property>
+                     <property name="use_underline">True</property>
+                     <property name="active">False</property>
+                     <property name="group">set_option_mode1</property>
+                     <signal name="activate" 
handler="on_set_option_mode2_activate"/>
+                   </widget>
+                 </child>
+
+                 <child>
+                   <widget class="GtkRadioMenuItem" id="set_option_mode3">
+                     <property name="visible">True</property>
+                     <property name="tooltip" translatable="yes">Show all 
options with prompts</property>
+                     <property name="label" translatable="yes">Show all prompt 
options</property>
+                     <property name="use_underline">True</property>
+                     <property name="active">False</property>
+                     <property name="group">set_option_mode1</property>
+                     <signal name="activate" 
handler="on_set_option_mode3_activate"/>
+                   </widget>
+                 </child>
+
+               </widget>
+             </child>
+           </widget>
+         </child>
+
+         <child>
+           <widget class="GtkMenuItem" id="help1">
+             <property name="visible">True</property>
+             <property name="label" translatable="yes">_Help</property>
+             <property name="use_underline">True</property>
+
+             <child>
+               <widget class="GtkMenu" id="help1_menu">
+
+                 <child>
+                   <widget class="GtkImageMenuItem" id="introduction1">
+                     <property name="visible">True</property>
+                     <property name="label" 
translatable="yes">_Introduction</property>
+                     <property name="use_underline">True</property>
+                     <signal name="activate" 
handler="on_introduction1_activate" last_modification_time="Fri, 15 Nov 2002 
20:26:30 GMT"/>
+                     <accelerator key="I" modifiers="GDK_CONTROL_MASK" 
signal="activate"/>
+
+                     <child internal-child="image">
+                       <widget class="GtkImage" id="image43">
+                         <property name="visible">True</property>
+                         <property name="stock">gtk-dialog-question</property>
+                         <property name="icon_size">1</property>
+                         <property name="xalign">0.5</property>
+                         <property name="yalign">0.5</property>
+                         <property name="xpad">0</property>
+                         <property name="ypad">0</property>
+                       </widget>
+                     </child>
+                   </widget>
+                 </child>
+
+                 <child>
+                   <widget class="GtkImageMenuItem" id="about1">
+                     <property name="visible">True</property>
+                     <property name="label" 
translatable="yes">_About</property>
+                     <property name="use_underline">True</property>
+                     <signal name="activate" handler="on_about1_activate" 
last_modification_time="Fri, 15 Nov 2002 20:26:30 GMT"/>
+                     <accelerator key="A" modifiers="GDK_CONTROL_MASK" 
signal="activate"/>
+
+                     <child internal-child="image">
+                       <widget class="GtkImage" id="image44">
+                         <property name="visible">True</property>
+                         <property name="stock">gtk-properties</property>
+                         <property name="icon_size">1</property>
+                         <property name="xalign">0.5</property>
+                         <property name="yalign">0.5</property>
+                         <property name="xpad">0</property>
+                         <property name="ypad">0</property>
+                       </widget>
+                     </child>
+                   </widget>
+                 </child>
+
+                 <child>
+                   <widget class="GtkImageMenuItem" id="license1">
+                     <property name="visible">True</property>
+                     <property name="label" 
translatable="yes">_License</property>
+                     <property name="use_underline">True</property>
+                     <signal name="activate" handler="on_license1_activate" 
last_modification_time="Fri, 15 Nov 2002 20:26:30 GMT"/>
+
+                     <child internal-child="image">
+                       <widget class="GtkImage" id="image45">
+                         <property name="visible">True</property>
+                         <property name="stock">gtk-justify-fill</property>
+                         <property name="icon_size">1</property>
+                         <property name="xalign">0.5</property>
+                         <property name="yalign">0.5</property>
+                         <property name="xpad">0</property>
+                         <property name="ypad">0</property>
+                       </widget>
+                     </child>
+                   </widget>
+                 </child>
+               </widget>
+             </child>
+           </widget>
+         </child>
+       </widget>
+       <packing>
+         <property name="padding">0</property>
+         <property name="expand">False</property>
+         <property name="fill">False</property>
+       </packing>
+      </child>
+
+      <child>
+       <widget class="GtkHandleBox" id="handlebox1">
+         <property name="visible">True</property>
+         <property name="shadow_type">GTK_SHADOW_OUT</property>
+         <property name="handle_position">GTK_POS_LEFT</property>
+         <property name="snap_edge">GTK_POS_TOP</property>
+
+         <child>
+           <widget class="GtkToolbar" id="toolbar1">
+             <property name="visible">True</property>
+             <property name="orientation">GTK_ORIENTATION_HORIZONTAL</property>
+             <property name="toolbar_style">GTK_TOOLBAR_BOTH</property>
+             <property name="tooltips">True</property>
+             <property name="show_arrow">True</property>
+
+             <child>
+               <widget class="GtkToolButton" id="button1">
+                 <property name="visible">True</property>
+                 <property name="tooltip" translatable="yes">Goes up of one 
level (single view)</property>
+                 <property name="label" translatable="yes">Back</property>
+                 <property name="use_underline">True</property>
+                 <property name="stock_id">gtk-undo</property>
+                 <property name="visible_horizontal">True</property>
+                 <property name="visible_vertical">True</property>
+                 <property name="is_important">False</property>
+                 <signal name="clicked" handler="on_back_clicked"/>
+               </widget>
+               <packing>
+                 <property name="expand">False</property>
+                 <property name="homogeneous">True</property>
+               </packing>
+             </child>
+
+             <child>
+               <widget class="GtkToolItem" id="toolitem1">
+                 <property name="visible">True</property>
+                 <property name="visible_horizontal">True</property>
+                 <property name="visible_vertical">True</property>
+                 <property name="is_important">False</property>
+
+                 <child>
+                   <widget class="GtkVSeparator" id="vseparator1">
+                     <property name="visible">True</property>
+                   </widget>
+                 </child>
+               </widget>
+               <packing>
+                 <property name="expand">False</property>
+                 <property name="homogeneous">False</property>
+               </packing>
+             </child>
+
+             <child>
+               <widget class="GtkToolButton" id="button2">
+                 <property name="visible">True</property>
+                 <property name="tooltip" translatable="yes">Load a config 
file</property>
+                 <property name="label" translatable="yes">Load</property>
+                 <property name="use_underline">True</property>
+                 <property name="stock_id">gtk-open</property>
+                 <property name="visible_horizontal">True</property>
+                 <property name="visible_vertical">True</property>
+                 <property name="is_important">False</property>
+                 <signal name="clicked" handler="on_load_clicked"/>
+               </widget>
+               <packing>
+                 <property name="expand">False</property>
+                 <property name="homogeneous">True</property>
+               </packing>
+             </child>
+
+             <child>
+               <widget class="GtkToolButton" id="button3">
+                 <property name="visible">True</property>
+                 <property name="tooltip" translatable="yes">Save a config 
file</property>
+                 <property name="label" translatable="yes">Save</property>
+                 <property name="use_underline">True</property>
+                 <property name="stock_id">gtk-save</property>
+                 <property name="visible_horizontal">True</property>
+                 <property name="visible_vertical">True</property>
+                 <property name="is_important">False</property>
+                 <signal name="clicked" handler="on_save_activate"/>
+               </widget>
+               <packing>
+                 <property name="expand">False</property>
+                 <property name="homogeneous">True</property>
+               </packing>
+             </child>
+
+             <child>
+               <widget class="GtkToolItem" id="toolitem2">
+                 <property name="visible">True</property>
+                 <property name="visible_horizontal">True</property>
+                 <property name="visible_vertical">True</property>
+                 <property name="is_important">False</property>
+
+                 <child>
+                   <widget class="GtkVSeparator" id="vseparator2">
+                     <property name="visible">True</property>
+                   </widget>
+                 </child>
+               </widget>
+               <packing>
+                 <property name="expand">False</property>
+                 <property name="homogeneous">False</property>
+               </packing>
+             </child>
+
+             <child>
+               <widget class="GtkToolButton" id="button4">
+                 <property name="visible">True</property>
+                 <property name="tooltip" translatable="yes">Single 
view</property>
+                 <property name="label" translatable="yes">Single</property>
+                 <property name="use_underline">True</property>
+                 <property name="stock_id">gtk-missing-image</property>
+                 <property name="visible_horizontal">True</property>
+                 <property name="visible_vertical">True</property>
+                 <property name="is_important">False</property>
+                 <signal name="clicked" handler="on_single_clicked" 
last_modification_time="Sun, 12 Jan 2003 14:28:39 GMT"/>
+               </widget>
+               <packing>
+                 <property name="expand">False</property>
+                 <property name="homogeneous">True</property>
+               </packing>
+             </child>
+
+             <child>
+               <widget class="GtkToolButton" id="button5">
+                 <property name="visible">True</property>
+                 <property name="tooltip" translatable="yes">Split 
view</property>
+                 <property name="label" translatable="yes">Split</property>
+                 <property name="use_underline">True</property>
+                 <property name="stock_id">gtk-missing-image</property>
+                 <property name="visible_horizontal">True</property>
+                 <property name="visible_vertical">True</property>
+                 <property name="is_important">False</property>
+                 <signal name="clicked" handler="on_split_clicked" 
last_modification_time="Sun, 12 Jan 2003 14:28:45 GMT"/>
+               </widget>
+               <packing>
+                 <property name="expand">False</property>
+                 <property name="homogeneous">True</property>
+               </packing>
+             </child>
+
+             <child>
+               <widget class="GtkToolButton" id="button6">
+                 <property name="visible">True</property>
+                 <property name="tooltip" translatable="yes">Full 
view</property>
+                 <property name="label" translatable="yes">Full</property>
+                 <property name="use_underline">True</property>
+                 <property name="stock_id">gtk-missing-image</property>
+                 <property name="visible_horizontal">True</property>
+                 <property name="visible_vertical">True</property>
+                 <property name="is_important">False</property>
+                 <signal name="clicked" handler="on_full_clicked" 
last_modification_time="Sun, 12 Jan 2003 14:28:50 GMT"/>
+               </widget>
+               <packing>
+                 <property name="expand">False</property>
+                 <property name="homogeneous">True</property>
+               </packing>
+             </child>
+
+             <child>
+               <widget class="GtkToolItem" id="toolitem3">
+                 <property name="visible">True</property>
+                 <property name="visible_horizontal">True</property>
+                 <property name="visible_vertical">True</property>
+                 <property name="is_important">False</property>
+
+                 <child>
+                   <widget class="GtkVSeparator" id="vseparator3">
+                     <property name="visible">True</property>
+                   </widget>
+                 </child>
+               </widget>
+               <packing>
+                 <property name="expand">False</property>
+                 <property name="homogeneous">False</property>
+               </packing>
+             </child>
+
+             <child>
+               <widget class="GtkToolButton" id="button7">
+                 <property name="visible">True</property>
+                 <property name="tooltip" translatable="yes">Collapse the 
whole tree in the right frame</property>
+                 <property name="label" translatable="yes">Collapse</property>
+                 <property name="use_underline">True</property>
+                 <property name="stock_id">gtk-remove</property>
+                 <property name="visible_horizontal">True</property>
+                 <property name="visible_vertical">True</property>
+                 <property name="is_important">False</property>
+                 <signal name="clicked" handler="on_collapse_clicked"/>
+               </widget>
+               <packing>
+                 <property name="expand">False</property>
+                 <property name="homogeneous">True</property>
+               </packing>
+             </child>
+
+             <child>
+               <widget class="GtkToolButton" id="button8">
+                 <property name="visible">True</property>
+                 <property name="tooltip" translatable="yes">Expand the whole 
tree in the right frame</property>
+                 <property name="label" translatable="yes">Expand</property>
+                 <property name="use_underline">True</property>
+                 <property name="stock_id">gtk-add</property>
+                 <property name="visible_horizontal">True</property>
+                 <property name="visible_vertical">True</property>
+                 <property name="is_important">False</property>
+                 <signal name="clicked" handler="on_expand_clicked"/>
+               </widget>
+               <packing>
+                 <property name="expand">False</property>
+                 <property name="homogeneous">True</property>
+               </packing>
+             </child>
+           </widget>
+         </child>
+       </widget>
+       <packing>
+         <property name="padding">0</property>
+         <property name="expand">False</property>
+         <property name="fill">False</property>
+       </packing>
+      </child>
+
+      <child>
+       <widget class="GtkHPaned" id="hpaned1">
+         <property name="width_request">1</property>
+         <property name="visible">True</property>
+         <property name="can_focus">True</property>
+         <property name="position">0</property>
+
+         <child>
+           <widget class="GtkScrolledWindow" id="scrolledwindow1">
+             <property name="visible">True</property>
+             <property name="hscrollbar_policy">GTK_POLICY_AUTOMATIC</property>
+             <property name="vscrollbar_policy">GTK_POLICY_AUTOMATIC</property>
+             <property name="shadow_type">GTK_SHADOW_IN</property>
+             <property name="window_placement">GTK_CORNER_TOP_LEFT</property>
+
+             <child>
+               <widget class="GtkTreeView" id="treeview1">
+                 <property name="visible">True</property>
+                 <property name="can_focus">True</property>
+                 <property name="headers_visible">True</property>
+                 <property name="rules_hint">False</property>
+                 <property name="reorderable">False</property>
+                 <property name="enable_search">False</property>
+                 <signal name="cursor_changed" 
handler="on_treeview2_cursor_changed" last_modification_time="Sun, 12 Jan 2003 
15:58:22 GMT"/>
+                 <signal name="button_press_event" 
handler="on_treeview1_button_press_event" last_modification_time="Sun, 12 Jan 
2003 16:03:52 GMT"/>
+                 <signal name="key_press_event" 
handler="on_treeview2_key_press_event" last_modification_time="Sun, 12 Jan 2003 
16:11:44 GMT"/>
+               </widget>
+             </child>
+           </widget>
+           <packing>
+             <property name="shrink">True</property>
+             <property name="resize">False</property>
+           </packing>
+         </child>
+
+         <child>
+           <widget class="GtkVPaned" id="vpaned1">
+             <property name="visible">True</property>
+             <property name="can_focus">True</property>
+             <property name="position">0</property>
+
+             <child>
+               <widget class="GtkScrolledWindow" id="scrolledwindow2">
+                 <property name="visible">True</property>
+                 <property 
name="hscrollbar_policy">GTK_POLICY_AUTOMATIC</property>
+                 <property 
name="vscrollbar_policy">GTK_POLICY_AUTOMATIC</property>
+                 <property name="shadow_type">GTK_SHADOW_IN</property>
+                 <property 
name="window_placement">GTK_CORNER_TOP_LEFT</property>
+
+                 <child>
+                   <widget class="GtkTreeView" id="treeview2">
+                     <property name="visible">True</property>
+                     <property name="can_focus">True</property>
+                     <property name="has_focus">True</property>
+                     <property name="headers_visible">True</property>
+                     <property name="rules_hint">False</property>
+                     <property name="reorderable">False</property>
+                     <property name="enable_search">False</property>
+                     <signal name="cursor_changed" 
handler="on_treeview2_cursor_changed" last_modification_time="Sun, 12 Jan 2003 
15:57:55 GMT"/>
+                     <signal name="button_press_event" 
handler="on_treeview2_button_press_event" last_modification_time="Sun, 12 Jan 
2003 15:57:58 GMT"/>
+                     <signal name="key_press_event" 
handler="on_treeview2_key_press_event" last_modification_time="Sun, 12 Jan 2003 
15:58:01 GMT"/>
+                   </widget>
+                 </child>
+               </widget>
+               <packing>
+                 <property name="shrink">True</property>
+                 <property name="resize">False</property>
+               </packing>
+             </child>
+
+             <child>
+               <widget class="GtkScrolledWindow" id="scrolledwindow3">
+                 <property name="visible">True</property>
+                 <property name="hscrollbar_policy">GTK_POLICY_NEVER</property>
+                 <property 
name="vscrollbar_policy">GTK_POLICY_AUTOMATIC</property>
+                 <property name="shadow_type">GTK_SHADOW_IN</property>
+                 <property 
name="window_placement">GTK_CORNER_TOP_LEFT</property>
+
+                 <child>
+                   <widget class="GtkTextView" id="textview3">
+                     <property name="visible">True</property>
+                     <property name="can_focus">True</property>
+                     <property name="editable">False</property>
+                     <property name="overwrite">False</property>
+                     <property name="accepts_tab">True</property>
+                     <property name="justification">GTK_JUSTIFY_LEFT</property>
+                     <property name="wrap_mode">GTK_WRAP_WORD</property>
+                     <property name="cursor_visible">True</property>
+                     <property name="pixels_above_lines">0</property>
+                     <property name="pixels_below_lines">0</property>
+                     <property name="pixels_inside_wrap">0</property>
+                     <property name="left_margin">0</property>
+                     <property name="right_margin">0</property>
+                     <property name="indent">0</property>
+                     <property name="text" translatable="yes">Sorry, no help 
available for this option yet.</property>
+                   </widget>
+                 </child>
+               </widget>
+               <packing>
+                 <property name="shrink">True</property>
+                 <property name="resize">True</property>
+               </packing>
+             </child>
+           </widget>
+           <packing>
+             <property name="shrink">True</property>
+             <property name="resize">True</property>
+           </packing>
+         </child>
+       </widget>
+       <packing>
+         <property name="padding">0</property>
+         <property name="expand">True</property>
+         <property name="fill">True</property>
+       </packing>
+      </child>
+    </widget>
+  </child>
+</widget>
+
+</glade-interface>
diff --git a/xen/tools/kconfig/images.c b/xen/tools/kconfig/images.c
new file mode 100644
index 0000000..d4f84bd
--- /dev/null
+++ b/xen/tools/kconfig/images.c
@@ -0,0 +1,326 @@
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@xxxxxxxxxxxxxx>
+ * Released under the terms of the GNU GPL v2.0.
+ */
+
+static const char *xpm_load[] = {
+"22 22 5 1",
+". c None",
+"# c #000000",
+"c c #838100",
+"a c #ffff00",
+"b c #ffffff",
+"......................",
+"......................",
+"......................",
+"............####....#.",
+"...........#....##.##.",
+"..................###.",
+".................####.",
+".####...........#####.",
+"#abab##########.......",
+"#babababababab#.......",
+"#ababababababa#.......",
+"#babababababab#.......",
+"#ababab###############",
+"#babab##cccccccccccc##",
+"#abab##cccccccccccc##.",
+"#bab##cccccccccccc##..",
+"#ab##cccccccccccc##...",
+"#b##cccccccccccc##....",
+"###cccccccccccc##.....",
+"##cccccccccccc##......",
+"###############.......",
+"......................"};
+
+static const char *xpm_save[] = {
+"22 22 5 1",
+". c None",
+"# c #000000",
+"a c #838100",
+"b c #c5c2c5",
+"c c #cdb6d5",
+"......................",
+".####################.",
+".#aa#bbbbbbbbbbbb#bb#.",
+".#aa#bbbbbbbbbbbb#bb#.",
+".#aa#bbbbbbbbbcbb####.",
+".#aa#bbbccbbbbbbb#aa#.",
+".#aa#bbbccbbbbbbb#aa#.",
+".#aa#bbbbbbbbbbbb#aa#.",
+".#aa#bbbbbbbbbbbb#aa#.",
+".#aa#bbbbbbbbbbbb#aa#.",
+".#aa#bbbbbbbbbbbb#aa#.",
+".#aaa############aaa#.",
+".#aaaaaaaaaaaaaaaaaa#.",
+".#aaaaaaaaaaaaaaaaaa#.",
+".#aaa#############aa#.",
+".#aaa#########bbb#aa#.",
+".#aaa#########bbb#aa#.",
+".#aaa#########bbb#aa#.",
+".#aaa#########bbb#aa#.",
+".#aaa#########bbb#aa#.",
+"..##################..",
+"......................"};
+
+static const char *xpm_back[] = {
+"22 22 3 1",
+". c None",
+"# c #000083",
+"a c #838183",
+"......................",
+"......................",
+"......................",
+"......................",
+"......................",
+"...........######a....",
+"..#......##########...",
+"..##...####......##a..",
+"..###.###.........##..",
+"..######..........##..",
+"..#####...........##..",
+"..######..........##..",
+"..#######.........##..",
+"..########.......##a..",
+"...............a###...",
+"...............###....",
+"......................",
+"......................",
+"......................",
+"......................",
+"......................",
+"......................"};
+
+static const char *xpm_tree_view[] = {
+"22 22 2 1",
+". c None",
+"# c #000000",
+"......................",
+"......................",
+"......#...............",
+"......#...............",
+"......#...............",
+"......#...............",
+"......#...............",
+"......########........",
+"......#...............",
+"......#...............",
+"......#...............",
+"......#...............",
+"......#...............",
+"......########........",
+"......#...............",
+"......#...............",
+"......#...............",
+"......#...............",
+"......#...............",
+"......########........",
+"......................",
+"......................"};
+
+static const char *xpm_single_view[] = {
+"22 22 2 1",
+". c None",
+"# c #000000",
+"......................",
+"......................",
+"..........#...........",
+"..........#...........",
+"..........#...........",
+"..........#...........",
+"..........#...........",
+"..........#...........",
+"..........#...........",
+"..........#...........",
+"..........#...........",
+"..........#...........",
+"..........#...........",
+"..........#...........",
+"..........#...........",
+"..........#...........",
+"..........#...........",
+"..........#...........",
+"..........#...........",
+"..........#...........",
+"......................",
+"......................"};
+
+static const char *xpm_split_view[] = {
+"22 22 2 1",
+". c None",
+"# c #000000",
+"......................",
+"......................",
+"......#......#........",
+"......#......#........",
+"......#......#........",
+"......#......#........",
+"......#......#........",
+"......#......#........",
+"......#......#........",
+"......#......#........",
+"......#......#........",
+"......#......#........",
+"......#......#........",
+"......#......#........",
+"......#......#........",
+"......#......#........",
+"......#......#........",
+"......#......#........",
+"......#......#........",
+"......#......#........",
+"......................",
+"......................"};
+
+static const char *xpm_symbol_no[] = {
+"12 12 2 1",
+"  c white",
+". c black",
+"            ",
+" .......... ",
+" .        . ",
+" .        . ",
+" .        . ",
+" .        . ",
+" .        . ",
+" .        . ",
+" .        . ",
+" .        . ",
+" .......... ",
+"            "};
+
+static const char *xpm_symbol_mod[] = {
+"12 12 2 1",
+"  c white",
+". c black",
+"            ",
+" .......... ",
+" .        . ",
+" .        . ",
+" .   ..   . ",
+" .  ....  . ",
+" .  ....  . ",
+" .   ..   . ",
+" .        . ",
+" .        . ",
+" .......... ",
+"            "};
+
+static const char *xpm_symbol_yes[] = {
+"12 12 2 1",
+"  c white",
+". c black",
+"            ",
+" .......... ",
+" .        . ",
+" .        . ",
+" .      . . ",
+" .     .. . ",
+" . .  ..  . ",
+" . ....   . ",
+" .  ..    . ",
+" .        . ",
+" .......... ",
+"            "};
+
+static const char *xpm_choice_no[] = {
+"12 12 2 1",
+"  c white",
+". c black",
+"            ",
+"    ....    ",
+"  ..    ..  ",
+"  .      .  ",
+" .        . ",
+" .        . ",
+" .        . ",
+" .        . ",
+"  .      .  ",
+"  ..    ..  ",
+"    ....    ",
+"            "};
+
+static const char *xpm_choice_yes[] = {
+"12 12 2 1",
+"  c white",
+". c black",
+"            ",
+"    ....    ",
+"  ..    ..  ",
+"  .      .  ",
+" .   ..   . ",
+" .  ....  . ",
+" .  ....  . ",
+" .   ..   . ",
+"  .      .  ",
+"  ..    ..  ",
+"    ....    ",
+"            "};
+
+static const char *xpm_menu[] = {
+"12 12 2 1",
+"  c white",
+". c black",
+"            ",
+" .......... ",
+" .        . ",
+" . ..     . ",
+" . ....   . ",
+" . ...... . ",
+" . ...... . ",
+" . ....   . ",
+" . ..     . ",
+" .        . ",
+" .......... ",
+"            "};
+
+static const char *xpm_menu_inv[] = {
+"12 12 2 1",
+"  c white",
+". c black",
+"            ",
+" .......... ",
+" .......... ",
+" ..  ...... ",
+" ..    .... ",
+" ..      .. ",
+" ..      .. ",
+" ..    .... ",
+" ..  ...... ",
+" .......... ",
+" .......... ",
+"            "};
+
+static const char *xpm_menuback[] = {
+"12 12 2 1",
+"  c white",
+". c black",
+"            ",
+" .......... ",
+" .        . ",
+" .     .. . ",
+" .   .... . ",
+" . ...... . ",
+" . ...... . ",
+" .   .... . ",
+" .     .. . ",
+" .        . ",
+" .......... ",
+"            "};
+
+static const char *xpm_void[] = {
+"12 12 2 1",
+"  c white",
+". c black",
+"            ",
+"            ",
+"            ",
+"            ",
+"            ",
+"            ",
+"            ",
+"            ",
+"            ",
+"            ",
+"            ",
+"            "};
diff --git a/xen/tools/kconfig/kxgettext.c b/xen/tools/kconfig/kxgettext.c
new file mode 100644
index 0000000..2858738
--- /dev/null
+++ b/xen/tools/kconfig/kxgettext.c
@@ -0,0 +1,235 @@
+/*
+ * Arnaldo Carvalho de Melo <acme@xxxxxxxxxxxxxxxx>, 2005
+ *
+ * Released under the terms of the GNU GPL v2.0
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "lkc.h"
+
+static char *escape(const char* text, char *bf, int len)
+{
+       char *bfp = bf;
+       int multiline = strchr(text, '\n') != NULL;
+       int eol = 0;
+       int textlen = strlen(text);
+
+       if ((textlen > 0) && (text[textlen-1] == '\n'))
+               eol = 1;
+
+       *bfp++ = '"';
+       --len;
+
+       if (multiline) {
+               *bfp++ = '"';
+               *bfp++ = '\n';
+               *bfp++ = '"';
+               len -= 3;
+       }
+
+       while (*text != '\0' && len > 1) {
+               if (*text == '"')
+                       *bfp++ = '\\';
+               else if (*text == '\n') {
+                       *bfp++ = '\\';
+                       *bfp++ = 'n';
+                       *bfp++ = '"';
+                       *bfp++ = '\n';
+                       *bfp++ = '"';
+                       len -= 5;
+                       ++text;
+                       goto next;
+               }
+               else if (*text == '\\') {
+                       *bfp++ = '\\';
+                       len--;
+               }
+               *bfp++ = *text++;
+next:
+               --len;
+       }
+
+       if (multiline && eol)
+               bfp -= 3;
+
+       *bfp++ = '"';
+       *bfp = '\0';
+
+       return bf;
+}
+
+struct file_line {
+       struct file_line *next;
+       const char *file;
+       int lineno;
+};
+
+static struct file_line *file_line__new(const char *file, int lineno)
+{
+       struct file_line *self = malloc(sizeof(*self));
+
+       if (self == NULL)
+               goto out;
+
+       self->file   = file;
+       self->lineno = lineno;
+       self->next   = NULL;
+out:
+       return self;
+}
+
+struct message {
+       const char       *msg;
+       const char       *option;
+       struct message   *next;
+       struct file_line *files;
+};
+
+static struct message *message__list;
+
+static struct message *message__new(const char *msg, char *option,
+                                   const char *file, int lineno)
+{
+       struct message *self = malloc(sizeof(*self));
+
+       if (self == NULL)
+               goto out;
+
+       self->files = file_line__new(file, lineno);
+       if (self->files == NULL)
+               goto out_fail;
+
+       self->msg = strdup(msg);
+       if (self->msg == NULL)
+               goto out_fail_msg;
+
+       self->option = option;
+       self->next = NULL;
+out:
+       return self;
+out_fail_msg:
+       free(self->files);
+out_fail:
+       free(self);
+       self = NULL;
+       goto out;
+}
+
+static struct message *mesage__find(const char *msg)
+{
+       struct message *m = message__list;
+
+       while (m != NULL) {
+               if (strcmp(m->msg, msg) == 0)
+                       break;
+               m = m->next;
+       }
+
+       return m;
+}
+
+static int message__add_file_line(struct message *self, const char *file,
+                                 int lineno)
+{
+       int rc = -1;
+       struct file_line *fl = file_line__new(file, lineno);
+
+       if (fl == NULL)
+               goto out;
+
+       fl->next    = self->files;
+       self->files = fl;
+       rc = 0;
+out:
+       return rc;
+}
+
+static int message__add(const char *msg, char *option, const char *file,
+                       int lineno)
+{
+       int rc = 0;
+       char bf[16384];
+       char *escaped = escape(msg, bf, sizeof(bf));
+       struct message *m = mesage__find(escaped);
+
+       if (m != NULL)
+               rc = message__add_file_line(m, file, lineno);
+       else {
+               m = message__new(escaped, option, file, lineno);
+
+               if (m != NULL) {
+                       m->next       = message__list;
+                       message__list = m;
+               } else
+                       rc = -1;
+       }
+       return rc;
+}
+
+static void menu_build_message_list(struct menu *menu)
+{
+       struct menu *child;
+
+       message__add(menu_get_prompt(menu), NULL,
+                    menu->file == NULL ? "Root Menu" : menu->file->name,
+                    menu->lineno);
+
+       if (menu->sym != NULL && menu_has_help(menu))
+               message__add(menu_get_help(menu), menu->sym->name,
+                            menu->file == NULL ? "Root Menu" : 
menu->file->name,
+                            menu->lineno);
+
+       for (child = menu->list; child != NULL; child = child->next)
+               if (child->prompt != NULL)
+                       menu_build_message_list(child);
+}
+
+static void message__print_file_lineno(struct message *self)
+{
+       struct file_line *fl = self->files;
+
+       putchar('\n');
+       if (self->option != NULL)
+               printf("# %s:00000\n", self->option);
+
+       printf("#: %s:%d", fl->file, fl->lineno);
+       fl = fl->next;
+
+       while (fl != NULL) {
+               printf(", %s:%d", fl->file, fl->lineno);
+               fl = fl->next;
+       }
+
+       putchar('\n');
+}
+
+static void message__print_gettext_msgid_msgstr(struct message *self)
+{
+       message__print_file_lineno(self);
+
+       printf("msgid %s\n"
+              "msgstr \"\"\n", self->msg);
+}
+
+static void menu__xgettext(void)
+{
+       struct message *m = message__list;
+
+       while (m != NULL) {
+               /* skip empty lines ("") */
+               if (strlen(m->msg) > sizeof("\"\""))
+                       message__print_gettext_msgid_msgstr(m);
+               m = m->next;
+       }
+}
+
+int main(int ac, char **av)
+{
+       conf_parse(av[1]);
+
+       menu_build_message_list(menu_get_root_menu(NULL));
+       menu__xgettext();
+       return 0;
+}
diff --git a/xen/tools/kconfig/list.h b/xen/tools/kconfig/list.h
new file mode 100644
index 0000000..2cf23f0
--- /dev/null
+++ b/xen/tools/kconfig/list.h
@@ -0,0 +1,131 @@
+#ifndef LIST_H
+#define LIST_H
+
+/*
+ * Copied from include/linux/...
+ */
+
+#undef offsetof
+#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+
+/**
+ * container_of - cast a member of a structure out to the containing structure
+ * @ptr:        the pointer to the member.
+ * @type:       the type of the container struct this is embedded in.
+ * @member:     the name of the member within the struct.
+ *
+ */
+#define container_of(ptr, type, member) ({                      \
+       const typeof( ((type *)0)->member ) *__mptr = (ptr);    \
+       (type *)( (char *)__mptr - offsetof(type,member) );})
+
+
+struct list_head {
+       struct list_head *next, *prev;
+};
+
+
+#define LIST_HEAD_INIT(name) { &(name), &(name) }
+
+#define LIST_HEAD(name) \
+       struct list_head name = LIST_HEAD_INIT(name)
+
+/**
+ * list_entry - get the struct for this entry
+ * @ptr:       the &struct list_head pointer.
+ * @type:      the type of the struct this is embedded in.
+ * @member:    the name of the list_head within the struct.
+ */
+#define list_entry(ptr, type, member) \
+       container_of(ptr, type, member)
+
+/**
+ * list_for_each_entry -       iterate over list of given type
+ * @pos:       the type * to use as a loop cursor.
+ * @head:      the head for your list.
+ * @member:    the name of the list_head within the struct.
+ */
+#define list_for_each_entry(pos, head, member)                         \
+       for (pos = list_entry((head)->next, typeof(*pos), member);      \
+            &pos->member != (head);    \
+            pos = list_entry(pos->member.next, typeof(*pos), member))
+
+/**
+ * list_for_each_entry_safe - iterate over list of given type safe against 
removal of list entry
+ * @pos:       the type * to use as a loop cursor.
+ * @n:         another type * to use as temporary storage
+ * @head:      the head for your list.
+ * @member:    the name of the list_head within the struct.
+ */
+#define list_for_each_entry_safe(pos, n, head, member)                 \
+       for (pos = list_entry((head)->next, typeof(*pos), member),      \
+               n = list_entry(pos->member.next, typeof(*pos), member); \
+            &pos->member != (head);                                    \
+            pos = n, n = list_entry(n->member.next, typeof(*n), member))
+
+/**
+ * list_empty - tests whether a list is empty
+ * @head: the list to test.
+ */
+static inline int list_empty(const struct list_head *head)
+{
+       return head->next == head;
+}
+
+/*
+ * Insert a new entry between two known consecutive entries.
+ *
+ * This is only for internal list manipulation where we know
+ * the prev/next entries already!
+ */
+static inline void __list_add(struct list_head *_new,
+                             struct list_head *prev,
+                             struct list_head *next)
+{
+       next->prev = _new;
+       _new->next = next;
+       _new->prev = prev;
+       prev->next = _new;
+}
+
+/**
+ * list_add_tail - add a new entry
+ * @new: new entry to be added
+ * @head: list head to add it before
+ *
+ * Insert a new entry before the specified head.
+ * This is useful for implementing queues.
+ */
+static inline void list_add_tail(struct list_head *_new, struct list_head 
*head)
+{
+       __list_add(_new, head->prev, head);
+}
+
+/*
+ * Delete a list entry by making the prev/next entries
+ * point to each other.
+ *
+ * This is only for internal list manipulation where we know
+ * the prev/next entries already!
+ */
+static inline void __list_del(struct list_head *prev, struct list_head *next)
+{
+       next->prev = prev;
+       prev->next = next;
+}
+
+#define LIST_POISON1  ((void *) 0x00100100)
+#define LIST_POISON2  ((void *) 0x00200200)
+/**
+ * list_del - deletes entry from list.
+ * @entry: the element to delete from the list.
+ * Note: list_empty() on entry does not return true after this, the entry is
+ * in an undefined state.
+ */
+static inline void list_del(struct list_head *entry)
+{
+       __list_del(entry->prev, entry->next);
+       entry->next = (struct list_head*)LIST_POISON1;
+       entry->prev = (struct list_head*)LIST_POISON2;
+}
+#endif
diff --git a/xen/tools/kconfig/lkc.h b/xen/tools/kconfig/lkc.h
new file mode 100644
index 0000000..91ca126
--- /dev/null
+++ b/xen/tools/kconfig/lkc.h
@@ -0,0 +1,186 @@
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@xxxxxxxxxxxxxx>
+ * Released under the terms of the GNU GPL v2.0.
+ */
+
+#ifndef LKC_H
+#define LKC_H
+
+#include "expr.h"
+
+#ifndef KBUILD_NO_NLS
+# include <libintl.h>
+#else
+static inline const char *gettext(const char *txt) { return txt; }
+static inline void textdomain(const char *domainname) {}
+static inline void bindtextdomain(const char *name, const char *dir) {}
+static inline char *bind_textdomain_codeset(const char *dn, char *c) { return 
c; }
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "lkc_proto.h"
+
+#define SRCTREE "srctree"
+
+#ifndef PACKAGE
+#define PACKAGE "linux"
+#endif
+
+#define LOCALEDIR "/usr/share/locale"
+
+#define _(text) gettext(text)
+#define N_(text) (text)
+
+#ifndef CONFIG_
+#define CONFIG_ "CONFIG_"
+#endif
+static inline const char *CONFIG_prefix(void)
+{
+       return getenv( "CONFIG_" ) ?: CONFIG_;
+}
+#undef CONFIG_
+#define CONFIG_ CONFIG_prefix()
+
+#define TF_COMMAND     0x0001
+#define TF_PARAM       0x0002
+#define TF_OPTION      0x0004
+
+enum conf_def_mode {
+       def_default,
+       def_yes,
+       def_mod,
+       def_no,
+       def_random
+};
+
+#define T_OPT_MODULES          1
+#define T_OPT_DEFCONFIG_LIST   2
+#define T_OPT_ENV              3
+#define T_OPT_ALLNOCONFIG_Y    4
+
+struct kconf_id {
+       int name;
+       int token;
+       unsigned int flags;
+       enum symbol_type stype;
+};
+
+void zconfdump(FILE *out);
+void zconf_starthelp(void);
+FILE *zconf_fopen(const char *name);
+void zconf_initscan(const char *name);
+void zconf_nextfile(const char *name);
+int zconf_lineno(void);
+const char *zconf_curname(void);
+
+/* confdata.c */
+const char *conf_get_configname(void);
+const char *conf_get_autoconfig_name(void);
+char *conf_get_default_confname(void);
+void sym_set_change_count(int count);
+void sym_add_change_count(int count);
+bool conf_set_all_new_symbols(enum conf_def_mode mode);
+void set_all_choice_values(struct symbol *csym);
+
+/* confdata.c and expr.c */
+static inline void xfwrite(const void *str, size_t len, size_t count, FILE 
*out)
+{
+       assert(len != 0);
+
+       if (fwrite(str, len, count, out) != count)
+               fprintf(stderr, "Error in writing or end of file.\n");
+}
+
+/* menu.c */
+void _menu_init(void);
+void menu_warn(struct menu *menu, const char *fmt, ...);
+struct menu *menu_add_menu(void);
+void menu_end_menu(void);
+void menu_add_entry(struct symbol *sym);
+void menu_end_entry(void);
+void menu_add_dep(struct expr *dep);
+void menu_add_visibility(struct expr *dep);
+struct property *menu_add_prompt(enum prop_type type, char *prompt, struct 
expr *dep);
+void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep);
+void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr 
*dep);
+void menu_add_option(int token, char *arg);
+void menu_finalize(struct menu *parent);
+void menu_set_type(int type);
+
+/* util.c */
+struct file *file_lookup(const char *name);
+int file_write_dep(const char *name);
+void *xmalloc(size_t size);
+void *xcalloc(size_t nmemb, size_t size);
+
+struct gstr {
+       size_t len;
+       char  *s;
+       /*
+       * when max_width is not zero long lines in string s (if any) get
+       * wrapped not to exceed the max_width value
+       */
+       int max_width;
+};
+struct gstr str_new(void);
+void str_free(struct gstr *gs);
+void str_append(struct gstr *gs, const char *s);
+void str_printf(struct gstr *gs, const char *fmt, ...);
+const char *str_get(struct gstr *gs);
+
+/* symbol.c */
+extern struct expr *sym_env_list;
+
+void sym_init(void);
+void sym_clear_all_valid(void);
+struct symbol *sym_choice_default(struct symbol *sym);
+const char *sym_get_string_default(struct symbol *sym);
+struct symbol *sym_check_deps(struct symbol *sym);
+struct property *prop_alloc(enum prop_type type, struct symbol *sym);
+struct symbol *prop_get_symbol(struct property *prop);
+struct property *sym_get_env_prop(struct symbol *sym);
+
+static inline tristate sym_get_tristate_value(struct symbol *sym)
+{
+       return sym->curr.tri;
+}
+
+
+static inline struct symbol *sym_get_choice_value(struct symbol *sym)
+{
+       return (struct symbol *)sym->curr.val;
+}
+
+static inline bool sym_set_choice_value(struct symbol *ch, struct symbol 
*chval)
+{
+       return sym_set_tristate_value(chval, yes);
+}
+
+static inline bool sym_is_choice(struct symbol *sym)
+{
+       return sym->flags & SYMBOL_CHOICE ? true : false;
+}
+
+static inline bool sym_is_choice_value(struct symbol *sym)
+{
+       return sym->flags & SYMBOL_CHOICEVAL ? true : false;
+}
+
+static inline bool sym_is_optional(struct symbol *sym)
+{
+       return sym->flags & SYMBOL_OPTIONAL ? true : false;
+}
+
+static inline bool sym_has_value(struct symbol *sym)
+{
+       return sym->flags & SYMBOL_DEF_USER ? true : false;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LKC_H */
diff --git a/xen/tools/kconfig/lkc_proto.h b/xen/tools/kconfig/lkc_proto.h
new file mode 100644
index 0000000..d539871
--- /dev/null
+++ b/xen/tools/kconfig/lkc_proto.h
@@ -0,0 +1,52 @@
+#include <stdarg.h>
+
+/* confdata.c */
+void conf_parse(const char *name);
+int conf_read(const char *name);
+int conf_read_simple(const char *name, int);
+int conf_write_defconfig(const char *name);
+int conf_write(const char *name);
+int conf_write_autoconf(void);
+bool conf_get_changed(void);
+void conf_set_changed_callback(void (*fn)(void));
+void conf_set_message_callback(void (*fn)(const char *fmt, va_list ap));
+
+/* menu.c */
+extern struct menu rootmenu;
+
+bool menu_is_empty(struct menu *menu);
+bool menu_is_visible(struct menu *menu);
+bool menu_has_prompt(struct menu *menu);
+const char * menu_get_prompt(struct menu *menu);
+struct menu * menu_get_root_menu(struct menu *menu);
+struct menu * menu_get_parent_menu(struct menu *menu);
+bool menu_has_help(struct menu *menu);
+const char * menu_get_help(struct menu *menu);
+struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head);
+void menu_get_ext_help(struct menu *menu, struct gstr *help);
+
+/* symbol.c */
+extern struct symbol * symbol_hash[SYMBOL_HASHSIZE];
+
+struct symbol * sym_lookup(const char *name, int flags);
+struct symbol * sym_find(const char *name);
+const char * sym_expand_string_value(const char *in);
+const char * sym_escape_string_value(const char *in);
+struct symbol ** sym_re_search(const char *pattern);
+const char * sym_type_name(enum symbol_type type);
+void sym_calc_value(struct symbol *sym);
+enum symbol_type sym_get_type(struct symbol *sym);
+bool sym_tristate_within_range(struct symbol *sym,tristate tri);
+bool sym_set_tristate_value(struct symbol *sym,tristate tri);
+tristate sym_toggle_tristate_value(struct symbol *sym);
+bool sym_string_valid(struct symbol *sym, const char *newval);
+bool sym_string_within_range(struct symbol *sym, const char *str);
+bool sym_set_string_value(struct symbol *sym, const char *newval);
+bool sym_is_changable(struct symbol *sym);
+struct property * sym_get_choice_prop(struct symbol *sym);
+const char * sym_get_string_value(struct symbol *sym);
+
+const char * prop_get_type_name(enum prop_type type);
+
+/* expr.c */
+void expr_print(struct expr *e, void (*fn)(void *, struct symbol *, const char 
*), void *data, int prevtoken);
diff --git a/xen/tools/kconfig/lxdialog/.gitignore 
b/xen/tools/kconfig/lxdialog/.gitignore
new file mode 100644
index 0000000..90b08ff
--- /dev/null
+++ b/xen/tools/kconfig/lxdialog/.gitignore
@@ -0,0 +1,4 @@
+#
+# Generated files
+#
+lxdialog
diff --git a/xen/tools/kconfig/lxdialog/BIG.FAT.WARNING 
b/xen/tools/kconfig/lxdialog/BIG.FAT.WARNING
new file mode 100644
index 0000000..a8999d8
--- /dev/null
+++ b/xen/tools/kconfig/lxdialog/BIG.FAT.WARNING
@@ -0,0 +1,4 @@
+This is NOT the official version of dialog.  This version has been
+significantly modified from the original.  It is for use by the Linux
+kernel configuration script.  Please do not bother Savio Lam with 
+questions about this program.
diff --git a/xen/tools/kconfig/lxdialog/check-lxdialog.sh 
b/xen/tools/kconfig/lxdialog/check-lxdialog.sh
new file mode 100755
index 0000000..5075ebf
--- /dev/null
+++ b/xen/tools/kconfig/lxdialog/check-lxdialog.sh
@@ -0,0 +1,91 @@
+#!/bin/sh
+# Check ncurses compatibility
+
+# What library to link
+ldflags()
+{
+       pkg-config --libs ncursesw 2>/dev/null && exit
+       pkg-config --libs ncurses 2>/dev/null && exit
+       for ext in so a dll.a dylib ; do
+               for lib in ncursesw ncurses curses ; do
+                       $cc -print-file-name=lib${lib}.${ext} | grep -q /
+                       if [ $? -eq 0 ]; then
+                               echo "-l${lib}"
+                               exit
+                       fi
+               done
+       done
+       exit 1
+}
+
+# Where is ncurses.h?
+ccflags()
+{
+       if pkg-config --cflags ncursesw 2>/dev/null; then
+               echo '-DCURSES_LOC="<ncurses.h>" -DNCURSES_WIDECHAR=1'
+       elif pkg-config --cflags ncurses 2>/dev/null; then
+               echo '-DCURSES_LOC="<ncurses.h>"'
+       elif [ -f /usr/include/ncursesw/curses.h ]; then
+               echo '-I/usr/include/ncursesw -DCURSES_LOC="<curses.h>"'
+               echo ' -DNCURSES_WIDECHAR=1'
+       elif [ -f /usr/include/ncurses/ncurses.h ]; then
+               echo '-I/usr/include/ncurses -DCURSES_LOC="<ncurses.h>"'
+       elif [ -f /usr/include/ncurses/curses.h ]; then
+               echo '-I/usr/include/ncurses -DCURSES_LOC="<curses.h>"'
+       elif [ -f /usr/include/ncurses.h ]; then
+               echo '-DCURSES_LOC="<ncurses.h>"'
+       else
+               echo '-DCURSES_LOC="<curses.h>"'
+       fi
+}
+
+# Temp file, try to clean up after us
+tmp=.lxdialog.tmp
+trap "rm -f $tmp" 0 1 2 3 15
+
+# Check if we can link to ncurses
+check() {
+        $cc -x c - -o $tmp 2>/dev/null <<'EOF'
+#include CURSES_LOC
+main() {}
+EOF
+       if [ $? != 0 ]; then
+           echo " *** Unable to find the ncurses libraries or the"       1>&2
+           echo " *** required header files."                            1>&2
+           echo " *** 'make menuconfig' requires the ncurses libraries." 1>&2
+           echo " *** "                                                  1>&2
+           echo " *** Install ncurses (ncurses-devel) and try again."    1>&2
+           echo " *** "                                                  1>&2
+           exit 1
+       fi
+}
+
+usage() {
+       printf "Usage: $0 [-check compiler options|-ccflags|-ldflags compiler 
options]\n"
+}
+
+if [ $# -eq 0 ]; then
+       usage
+       exit 1
+fi
+
+cc=""
+case "$1" in
+       "-check")
+               shift
+               cc="$@"
+               check
+               ;;
+       "-ccflags")
+               ccflags
+               ;;
+       "-ldflags")
+               shift
+               cc="$@"
+               ldflags
+               ;;
+       "*")
+               usage
+               exit 1
+               ;;
+esac
diff --git a/xen/tools/kconfig/lxdialog/checklist.c 
b/xen/tools/kconfig/lxdialog/checklist.c
new file mode 100644
index 0000000..8d016fa
--- /dev/null
+++ b/xen/tools/kconfig/lxdialog/checklist.c
@@ -0,0 +1,332 @@
+/*
+ *  checklist.c -- implements the checklist box
+ *
+ *  ORIGINAL AUTHOR: Savio Lam (lam836@xxxxxxxxxx)
+ *     Stuart Herbert - S.Herbert@xxxxxxxxxxxxxxx: radiolist extension
+ *     Alessandro Rubini - rubini@xxxxxxxxxxxxxxx: merged the two
+ *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@xxxxxxx)
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "dialog.h"
+
+static int list_width, check_x, item_x;
+
+/*
+ * Print list item
+ */
+static void print_item(WINDOW * win, int choice, int selected)
+{
+       int i;
+       char *list_item = malloc(list_width + 1);
+
+       strncpy(list_item, item_str(), list_width - item_x);
+       list_item[list_width - item_x] = '\0';
+
+       /* Clear 'residue' of last item */
+       wattrset(win, dlg.menubox.atr);
+       wmove(win, choice, 0);
+       for (i = 0; i < list_width; i++)
+               waddch(win, ' ');
+
+       wmove(win, choice, check_x);
+       wattrset(win, selected ? dlg.check_selected.atr
+                : dlg.check.atr);
+       if (!item_is_tag(':'))
+               wprintw(win, "(%c)", item_is_tag('X') ? 'X' : ' ');
+
+       wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr);
+       mvwaddch(win, choice, item_x, list_item[0]);
+       wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
+       waddstr(win, list_item + 1);
+       if (selected) {
+               wmove(win, choice, check_x + 1);
+               wrefresh(win);
+       }
+       free(list_item);
+}
+
+/*
+ * Print the scroll indicators.
+ */
+static void print_arrows(WINDOW * win, int choice, int item_no, int scroll,
+            int y, int x, int height)
+{
+       wmove(win, y, x);
+
+       if (scroll > 0) {
+               wattrset(win, dlg.uarrow.atr);
+               waddch(win, ACS_UARROW);
+               waddstr(win, "(-)");
+       } else {
+               wattrset(win, dlg.menubox.atr);
+               waddch(win, ACS_HLINE);
+               waddch(win, ACS_HLINE);
+               waddch(win, ACS_HLINE);
+               waddch(win, ACS_HLINE);
+       }
+
+       y = y + height + 1;
+       wmove(win, y, x);
+
+       if ((height < item_no) && (scroll + choice < item_no - 1)) {
+               wattrset(win, dlg.darrow.atr);
+               waddch(win, ACS_DARROW);
+               waddstr(win, "(+)");
+       } else {
+               wattrset(win, dlg.menubox_border.atr);
+               waddch(win, ACS_HLINE);
+               waddch(win, ACS_HLINE);
+               waddch(win, ACS_HLINE);
+               waddch(win, ACS_HLINE);
+       }
+}
+
+/*
+ *  Display the termination buttons
+ */
+static void print_buttons(WINDOW * dialog, int height, int width, int selected)
+{
+       int x = width / 2 - 11;
+       int y = height - 2;
+
+       print_button(dialog, gettext("Select"), y, x, selected == 0);
+       print_button(dialog, gettext(" Help "), y, x + 14, selected == 1);
+
+       wmove(dialog, y, x + 1 + 14 * selected);
+       wrefresh(dialog);
+}
+
+/*
+ * Display a dialog box with a list of options that can be turned on or off
+ * in the style of radiolist (only one option turned on at a time).
+ */
+int dialog_checklist(const char *title, const char *prompt, int height,
+                    int width, int list_height)
+{
+       int i, x, y, box_x, box_y;
+       int key = 0, button = 0, choice = 0, scroll = 0, max_choice;
+       WINDOW *dialog, *list;
+
+       /* which item to highlight */
+       item_foreach() {
+               if (item_is_tag('X'))
+                       choice = item_n();
+               if (item_is_selected()) {
+                       choice = item_n();
+                       break;
+               }
+       }
+
+do_resize:
+       if (getmaxy(stdscr) < (height + CHECKLIST_HEIGTH_MIN))
+               return -ERRDISPLAYTOOSMALL;
+       if (getmaxx(stdscr) < (width + CHECKLIST_WIDTH_MIN))
+               return -ERRDISPLAYTOOSMALL;
+
+       max_choice = MIN(list_height, item_count());
+
+       /* center dialog box on screen */
+       x = (getmaxx(stdscr) - width) / 2;
+       y = (getmaxy(stdscr) - height) / 2;
+
+       draw_shadow(stdscr, y, x, height, width);
+
+       dialog = newwin(height, width, y, x);
+       keypad(dialog, TRUE);
+
+       draw_box(dialog, 0, 0, height, width,
+                dlg.dialog.atr, dlg.border.atr);
+       wattrset(dialog, dlg.border.atr);
+       mvwaddch(dialog, height - 3, 0, ACS_LTEE);
+       for (i = 0; i < width - 2; i++)
+               waddch(dialog, ACS_HLINE);
+       wattrset(dialog, dlg.dialog.atr);
+       waddch(dialog, ACS_RTEE);
+
+       print_title(dialog, title, width);
+
+       wattrset(dialog, dlg.dialog.atr);
+       print_autowrap(dialog, prompt, width - 2, 1, 3);
+
+       list_width = width - 6;
+       box_y = height - list_height - 5;
+       box_x = (width - list_width) / 2 - 1;
+
+       /* create new window for the list */
+       list = subwin(dialog, list_height, list_width, y + box_y + 1,
+                     x + box_x + 1);
+
+       keypad(list, TRUE);
+
+       /* draw a box around the list items */
+       draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
+                dlg.menubox_border.atr, dlg.menubox.atr);
+
+       /* Find length of longest item in order to center checklist */
+       check_x = 0;
+       item_foreach()
+               check_x = MAX(check_x, strlen(item_str()) + 4);
+       check_x = MIN(check_x, list_width);
+
+       check_x = (list_width - check_x) / 2;
+       item_x = check_x + 4;
+
+       if (choice >= list_height) {
+               scroll = choice - list_height + 1;
+               choice -= scroll;
+       }
+
+       /* Print the list */
+       for (i = 0; i < max_choice; i++) {
+               item_set(scroll + i);
+               print_item(list, i, i == choice);
+       }
+
+       print_arrows(dialog, choice, item_count(), scroll,
+                    box_y, box_x + check_x + 5, list_height);
+
+       print_buttons(dialog, height, width, 0);
+
+       wnoutrefresh(dialog);
+       wnoutrefresh(list);
+       doupdate();
+
+       while (key != KEY_ESC) {
+               key = wgetch(dialog);
+
+               for (i = 0; i < max_choice; i++) {
+                       item_set(i + scroll);
+                       if (toupper(key) == toupper(item_str()[0]))
+                               break;
+               }
+
+               if (i < max_choice || key == KEY_UP || key == KEY_DOWN ||
+                   key == '+' || key == '-') {
+                       if (key == KEY_UP || key == '-') {
+                               if (!choice) {
+                                       if (!scroll)
+                                               continue;
+                                       /* Scroll list down */
+                                       if (list_height > 1) {
+                                               /* De-highlight current first 
item */
+                                               item_set(scroll);
+                                               print_item(list, 0, FALSE);
+                                               scrollok(list, TRUE);
+                                               wscrl(list, -1);
+                                               scrollok(list, FALSE);
+                                       }
+                                       scroll--;
+                                       item_set(scroll);
+                                       print_item(list, 0, TRUE);
+                                       print_arrows(dialog, choice, 
item_count(),
+                                                    scroll, box_y, box_x + 
check_x + 5, list_height);
+
+                                       wnoutrefresh(dialog);
+                                       wrefresh(list);
+
+                                       continue;       /* wait for another key 
press */
+                               } else
+                                       i = choice - 1;
+                       } else if (key == KEY_DOWN || key == '+') {
+                               if (choice == max_choice - 1) {
+                                       if (scroll + choice >= item_count() - 1)
+                                               continue;
+                                       /* Scroll list up */
+                                       if (list_height > 1) {
+                                               /* De-highlight current last 
item before scrolling up */
+                                               item_set(scroll + max_choice - 
1);
+                                               print_item(list,
+                                                           max_choice - 1,
+                                                           FALSE);
+                                               scrollok(list, TRUE);
+                                               wscrl(list, 1);
+                                               scrollok(list, FALSE);
+                                       }
+                                       scroll++;
+                                       item_set(scroll + max_choice - 1);
+                                       print_item(list, max_choice - 1, TRUE);
+
+                                       print_arrows(dialog, choice, 
item_count(),
+                                                    scroll, box_y, box_x + 
check_x + 5, list_height);
+
+                                       wnoutrefresh(dialog);
+                                       wrefresh(list);
+
+                                       continue;       /* wait for another key 
press */
+                               } else
+                                       i = choice + 1;
+                       }
+                       if (i != choice) {
+                               /* De-highlight current item */
+                               item_set(scroll + choice);
+                               print_item(list, choice, FALSE);
+                               /* Highlight new item */
+                               choice = i;
+                               item_set(scroll + choice);
+                               print_item(list, choice, TRUE);
+                               wnoutrefresh(dialog);
+                               wrefresh(list);
+                       }
+                       continue;       /* wait for another key press */
+               }
+               switch (key) {
+               case 'H':
+               case 'h':
+               case '?':
+                       button = 1;
+                       /* fall-through */
+               case 'S':
+               case 's':
+               case ' ':
+               case '\n':
+                       item_foreach()
+                               item_set_selected(0);
+                       item_set(scroll + choice);
+                       item_set_selected(1);
+                       delwin(list);
+                       delwin(dialog);
+                       return button;
+               case TAB:
+               case KEY_LEFT:
+               case KEY_RIGHT:
+                       button = ((key == KEY_LEFT ? --button : ++button) < 0)
+                           ? 1 : (button > 1 ? 0 : button);
+
+                       print_buttons(dialog, height, width, button);
+                       wrefresh(dialog);
+                       break;
+               case 'X':
+               case 'x':
+                       key = KEY_ESC;
+                       break;
+               case KEY_ESC:
+                       key = on_key_esc(dialog);
+                       break;
+               case KEY_RESIZE:
+                       delwin(list);
+                       delwin(dialog);
+                       on_key_resize();
+                       goto do_resize;
+               }
+
+               /* Now, update everything... */
+               doupdate();
+       }
+       delwin(list);
+       delwin(dialog);
+       return key;             /* ESC pressed */
+}
diff --git a/xen/tools/kconfig/lxdialog/dialog.h 
b/xen/tools/kconfig/lxdialog/dialog.h
new file mode 100644
index 0000000..fcffd5b
--- /dev/null
+++ b/xen/tools/kconfig/lxdialog/dialog.h
@@ -0,0 +1,257 @@
+/*
+ *  dialog.h -- common declarations for all dialog modules
+ *
+ *  AUTHOR: Savio Lam (lam836@xxxxxxxxxx)
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <sys/types.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+
+#ifndef KBUILD_NO_NLS
+# include <libintl.h>
+#else
+# define gettext(Msgid) ((const char *) (Msgid))
+#endif
+
+#ifdef __sun__
+#define CURS_MACROS
+#endif
+#include CURSES_LOC
+
+/*
+ * Colors in ncurses 1.9.9e do not work properly since foreground and
+ * background colors are OR'd rather than separately masked.  This version
+ * of dialog was hacked to work with ncurses 1.9.9e, making it incompatible
+ * with standard curses.  The simplest fix (to make this work with standard
+ * curses) uses the wbkgdset() function, not used in the original hack.
+ * Turn it off if we're building with 1.9.9e, since it just confuses things.
+ */
+#if defined(NCURSES_VERSION) && defined(_NEED_WRAP) && !defined(GCC_PRINTFLIKE)
+#define OLD_NCURSES 1
+#undef  wbkgdset
+#define wbkgdset(w,p)          /*nothing */
+#else
+#define OLD_NCURSES 0
+#endif
+
+#define TR(params) _tracef params
+
+#define KEY_ESC 27
+#define TAB 9
+#define MAX_LEN 2048
+#define BUF_SIZE (10*1024)
+#define MIN(x,y) (x < y ? x : y)
+#define MAX(x,y) (x > y ? x : y)
+
+#ifndef ACS_ULCORNER
+#define ACS_ULCORNER '+'
+#endif
+#ifndef ACS_LLCORNER
+#define ACS_LLCORNER '+'
+#endif
+#ifndef ACS_URCORNER
+#define ACS_URCORNER '+'
+#endif
+#ifndef ACS_LRCORNER
+#define ACS_LRCORNER '+'
+#endif
+#ifndef ACS_HLINE
+#define ACS_HLINE '-'
+#endif
+#ifndef ACS_VLINE
+#define ACS_VLINE '|'
+#endif
+#ifndef ACS_LTEE
+#define ACS_LTEE '+'
+#endif
+#ifndef ACS_RTEE
+#define ACS_RTEE '+'
+#endif
+#ifndef ACS_UARROW
+#define ACS_UARROW '^'
+#endif
+#ifndef ACS_DARROW
+#define ACS_DARROW 'v'
+#endif
+
+/* error return codes */
+#define ERRDISPLAYTOOSMALL (KEY_MAX + 1)
+
+/*
+ *   Color definitions
+ */
+struct dialog_color {
+       chtype atr;     /* Color attribute */
+       int fg;         /* foreground */
+       int bg;         /* background */
+       int hl;         /* highlight this item */
+};
+
+struct subtitle_list {
+       struct subtitle_list *next;
+       const char *text;
+};
+
+struct dialog_info {
+       const char *backtitle;
+       struct subtitle_list *subtitles;
+       struct dialog_color screen;
+       struct dialog_color shadow;
+       struct dialog_color dialog;
+       struct dialog_color title;
+       struct dialog_color border;
+       struct dialog_color button_active;
+       struct dialog_color button_inactive;
+       struct dialog_color button_key_active;
+       struct dialog_color button_key_inactive;
+       struct dialog_color button_label_active;
+       struct dialog_color button_label_inactive;
+       struct dialog_color inputbox;
+       struct dialog_color inputbox_border;
+       struct dialog_color searchbox;
+       struct dialog_color searchbox_title;
+       struct dialog_color searchbox_border;
+       struct dialog_color position_indicator;
+       struct dialog_color menubox;
+       struct dialog_color menubox_border;
+       struct dialog_color item;
+       struct dialog_color item_selected;
+       struct dialog_color tag;
+       struct dialog_color tag_selected;
+       struct dialog_color tag_key;
+       struct dialog_color tag_key_selected;
+       struct dialog_color check;
+       struct dialog_color check_selected;
+       struct dialog_color uarrow;
+       struct dialog_color darrow;
+};
+
+/*
+ * Global variables
+ */
+extern struct dialog_info dlg;
+extern char dialog_input_result[];
+extern int saved_x, saved_y;           /* Needed in signal handler in mconf.c 
*/
+
+/*
+ * Function prototypes
+ */
+
+/* item list as used by checklist and menubox */
+void item_reset(void);
+void item_make(const char *fmt, ...);
+void item_add_str(const char *fmt, ...);
+void item_set_tag(char tag);
+void item_set_data(void *p);
+void item_set_selected(int val);
+int item_activate_selected(void);
+void *item_data(void);
+char item_tag(void);
+
+/* item list manipulation for lxdialog use */
+#define MAXITEMSTR 200
+struct dialog_item {
+       char str[MAXITEMSTR];   /* prompt displayed */
+       char tag;
+       void *data;     /* pointer to menu item - used by menubox+checklist */
+       int selected;   /* Set to 1 by dialog_*() function if selected. */
+};
+
+/* list of lialog_items */
+struct dialog_list {
+       struct dialog_item node;
+       struct dialog_list *next;
+};
+
+extern struct dialog_list *item_cur;
+extern struct dialog_list item_nil;
+extern struct dialog_list *item_head;
+
+int item_count(void);
+void item_set(int n);
+int item_n(void);
+const char *item_str(void);
+int item_is_selected(void);
+int item_is_tag(char tag);
+#define item_foreach() \
+       for (item_cur = item_head ? item_head: item_cur; \
+            item_cur && (item_cur != &item_nil); item_cur = item_cur->next)
+
+/* generic key handlers */
+int on_key_esc(WINDOW *win);
+int on_key_resize(void);
+
+/* minimum (re)size values */
+#define CHECKLIST_HEIGTH_MIN 6 /* For dialog_checklist() */
+#define CHECKLIST_WIDTH_MIN 6
+#define INPUTBOX_HEIGTH_MIN 2  /* For dialog_inputbox() */
+#define INPUTBOX_WIDTH_MIN 2
+#define MENUBOX_HEIGTH_MIN 15  /* For dialog_menu() */
+#define MENUBOX_WIDTH_MIN 65
+#define TEXTBOX_HEIGTH_MIN 8   /* For dialog_textbox() */
+#define TEXTBOX_WIDTH_MIN 8
+#define YESNO_HEIGTH_MIN 4     /* For dialog_yesno() */
+#define YESNO_WIDTH_MIN 4
+#define WINDOW_HEIGTH_MIN 19   /* For init_dialog() */
+#define WINDOW_WIDTH_MIN 80
+
+int init_dialog(const char *backtitle);
+void set_dialog_backtitle(const char *backtitle);
+void set_dialog_subtitles(struct subtitle_list *subtitles);
+void end_dialog(int x, int y);
+void attr_clear(WINDOW * win, int height, int width, chtype attr);
+void dialog_clear(void);
+void print_autowrap(WINDOW * win, const char *prompt, int width, int y, int x);
+void print_button(WINDOW * win, const char *label, int y, int x, int selected);
+void print_title(WINDOW *dialog, const char *title, int width);
+void draw_box(WINDOW * win, int y, int x, int height, int width, chtype box,
+             chtype border);
+void draw_shadow(WINDOW * win, int y, int x, int height, int width);
+
+int first_alpha(const char *string, const char *exempt);
+int dialog_yesno(const char *title, const char *prompt, int height, int width);
+int dialog_msgbox(const char *title, const char *prompt, int height,
+                 int width, int pause);
+
+
+typedef void (*update_text_fn)(char *buf, size_t start, size_t end, void
+                              *_data);
+int dialog_textbox(const char *title, char *tbuf, int initial_height,
+                  int initial_width, int *keys, int *_vscroll, int *_hscroll,
+                  update_text_fn update_text, void *data);
+int dialog_menu(const char *title, const char *prompt,
+               const void *selected, int *s_scroll);
+int dialog_checklist(const char *title, const char *prompt, int height,
+                    int width, int list_height);
+int dialog_inputbox(const char *title, const char *prompt, int height,
+                   int width, const char *init);
+
+/*
+ * This is the base for fictitious keys, which activate
+ * the buttons.
+ *
+ * Mouse-generated keys are the following:
+ *   -- the first 32 are used as numbers, in addition to '0'-'9'
+ *   -- the lowercase are used to signal mouse-enter events (M_EVENT + 'o')
+ *   -- uppercase chars are used to invoke the button (M_EVENT + 'O')
+ */
+#define M_EVENT (KEY_MAX+1)
diff --git a/xen/tools/kconfig/lxdialog/inputbox.c 
b/xen/tools/kconfig/lxdialog/inputbox.c
new file mode 100644
index 0000000..d58de1d
--- /dev/null
+++ b/xen/tools/kconfig/lxdialog/inputbox.c
@@ -0,0 +1,301 @@
+/*
+ *  inputbox.c -- implements the input box
+ *
+ *  ORIGINAL AUTHOR: Savio Lam (lam836@xxxxxxxxxx)
+ *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@xxxxxxx)
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "dialog.h"
+
+char dialog_input_result[MAX_LEN + 1];
+
+/*
+ *  Print the termination buttons
+ */
+static void print_buttons(WINDOW * dialog, int height, int width, int selected)
+{
+       int x = width / 2 - 11;
+       int y = height - 2;
+
+       print_button(dialog, gettext("  Ok  "), y, x, selected == 0);
+       print_button(dialog, gettext(" Help "), y, x + 14, selected == 1);
+
+       wmove(dialog, y, x + 1 + 14 * selected);
+       wrefresh(dialog);
+}
+
+/*
+ * Display a dialog box for inputing a string
+ */
+int dialog_inputbox(const char *title, const char *prompt, int height, int 
width,
+                   const char *init)
+{
+       int i, x, y, box_y, box_x, box_width;
+       int input_x = 0, key = 0, button = -1;
+       int show_x, len, pos;
+       char *instr = dialog_input_result;
+       WINDOW *dialog;
+
+       if (!init)
+               instr[0] = '\0';
+       else
+               strcpy(instr, init);
+
+do_resize:
+       if (getmaxy(stdscr) <= (height - INPUTBOX_HEIGTH_MIN))
+               return -ERRDISPLAYTOOSMALL;
+       if (getmaxx(stdscr) <= (width - INPUTBOX_WIDTH_MIN))
+               return -ERRDISPLAYTOOSMALL;
+
+       /* center dialog box on screen */
+       x = (getmaxx(stdscr) - width) / 2;
+       y = (getmaxy(stdscr) - height) / 2;
+
+       draw_shadow(stdscr, y, x, height, width);
+
+       dialog = newwin(height, width, y, x);
+       keypad(dialog, TRUE);
+
+       draw_box(dialog, 0, 0, height, width,
+                dlg.dialog.atr, dlg.border.atr);
+       wattrset(dialog, dlg.border.atr);
+       mvwaddch(dialog, height - 3, 0, ACS_LTEE);
+       for (i = 0; i < width - 2; i++)
+               waddch(dialog, ACS_HLINE);
+       wattrset(dialog, dlg.dialog.atr);
+       waddch(dialog, ACS_RTEE);
+
+       print_title(dialog, title, width);
+
+       wattrset(dialog, dlg.dialog.atr);
+       print_autowrap(dialog, prompt, width - 2, 1, 3);
+
+       /* Draw the input field box */
+       box_width = width - 6;
+       getyx(dialog, y, x);
+       box_y = y + 2;
+       box_x = (width - box_width) / 2;
+       draw_box(dialog, y + 1, box_x - 1, 3, box_width + 2,
+                dlg.dialog.atr, dlg.border.atr);
+
+       print_buttons(dialog, height, width, 0);
+
+       /* Set up the initial value */
+       wmove(dialog, box_y, box_x);
+       wattrset(dialog, dlg.inputbox.atr);
+
+       len = strlen(instr);
+       pos = len;
+
+       if (len >= box_width) {
+               show_x = len - box_width + 1;
+               input_x = box_width - 1;
+               for (i = 0; i < box_width - 1; i++)
+                       waddch(dialog, instr[show_x + i]);
+       } else {
+               show_x = 0;
+               input_x = len;
+               waddstr(dialog, instr);
+       }
+
+       wmove(dialog, box_y, box_x + input_x);
+
+       wrefresh(dialog);
+
+       while (key != KEY_ESC) {
+               key = wgetch(dialog);
+
+               if (button == -1) {     /* Input box selected */
+                       switch (key) {
+                       case TAB:
+                       case KEY_UP:
+                       case KEY_DOWN:
+                               break;
+                       case KEY_BACKSPACE:
+                       case 127:
+                               if (pos) {
+                                       wattrset(dialog, dlg.inputbox.atr);
+                                       if (input_x == 0) {
+                                               show_x--;
+                                       } else
+                                               input_x--;
+
+                                       if (pos < len) {
+                                               for (i = pos - 1; i < len; i++) 
{
+                                                       instr[i] = instr[i+1];
+                                               }
+                                       }
+
+                                       pos--;
+                                       len--;
+                                       instr[len] = '\0';
+                                       wmove(dialog, box_y, box_x);
+                                       for (i = 0; i < box_width; i++) {
+                                               if (!instr[show_x + i]) {
+                                                       waddch(dialog, ' ');
+                                                       break;
+                                               }
+                                               waddch(dialog, instr[show_x + 
i]);
+                                       }
+                                       wmove(dialog, box_y, input_x + box_x);
+                                       wrefresh(dialog);
+                               }
+                               continue;
+                       case KEY_LEFT:
+                               if (pos > 0) {
+                                       if (input_x > 0) {
+                                               wmove(dialog, box_y, --input_x 
+ box_x);
+                                       } else if (input_x == 0) {
+                                               show_x--;
+                                               wmove(dialog, box_y, box_x);
+                                               for (i = 0; i < box_width; i++) 
{
+                                                       if (!instr[show_x + i]) 
{
+                                                               waddch(dialog, 
' ');
+                                                               break;
+                                                       }
+                                                       waddch(dialog, 
instr[show_x + i]);
+                                               }
+                                               wmove(dialog, box_y, box_x);
+                                       }
+                                       pos--;
+                               }
+                               continue;
+                       case KEY_RIGHT:
+                               if (pos < len) {
+                                       if (input_x < box_width - 1) {
+                                               wmove(dialog, box_y, ++input_x 
+ box_x);
+                                       } else if (input_x == box_width - 1) {
+                                               show_x++;
+                                               wmove(dialog, box_y, box_x);
+                                               for (i = 0; i < box_width; i++) 
{
+                                                       if (!instr[show_x + i]) 
{
+                                                               waddch(dialog, 
' ');
+                                                               break;
+                                                       }
+                                                       waddch(dialog, 
instr[show_x + i]);
+                                               }
+                                               wmove(dialog, box_y, input_x + 
box_x);
+                                       }
+                                       pos++;
+                               }
+                               continue;
+                       default:
+                               if (key < 0x100 && isprint(key)) {
+                                       if (len < MAX_LEN) {
+                                               wattrset(dialog, 
dlg.inputbox.atr);
+                                               if (pos < len) {
+                                                       for (i = len; i > pos; 
i--)
+                                                               instr[i] = 
instr[i-1];
+                                                       instr[pos] = key;
+                                               } else {
+                                                       instr[len] = key;
+                                               }
+                                               pos++;
+                                               len++;
+                                               instr[len] = '\0';
+
+                                               if (input_x == box_width - 1) {
+                                                       show_x++;
+                                               } else {
+                                                       input_x++;
+                                               }
+
+                                               wmove(dialog, box_y, box_x);
+                                               for (i = 0; i < box_width; i++) 
{
+                                                       if (!instr[show_x + i]) 
{
+                                                               waddch(dialog, 
' ');
+                                                               break;
+                                                       }
+                                                       waddch(dialog, 
instr[show_x + i]);
+                                               }
+                                               wmove(dialog, box_y, input_x + 
box_x);
+                                               wrefresh(dialog);
+                                       } else
+                                               flash();        /* Alarm user 
about overflow */
+                                       continue;
+                               }
+                       }
+               }
+               switch (key) {
+               case 'O':
+               case 'o':
+                       delwin(dialog);
+                       return 0;
+               case 'H':
+               case 'h':
+                       delwin(dialog);
+                       return 1;
+               case KEY_UP:
+               case KEY_LEFT:
+                       switch (button) {
+                       case -1:
+                               button = 1;     /* Indicates "Help" button is 
selected */
+                               print_buttons(dialog, height, width, 1);
+                               break;
+                       case 0:
+                               button = -1;    /* Indicates input box is 
selected */
+                               print_buttons(dialog, height, width, 0);
+                               wmove(dialog, box_y, box_x + input_x);
+                               wrefresh(dialog);
+                               break;
+                       case 1:
+                               button = 0;     /* Indicates "OK" button is 
selected */
+                               print_buttons(dialog, height, width, 0);
+                               break;
+                       }
+                       break;
+               case TAB:
+               case KEY_DOWN:
+               case KEY_RIGHT:
+                       switch (button) {
+                       case -1:
+                               button = 0;     /* Indicates "OK" button is 
selected */
+                               print_buttons(dialog, height, width, 0);
+                               break;
+                       case 0:
+                               button = 1;     /* Indicates "Help" button is 
selected */
+                               print_buttons(dialog, height, width, 1);
+                               break;
+                       case 1:
+                               button = -1;    /* Indicates input box is 
selected */
+                               print_buttons(dialog, height, width, 0);
+                               wmove(dialog, box_y, box_x + input_x);
+                               wrefresh(dialog);
+                               break;
+                       }
+                       break;
+               case ' ':
+               case '\n':
+                       delwin(dialog);
+                       return (button == -1 ? 0 : button);
+               case 'X':
+               case 'x':
+                       key = KEY_ESC;
+                       break;
+               case KEY_ESC:
+                       key = on_key_esc(dialog);
+                       break;
+               case KEY_RESIZE:
+                       delwin(dialog);
+                       on_key_resize();
+                       goto do_resize;
+               }
+       }
+
+       delwin(dialog);
+       return KEY_ESC;         /* ESC pressed */
+}
diff --git a/xen/tools/kconfig/lxdialog/menubox.c 
b/xen/tools/kconfig/lxdialog/menubox.c
new file mode 100644
index 0000000..11ae9ad
--- /dev/null
+++ b/xen/tools/kconfig/lxdialog/menubox.c
@@ -0,0 +1,437 @@
+/*
+ *  menubox.c -- implements the menu box
+ *
+ *  ORIGINAL AUTHOR: Savio Lam (lam836@xxxxxxxxxx)
+ *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcapw@xxxxxxx)
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/*
+ *  Changes by Clifford Wolf (god@xxxxxxxxxxx)
+ *
+ *  [ 1998-06-13 ]
+ *
+ *    *)  A bugfix for the Page-Down problem
+ *
+ *    *)  Formerly when I used Page Down and Page Up, the cursor would be set
+ *        to the first position in the menu box.  Now lxdialog is a bit
+ *        smarter and works more like other menu systems (just have a look at
+ *        it).
+ *
+ *    *)  Formerly if I selected something my scrolling would be broken because
+ *        lxdialog is re-invoked by the Menuconfig shell script, can't
+ *        remember the last scrolling position, and just sets it so that the
+ *        cursor is at the bottom of the box.  Now it writes the temporary file
+ *        lxdialog.scrltmp which contains this information. The file is
+ *        deleted by lxdialog if the user leaves a submenu or enters a new
+ *        one, but it would be nice if Menuconfig could make another "rm -f"
+ *        just to be sure.  Just try it out - you will recognise a difference!
+ *
+ *  [ 1998-06-14 ]
+ *
+ *    *)  Now lxdialog is crash-safe against broken "lxdialog.scrltmp" files
+ *        and menus change their size on the fly.
+ *
+ *    *)  If for some reason the last scrolling position is not saved by
+ *        lxdialog, it sets the scrolling so that the selected item is in the
+ *        middle of the menu box, not at the bottom.
+ *
+ * 02 January 1999, Michael Elizabeth Chastain (mec@xxxxxxxxx)
+ * Reset 'scroll' to 0 if the value from lxdialog.scrltmp is bogus.
+ * This fixes a bug in Menuconfig where using ' ' to descend into menus
+ * would leave mis-synchronized lxdialog.scrltmp files lying around,
+ * fscanf would read in 'scroll', and eventually that value would get used.
+ */
+
+#include "dialog.h"
+
+static int menu_width, item_x;
+
+/*
+ * Print menu item
+ */
+static void do_print_item(WINDOW * win, const char *item, int line_y,
+                         int selected, int hotkey)
+{
+       int j;
+       char *menu_item = malloc(menu_width + 1);
+
+       strncpy(menu_item, item, menu_width - item_x);
+       menu_item[menu_width - item_x] = '\0';
+       j = first_alpha(menu_item, "YyNnMmHh");
+
+       /* Clear 'residue' of last item */
+       wattrset(win, dlg.menubox.atr);
+       wmove(win, line_y, 0);
+#if OLD_NCURSES
+       {
+               int i;
+               for (i = 0; i < menu_width; i++)
+                       waddch(win, ' ');
+       }
+#else
+       wclrtoeol(win);
+#endif
+       wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
+       mvwaddstr(win, line_y, item_x, menu_item);
+       if (hotkey) {
+               wattrset(win, selected ? dlg.tag_key_selected.atr
+                        : dlg.tag_key.atr);
+               mvwaddch(win, line_y, item_x + j, menu_item[j]);
+       }
+       if (selected) {
+               wmove(win, line_y, item_x + 1);
+       }
+       free(menu_item);
+       wrefresh(win);
+}
+
+#define print_item(index, choice, selected)                            \
+do {                                                                   \
+       item_set(index);                                                \
+       do_print_item(menu, item_str(), choice, selected, !item_is_tag(':')); \
+} while (0)
+
+/*
+ * Print the scroll indicators.
+ */
+static void print_arrows(WINDOW * win, int item_no, int scroll, int y, int x,
+                        int height)
+{
+       int cur_y, cur_x;
+
+       getyx(win, cur_y, cur_x);
+
+       wmove(win, y, x);
+
+       if (scroll > 0) {
+               wattrset(win, dlg.uarrow.atr);
+               waddch(win, ACS_UARROW);
+               waddstr(win, "(-)");
+       } else {
+               wattrset(win, dlg.menubox.atr);
+               waddch(win, ACS_HLINE);
+               waddch(win, ACS_HLINE);
+               waddch(win, ACS_HLINE);
+               waddch(win, ACS_HLINE);
+       }
+
+       y = y + height + 1;
+       wmove(win, y, x);
+       wrefresh(win);
+
+       if ((height < item_no) && (scroll + height < item_no)) {
+               wattrset(win, dlg.darrow.atr);
+               waddch(win, ACS_DARROW);
+               waddstr(win, "(+)");
+       } else {
+               wattrset(win, dlg.menubox_border.atr);
+               waddch(win, ACS_HLINE);
+               waddch(win, ACS_HLINE);
+               waddch(win, ACS_HLINE);
+               waddch(win, ACS_HLINE);
+       }
+
+       wmove(win, cur_y, cur_x);
+       wrefresh(win);
+}
+
+/*
+ * Display the termination buttons.
+ */
+static void print_buttons(WINDOW * win, int height, int width, int selected)
+{
+       int x = width / 2 - 28;
+       int y = height - 2;
+
+       print_button(win, gettext("Select"), y, x, selected == 0);
+       print_button(win, gettext(" Exit "), y, x + 12, selected == 1);
+       print_button(win, gettext(" Help "), y, x + 24, selected == 2);
+       print_button(win, gettext(" Save "), y, x + 36, selected == 3);
+       print_button(win, gettext(" Load "), y, x + 48, selected == 4);
+
+       wmove(win, y, x + 1 + 12 * selected);
+       wrefresh(win);
+}
+
+/* scroll up n lines (n may be negative) */
+static void do_scroll(WINDOW *win, int *scroll, int n)
+{
+       /* Scroll menu up */
+       scrollok(win, TRUE);
+       wscrl(win, n);
+       scrollok(win, FALSE);
+       *scroll = *scroll + n;
+       wrefresh(win);
+}
+
+/*
+ * Display a menu for choosing among a number of options
+ */
+int dialog_menu(const char *title, const char *prompt,
+               const void *selected, int *s_scroll)
+{
+       int i, j, x, y, box_x, box_y;
+       int height, width, menu_height;
+       int key = 0, button = 0, scroll = 0, choice = 0;
+       int first_item =  0, max_choice;
+       WINDOW *dialog, *menu;
+
+do_resize:
+       height = getmaxy(stdscr);
+       width = getmaxx(stdscr);
+       if (height < MENUBOX_HEIGTH_MIN || width < MENUBOX_WIDTH_MIN)
+               return -ERRDISPLAYTOOSMALL;
+
+       height -= 4;
+       width  -= 5;
+       menu_height = height - 10;
+
+       max_choice = MIN(menu_height, item_count());
+
+       /* center dialog box on screen */
+       x = (getmaxx(stdscr) - width) / 2;
+       y = (getmaxy(stdscr) - height) / 2;
+
+       draw_shadow(stdscr, y, x, height, width);
+
+       dialog = newwin(height, width, y, x);
+       keypad(dialog, TRUE);
+
+       draw_box(dialog, 0, 0, height, width,
+                dlg.dialog.atr, dlg.border.atr);
+       wattrset(dialog, dlg.border.atr);
+       mvwaddch(dialog, height - 3, 0, ACS_LTEE);
+       for (i = 0; i < width - 2; i++)
+               waddch(dialog, ACS_HLINE);
+       wattrset(dialog, dlg.dialog.atr);
+       wbkgdset(dialog, dlg.dialog.atr & A_COLOR);
+       waddch(dialog, ACS_RTEE);
+
+       print_title(dialog, title, width);
+
+       wattrset(dialog, dlg.dialog.atr);
+       print_autowrap(dialog, prompt, width - 2, 1, 3);
+
+       menu_width = width - 6;
+       box_y = height - menu_height - 5;
+       box_x = (width - menu_width) / 2 - 1;
+
+       /* create new window for the menu */
+       menu = subwin(dialog, menu_height, menu_width,
+                     y + box_y + 1, x + box_x + 1);
+       keypad(menu, TRUE);
+
+       /* draw a box around the menu items */
+       draw_box(dialog, box_y, box_x, menu_height + 2, menu_width + 2,
+                dlg.menubox_border.atr, dlg.menubox.atr);
+
+       if (menu_width >= 80)
+               item_x = (menu_width - 70) / 2;
+       else
+               item_x = 4;
+
+       /* Set choice to default item */
+       item_foreach()
+               if (selected && (selected == item_data()))
+                       choice = item_n();
+       /* get the saved scroll info */
+       scroll = *s_scroll;
+       if ((scroll <= choice) && (scroll + max_choice > choice) &&
+          (scroll >= 0) && (scroll + max_choice <= item_count())) {
+               first_item = scroll;
+               choice = choice - scroll;
+       } else {
+               scroll = 0;
+       }
+       if ((choice >= max_choice)) {
+               if (choice >= item_count() - max_choice / 2)
+                       scroll = first_item = item_count() - max_choice;
+               else
+                       scroll = first_item = choice - max_choice / 2;
+               choice = choice - scroll;
+       }
+
+       /* Print the menu */
+       for (i = 0; i < max_choice; i++) {
+               print_item(first_item + i, i, i == choice);
+       }
+
+       wnoutrefresh(menu);
+
+       print_arrows(dialog, item_count(), scroll,
+                    box_y, box_x + item_x + 1, menu_height);
+
+       print_buttons(dialog, height, width, 0);
+       wmove(menu, choice, item_x + 1);
+       wrefresh(menu);
+
+       while (key != KEY_ESC) {
+               key = wgetch(menu);
+
+               if (key < 256 && isalpha(key))
+                       key = tolower(key);
+
+               if (strchr("ynmh", key))
+                       i = max_choice;
+               else {
+                       for (i = choice + 1; i < max_choice; i++) {
+                               item_set(scroll + i);
+                               j = first_alpha(item_str(), "YyNnMmHh");
+                               if (key == tolower(item_str()[j]))
+                                       break;
+                       }
+                       if (i == max_choice)
+                               for (i = 0; i < max_choice; i++) {
+                                       item_set(scroll + i);
+                                       j = first_alpha(item_str(), "YyNnMmHh");
+                                       if (key == tolower(item_str()[j]))
+                                               break;
+                               }
+               }
+
+               if (item_count() != 0 &&
+                   (i < max_choice ||
+                    key == KEY_UP || key == KEY_DOWN ||
+                    key == '-' || key == '+' ||
+                    key == KEY_PPAGE || key == KEY_NPAGE)) {
+                       /* Remove highligt of current item */
+                       print_item(scroll + choice, choice, FALSE);
+
+                       if (key == KEY_UP || key == '-') {
+                               if (choice < 2 && scroll) {
+                                       /* Scroll menu down */
+                                       do_scroll(menu, &scroll, -1);
+
+                                       print_item(scroll, 0, FALSE);
+                               } else
+                                       choice = MAX(choice - 1, 0);
+
+                       } else if (key == KEY_DOWN || key == '+') {
+                               print_item(scroll+choice, choice, FALSE);
+
+                               if ((choice > max_choice - 3) &&
+                                   (scroll + max_choice < item_count())) {
+                                       /* Scroll menu up */
+                                       do_scroll(menu, &scroll, 1);
+
+                                       print_item(scroll+max_choice - 1,
+                                                  max_choice - 1, FALSE);
+                               } else
+                                       choice = MIN(choice + 1, max_choice - 
1);
+
+                       } else if (key == KEY_PPAGE) {
+                               scrollok(menu, TRUE);
+                               for (i = 0; (i < max_choice); i++) {
+                                       if (scroll > 0) {
+                                               do_scroll(menu, &scroll, -1);
+                                               print_item(scroll, 0, FALSE);
+                                       } else {
+                                               if (choice > 0)
+                                                       choice--;
+                                       }
+                               }
+
+                       } else if (key == KEY_NPAGE) {
+                               for (i = 0; (i < max_choice); i++) {
+                                       if (scroll + max_choice < item_count()) 
{
+                                               do_scroll(menu, &scroll, 1);
+                                               print_item(scroll+max_choice-1,
+                                                          max_choice - 1, 
FALSE);
+                                       } else {
+                                               if (choice + 1 < max_choice)
+                                                       choice++;
+                                       }
+                               }
+                       } else
+                               choice = i;
+
+                       print_item(scroll + choice, choice, TRUE);
+
+                       print_arrows(dialog, item_count(), scroll,
+                                    box_y, box_x + item_x + 1, menu_height);
+
+                       wnoutrefresh(dialog);
+                       wrefresh(menu);
+
+                       continue;       /* wait for another key press */
+               }
+
+               switch (key) {
+               case KEY_LEFT:
+               case TAB:
+               case KEY_RIGHT:
+                       button = ((key == KEY_LEFT ? --button : ++button) < 0)
+                           ? 4 : (button > 4 ? 0 : button);
+
+                       print_buttons(dialog, height, width, button);
+                       wrefresh(menu);
+                       break;
+               case ' ':
+               case 's':
+               case 'y':
+               case 'n':
+               case 'm':
+               case '/':
+               case 'h':
+               case '?':
+               case 'z':
+               case '\n':
+                       /* save scroll info */
+                       *s_scroll = scroll;
+                       delwin(menu);
+                       delwin(dialog);
+                       item_set(scroll + choice);
+                       item_set_selected(1);
+                       switch (key) {
+                       case 'h':
+                       case '?':
+                               return 2;
+                       case 's':
+                       case 'y':
+                               return 5;
+                       case 'n':
+                               return 6;
+                       case 'm':
+                               return 7;
+                       case ' ':
+                               return 8;
+                       case '/':
+                               return 9;
+                       case 'z':
+                               return 10;
+                       case '\n':
+                               return button;
+                       }
+                       return 0;
+               case 'e':
+               case 'x':
+                       key = KEY_ESC;
+                       break;
+               case KEY_ESC:
+                       key = on_key_esc(menu);
+                       break;
+               case KEY_RESIZE:
+                       on_key_resize();
+                       delwin(menu);
+                       delwin(dialog);
+                       goto do_resize;
+               }
+       }
+       delwin(menu);
+       delwin(dialog);
+       return key;             /* ESC pressed */
+}
diff --git a/xen/tools/kconfig/lxdialog/textbox.c 
b/xen/tools/kconfig/lxdialog/textbox.c
new file mode 100644
index 0000000..1773319
--- /dev/null
+++ b/xen/tools/kconfig/lxdialog/textbox.c
@@ -0,0 +1,408 @@
+/*
+ *  textbox.c -- implements the text box
+ *
+ *  ORIGINAL AUTHOR: Savio Lam (lam836@xxxxxxxxxx)
+ *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@xxxxxxx)
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "dialog.h"
+
+static void back_lines(int n);
+static void print_page(WINDOW *win, int height, int width, update_text_fn
+                      update_text, void *data);
+static void print_line(WINDOW *win, int row, int width);
+static char *get_line(void);
+static void print_position(WINDOW * win);
+
+static int hscroll;
+static int begin_reached, end_reached, page_length;
+static char *buf;
+static char *page;
+
+/*
+ * refresh window content
+ */
+static void refresh_text_box(WINDOW *dialog, WINDOW *box, int boxh, int boxw,
+                            int cur_y, int cur_x, update_text_fn update_text,
+                            void *data)
+{
+       print_page(box, boxh, boxw, update_text, data);
+       print_position(dialog);
+       wmove(dialog, cur_y, cur_x);    /* Restore cursor position */
+       wrefresh(dialog);
+}
+
+
+/*
+ * Display text from a file in a dialog box.
+ *
+ * keys is a null-terminated array
+ * update_text() may not add or remove any '\n' or '\0' in tbuf
+ */
+int dialog_textbox(const char *title, char *tbuf, int initial_height,
+                  int initial_width, int *keys, int *_vscroll, int *_hscroll,
+                  update_text_fn update_text, void *data)
+{
+       int i, x, y, cur_x, cur_y, key = 0;
+       int height, width, boxh, boxw;
+       WINDOW *dialog, *box;
+       bool done = false;
+
+       begin_reached = 1;
+       end_reached = 0;
+       page_length = 0;
+       hscroll = 0;
+       buf = tbuf;
+       page = buf;     /* page is pointer to start of page to be displayed */
+
+       if (_vscroll && *_vscroll) {
+               begin_reached = 0;
+
+               for (i = 0; i < *_vscroll; i++)
+                       get_line();
+       }
+       if (_hscroll)
+               hscroll = *_hscroll;
+
+do_resize:
+       getmaxyx(stdscr, height, width);
+       if (height < TEXTBOX_HEIGTH_MIN || width < TEXTBOX_WIDTH_MIN)
+               return -ERRDISPLAYTOOSMALL;
+       if (initial_height != 0)
+               height = initial_height;
+       else
+               if (height > 4)
+                       height -= 4;
+               else
+                       height = 0;
+       if (initial_width != 0)
+               width = initial_width;
+       else
+               if (width > 5)
+                       width -= 5;
+               else
+                       width = 0;
+
+       /* center dialog box on screen */
+       x = (getmaxx(stdscr) - width) / 2;
+       y = (getmaxy(stdscr) - height) / 2;
+
+       draw_shadow(stdscr, y, x, height, width);
+
+       dialog = newwin(height, width, y, x);
+       keypad(dialog, TRUE);
+
+       /* Create window for box region, used for scrolling text */
+       boxh = height - 4;
+       boxw = width - 2;
+       box = subwin(dialog, boxh, boxw, y + 1, x + 1);
+       wattrset(box, dlg.dialog.atr);
+       wbkgdset(box, dlg.dialog.atr & A_COLOR);
+
+       keypad(box, TRUE);
+
+       /* register the new window, along with its borders */
+       draw_box(dialog, 0, 0, height, width,
+                dlg.dialog.atr, dlg.border.atr);
+
+       wattrset(dialog, dlg.border.atr);
+       mvwaddch(dialog, height - 3, 0, ACS_LTEE);
+       for (i = 0; i < width - 2; i++)
+               waddch(dialog, ACS_HLINE);
+       wattrset(dialog, dlg.dialog.atr);
+       wbkgdset(dialog, dlg.dialog.atr & A_COLOR);
+       waddch(dialog, ACS_RTEE);
+
+       print_title(dialog, title, width);
+
+       print_button(dialog, gettext(" Exit "), height - 2, width / 2 - 4, 
TRUE);
+       wnoutrefresh(dialog);
+       getyx(dialog, cur_y, cur_x);    /* Save cursor position */
+
+       /* Print first page of text */
+       attr_clear(box, boxh, boxw, dlg.dialog.atr);
+       refresh_text_box(dialog, box, boxh, boxw, cur_y, cur_x, update_text,
+                        data);
+
+       while (!done) {
+               key = wgetch(dialog);
+               switch (key) {
+               case 'E':       /* Exit */
+               case 'e':
+               case 'X':
+               case 'x':
+               case 'q':
+               case '\n':
+                       done = true;
+                       break;
+               case 'g':       /* First page */
+               case KEY_HOME:
+                       if (!begin_reached) {
+                               begin_reached = 1;
+                               page = buf;
+                               refresh_text_box(dialog, box, boxh, boxw,
+                                                cur_y, cur_x, update_text,
+                                                data);
+                       }
+                       break;
+               case 'G':       /* Last page */
+               case KEY_END:
+
+                       end_reached = 1;
+                       /* point to last char in buf */
+                       page = buf + strlen(buf);
+                       back_lines(boxh);
+                       refresh_text_box(dialog, box, boxh, boxw, cur_y,
+                                        cur_x, update_text, data);
+                       break;
+               case 'K':       /* Previous line */
+               case 'k':
+               case KEY_UP:
+                       if (begin_reached)
+                               break;
+
+                       back_lines(page_length + 1);
+                       refresh_text_box(dialog, box, boxh, boxw, cur_y,
+                                        cur_x, update_text, data);
+                       break;
+               case 'B':       /* Previous page */
+               case 'b':
+               case 'u':
+               case KEY_PPAGE:
+                       if (begin_reached)
+                               break;
+                       back_lines(page_length + boxh);
+                       refresh_text_box(dialog, box, boxh, boxw, cur_y,
+                                        cur_x, update_text, data);
+                       break;
+               case 'J':       /* Next line */
+               case 'j':
+               case KEY_DOWN:
+                       if (end_reached)
+                               break;
+
+                       back_lines(page_length - 1);
+                       refresh_text_box(dialog, box, boxh, boxw, cur_y,
+                                        cur_x, update_text, data);
+                       break;
+               case KEY_NPAGE: /* Next page */
+               case ' ':
+               case 'd':
+                       if (end_reached)
+                               break;
+
+                       begin_reached = 0;
+                       refresh_text_box(dialog, box, boxh, boxw, cur_y,
+                                        cur_x, update_text, data);
+                       break;
+               case '0':       /* Beginning of line */
+               case 'H':       /* Scroll left */
+               case 'h':
+               case KEY_LEFT:
+                       if (hscroll <= 0)
+                               break;
+
+                       if (key == '0')
+                               hscroll = 0;
+                       else
+                               hscroll--;
+                       /* Reprint current page to scroll horizontally */
+                       back_lines(page_length);
+                       refresh_text_box(dialog, box, boxh, boxw, cur_y,
+                                        cur_x, update_text, data);
+                       break;
+               case 'L':       /* Scroll right */
+               case 'l':
+               case KEY_RIGHT:
+                       if (hscroll >= MAX_LEN)
+                               break;
+                       hscroll++;
+                       /* Reprint current page to scroll horizontally */
+                       back_lines(page_length);
+                       refresh_text_box(dialog, box, boxh, boxw, cur_y,
+                                        cur_x, update_text, data);
+                       break;
+               case KEY_ESC:
+                       if (on_key_esc(dialog) == KEY_ESC)
+                               done = true;
+                       break;
+               case KEY_RESIZE:
+                       back_lines(height);
+                       delwin(box);
+                       delwin(dialog);
+                       on_key_resize();
+                       goto do_resize;
+               default:
+                       for (i = 0; keys[i]; i++) {
+                               if (key == keys[i]) {
+                                       done = true;
+                                       break;
+                               }
+                       }
+               }
+       }
+       delwin(box);
+       delwin(dialog);
+       if (_vscroll) {
+               const char *s;
+
+               s = buf;
+               *_vscroll = 0;
+               back_lines(page_length);
+               while (s < page && (s = strchr(s, '\n'))) {
+                       (*_vscroll)++;
+                       s++;
+               }
+       }
+       if (_hscroll)
+               *_hscroll = hscroll;
+       return key;
+}
+
+/*
+ * Go back 'n' lines in text. Called by dialog_textbox().
+ * 'page' will be updated to point to the desired line in 'buf'.
+ */
+static void back_lines(int n)
+{
+       int i;
+
+       begin_reached = 0;
+       /* Go back 'n' lines */
+       for (i = 0; i < n; i++) {
+               if (*page == '\0') {
+                       if (end_reached) {
+                               end_reached = 0;
+                               continue;
+                       }
+               }
+               if (page == buf) {
+                       begin_reached = 1;
+                       return;
+               }
+               page--;
+               do {
+                       if (page == buf) {
+                               begin_reached = 1;
+                               return;
+                       }
+                       page--;
+               } while (*page != '\n');
+               page++;
+       }
+}
+
+/*
+ * Print a new page of text.
+ */
+static void print_page(WINDOW *win, int height, int width, update_text_fn
+                      update_text, void *data)
+{
+       int i, passed_end = 0;
+
+       if (update_text) {
+               char *end;
+
+               for (i = 0; i < height; i++)
+                       get_line();
+               end = page;
+               back_lines(height);
+               update_text(buf, page - buf, end - buf, data);
+       }
+
+       page_length = 0;
+       for (i = 0; i < height; i++) {
+               print_line(win, i, width);
+               if (!passed_end)
+                       page_length++;
+               if (end_reached && !passed_end)
+                       passed_end = 1;
+       }
+       wnoutrefresh(win);
+}
+
+/*
+ * Print a new line of text.
+ */
+static void print_line(WINDOW * win, int row, int width)
+{
+       char *line;
+
+       line = get_line();
+       line += MIN(strlen(line), hscroll);     /* Scroll horizontally */
+       wmove(win, row, 0);     /* move cursor to correct line */
+       waddch(win, ' ');
+       waddnstr(win, line, MIN(strlen(line), width - 2));
+
+       /* Clear 'residue' of previous line */
+#if OLD_NCURSES
+       {
+               int x = getcurx(win);
+               int i;
+               for (i = 0; i < width - x; i++)
+                       waddch(win, ' ');
+       }
+#else
+       wclrtoeol(win);
+#endif
+}
+
+/*
+ * Return current line of text. Called by dialog_textbox() and print_line().
+ * 'page' should point to start of current line before calling, and will be
+ * updated to point to start of next line.
+ */
+static char *get_line(void)
+{
+       int i = 0;
+       static char line[MAX_LEN + 1];
+
+       end_reached = 0;
+       while (*page != '\n') {
+               if (*page == '\0') {
+                       end_reached = 1;
+                       break;
+               } else if (i < MAX_LEN)
+                       line[i++] = *(page++);
+               else {
+                       /* Truncate lines longer than MAX_LEN characters */
+                       if (i == MAX_LEN)
+                               line[i++] = '\0';
+                       page++;
+               }
+       }
+       if (i <= MAX_LEN)
+               line[i] = '\0';
+       if (!end_reached)
+               page++;         /* move past '\n' */
+
+       return line;
+}
+
+/*
+ * Print current position
+ */
+static void print_position(WINDOW * win)
+{
+       int percent;
+
+       wattrset(win, dlg.position_indicator.atr);
+       wbkgdset(win, dlg.position_indicator.atr & A_COLOR);
+       percent = (page - buf) * 100 / strlen(buf);
+       wmove(win, getmaxy(win) - 3, getmaxx(win) - 9);
+       wprintw(win, "(%3d%%)", percent);
+}
diff --git a/xen/tools/kconfig/lxdialog/util.c 
b/xen/tools/kconfig/lxdialog/util.c
new file mode 100644
index 0000000..f7abdeb
--- /dev/null
+++ b/xen/tools/kconfig/lxdialog/util.c
@@ -0,0 +1,713 @@
+/*
+ *  util.c
+ *
+ *  ORIGINAL AUTHOR: Savio Lam (lam836@xxxxxxxxxx)
+ *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@xxxxxxx)
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <stdarg.h>
+
+#include "dialog.h"
+
+/* Needed in signal handler in mconf.c */
+int saved_x, saved_y;
+
+struct dialog_info dlg;
+
+static void set_mono_theme(void)
+{
+       dlg.screen.atr = A_NORMAL;
+       dlg.shadow.atr = A_NORMAL;
+       dlg.dialog.atr = A_NORMAL;
+       dlg.title.atr = A_BOLD;
+       dlg.border.atr = A_NORMAL;
+       dlg.button_active.atr = A_REVERSE;
+       dlg.button_inactive.atr = A_DIM;
+       dlg.button_key_active.atr = A_REVERSE;
+       dlg.button_key_inactive.atr = A_BOLD;
+       dlg.button_label_active.atr = A_REVERSE;
+       dlg.button_label_inactive.atr = A_NORMAL;
+       dlg.inputbox.atr = A_NORMAL;
+       dlg.inputbox_border.atr = A_NORMAL;
+       dlg.searchbox.atr = A_NORMAL;
+       dlg.searchbox_title.atr = A_BOLD;
+       dlg.searchbox_border.atr = A_NORMAL;
+       dlg.position_indicator.atr = A_BOLD;
+       dlg.menubox.atr = A_NORMAL;
+       dlg.menubox_border.atr = A_NORMAL;
+       dlg.item.atr = A_NORMAL;
+       dlg.item_selected.atr = A_REVERSE;
+       dlg.tag.atr = A_BOLD;
+       dlg.tag_selected.atr = A_REVERSE;
+       dlg.tag_key.atr = A_BOLD;
+       dlg.tag_key_selected.atr = A_REVERSE;
+       dlg.check.atr = A_BOLD;
+       dlg.check_selected.atr = A_REVERSE;
+       dlg.uarrow.atr = A_BOLD;
+       dlg.darrow.atr = A_BOLD;
+}
+
+#define DLG_COLOR(dialog, f, b, h) \
+do {                               \
+       dlg.dialog.fg = (f);       \
+       dlg.dialog.bg = (b);       \
+       dlg.dialog.hl = (h);       \
+} while (0)
+
+static void set_classic_theme(void)
+{
+       DLG_COLOR(screen,                COLOR_CYAN,   COLOR_BLUE,   true);
+       DLG_COLOR(shadow,                COLOR_BLACK,  COLOR_BLACK,  true);
+       DLG_COLOR(dialog,                COLOR_BLACK,  COLOR_WHITE,  false);
+       DLG_COLOR(title,                 COLOR_YELLOW, COLOR_WHITE,  true);
+       DLG_COLOR(border,                COLOR_WHITE,  COLOR_WHITE,  true);
+       DLG_COLOR(button_active,         COLOR_WHITE,  COLOR_BLUE,   true);
+       DLG_COLOR(button_inactive,       COLOR_BLACK,  COLOR_WHITE,  false);
+       DLG_COLOR(button_key_active,     COLOR_WHITE,  COLOR_BLUE,   true);
+       DLG_COLOR(button_key_inactive,   COLOR_RED,    COLOR_WHITE,  false);
+       DLG_COLOR(button_label_active,   COLOR_YELLOW, COLOR_BLUE,   true);
+       DLG_COLOR(button_label_inactive, COLOR_BLACK,  COLOR_WHITE,  true);
+       DLG_COLOR(inputbox,              COLOR_BLACK,  COLOR_WHITE,  false);
+       DLG_COLOR(inputbox_border,       COLOR_BLACK,  COLOR_WHITE,  false);
+       DLG_COLOR(searchbox,             COLOR_BLACK,  COLOR_WHITE,  false);
+       DLG_COLOR(searchbox_title,       COLOR_YELLOW, COLOR_WHITE,  true);
+       DLG_COLOR(searchbox_border,      COLOR_WHITE,  COLOR_WHITE,  true);
+       DLG_COLOR(position_indicator,    COLOR_YELLOW, COLOR_WHITE,  true);
+       DLG_COLOR(menubox,               COLOR_BLACK,  COLOR_WHITE,  false);
+       DLG_COLOR(menubox_border,        COLOR_WHITE,  COLOR_WHITE,  true);
+       DLG_COLOR(item,                  COLOR_BLACK,  COLOR_WHITE,  false);
+       DLG_COLOR(item_selected,         COLOR_WHITE,  COLOR_BLUE,   true);
+       DLG_COLOR(tag,                   COLOR_YELLOW, COLOR_WHITE,  true);
+       DLG_COLOR(tag_selected,          COLOR_YELLOW, COLOR_BLUE,   true);
+       DLG_COLOR(tag_key,               COLOR_YELLOW, COLOR_WHITE,  true);
+       DLG_COLOR(tag_key_selected,      COLOR_YELLOW, COLOR_BLUE,   true);
+       DLG_COLOR(check,                 COLOR_BLACK,  COLOR_WHITE,  false);
+       DLG_COLOR(check_selected,        COLOR_WHITE,  COLOR_BLUE,   true);
+       DLG_COLOR(uarrow,                COLOR_GREEN,  COLOR_WHITE,  true);
+       DLG_COLOR(darrow,                COLOR_GREEN,  COLOR_WHITE,  true);
+}
+
+static void set_blackbg_theme(void)
+{
+       DLG_COLOR(screen, COLOR_RED,   COLOR_BLACK, true);
+       DLG_COLOR(shadow, COLOR_BLACK, COLOR_BLACK, false);
+       DLG_COLOR(dialog, COLOR_WHITE, COLOR_BLACK, false);
+       DLG_COLOR(title,  COLOR_RED,   COLOR_BLACK, false);
+       DLG_COLOR(border, COLOR_BLACK, COLOR_BLACK, true);
+
+       DLG_COLOR(button_active,         COLOR_YELLOW, COLOR_RED,   false);
+       DLG_COLOR(button_inactive,       COLOR_YELLOW, COLOR_BLACK, false);
+       DLG_COLOR(button_key_active,     COLOR_YELLOW, COLOR_RED,   true);
+       DLG_COLOR(button_key_inactive,   COLOR_RED,    COLOR_BLACK, false);
+       DLG_COLOR(button_label_active,   COLOR_WHITE,  COLOR_RED,   false);
+       DLG_COLOR(button_label_inactive, COLOR_BLACK,  COLOR_BLACK, true);
+
+       DLG_COLOR(inputbox,         COLOR_YELLOW, COLOR_BLACK, false);
+       DLG_COLOR(inputbox_border,  COLOR_YELLOW, COLOR_BLACK, false);
+
+       DLG_COLOR(searchbox,        COLOR_YELLOW, COLOR_BLACK, false);
+       DLG_COLOR(searchbox_title,  COLOR_YELLOW, COLOR_BLACK, true);
+       DLG_COLOR(searchbox_border, COLOR_BLACK,  COLOR_BLACK, true);
+
+       DLG_COLOR(position_indicator, COLOR_RED, COLOR_BLACK,  false);
+
+       DLG_COLOR(menubox,          COLOR_YELLOW, COLOR_BLACK, false);
+       DLG_COLOR(menubox_border,   COLOR_BLACK,  COLOR_BLACK, true);
+
+       DLG_COLOR(item,             COLOR_WHITE, COLOR_BLACK, false);
+       DLG_COLOR(item_selected,    COLOR_WHITE, COLOR_RED,   false);
+
+       DLG_COLOR(tag,              COLOR_RED,    COLOR_BLACK, false);
+       DLG_COLOR(tag_selected,     COLOR_YELLOW, COLOR_RED,   true);
+       DLG_COLOR(tag_key,          COLOR_RED,    COLOR_BLACK, false);
+       DLG_COLOR(tag_key_selected, COLOR_YELLOW, COLOR_RED,   true);
+
+       DLG_COLOR(check,            COLOR_YELLOW, COLOR_BLACK, false);
+       DLG_COLOR(check_selected,   COLOR_YELLOW, COLOR_RED,   true);
+
+       DLG_COLOR(uarrow, COLOR_RED, COLOR_BLACK, false);
+       DLG_COLOR(darrow, COLOR_RED, COLOR_BLACK, false);
+}
+
+static void set_bluetitle_theme(void)
+{
+       set_classic_theme();
+       DLG_COLOR(title,               COLOR_BLUE,   COLOR_WHITE, true);
+       DLG_COLOR(button_key_active,   COLOR_YELLOW, COLOR_BLUE,  true);
+       DLG_COLOR(button_label_active, COLOR_WHITE,  COLOR_BLUE,  true);
+       DLG_COLOR(searchbox_title,     COLOR_BLUE,   COLOR_WHITE, true);
+       DLG_COLOR(position_indicator,  COLOR_BLUE,   COLOR_WHITE, true);
+       DLG_COLOR(tag,                 COLOR_BLUE,   COLOR_WHITE, true);
+       DLG_COLOR(tag_key,             COLOR_BLUE,   COLOR_WHITE, true);
+
+}
+
+/*
+ * Select color theme
+ */
+static int set_theme(const char *theme)
+{
+       int use_color = 1;
+       if (!theme)
+               set_bluetitle_theme();
+       else if (strcmp(theme, "classic") == 0)
+               set_classic_theme();
+       else if (strcmp(theme, "bluetitle") == 0)
+               set_bluetitle_theme();
+       else if (strcmp(theme, "blackbg") == 0)
+               set_blackbg_theme();
+       else if (strcmp(theme, "mono") == 0)
+               use_color = 0;
+
+       return use_color;
+}
+
+static void init_one_color(struct dialog_color *color)
+{
+       static int pair = 0;
+
+       pair++;
+       init_pair(pair, color->fg, color->bg);
+       if (color->hl)
+               color->atr = A_BOLD | COLOR_PAIR(pair);
+       else
+               color->atr = COLOR_PAIR(pair);
+}
+
+static void init_dialog_colors(void)
+{
+       init_one_color(&dlg.screen);
+       init_one_color(&dlg.shadow);
+       init_one_color(&dlg.dialog);
+       init_one_color(&dlg.title);
+       init_one_color(&dlg.border);
+       init_one_color(&dlg.button_active);
+       init_one_color(&dlg.button_inactive);
+       init_one_color(&dlg.button_key_active);
+       init_one_color(&dlg.button_key_inactive);
+       init_one_color(&dlg.button_label_active);
+       init_one_color(&dlg.button_label_inactive);
+       init_one_color(&dlg.inputbox);
+       init_one_color(&dlg.inputbox_border);
+       init_one_color(&dlg.searchbox);
+       init_one_color(&dlg.searchbox_title);
+       init_one_color(&dlg.searchbox_border);
+       init_one_color(&dlg.position_indicator);
+       init_one_color(&dlg.menubox);
+       init_one_color(&dlg.menubox_border);
+       init_one_color(&dlg.item);
+       init_one_color(&dlg.item_selected);
+       init_one_color(&dlg.tag);
+       init_one_color(&dlg.tag_selected);
+       init_one_color(&dlg.tag_key);
+       init_one_color(&dlg.tag_key_selected);
+       init_one_color(&dlg.check);
+       init_one_color(&dlg.check_selected);
+       init_one_color(&dlg.uarrow);
+       init_one_color(&dlg.darrow);
+}
+
+/*
+ * Setup for color display
+ */
+static void color_setup(const char *theme)
+{
+       int use_color;
+
+       use_color = set_theme(theme);
+       if (use_color && has_colors()) {
+               start_color();
+               init_dialog_colors();
+       } else
+               set_mono_theme();
+}
+
+/*
+ * Set window to attribute 'attr'
+ */
+void attr_clear(WINDOW * win, int height, int width, chtype attr)
+{
+       int i, j;
+
+       wattrset(win, attr);
+       for (i = 0; i < height; i++) {
+               wmove(win, i, 0);
+               for (j = 0; j < width; j++)
+                       waddch(win, ' ');
+       }
+       touchwin(win);
+}
+
+void dialog_clear(void)
+{
+       int lines, columns;
+
+       lines = getmaxy(stdscr);
+       columns = getmaxx(stdscr);
+
+       attr_clear(stdscr, lines, columns, dlg.screen.atr);
+       /* Display background title if it exists ... - SLH */
+       if (dlg.backtitle != NULL) {
+               int i, len = 0, skip = 0;
+               struct subtitle_list *pos;
+
+               wattrset(stdscr, dlg.screen.atr);
+               mvwaddstr(stdscr, 0, 1, (char *)dlg.backtitle);
+
+               for (pos = dlg.subtitles; pos != NULL; pos = pos->next) {
+                       /* 3 is for the arrow and spaces */
+                       len += strlen(pos->text) + 3;
+               }
+
+               wmove(stdscr, 1, 1);
+               if (len > columns - 2) {
+                       const char *ellipsis = "[...] ";
+                       waddstr(stdscr, ellipsis);
+                       skip = len - (columns - 2 - strlen(ellipsis));
+               }
+
+               for (pos = dlg.subtitles; pos != NULL; pos = pos->next) {
+                       if (skip == 0)
+                               waddch(stdscr, ACS_RARROW);
+                       else
+                               skip--;
+
+                       if (skip == 0)
+                               waddch(stdscr, ' ');
+                       else
+                               skip--;
+
+                       if (skip < strlen(pos->text)) {
+                               waddstr(stdscr, pos->text + skip);
+                               skip = 0;
+                       } else
+                               skip -= strlen(pos->text);
+
+                       if (skip == 0)
+                               waddch(stdscr, ' ');
+                       else
+                               skip--;
+               }
+
+               for (i = len + 1; i < columns - 1; i++)
+                       waddch(stdscr, ACS_HLINE);
+       }
+       wnoutrefresh(stdscr);
+}
+
+/*
+ * Do some initialization for dialog
+ */
+int init_dialog(const char *backtitle)
+{
+       int height, width;
+
+       initscr();              /* Init curses */
+
+       /* Get current cursor position for signal handler in mconf.c */
+       getyx(stdscr, saved_y, saved_x);
+
+       getmaxyx(stdscr, height, width);
+       if (height < WINDOW_HEIGTH_MIN || width < WINDOW_WIDTH_MIN) {
+               endwin();
+               return -ERRDISPLAYTOOSMALL;
+       }
+
+       dlg.backtitle = backtitle;
+       color_setup(getenv("MENUCONFIG_COLOR"));
+
+       keypad(stdscr, TRUE);
+       cbreak();
+       noecho();
+       dialog_clear();
+
+       return 0;
+}
+
+void set_dialog_backtitle(const char *backtitle)
+{
+       dlg.backtitle = backtitle;
+}
+
+void set_dialog_subtitles(struct subtitle_list *subtitles)
+{
+       dlg.subtitles = subtitles;
+}
+
+/*
+ * End using dialog functions.
+ */
+void end_dialog(int x, int y)
+{
+       /* move cursor back to original position */
+       move(y, x);
+       refresh();
+       endwin();
+}
+
+/* Print the title of the dialog. Center the title and truncate
+ * tile if wider than dialog (- 2 chars).
+ **/
+void print_title(WINDOW *dialog, const char *title, int width)
+{
+       if (title) {
+               int tlen = MIN(width - 2, strlen(title));
+               wattrset(dialog, dlg.title.atr);
+               mvwaddch(dialog, 0, (width - tlen) / 2 - 1, ' ');
+               mvwaddnstr(dialog, 0, (width - tlen)/2, title, tlen);
+               waddch(dialog, ' ');
+       }
+}
+
+/*
+ * Print a string of text in a window, automatically wrap around to the
+ * next line if the string is too long to fit on one line. Newline
+ * characters '\n' are propperly processed.  We start on a new line
+ * if there is no room for at least 4 nonblanks following a double-space.
+ */
+void print_autowrap(WINDOW * win, const char *prompt, int width, int y, int x)
+{
+       int newl, cur_x, cur_y;
+       int prompt_len, room, wlen;
+       char tempstr[MAX_LEN + 1], *word, *sp, *sp2, *newline_separator = 0;
+
+       strcpy(tempstr, prompt);
+
+       prompt_len = strlen(tempstr);
+
+       if (prompt_len <= width - x * 2) {      /* If prompt is short */
+               wmove(win, y, (width - prompt_len) / 2);
+               waddstr(win, tempstr);
+       } else {
+               cur_x = x;
+               cur_y = y;
+               newl = 1;
+               word = tempstr;
+               while (word && *word) {
+                       sp = strpbrk(word, "\n ");
+                       if (sp && *sp == '\n')
+                               newline_separator = sp;
+
+                       if (sp)
+                               *sp++ = 0;
+
+                       /* Wrap to next line if either the word does not fit,
+                          or it is the first word of a new sentence, and it is
+                          short, and the next word does not fit. */
+                       room = width - cur_x;
+                       wlen = strlen(word);
+                       if (wlen > room ||
+                           (newl && wlen < 4 && sp
+                            && wlen + 1 + strlen(sp) > room
+                            && (!(sp2 = strpbrk(sp, "\n "))
+                                || wlen + 1 + (sp2 - sp) > room))) {
+                               cur_y++;
+                               cur_x = x;
+                       }
+                       wmove(win, cur_y, cur_x);
+                       waddstr(win, word);
+                       getyx(win, cur_y, cur_x);
+
+                       /* Move to the next line if the word separator was a 
newline */
+                       if (newline_separator) {
+                               cur_y++;
+                               cur_x = x;
+                               newline_separator = 0;
+                       } else
+                               cur_x++;
+
+                       if (sp && *sp == ' ') {
+                               cur_x++;        /* double space */
+                               while (*++sp == ' ') ;
+                               newl = 1;
+                       } else
+                               newl = 0;
+                       word = sp;
+               }
+       }
+}
+
+/*
+ * Print a button
+ */
+void print_button(WINDOW * win, const char *label, int y, int x, int selected)
+{
+       int i, temp;
+
+       wmove(win, y, x);
+       wattrset(win, selected ? dlg.button_active.atr
+                : dlg.button_inactive.atr);
+       waddstr(win, "<");
+       temp = strspn(label, " ");
+       label += temp;
+       wattrset(win, selected ? dlg.button_label_active.atr
+                : dlg.button_label_inactive.atr);
+       for (i = 0; i < temp; i++)
+               waddch(win, ' ');
+       wattrset(win, selected ? dlg.button_key_active.atr
+                : dlg.button_key_inactive.atr);
+       waddch(win, label[0]);
+       wattrset(win, selected ? dlg.button_label_active.atr
+                : dlg.button_label_inactive.atr);
+       waddstr(win, (char *)label + 1);
+       wattrset(win, selected ? dlg.button_active.atr
+                : dlg.button_inactive.atr);
+       waddstr(win, ">");
+       wmove(win, y, x + temp + 1);
+}
+
+/*
+ * Draw a rectangular box with line drawing characters
+ */
+void
+draw_box(WINDOW * win, int y, int x, int height, int width,
+        chtype box, chtype border)
+{
+       int i, j;
+
+       wattrset(win, 0);
+       for (i = 0; i < height; i++) {
+               wmove(win, y + i, x);
+               for (j = 0; j < width; j++)
+                       if (!i && !j)
+                               waddch(win, border | ACS_ULCORNER);
+                       else if (i == height - 1 && !j)
+                               waddch(win, border | ACS_LLCORNER);
+                       else if (!i && j == width - 1)
+                               waddch(win, box | ACS_URCORNER);
+                       else if (i == height - 1 && j == width - 1)
+                               waddch(win, box | ACS_LRCORNER);
+                       else if (!i)
+                               waddch(win, border | ACS_HLINE);
+                       else if (i == height - 1)
+                               waddch(win, box | ACS_HLINE);
+                       else if (!j)
+                               waddch(win, border | ACS_VLINE);
+                       else if (j == width - 1)
+                               waddch(win, box | ACS_VLINE);
+                       else
+                               waddch(win, box | ' ');
+       }
+}
+
+/*
+ * Draw shadows along the right and bottom edge to give a more 3D look
+ * to the boxes
+ */
+void draw_shadow(WINDOW * win, int y, int x, int height, int width)
+{
+       int i;
+
+       if (has_colors()) {     /* Whether terminal supports color? */
+               wattrset(win, dlg.shadow.atr);
+               wmove(win, y + height, x + 2);
+               for (i = 0; i < width; i++)
+                       waddch(win, winch(win) & A_CHARTEXT);
+               for (i = y + 1; i < y + height + 1; i++) {
+                       wmove(win, i, x + width);
+                       waddch(win, winch(win) & A_CHARTEXT);
+                       waddch(win, winch(win) & A_CHARTEXT);
+               }
+               wnoutrefresh(win);
+       }
+}
+
+/*
+ *  Return the position of the first alphabetic character in a string.
+ */
+int first_alpha(const char *string, const char *exempt)
+{
+       int i, in_paren = 0, c;
+
+       for (i = 0; i < strlen(string); i++) {
+               c = tolower(string[i]);
+
+               if (strchr("<[(", c))
+                       ++in_paren;
+               if (strchr(">])", c) && in_paren > 0)
+                       --in_paren;
+
+               if ((!in_paren) && isalpha(c) && strchr(exempt, c) == 0)
+                       return i;
+       }
+
+       return 0;
+}
+
+/*
+ * ncurses uses ESC to detect escaped char sequences. This resutl in
+ * a small timeout before ESC is actually delivered to the application.
+ * lxdialog suggest <ESC> <ESC> which is correctly translated to two
+ * times esc. But then we need to ignore the second esc to avoid stepping
+ * out one menu too much. Filter away all escaped key sequences since
+ * keypad(FALSE) turn off ncurses support for escape sequences - and thats
+ * needed to make notimeout() do as expected.
+ */
+int on_key_esc(WINDOW *win)
+{
+       int key;
+       int key2;
+       int key3;
+
+       nodelay(win, TRUE);
+       keypad(win, FALSE);
+       key = wgetch(win);
+       key2 = wgetch(win);
+       do {
+               key3 = wgetch(win);
+       } while (key3 != ERR);
+       nodelay(win, FALSE);
+       keypad(win, TRUE);
+       if (key == KEY_ESC && key2 == ERR)
+               return KEY_ESC;
+       else if (key != ERR && key != KEY_ESC && key2 == ERR)
+               ungetch(key);
+
+       return -1;
+}
+
+/* redraw screen in new size */
+int on_key_resize(void)
+{
+       dialog_clear();
+       return KEY_RESIZE;
+}
+
+struct dialog_list *item_cur;
+struct dialog_list item_nil;
+struct dialog_list *item_head;
+
+void item_reset(void)
+{
+       struct dialog_list *p, *next;
+
+       for (p = item_head; p; p = next) {
+               next = p->next;
+               free(p);
+       }
+       item_head = NULL;
+       item_cur = &item_nil;
+}
+
+void item_make(const char *fmt, ...)
+{
+       va_list ap;
+       struct dialog_list *p = malloc(sizeof(*p));
+
+       if (item_head)
+               item_cur->next = p;
+       else
+               item_head = p;
+       item_cur = p;
+       memset(p, 0, sizeof(*p));
+
+       va_start(ap, fmt);
+       vsnprintf(item_cur->node.str, sizeof(item_cur->node.str), fmt, ap);
+       va_end(ap);
+}
+
+void item_add_str(const char *fmt, ...)
+{
+       va_list ap;
+       size_t avail;
+
+       avail = sizeof(item_cur->node.str) - strlen(item_cur->node.str);
+
+       va_start(ap, fmt);
+       vsnprintf(item_cur->node.str + strlen(item_cur->node.str),
+                 avail, fmt, ap);
+       item_cur->node.str[sizeof(item_cur->node.str) - 1] = '\0';
+       va_end(ap);
+}
+
+void item_set_tag(char tag)
+{
+       item_cur->node.tag = tag;
+}
+void item_set_data(void *ptr)
+{
+       item_cur->node.data = ptr;
+}
+
+void item_set_selected(int val)
+{
+       item_cur->node.selected = val;
+}
+
+int item_activate_selected(void)
+{
+       item_foreach()
+               if (item_is_selected())
+                       return 1;
+       return 0;
+}
+
+void *item_data(void)
+{
+       return item_cur->node.data;
+}
+
+char item_tag(void)
+{
+       return item_cur->node.tag;
+}
+
+int item_count(void)
+{
+       int n = 0;
+       struct dialog_list *p;
+
+       for (p = item_head; p; p = p->next)
+               n++;
+       return n;
+}
+
+void item_set(int n)
+{
+       int i = 0;
+       item_foreach()
+               if (i++ == n)
+                       return;
+}
+
+int item_n(void)
+{
+       int n = 0;
+       struct dialog_list *p;
+
+       for (p = item_head; p; p = p->next) {
+               if (p == item_cur)
+                       return n;
+               n++;
+       }
+       return 0;
+}
+
+const char *item_str(void)
+{
+       return item_cur->node.str;
+}
+
+int item_is_selected(void)
+{
+       return (item_cur->node.selected != 0);
+}
+
+int item_is_tag(char tag)
+{
+       return (item_cur->node.tag == tag);
+}
diff --git a/xen/tools/kconfig/lxdialog/yesno.c 
b/xen/tools/kconfig/lxdialog/yesno.c
new file mode 100644
index 0000000..676fb2f
--- /dev/null
+++ b/xen/tools/kconfig/lxdialog/yesno.c
@@ -0,0 +1,114 @@
+/*
+ *  yesno.c -- implements the yes/no box
+ *
+ *  ORIGINAL AUTHOR: Savio Lam (lam836@xxxxxxxxxx)
+ *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@xxxxxxx)
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "dialog.h"
+
+/*
+ * Display termination buttons
+ */
+static void print_buttons(WINDOW * dialog, int height, int width, int selected)
+{
+       int x = width / 2 - 10;
+       int y = height - 2;
+
+       print_button(dialog, gettext(" Yes "), y, x, selected == 0);
+       print_button(dialog, gettext("  No  "), y, x + 13, selected == 1);
+
+       wmove(dialog, y, x + 1 + 13 * selected);
+       wrefresh(dialog);
+}
+
+/*
+ * Display a dialog box with two buttons - Yes and No
+ */
+int dialog_yesno(const char *title, const char *prompt, int height, int width)
+{
+       int i, x, y, key = 0, button = 0;
+       WINDOW *dialog;
+
+do_resize:
+       if (getmaxy(stdscr) < (height + YESNO_HEIGTH_MIN))
+               return -ERRDISPLAYTOOSMALL;
+       if (getmaxx(stdscr) < (width + YESNO_WIDTH_MIN))
+               return -ERRDISPLAYTOOSMALL;
+
+       /* center dialog box on screen */
+       x = (getmaxx(stdscr) - width) / 2;
+       y = (getmaxy(stdscr) - height) / 2;
+
+       draw_shadow(stdscr, y, x, height, width);
+
+       dialog = newwin(height, width, y, x);
+       keypad(dialog, TRUE);
+
+       draw_box(dialog, 0, 0, height, width,
+                dlg.dialog.atr, dlg.border.atr);
+       wattrset(dialog, dlg.border.atr);
+       mvwaddch(dialog, height - 3, 0, ACS_LTEE);
+       for (i = 0; i < width - 2; i++)
+               waddch(dialog, ACS_HLINE);
+       wattrset(dialog, dlg.dialog.atr);
+       waddch(dialog, ACS_RTEE);
+
+       print_title(dialog, title, width);
+
+       wattrset(dialog, dlg.dialog.atr);
+       print_autowrap(dialog, prompt, width - 2, 1, 3);
+
+       print_buttons(dialog, height, width, 0);
+
+       while (key != KEY_ESC) {
+               key = wgetch(dialog);
+               switch (key) {
+               case 'Y':
+               case 'y':
+                       delwin(dialog);
+                       return 0;
+               case 'N':
+               case 'n':
+                       delwin(dialog);
+                       return 1;
+
+               case TAB:
+               case KEY_LEFT:
+               case KEY_RIGHT:
+                       button = ((key == KEY_LEFT ? --button : ++button) < 0) 
? 1 : (button > 1 ? 0 : button);
+
+                       print_buttons(dialog, height, width, button);
+                       wrefresh(dialog);
+                       break;
+               case ' ':
+               case '\n':
+                       delwin(dialog);
+                       return button;
+               case KEY_ESC:
+                       key = on_key_esc(dialog);
+                       break;
+               case KEY_RESIZE:
+                       delwin(dialog);
+                       on_key_resize();
+                       goto do_resize;
+               }
+       }
+
+       delwin(dialog);
+       return key;             /* ESC pressed */
+}
diff --git a/xen/tools/kconfig/mconf.c b/xen/tools/kconfig/mconf.c
new file mode 100644
index 0000000..315ce2c
--- /dev/null
+++ b/xen/tools/kconfig/mconf.c
@@ -0,0 +1,1047 @@
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@xxxxxxxxxxxxxx>
+ * Released under the terms of the GNU GPL v2.0.
+ *
+ * Introduced single menu mode (show all sub-menus in one large tree).
+ * 2002-11-06 Petr Baudis <pasky@xxxxxx>
+ *
+ * i18n, 2005, Arnaldo Carvalho de Melo <acme@xxxxxxxxxxxxxxxx>
+ */
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <unistd.h>
+#include <locale.h>
+
+#include "lkc.h"
+#include "lxdialog/dialog.h"
+
+static const char mconf_readme[] = N_(
+"Overview\n"
+"--------\n"
+"This interface lets you select features and parameters for the build.\n"
+"Features can either be built-in, modularized, or ignored. Parameters\n"
+"must be entered in as decimal or hexadecimal numbers or text.\n"
+"\n"
+"Menu items beginning with following braces represent features that\n"
+"  [ ] can be built in or removed\n"
+"  < > can be built in, modularized or removed\n"
+"  { } can be built in or modularized (selected by other feature)\n"
+"  - - are selected by other feature,\n"
+"while *, M or whitespace inside braces means to build in, build as\n"
+"a module or to exclude the feature respectively.\n"
+"\n"
+"To change any of these features, highlight it with the cursor\n"
+"keys and press <Y> to build it in, <M> to make it a module or\n"
+"<N> to remove it.  You may also press the <Space Bar> to cycle\n"
+"through the available options (i.e. Y->N->M->Y).\n"
+"\n"
+"Some additional keyboard hints:\n"
+"\n"
+"Menus\n"
+"----------\n"
+"o  Use the Up/Down arrow keys (cursor keys) to highlight the item you\n"
+"   wish to change or the submenu you wish to select and press <Enter>.\n"
+"   Submenus are designated by \"--->\", empty ones by \"----\".\n"
+"\n"
+"   Shortcut: Press the option's highlighted letter (hotkey).\n"
+"             Pressing a hotkey more than once will sequence\n"
+"             through all visible items which use that hotkey.\n"
+"\n"
+"   You may also use the <PAGE UP> and <PAGE DOWN> keys to scroll\n"
+"   unseen options into view.\n"
+"\n"
+"o  To exit a menu use the cursor keys to highlight the <Exit> button\n"
+"   and press <ENTER>.\n"
+"\n"
+"   Shortcut: Press <ESC><ESC> or <E> or <X> if there is no hotkey\n"
+"             using those letters.  You may press a single <ESC>, but\n"
+"             there is a delayed response which you may find annoying.\n"
+"\n"
+"   Also, the <TAB> and cursor keys will cycle between <Select>,\n"
+"   <Exit>, <Help>, <Save>, and <Load>.\n"
+"\n"
+"o  To get help with an item, use the cursor keys to highlight <Help>\n"
+"   and press <ENTER>.\n"
+"\n"
+"   Shortcut: Press <H> or <?>.\n"
+"\n"
+"o  To toggle the display of hidden options, press <Z>.\n"
+"\n"
+"\n"
+"Radiolists  (Choice lists)\n"
+"-----------\n"
+"o  Use the cursor keys to select the option you wish to set and press\n"
+"   <S> or the <SPACE BAR>.\n"
+"\n"
+"   Shortcut: Press the first letter of the option you wish to set then\n"
+"             press <S> or <SPACE BAR>.\n"
+"\n"
+"o  To see available help for the item, use the cursor keys to highlight\n"
+"   <Help> and Press <ENTER>.\n"
+"\n"
+"   Shortcut: Press <H> or <?>.\n"
+"\n"
+"   Also, the <TAB> and cursor keys will cycle between <Select> and\n"
+"   <Help>\n"
+"\n"
+"\n"
+"Data Entry\n"
+"-----------\n"
+"o  Enter the requested information and press <ENTER>\n"
+"   If you are entering hexadecimal values, it is not necessary to\n"
+"   add the '0x' prefix to the entry.\n"
+"\n"
+"o  For help, use the <TAB> or cursor keys to highlight the help option\n"
+"   and press <ENTER>.  You can try <TAB><H> as well.\n"
+"\n"
+"\n"
+"Text Box    (Help Window)\n"
+"--------\n"
+"o  Use the cursor keys to scroll up/down/left/right.  The VI editor\n"
+"   keys h,j,k,l function here as do <u>, <d>, <SPACE BAR> and <B> for\n"
+"   those who are familiar with less and lynx.\n"
+"\n"
+"o  Press <E>, <X>, <q>, <Enter> or <Esc><Esc> to exit.\n"
+"\n"
+"\n"
+"Alternate Configuration Files\n"
+"-----------------------------\n"
+"Menuconfig supports the use of alternate configuration files for\n"
+"those who, for various reasons, find it necessary to switch\n"
+"between different configurations.\n"
+"\n"
+"The <Save> button will let you save the current configuration to\n"
+"a file of your choosing.  Use the <Load> button to load a previously\n"
+"saved alternate configuration.\n"
+"\n"
+"Even if you don't use alternate configuration files, but you find\n"
+"during a Menuconfig session that you have completely messed up your\n"
+"settings, you may use the <Load> button to restore your previously\n"
+"saved settings from \".config\" without restarting Menuconfig.\n"
+"\n"
+"Other information\n"
+"-----------------\n"
+"If you use Menuconfig in an XTERM window, make sure you have your\n"
+"$TERM variable set to point to an xterm definition which supports\n"
+"color.  Otherwise, Menuconfig will look rather bad.  Menuconfig will\n"
+"not display correctly in an RXVT window because rxvt displays only one\n"
+"intensity of color, bright.\n"
+"\n"
+"Menuconfig will display larger menus on screens or xterms which are\n"
+"set to display more than the standard 25 row by 80 column geometry.\n"
+"In order for this to work, the \"stty size\" command must be able to\n"
+"display the screen's current row and column geometry.  I STRONGLY\n"
+"RECOMMEND that you make sure you do NOT have the shell variables\n"
+"LINES and COLUMNS exported into your environment.  Some distributions\n"
+"export those variables via /etc/profile.  Some ncurses programs can\n"
+"become confused when those variables (LINES & COLUMNS) don't reflect\n"
+"the true screen size.\n"
+"\n"
+"Optional personality available\n"
+"------------------------------\n"
+"If you prefer to have all of the options listed in a single menu,\n"
+"rather than the default multimenu hierarchy, run the menuconfig with\n"
+"MENUCONFIG_MODE environment variable set to single_menu. Example:\n"
+"\n"
+"make MENUCONFIG_MODE=single_menu menuconfig\n"
+"\n"
+"<Enter> will then unroll the appropriate category, or enfold it if it\n"
+"is already unrolled.\n"
+"\n"
+"Note that this mode can eventually be a little more CPU expensive\n"
+"(especially with a larger number of unrolled categories) than the\n"
+"default mode.\n"
+"\n"
+"Different color themes available\n"
+"--------------------------------\n"
+"It is possible to select different color themes using the variable\n"
+"MENUCONFIG_COLOR. To select a theme use:\n"
+"\n"
+"make MENUCONFIG_COLOR=<theme> menuconfig\n"
+"\n"
+"Available themes are\n"
+" mono       => selects colors suitable for monochrome displays\n"
+" blackbg    => selects a color scheme with black background\n"
+" classic    => theme with blue background. The classic look\n"
+" bluetitle  => an LCD friendly version of classic. (default)\n"
+"\n"),
+menu_instructions[] = N_(
+       "Arrow keys navigate the menu.  "
+       "<Enter> selects submenus ---> (or empty submenus ----).  "
+       "Highlighted letters are hotkeys.  "
+       "Pressing <Y> includes, <N> excludes, <M> modularizes features.  "
+       "Press <Esc><Esc> to exit, <?> for Help, </> for Search.  "
+       "Legend: [*] built-in  [ ] excluded  <M> module  < > module capable"),
+radiolist_instructions[] = N_(
+       "Use the arrow keys to navigate this window or "
+       "press the hotkey of the item you wish to select "
+       "followed by the <SPACE BAR>. "
+       "Press <?> for additional information about this option."),
+inputbox_instructions_int[] = N_(
+       "Please enter a decimal value. "
+       "Fractions will not be accepted.  "
+       "Use the <TAB> key to move from the input field to the buttons below 
it."),
+inputbox_instructions_hex[] = N_(
+       "Please enter a hexadecimal value. "
+       "Use the <TAB> key to move from the input field to the buttons below 
it."),
+inputbox_instructions_string[] = N_(
+       "Please enter a string value. "
+       "Use the <TAB> key to move from the input field to the buttons below 
it."),
+setmod_text[] = N_(
+       "This feature depends on another which has been configured as a 
module.\n"
+       "As a result, this feature will be built as a module."),
+load_config_text[] = N_(
+       "Enter the name of the configuration file you wish to load.  "
+       "Accept the name shown to restore the configuration you "
+       "last retrieved.  Leave blank to abort."),
+load_config_help[] = N_(
+       "\n"
+       "For various reasons, one may wish to keep several different\n"
+       "configurations available on a single machine.\n"
+       "\n"
+       "If you have saved a previous configuration in a file other than the\n"
+       "default one, entering its name here will allow you to modify that\n"
+       "configuration.\n"
+       "\n"
+       "If you are uncertain, then you have probably never used alternate\n"
+       "configuration files. You should therefore leave this blank to 
abort.\n"),
+save_config_text[] = N_(
+       "Enter a filename to which this configuration should be saved "
+       "as an alternate.  Leave blank to abort."),
+save_config_help[] = N_(
+       "\n"
+       "For various reasons, one may wish to keep different configurations\n"
+       "available on a single machine.\n"
+       "\n"
+       "Entering a file name here will allow you to later retrieve, modify\n"
+       "and use the current configuration as an alternate to whatever\n"
+       "configuration options you have selected at that time.\n"
+       "\n"
+       "If you are uncertain what all this means then you should probably\n"
+       "leave this blank.\n"),
+search_help[] = N_(
+       "\n"
+       "Search for symbols and display their relations.\n"
+       "Regular expressions are allowed.\n"
+       "Example: search for \"^FOO\"\n"
+       "Result:\n"
+       "-----------------------------------------------------------------\n"
+       "Symbol: FOO [=m]\n"
+       "Type  : tristate\n"
+       "Prompt: Foo bus is used to drive the bar HW\n"
+       "  Location:\n"
+       "    -> Bus options (PCI, PCMCIA, EISA, ISA)\n"
+       "      -> PCI support (PCI [=y])\n"
+       "(1)     -> PCI access mode (<choice> [=y])\n"
+       "  Defined at drivers/pci/Kconfig:47\n"
+       "  Depends on: X86_LOCAL_APIC && X86_IO_APIC || IA64\n"
+       "  Selects: LIBCRC32\n"
+       "  Selected by: BAR [=n]\n"
+       "-----------------------------------------------------------------\n"
+       "o The line 'Type:' shows the type of the configuration option for\n"
+       "  this symbol (boolean, tristate, string, ...)\n"
+       "o The line 'Prompt:' shows the text used in the menu structure for\n"
+       "  this symbol\n"
+       "o The 'Defined at' line tells at what file / line number the symbol\n"
+       "  is defined\n"
+       "o The 'Depends on:' line tells what symbols need to be defined for\n"
+       "  this symbol to be visible in the menu (selectable)\n"
+       "o The 'Location:' lines tells where in the menu structure this 
symbol\n"
+       "  is located\n"
+       "    A location followed by a [=y] indicates that this is a\n"
+       "    selectable menu item - and the current value is displayed inside\n"
+       "    brackets.\n"
+       "    Press the key in the (#) prefix to jump directly to that\n"
+       "    location. You will be returned to the current search results\n"
+       "    after exiting this new menu.\n"
+       "o The 'Selects:' line tells what symbols will be automatically\n"
+       "  selected if this symbol is selected (y or m)\n"
+       "o The 'Selected by' line tells what symbol has selected this symbol\n"
+       "\n"
+       "Only relevant lines are shown.\n"
+       "\n\n"
+       "Search examples:\n"
+       "Examples: USB  => find all symbols containing USB\n"
+       "          ^USB => find all symbols starting with USB\n"
+       "          USB$ => find all symbols ending with USB\n"
+       "\n");
+
+static int indent;
+static struct menu *current_menu;
+static int child_count;
+static int single_menu_mode;
+static int show_all_options;
+static int save_and_exit;
+static int silent;
+
+static void conf(struct menu *menu, struct menu *active_menu);
+static void conf_choice(struct menu *menu);
+static void conf_string(struct menu *menu);
+static void conf_load(void);
+static void conf_save(void);
+static int show_textbox_ext(const char *title, char *text, int r, int c,
+                           int *keys, int *vscroll, int *hscroll,
+                           update_text_fn update_text, void *data);
+static void show_textbox(const char *title, const char *text, int r, int c);
+static void show_helptext(const char *title, const char *text);
+static void show_help(struct menu *menu);
+
+static char filename[PATH_MAX+1];
+static void set_config_filename(const char *config_filename)
+{
+       static char menu_backtitle[PATH_MAX+128];
+       int size;
+
+       size = snprintf(menu_backtitle, sizeof(menu_backtitle),
+                       "%s - %s", config_filename, rootmenu.prompt->text);
+       if (size >= sizeof(menu_backtitle))
+               menu_backtitle[sizeof(menu_backtitle)-1] = '\0';
+       set_dialog_backtitle(menu_backtitle);
+
+       size = snprintf(filename, sizeof(filename), "%s", config_filename);
+       if (size >= sizeof(filename))
+               filename[sizeof(filename)-1] = '\0';
+}
+
+struct subtitle_part {
+       struct list_head entries;
+       const char *text;
+};
+static LIST_HEAD(trail);
+
+static struct subtitle_list *subtitles;
+static void set_subtitle(void)
+{
+       struct subtitle_part *sp;
+       struct subtitle_list *pos, *tmp;
+
+       for (pos = subtitles; pos != NULL; pos = tmp) {
+               tmp = pos->next;
+               free(pos);
+       }
+
+       subtitles = NULL;
+       list_for_each_entry(sp, &trail, entries) {
+               if (sp->text) {
+                       if (pos) {
+                               pos->next = xcalloc(1, sizeof(*pos));
+                               pos = pos->next;
+                       } else {
+                               subtitles = pos = xcalloc(1, sizeof(*pos));
+                       }
+                       pos->text = sp->text;
+               }
+       }
+
+       set_dialog_subtitles(subtitles);
+}
+
+static void reset_subtitle(void)
+{
+       struct subtitle_list *pos, *tmp;
+
+       for (pos = subtitles; pos != NULL; pos = tmp) {
+               tmp = pos->next;
+               free(pos);
+       }
+       subtitles = NULL;
+       set_dialog_subtitles(subtitles);
+}
+
+struct search_data {
+       struct list_head *head;
+       struct menu **targets;
+       int *keys;
+};
+
+static void update_text(char *buf, size_t start, size_t end, void *_data)
+{
+       struct search_data *data = _data;
+       struct jump_key *pos;
+       int k = 0;
+
+       list_for_each_entry(pos, data->head, entries) {
+               if (pos->offset >= start && pos->offset < end) {
+                       char header[4];
+
+                       if (k < JUMP_NB) {
+                               int key = '0' + (pos->index % JUMP_NB) + 1;
+
+                               sprintf(header, "(%c)", key);
+                               data->keys[k] = key;
+                               data->targets[k] = pos->target;
+                               k++;
+                       } else {
+                               sprintf(header, "   ");
+                       }
+
+                       memcpy(buf + pos->offset, header, sizeof(header) - 1);
+               }
+       }
+       data->keys[k] = 0;
+}
+
+static void search_conf(void)
+{
+       struct symbol **sym_arr;
+       struct gstr res;
+       struct gstr title;
+       char *dialog_input;
+       int dres, vscroll = 0, hscroll = 0;
+       bool again;
+       struct gstr sttext;
+       struct subtitle_part stpart;
+
+       title = str_new();
+       str_printf( &title, _("Enter (sub)string or regexp to search for "
+                             "(with or without \"%s\")"), CONFIG_);
+
+again:
+       dialog_clear();
+       dres = dialog_inputbox(_("Search Configuration Parameter"),
+                             str_get(&title),
+                             10, 75, "");
+       switch (dres) {
+       case 0:
+               break;
+       case 1:
+               show_helptext(_("Search Configuration"), search_help);
+               goto again;
+       default:
+               str_free(&title);
+               return;
+       }
+
+       /* strip the prefix if necessary */
+       dialog_input = dialog_input_result;
+       if (strncasecmp(dialog_input_result, CONFIG_, strlen(CONFIG_)) == 0)
+               dialog_input += strlen(CONFIG_);
+
+       sttext = str_new();
+       str_printf(&sttext, "Search (%s)", dialog_input_result);
+       stpart.text = str_get(&sttext);
+       list_add_tail(&stpart.entries, &trail);
+
+       sym_arr = sym_re_search(dialog_input);
+       do {
+               LIST_HEAD(head);
+               struct menu *targets[JUMP_NB];
+               int keys[JUMP_NB + 1], i;
+               struct search_data data = {
+                       .head = &head,
+                       .targets = targets,
+                       .keys = keys,
+               };
+               struct jump_key *pos, *tmp;
+
+               res = get_relations_str(sym_arr, &head);
+               set_subtitle();
+               dres = show_textbox_ext(_("Search Results"), (char *)
+                                       str_get(&res), 0, 0, keys, &vscroll,
+                                       &hscroll, &update_text, (void *)
+                                       &data);
+               again = false;
+               for (i = 0; i < JUMP_NB && keys[i]; i++)
+                       if (dres == keys[i]) {
+                               conf(targets[i]->parent, targets[i]);
+                               again = true;
+                       }
+               str_free(&res);
+               list_for_each_entry_safe(pos, tmp, &head, entries)
+                       free(pos);
+       } while (again);
+       free(sym_arr);
+       str_free(&title);
+       list_del(trail.prev);
+       str_free(&sttext);
+}
+
+static void build_conf(struct menu *menu)
+{
+       struct symbol *sym;
+       struct property *prop;
+       struct menu *child;
+       int type, tmp, doint = 2;
+       tristate val;
+       char ch;
+       bool visible;
+
+       /*
+        * note: menu_is_visible() has side effect that it will
+        * recalc the value of the symbol.
+        */
+       visible = menu_is_visible(menu);
+       if (show_all_options && !menu_has_prompt(menu))
+               return;
+       else if (!show_all_options && !visible)
+               return;
+
+       sym = menu->sym;
+       prop = menu->prompt;
+       if (!sym) {
+               if (prop && menu != current_menu) {
+                       const char *prompt = menu_get_prompt(menu);
+                       switch (prop->type) {
+                       case P_MENU:
+                               child_count++;
+                               prompt = _(prompt);
+                               if (single_menu_mode) {
+                                       item_make("%s%*c%s",
+                                                 menu->data ? "-->" : "++>",
+                                                 indent + 1, ' ', prompt);
+                               } else
+                                       item_make("   %*c%s  %s",
+                                                 indent + 1, ' ', prompt,
+                                                 menu_is_empty(menu) ? "----" 
: "--->");
+                               item_set_tag('m');
+                               item_set_data(menu);
+                               if (single_menu_mode && menu->data)
+                                       goto conf_childs;
+                               return;
+                       case P_COMMENT:
+                               if (prompt) {
+                                       child_count++;
+                                       item_make("   %*c*** %s ***", indent + 
1, ' ', _(prompt));
+                                       item_set_tag(':');
+                                       item_set_data(menu);
+                               }
+                               break;
+                       default:
+                               if (prompt) {
+                                       child_count++;
+                                       item_make("---%*c%s", indent + 1, ' ', 
_(prompt));
+                                       item_set_tag(':');
+                                       item_set_data(menu);
+                               }
+                       }
+               } else
+                       doint = 0;
+               goto conf_childs;
+       }
+
+       type = sym_get_type(sym);
+       if (sym_is_choice(sym)) {
+               struct symbol *def_sym = sym_get_choice_value(sym);
+               struct menu *def_menu = NULL;
+
+               child_count++;
+               for (child = menu->list; child; child = child->next) {
+                       if (menu_is_visible(child) && child->sym == def_sym)
+                               def_menu = child;
+               }
+
+               val = sym_get_tristate_value(sym);
+               if (sym_is_changable(sym)) {
+                       switch (type) {
+                       case S_BOOLEAN:
+                               item_make("[%c]", val == no ? ' ' : '*');
+                               break;
+                       case S_TRISTATE:
+                               switch (val) {
+                               case yes: ch = '*'; break;
+                               case mod: ch = 'M'; break;
+                               default:  ch = ' '; break;
+                               }
+                               item_make("<%c>", ch);
+                               break;
+                       }
+                       item_set_tag('t');
+                       item_set_data(menu);
+               } else {
+                       item_make("   ");
+                       item_set_tag(def_menu ? 't' : ':');
+                       item_set_data(menu);
+               }
+
+               item_add_str("%*c%s", indent + 1, ' ', 
_(menu_get_prompt(menu)));
+               if (val == yes) {
+                       if (def_menu) {
+                               item_add_str(" (%s)", 
_(menu_get_prompt(def_menu)));
+                               item_add_str("  --->");
+                               if (def_menu->list) {
+                                       indent += 2;
+                                       build_conf(def_menu);
+                                       indent -= 2;
+                               }
+                       }
+                       return;
+               }
+       } else {
+               if (menu == current_menu) {
+                       item_make("---%*c%s", indent + 1, ' ', 
_(menu_get_prompt(menu)));
+                       item_set_tag(':');
+                       item_set_data(menu);
+                       goto conf_childs;
+               }
+               child_count++;
+               val = sym_get_tristate_value(sym);
+               if (sym_is_choice_value(sym) && val == yes) {
+                       item_make("   ");
+                       item_set_tag(':');
+                       item_set_data(menu);
+               } else {
+                       switch (type) {
+                       case S_BOOLEAN:
+                               if (sym_is_changable(sym))
+                                       item_make("[%c]", val == no ? ' ' : 
'*');
+                               else
+                                       item_make("-%c-", val == no ? ' ' : 
'*');
+                               item_set_tag('t');
+                               item_set_data(menu);
+                               break;
+                       case S_TRISTATE:
+                               switch (val) {
+                               case yes: ch = '*'; break;
+                               case mod: ch = 'M'; break;
+                               default:  ch = ' '; break;
+                               }
+                               if (sym_is_changable(sym)) {
+                                       if (sym->rev_dep.tri == mod)
+                                               item_make("{%c}", ch);
+                                       else
+                                               item_make("<%c>", ch);
+                               } else
+                                       item_make("-%c-", ch);
+                               item_set_tag('t');
+                               item_set_data(menu);
+                               break;
+                       default:
+                               tmp = 2 + strlen(sym_get_string_value(sym)); /* 
() = 2 */
+                               item_make("(%s)", sym_get_string_value(sym));
+                               tmp = indent - tmp + 4;
+                               if (tmp < 0)
+                                       tmp = 0;
+                               item_add_str("%*c%s%s", tmp, ' ', 
_(menu_get_prompt(menu)),
+                                            (sym_has_value(sym) || 
!sym_is_changable(sym)) ?
+                                            "" : _(" (NEW)"));
+                               item_set_tag('s');
+                               item_set_data(menu);
+                               goto conf_childs;
+                       }
+               }
+               item_add_str("%*c%s%s", indent + 1, ' ', 
_(menu_get_prompt(menu)),
+                         (sym_has_value(sym) || !sym_is_changable(sym)) ?
+                         "" : _(" (NEW)"));
+               if (menu->prompt->type == P_MENU) {
+                       item_add_str("  %s", menu_is_empty(menu) ? "----" : 
"--->");
+                       return;
+               }
+       }
+
+conf_childs:
+       indent += doint;
+       for (child = menu->list; child; child = child->next)
+               build_conf(child);
+       indent -= doint;
+}
+
+static void conf(struct menu *menu, struct menu *active_menu)
+{
+       struct menu *submenu;
+       const char *prompt = menu_get_prompt(menu);
+       struct subtitle_part stpart;
+       struct symbol *sym;
+       int res;
+       int s_scroll = 0;
+
+       if (menu != &rootmenu)
+               stpart.text = menu_get_prompt(menu);
+       else
+               stpart.text = NULL;
+       list_add_tail(&stpart.entries, &trail);
+
+       while (1) {
+               item_reset();
+               current_menu = menu;
+               build_conf(menu);
+               if (!child_count)
+                       break;
+               set_subtitle();
+               dialog_clear();
+               res = dialog_menu(prompt ? _(prompt) : _("Main Menu"),
+                                 _(menu_instructions),
+                                 active_menu, &s_scroll);
+               if (res == 1 || res == KEY_ESC || res == -ERRDISPLAYTOOSMALL)
+                       break;
+               if (item_count() != 0) {
+                       if (!item_activate_selected())
+                               continue;
+                       if (!item_tag())
+                               continue;
+               }
+               submenu = item_data();
+               active_menu = item_data();
+               if (submenu)
+                       sym = submenu->sym;
+               else
+                       sym = NULL;
+
+               switch (res) {
+               case 0:
+                       switch (item_tag()) {
+                       case 'm':
+                               if (single_menu_mode)
+                                       submenu->data = (void *) (long) 
!submenu->data;
+                               else
+                                       conf(submenu, NULL);
+                               break;
+                       case 't':
+                               if (sym_is_choice(sym) && 
sym_get_tristate_value(sym) == yes)
+                                       conf_choice(submenu);
+                               else if (submenu->prompt->type == P_MENU)
+                                       conf(submenu, NULL);
+                               break;
+                       case 's':
+                               conf_string(submenu);
+                               break;
+                       }
+                       break;
+               case 2:
+                       if (sym)
+                               show_help(submenu);
+                       else {
+                               reset_subtitle();
+                               show_helptext(_("README"), _(mconf_readme));
+                       }
+                       break;
+               case 3:
+                       reset_subtitle();
+                       conf_save();
+                       break;
+               case 4:
+                       reset_subtitle();
+                       conf_load();
+                       break;
+               case 5:
+                       if (item_is_tag('t')) {
+                               if (sym_set_tristate_value(sym, yes))
+                                       break;
+                               if (sym_set_tristate_value(sym, mod))
+                                       show_textbox(NULL, setmod_text, 6, 74);
+                       }
+                       break;
+               case 6:
+                       if (item_is_tag('t'))
+                               sym_set_tristate_value(sym, no);
+                       break;
+               case 7:
+                       if (item_is_tag('t'))
+                               sym_set_tristate_value(sym, mod);
+                       break;
+               case 8:
+                       if (item_is_tag('t'))
+                               sym_toggle_tristate_value(sym);
+                       else if (item_is_tag('m'))
+                               conf(submenu, NULL);
+                       break;
+               case 9:
+                       search_conf();
+                       break;
+               case 10:
+                       show_all_options = !show_all_options;
+                       break;
+               }
+       }
+
+       list_del(trail.prev);
+}
+
+static int show_textbox_ext(const char *title, char *text, int r, int c, int
+                           *keys, int *vscroll, int *hscroll, update_text_fn
+                           update_text, void *data)
+{
+       dialog_clear();
+       return dialog_textbox(title, text, r, c, keys, vscroll, hscroll,
+                             update_text, data);
+}
+
+static void show_textbox(const char *title, const char *text, int r, int c)
+{
+       show_textbox_ext(title, (char *) text, r, c, (int []) {0}, NULL, NULL,
+                        NULL, NULL);
+}
+
+static void show_helptext(const char *title, const char *text)
+{
+       show_textbox(title, text, 0, 0);
+}
+
+static void conf_message_callback(const char *fmt, va_list ap)
+{
+       char buf[PATH_MAX+1];
+
+       vsnprintf(buf, sizeof(buf), fmt, ap);
+       if (save_and_exit) {
+               if (!silent)
+                       printf("%s", buf);
+       } else {
+               show_textbox(NULL, buf, 6, 60);
+       }
+}
+
+static void show_help(struct menu *menu)
+{
+       struct gstr help = str_new();
+
+       help.max_width = getmaxx(stdscr) - 10;
+       menu_get_ext_help(menu, &help);
+
+       show_helptext(_(menu_get_prompt(menu)), str_get(&help));
+       str_free(&help);
+}
+
+static void conf_choice(struct menu *menu)
+{
+       const char *prompt = _(menu_get_prompt(menu));
+       struct menu *child;
+       struct symbol *active;
+
+       active = sym_get_choice_value(menu->sym);
+       while (1) {
+               int res;
+               int selected;
+               item_reset();
+
+               current_menu = menu;
+               for (child = menu->list; child; child = child->next) {
+                       if (!menu_is_visible(child))
+                               continue;
+                       if (child->sym)
+                               item_make("%s", _(menu_get_prompt(child)));
+                       else {
+                               item_make("*** %s ***", 
_(menu_get_prompt(child)));
+                               item_set_tag(':');
+                       }
+                       item_set_data(child);
+                       if (child->sym == active)
+                               item_set_selected(1);
+                       if (child->sym == sym_get_choice_value(menu->sym))
+                               item_set_tag('X');
+               }
+               dialog_clear();
+               res = dialog_checklist(prompt ? _(prompt) : _("Main Menu"),
+                                       _(radiolist_instructions),
+                                       MENUBOX_HEIGTH_MIN,
+                                       MENUBOX_WIDTH_MIN,
+                                       CHECKLIST_HEIGTH_MIN);
+               selected = item_activate_selected();
+               switch (res) {
+               case 0:
+                       if (selected) {
+                               child = item_data();
+                               if (!child->sym)
+                                       break;
+
+                               sym_set_tristate_value(child->sym, yes);
+                       }
+                       return;
+               case 1:
+                       if (selected) {
+                               child = item_data();
+                               show_help(child);
+                               active = child->sym;
+                       } else
+                               show_help(menu);
+                       break;
+               case KEY_ESC:
+                       return;
+               case -ERRDISPLAYTOOSMALL:
+                       return;
+               }
+       }
+}
+
+static void conf_string(struct menu *menu)
+{
+       const char *prompt = menu_get_prompt(menu);
+
+       while (1) {
+               int res;
+               const char *heading;
+
+               switch (sym_get_type(menu->sym)) {
+               case S_INT:
+                       heading = _(inputbox_instructions_int);
+                       break;
+               case S_HEX:
+                       heading = _(inputbox_instructions_hex);
+                       break;
+               case S_STRING:
+                       heading = _(inputbox_instructions_string);
+                       break;
+               default:
+                       heading = _("Internal mconf error!");
+               }
+               dialog_clear();
+               res = dialog_inputbox(prompt ? _(prompt) : _("Main Menu"),
+                                     heading, 10, 75,
+                                     sym_get_string_value(menu->sym));
+               switch (res) {
+               case 0:
+                       if (sym_set_string_value(menu->sym, 
dialog_input_result))
+                               return;
+                       show_textbox(NULL, _("You have made an invalid 
entry."), 5, 43);
+                       break;
+               case 1:
+                       show_help(menu);
+                       break;
+               case KEY_ESC:
+                       return;
+               }
+       }
+}
+
+static void conf_load(void)
+{
+
+       while (1) {
+               int res;
+               dialog_clear();
+               res = dialog_inputbox(NULL, load_config_text,
+                                     11, 55, filename);
+               switch(res) {
+               case 0:
+                       if (!dialog_input_result[0])
+                               return;
+                       if (!conf_read(dialog_input_result)) {
+                               set_config_filename(dialog_input_result);
+                               sym_set_change_count(1);
+                               return;
+                       }
+                       show_textbox(NULL, _("File does not exist!"), 5, 38);
+                       break;
+               case 1:
+                       show_helptext(_("Load Alternate Configuration"), 
load_config_help);
+                       break;
+               case KEY_ESC:
+                       return;
+               }
+       }
+}
+
+static void conf_save(void)
+{
+       while (1) {
+               int res;
+               dialog_clear();
+               res = dialog_inputbox(NULL, save_config_text,
+                                     11, 55, filename);
+               switch(res) {
+               case 0:
+                       if (!dialog_input_result[0])
+                               return;
+                       if (!conf_write(dialog_input_result)) {
+                               set_config_filename(dialog_input_result);
+                               return;
+                       }
+                       show_textbox(NULL, _("Can't create file!  Probably a 
nonexistent directory."), 5, 60);
+                       break;
+               case 1:
+                       show_helptext(_("Save Alternate Configuration"), 
save_config_help);
+                       break;
+               case KEY_ESC:
+                       return;
+               }
+       }
+}
+
+static int handle_exit(void)
+{
+       int res;
+
+       save_and_exit = 1;
+       reset_subtitle();
+       dialog_clear();
+       if (conf_get_changed())
+               res = dialog_yesno(NULL,
+                                  _("Do you wish to save your new 
configuration?\n"
+                                    "(Press <ESC><ESC> to continue kernel 
configuration.)"),
+                                  6, 60);
+       else
+               res = -1;
+
+       end_dialog(saved_x, saved_y);
+
+       switch (res) {
+       case 0:
+               if (conf_write(filename)) {
+                       fprintf(stderr, _("\n\n"
+                                         "Error while writing of the 
configuration.\n"
+                                         "Your configuration changes were NOT 
saved."
+                                         "\n\n"));
+                       return 1;
+               }
+               /* fall through */
+       case -1:
+               if (!silent)
+                       printf(_("\n\n"
+                                "*** End of the configuration.\n"
+                                "*** Execute 'make' to start the build or try 
'make help'."
+                                "\n\n"));
+               res = 0;
+               break;
+       default:
+               if (!silent)
+                       fprintf(stderr, _("\n\n"
+                                         "Your configuration changes were NOT 
saved."
+                                         "\n\n"));
+               if (res != KEY_ESC)
+                       res = 0;
+       }
+
+       return res;
+}
+
+static void sig_handler(int signo)
+{
+       exit(handle_exit());
+}
+
+int main(int ac, char **av)
+{
+       char *mode;
+       int res;
+
+       setlocale(LC_ALL, "");
+       bindtextdomain(PACKAGE, LOCALEDIR);
+       textdomain(PACKAGE);
+
+       signal(SIGINT, sig_handler);
+
+       if (ac > 1 && strcmp(av[1], "-s") == 0) {
+               silent = 1;
+               /* Silence conf_read() until the real callback is set up */
+               conf_set_message_callback(NULL);
+               av++;
+       }
+       conf_parse(av[1]);
+       conf_read(NULL);
+
+       mode = getenv("MENUCONFIG_MODE");
+       if (mode) {
+               if (!strcasecmp(mode, "single_menu"))
+                       single_menu_mode = 1;
+       }
+
+       if (init_dialog(NULL)) {
+               fprintf(stderr, N_("Your display is too small to run 
Menuconfig!\n"));
+               fprintf(stderr, N_("It must be at least 19 lines by 80 
columns.\n"));
+               return 1;
+       }
+
+       set_config_filename(conf_get_configname());
+       conf_set_message_callback(conf_message_callback);
+       do {
+               conf(&rootmenu, NULL);
+               res = handle_exit();
+       } while (res == KEY_ESC);
+
+       return res;
+}
diff --git a/xen/tools/kconfig/menu.c b/xen/tools/kconfig/menu.c
new file mode 100644
index 0000000..b05cc3d
--- /dev/null
+++ b/xen/tools/kconfig/menu.c
@@ -0,0 +1,697 @@
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@xxxxxxxxxxxxxx>
+ * Released under the terms of the GNU GPL v2.0.
+ */
+
+#include <ctype.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lkc.h"
+
+static const char nohelp_text[] = "There is no help available for this 
option.";
+
+struct menu rootmenu;
+static struct menu **last_entry_ptr;
+
+struct file *file_list;
+struct file *current_file;
+
+void menu_warn(struct menu *menu, const char *fmt, ...)
+{
+       va_list ap;
+       va_start(ap, fmt);
+       fprintf(stderr, "%s:%d:warning: ", menu->file->name, menu->lineno);
+       vfprintf(stderr, fmt, ap);
+       fprintf(stderr, "\n");
+       va_end(ap);
+}
+
+static void prop_warn(struct property *prop, const char *fmt, ...)
+{
+       va_list ap;
+       va_start(ap, fmt);
+       fprintf(stderr, "%s:%d:warning: ", prop->file->name, prop->lineno);
+       vfprintf(stderr, fmt, ap);
+       fprintf(stderr, "\n");
+       va_end(ap);
+}
+
+void _menu_init(void)
+{
+       current_entry = current_menu = &rootmenu;
+       last_entry_ptr = &rootmenu.list;
+}
+
+void menu_add_entry(struct symbol *sym)
+{
+       struct menu *menu;
+
+       menu = xmalloc(sizeof(*menu));
+       memset(menu, 0, sizeof(*menu));
+       menu->sym = sym;
+       menu->parent = current_menu;
+       menu->file = current_file;
+       menu->lineno = zconf_lineno();
+
+       *last_entry_ptr = menu;
+       last_entry_ptr = &menu->next;
+       current_entry = menu;
+       if (sym)
+               menu_add_symbol(P_SYMBOL, sym, NULL);
+}
+
+void menu_end_entry(void)
+{
+}
+
+struct menu *menu_add_menu(void)
+{
+       menu_end_entry();
+       last_entry_ptr = &current_entry->list;
+       return current_menu = current_entry;
+}
+
+void menu_end_menu(void)
+{
+       last_entry_ptr = &current_menu->next;
+       current_menu = current_menu->parent;
+}
+
+static struct expr *menu_check_dep(struct expr *e)
+{
+       if (!e)
+               return e;
+
+       switch (e->type) {
+       case E_NOT:
+               e->left.expr = menu_check_dep(e->left.expr);
+               break;
+       case E_OR:
+       case E_AND:
+               e->left.expr = menu_check_dep(e->left.expr);
+               e->right.expr = menu_check_dep(e->right.expr);
+               break;
+       case E_SYMBOL:
+               /* change 'm' into 'm' && MODULES */
+               if (e->left.sym == &symbol_mod)
+                       return expr_alloc_and(e, 
expr_alloc_symbol(modules_sym));
+               break;
+       default:
+               break;
+       }
+       return e;
+}
+
+void menu_add_dep(struct expr *dep)
+{
+       current_entry->dep = expr_alloc_and(current_entry->dep, 
menu_check_dep(dep));
+}
+
+void menu_set_type(int type)
+{
+       struct symbol *sym = current_entry->sym;
+
+       if (sym->type == type)
+               return;
+       if (sym->type == S_UNKNOWN) {
+               sym->type = type;
+               return;
+       }
+       menu_warn(current_entry,
+               "ignoring type redefinition of '%s' from '%s' to '%s'",
+               sym->name ? sym->name : "<choice>",
+               sym_type_name(sym->type), sym_type_name(type));
+}
+
+static struct property *menu_add_prop(enum prop_type type, char *prompt, 
struct expr *expr, struct expr *dep)
+{
+       struct property *prop = prop_alloc(type, current_entry->sym);
+
+       prop->menu = current_entry;
+       prop->expr = expr;
+       prop->visible.expr = menu_check_dep(dep);
+
+       if (prompt) {
+               if (isspace(*prompt)) {
+                       prop_warn(prop, "leading whitespace ignored");
+                       while (isspace(*prompt))
+                               prompt++;
+               }
+               if (current_entry->prompt && current_entry != &rootmenu)
+                       prop_warn(prop, "prompt redefined");
+
+               /* Apply all upper menus' visibilities to actual prompts. */
+               if(type == P_PROMPT) {
+                       struct menu *menu = current_entry;
+
+                       while ((menu = menu->parent) != NULL) {
+                               struct expr *dup_expr;
+
+                               if (!menu->visibility)
+                                       continue;
+                               /*
+                                * Do not add a reference to the
+                                * menu's visibility expression but
+                                * use a copy of it.  Otherwise the
+                                * expression reduction functions
+                                * will modify expressions that have
+                                * multiple references which can
+                                * cause unwanted side effects.
+                                */
+                               dup_expr = expr_copy(menu->visibility);
+
+                               prop->visible.expr
+                                       = expr_alloc_and(prop->visible.expr,
+                                                        dup_expr);
+                       }
+               }
+
+               current_entry->prompt = prop;
+       }
+       prop->text = prompt;
+
+       return prop;
+}
+
+struct property *menu_add_prompt(enum prop_type type, char *prompt, struct 
expr *dep)
+{
+       return menu_add_prop(type, prompt, NULL, dep);
+}
+
+void menu_add_visibility(struct expr *expr)
+{
+       current_entry->visibility = expr_alloc_and(current_entry->visibility,
+           expr);
+}
+
+void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
+{
+       menu_add_prop(type, NULL, expr, dep);
+}
+
+void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
+{
+       menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
+}
+
+void menu_add_option(int token, char *arg)
+{
+       switch (token) {
+       case T_OPT_MODULES:
+               if (modules_sym)
+                       zconf_error("symbol '%s' redefines option 'modules'"
+                                   " already defined by symbol '%s'",
+                                   current_entry->sym->name,
+                                   modules_sym->name
+                                   );
+               modules_sym = current_entry->sym;
+               break;
+       case T_OPT_DEFCONFIG_LIST:
+               if (!sym_defconfig_list)
+                       sym_defconfig_list = current_entry->sym;
+               else if (sym_defconfig_list != current_entry->sym)
+                       zconf_error("trying to redefine defconfig symbol");
+               break;
+       case T_OPT_ENV:
+               prop_add_env(arg);
+               break;
+       case T_OPT_ALLNOCONFIG_Y:
+               current_entry->sym->flags |= SYMBOL_ALLNOCONFIG_Y;
+               break;
+       }
+}
+
+static int menu_validate_number(struct symbol *sym, struct symbol *sym2)
+{
+       return sym2->type == S_INT || sym2->type == S_HEX ||
+              (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
+}
+
+static void sym_check_prop(struct symbol *sym)
+{
+       struct property *prop;
+       struct symbol *sym2;
+       for (prop = sym->prop; prop; prop = prop->next) {
+               switch (prop->type) {
+               case P_DEFAULT:
+                       if ((sym->type == S_STRING || sym->type == S_INT || 
sym->type == S_HEX) &&
+                           prop->expr->type != E_SYMBOL)
+                               prop_warn(prop,
+                                   "default for config symbol '%s'"
+                                   " must be a single symbol", sym->name);
+                       if (prop->expr->type != E_SYMBOL)
+                               break;
+                       sym2 = prop_get_symbol(prop);
+                       if (sym->type == S_HEX || sym->type == S_INT) {
+                               if (!menu_validate_number(sym, sym2))
+                                       prop_warn(prop,
+                                           "'%s': number is invalid",
+                                           sym->name);
+                       }
+                       break;
+               case P_SELECT:
+                       sym2 = prop_get_symbol(prop);
+                       if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
+                               prop_warn(prop,
+                                   "config symbol '%s' uses select, but is "
+                                   "not boolean or tristate", sym->name);
+                       else if (sym2->type != S_UNKNOWN &&
+                                sym2->type != S_BOOLEAN &&
+                                sym2->type != S_TRISTATE)
+                               prop_warn(prop,
+                                   "'%s' has wrong type. 'select' only "
+                                   "accept arguments of boolean and "
+                                   "tristate type", sym2->name);
+                       break;
+               case P_RANGE:
+                       if (sym->type != S_INT && sym->type != S_HEX)
+                               prop_warn(prop, "range is only allowed "
+                                               "for int or hex symbols");
+                       if (!menu_validate_number(sym, prop->expr->left.sym) ||
+                           !menu_validate_number(sym, prop->expr->right.sym))
+                               prop_warn(prop, "range is invalid");
+                       break;
+               default:
+                       ;
+               }
+       }
+}
+
+void menu_finalize(struct menu *parent)
+{
+       struct menu *menu, *last_menu;
+       struct symbol *sym;
+       struct property *prop;
+       struct expr *parentdep, *basedep, *dep, *dep2, **ep;
+
+       sym = parent->sym;
+       if (parent->list) {
+               if (sym && sym_is_choice(sym)) {
+                       if (sym->type == S_UNKNOWN) {
+                               /* find the first choice value to find out 
choice type */
+                               current_entry = parent;
+                               for (menu = parent->list; menu; menu = 
menu->next) {
+                                       if (menu->sym && menu->sym->type != 
S_UNKNOWN) {
+                                               menu_set_type(menu->sym->type);
+                                               break;
+                                       }
+                               }
+                       }
+                       /* set the type of the remaining choice values */
+                       for (menu = parent->list; menu; menu = menu->next) {
+                               current_entry = menu;
+                               if (menu->sym && menu->sym->type == S_UNKNOWN)
+                                       menu_set_type(sym->type);
+                       }
+                       parentdep = expr_alloc_symbol(sym);
+               } else if (parent->prompt)
+                       parentdep = parent->prompt->visible.expr;
+               else
+                       parentdep = parent->dep;
+
+               for (menu = parent->list; menu; menu = menu->next) {
+                       basedep = expr_transform(menu->dep);
+                       basedep = expr_alloc_and(expr_copy(parentdep), basedep);
+                       basedep = expr_eliminate_dups(basedep);
+                       menu->dep = basedep;
+                       if (menu->sym)
+                               prop = menu->sym->prop;
+                       else
+                               prop = menu->prompt;
+                       for (; prop; prop = prop->next) {
+                               if (prop->menu != menu)
+                                       continue;
+                               dep = expr_transform(prop->visible.expr);
+                               dep = expr_alloc_and(expr_copy(basedep), dep);
+                               dep = expr_eliminate_dups(dep);
+                               if (menu->sym && menu->sym->type != S_TRISTATE)
+                                       dep = expr_trans_bool(dep);
+                               prop->visible.expr = dep;
+                               if (prop->type == P_SELECT) {
+                                       struct symbol *es = 
prop_get_symbol(prop);
+                                       es->rev_dep.expr = 
expr_alloc_or(es->rev_dep.expr,
+                                                       
expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
+                               }
+                       }
+               }
+               for (menu = parent->list; menu; menu = menu->next)
+                       menu_finalize(menu);
+       } else if (sym) {
+               basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
+               basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
+               basedep = expr_eliminate_dups(expr_transform(basedep));
+               last_menu = NULL;
+               for (menu = parent->next; menu; menu = menu->next) {
+                       dep = menu->prompt ? menu->prompt->visible.expr : 
menu->dep;
+                       if (!expr_contains_symbol(dep, sym))
+                               break;
+                       if (expr_depends_symbol(dep, sym))
+                               goto next;
+                       dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
+                       dep = expr_eliminate_dups(expr_transform(dep));
+                       dep2 = expr_copy(basedep);
+                       expr_eliminate_eq(&dep, &dep2);
+                       expr_free(dep);
+                       if (!expr_is_yes(dep2)) {
+                               expr_free(dep2);
+                               break;
+                       }
+                       expr_free(dep2);
+               next:
+                       menu_finalize(menu);
+                       menu->parent = parent;
+                       last_menu = menu;
+               }
+               if (last_menu) {
+                       parent->list = parent->next;
+                       parent->next = last_menu->next;
+                       last_menu->next = NULL;
+               }
+
+               sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, 
parent->dep);
+       }
+       for (menu = parent->list; menu; menu = menu->next) {
+               if (sym && sym_is_choice(sym) &&
+                   menu->sym && !sym_is_choice_value(menu->sym)) {
+                       current_entry = menu;
+                       menu->sym->flags |= SYMBOL_CHOICEVAL;
+                       if (!menu->prompt)
+                               menu_warn(menu, "choice value must have a 
prompt");
+                       for (prop = menu->sym->prop; prop; prop = prop->next) {
+                               if (prop->type == P_DEFAULT)
+                                       prop_warn(prop, "defaults for choice "
+                                                 "values not supported");
+                               if (prop->menu == menu)
+                                       continue;
+                               if (prop->type == P_PROMPT &&
+                                   prop->menu->parent->sym != sym)
+                                       prop_warn(prop, "choice value used 
outside its choice group");
+                       }
+                       /* Non-tristate choice values of tristate choices must
+                        * depend on the choice being set to Y. The choice
+                        * values' dependencies were propagated to their
+                        * properties above, so the change here must be re-
+                        * propagated.
+                        */
+                       if (sym->type == S_TRISTATE && menu->sym->type != 
S_TRISTATE) {
+                               basedep = expr_alloc_comp(E_EQUAL, sym, 
&symbol_yes);
+                               menu->dep = expr_alloc_and(basedep, menu->dep);
+                               for (prop = menu->sym->prop; prop; prop = 
prop->next) {
+                                       if (prop->menu != menu)
+                                               continue;
+                                       prop->visible.expr = 
expr_alloc_and(expr_copy(basedep),
+                                                                           
prop->visible.expr);
+                               }
+                       }
+                       menu_add_symbol(P_CHOICE, sym, NULL);
+                       prop = sym_get_choice_prop(sym);
+                       for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
+                               ;
+                       *ep = expr_alloc_one(E_LIST, NULL);
+                       (*ep)->right.sym = menu->sym;
+               }
+               if (menu->list && (!menu->prompt || !menu->prompt->text)) {
+                       for (last_menu = menu->list; ; last_menu = 
last_menu->next) {
+                               last_menu->parent = parent;
+                               if (!last_menu->next)
+                                       break;
+                       }
+                       last_menu->next = menu->next;
+                       menu->next = menu->list;
+                       menu->list = NULL;
+               }
+       }
+
+       if (sym && !(sym->flags & SYMBOL_WARNED)) {
+               if (sym->type == S_UNKNOWN)
+                       menu_warn(parent, "config symbol defined without type");
+
+               if (sym_is_choice(sym) && !parent->prompt)
+                       menu_warn(parent, "choice must have a prompt");
+
+               /* Check properties connected to this symbol */
+               sym_check_prop(sym);
+               sym->flags |= SYMBOL_WARNED;
+       }
+
+       if (sym && !sym_is_optional(sym) && parent->prompt) {
+               sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
+                               expr_alloc_and(parent->prompt->visible.expr,
+                                       expr_alloc_symbol(&symbol_mod)));
+       }
+}
+
+bool menu_has_prompt(struct menu *menu)
+{
+       if (!menu->prompt)
+               return false;
+       return true;
+}
+
+/*
+ * Determine if a menu is empty.
+ * A menu is considered empty if it contains no or only
+ * invisible entries.
+ */
+bool menu_is_empty(struct menu *menu)
+{
+       struct menu *child;
+
+       for (child = menu->list; child; child = child->next) {
+               if (menu_is_visible(child))
+                       return(false);
+       }
+       return(true);
+}
+
+bool menu_is_visible(struct menu *menu)
+{
+       struct menu *child;
+       struct symbol *sym;
+       tristate visible;
+
+       if (!menu->prompt)
+               return false;
+
+       if (menu->visibility) {
+               if (expr_calc_value(menu->visibility) == no)
+                       return no;
+       }
+
+       sym = menu->sym;
+       if (sym) {
+               sym_calc_value(sym);
+               visible = menu->prompt->visible.tri;
+       } else
+               visible = menu->prompt->visible.tri = 
expr_calc_value(menu->prompt->visible.expr);
+
+       if (visible != no)
+               return true;
+
+       if (!sym || sym_get_tristate_value(menu->sym) == no)
+               return false;
+
+       for (child = menu->list; child; child = child->next) {
+               if (menu_is_visible(child)) {
+                       if (sym)
+                               sym->flags |= SYMBOL_DEF_USER;
+                       return true;
+               }
+       }
+
+       return false;
+}
+
+const char *menu_get_prompt(struct menu *menu)
+{
+       if (menu->prompt)
+               return menu->prompt->text;
+       else if (menu->sym)
+               return menu->sym->name;
+       return NULL;
+}
+
+struct menu *menu_get_root_menu(struct menu *menu)
+{
+       return &rootmenu;
+}
+
+struct menu *menu_get_parent_menu(struct menu *menu)
+{
+       enum prop_type type;
+
+       for (; menu != &rootmenu; menu = menu->parent) {
+               type = menu->prompt ? menu->prompt->type : 0;
+               if (type == P_MENU)
+                       break;
+       }
+       return menu;
+}
+
+bool menu_has_help(struct menu *menu)
+{
+       return menu->help != NULL;
+}
+
+const char *menu_get_help(struct menu *menu)
+{
+       if (menu->help)
+               return menu->help;
+       else
+               return "";
+}
+
+static void get_prompt_str(struct gstr *r, struct property *prop,
+                          struct list_head *head)
+{
+       int i, j;
+       struct menu *submenu[8], *menu, *location = NULL;
+       struct jump_key *jump = NULL;
+
+       str_printf(r, _("Prompt: %s\n"), _(prop->text));
+       menu = prop->menu->parent;
+       for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) {
+               bool accessible = menu_is_visible(menu);
+
+               submenu[i++] = menu;
+               if (location == NULL && accessible)
+                       location = menu;
+       }
+       if (head && location) {
+               jump = xmalloc(sizeof(struct jump_key));
+
+               if (menu_is_visible(prop->menu)) {
+                       /*
+                        * There is not enough room to put the hint at the
+                        * beginning of the "Prompt" line. Put the hint on the
+                        * last "Location" line even when it would belong on
+                        * the former.
+                        */
+                       jump->target = prop->menu;
+               } else
+                       jump->target = location;
+
+               if (list_empty(head))
+                       jump->index = 0;
+               else
+                       jump->index = list_entry(head->prev, struct jump_key,
+                                                entries)->index + 1;
+
+               list_add_tail(&jump->entries, head);
+       }
+
+       if (i > 0) {
+               str_printf(r, _("  Location:\n"));
+               for (j = 4; --i >= 0; j += 2) {
+                       menu = submenu[i];
+                       if (jump && menu == location)
+                               jump->offset = strlen(r->s);
+                       str_printf(r, "%*c-> %s", j, ' ',
+                                  _(menu_get_prompt(menu)));
+                       if (menu->sym) {
+                               str_printf(r, " (%s [=%s])", menu->sym->name ?
+                                       menu->sym->name : _("<choice>"),
+                                       sym_get_string_value(menu->sym));
+                       }
+                       str_append(r, "\n");
+               }
+       }
+}
+
+/*
+ * get property of type P_SYMBOL
+ */
+static struct property *get_symbol_prop(struct symbol *sym)
+{
+       struct property *prop = NULL;
+
+       for_all_properties(sym, prop, P_SYMBOL)
+               break;
+       return prop;
+}
+
+/*
+ * head is optional and may be NULL
+ */
+static void get_symbol_str(struct gstr *r, struct symbol *sym,
+                   struct list_head *head)
+{
+       bool hit;
+       struct property *prop;
+
+       if (sym && sym->name) {
+               str_printf(r, "Symbol: %s [=%s]\n", sym->name,
+                          sym_get_string_value(sym));
+               str_printf(r, "Type  : %s\n", sym_type_name(sym->type));
+               if (sym->type == S_INT || sym->type == S_HEX) {
+                       prop = sym_get_range_prop(sym);
+                       if (prop) {
+                               str_printf(r, "Range : ");
+                               expr_gstr_print(prop->expr, r);
+                               str_append(r, "\n");
+                       }
+               }
+       }
+       for_all_prompts(sym, prop)
+               get_prompt_str(r, prop, head);
+
+       prop = get_symbol_prop(sym);
+       if (prop) {
+               str_printf(r, _("  Defined at %s:%d\n"), prop->menu->file->name,
+                       prop->menu->lineno);
+               if (!expr_is_yes(prop->visible.expr)) {
+                       str_append(r, _("  Depends on: "));
+                       expr_gstr_print(prop->visible.expr, r);
+                       str_append(r, "\n");
+               }
+       }
+
+       hit = false;
+       for_all_properties(sym, prop, P_SELECT) {
+               if (!hit) {
+                       str_append(r, "  Selects: ");
+                       hit = true;
+               } else
+                       str_printf(r, " && ");
+               expr_gstr_print(prop->expr, r);
+       }
+       if (hit)
+               str_append(r, "\n");
+       if (sym->rev_dep.expr) {
+               str_append(r, _("  Selected by: "));
+               expr_gstr_print(sym->rev_dep.expr, r);
+               str_append(r, "\n");
+       }
+       str_append(r, "\n\n");
+}
+
+struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head)
+{
+       struct symbol *sym;
+       struct gstr res = str_new();
+       int i;
+
+       for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
+               get_symbol_str(&res, sym, head);
+       if (!i)
+               str_append(&res, _("No matches found.\n"));
+       return res;
+}
+
+
+void menu_get_ext_help(struct menu *menu, struct gstr *help)
+{
+       struct symbol *sym = menu->sym;
+       const char *help_text = nohelp_text;
+
+       if (menu_has_help(menu)) {
+               if (sym->name)
+                       str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
+               help_text = menu_get_help(menu);
+       }
+       str_printf(help, "%s\n", _(help_text));
+       if (sym)
+               get_symbol_str(help, sym, NULL);
+}
diff --git a/xen/tools/kconfig/merge_config.sh 
b/xen/tools/kconfig/merge_config.sh
new file mode 100755
index 0000000..0d883b3
--- /dev/null
+++ b/xen/tools/kconfig/merge_config.sh
@@ -0,0 +1,162 @@
+#!/bin/sh
+#  merge_config.sh - Takes a list of config fragment values, and merges
+#  them one by one. Provides warnings on overridden values, and specified
+#  values that did not make it to the resulting .config file (due to missed
+#  dependencies or config symbol removal).
+#
+#  Portions reused from kconf_check and generate_cfg:
+#  
http://git.yoctoproject.org/cgit/cgit.cgi/yocto-kernel-tools/tree/tools/kconf_check
+#  
http://git.yoctoproject.org/cgit/cgit.cgi/yocto-kernel-tools/tree/tools/generate_cfg
+#
+#  Copyright (c) 2009-2010 Wind River Systems, Inc.
+#  Copyright 2011 Linaro
+#
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License version 2 as
+#  published by the Free Software Foundation.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+#  See the GNU General Public License for more details.
+
+clean_up() {
+       rm -f $TMP_FILE
+       exit
+}
+trap clean_up HUP INT TERM
+
+usage() {
+       echo "Usage: $0 [OPTIONS] [CONFIG [...]]"
+       echo "  -h    display this help text"
+       echo "  -m    only merge the fragments, do not execute the make command"
+       echo "  -n    use allnoconfig instead of alldefconfig"
+       echo "  -r    list redundant entries when merging fragments"
+       echo "  -O    dir to put generated output files"
+}
+
+RUNMAKE=true
+ALLTARGET=alldefconfig
+WARNREDUN=false
+OUTPUT=.
+
+while true; do
+       case $1 in
+       "-n")
+               ALLTARGET=allnoconfig
+               shift
+               continue
+               ;;
+       "-m")
+               RUNMAKE=false
+               shift
+               continue
+               ;;
+       "-h")
+               usage
+               exit
+               ;;
+       "-r")
+               WARNREDUN=true
+               shift
+               continue
+               ;;
+       "-O")
+               if [ -d $2 ];then
+                       OUTPUT=$(echo $2 | sed 's/\/*$//')
+               else
+                       echo "output directory $2 does not exist" 1>&2
+                       exit 1
+               fi
+               shift 2
+               continue
+               ;;
+       *)
+               break
+               ;;
+       esac
+done
+
+if [ "$#" -lt 2 ] ; then
+       usage
+       exit
+fi
+
+INITFILE=$1
+shift;
+
+if [ ! -r "$INITFILE" ]; then
+       echo "The base file '$INITFILE' does not exist.  Exit." >&2
+       exit 1
+fi
+
+MERGE_LIST=$*
+SED_CONFIG_EXP="s/^\(# \)\{0,1\}\(CONFIG_[a-zA-Z0-9_]*\)[= ].*/\2/p"
+TMP_FILE=$(mktemp ./.tmp.config.XXXXXXXXXX)
+
+echo "Using $INITFILE as base"
+cat $INITFILE > $TMP_FILE
+
+# Merge files, printing warnings on overridden values
+for MERGE_FILE in $MERGE_LIST ; do
+       echo "Merging $MERGE_FILE"
+       if [ ! -r "$MERGE_FILE" ]; then
+               echo "The merge file '$MERGE_FILE' does not exist.  Exit." >&2
+               exit 1
+       fi
+       CFG_LIST=$(sed -n "$SED_CONFIG_EXP" $MERGE_FILE)
+
+       for CFG in $CFG_LIST ; do
+               grep -q -w $CFG $TMP_FILE || continue
+               PREV_VAL=$(grep -w $CFG $TMP_FILE)
+               NEW_VAL=$(grep -w $CFG $MERGE_FILE)
+               if [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then
+                       echo Value of $CFG is redefined by fragment $MERGE_FILE:
+                       echo Previous  value: $PREV_VAL
+                       echo New value:       $NEW_VAL
+                       echo
+               elif [ "$WARNREDUN" = "true" ]; then
+                       echo Value of $CFG is redundant by fragment $MERGE_FILE:
+               fi
+               sed -i "/$CFG[ =]/d" $TMP_FILE
+       done
+       cat $MERGE_FILE >> $TMP_FILE
+done
+
+if [ "$RUNMAKE" = "false" ]; then
+       cp $TMP_FILE $OUTPUT/.config
+       echo "#"
+       echo "# merged configuration written to $OUTPUT/.config (needs make)"
+       echo "#"
+       clean_up
+       exit
+fi
+
+# If we have an output dir, setup the O= argument, otherwise leave
+# it blank, since O=. will create an unnecessary ./source softlink
+OUTPUT_ARG=""
+if [ "$OUTPUT" != "." ] ; then
+       OUTPUT_ARG="O=$OUTPUT"
+fi
+
+
+# Use the merged file as the starting point for:
+# alldefconfig: Fills in any missing symbols with Kconfig default
+# allnoconfig: Fills in any missing symbols with # CONFIG_* is not set
+make KCONFIG_ALLCONFIG=$TMP_FILE $OUTPUT_ARG $ALLTARGET
+
+
+# Check all specified config values took (might have missed-dependency issues)
+for CFG in $(sed -n "$SED_CONFIG_EXP" $TMP_FILE); do
+
+       REQUESTED_VAL=$(grep -w -e "$CFG" $TMP_FILE)
+       ACTUAL_VAL=$(grep -w -e "$CFG" $OUTPUT/.config)
+       if [ "x$REQUESTED_VAL" != "x$ACTUAL_VAL" ] ; then
+               echo "Value requested for $CFG not in final .config"
+               echo "Requested value:  $REQUESTED_VAL"
+               echo "Actual value:     $ACTUAL_VAL"
+               echo ""
+       fi
+done
+
+clean_up
diff --git a/xen/tools/kconfig/nconf.c b/xen/tools/kconfig/nconf.c
new file mode 100644
index 0000000..d42d534
--- /dev/null
+++ b/xen/tools/kconfig/nconf.c
@@ -0,0 +1,1561 @@
+/*
+ * Copyright (C) 2008 Nir Tzachar <nir.tzachar@xxxxxxxxx?
+ * Released under the terms of the GNU GPL v2.0.
+ *
+ * Derived from menuconfig.
+ *
+ */
+#define _GNU_SOURCE
+#include <string.h>
+#include <stdlib.h>
+
+#include "lkc.h"
+#include "nconf.h"
+#include <ctype.h>
+
+static const char nconf_global_help[] = N_(
+"Help windows\n"
+"------------\n"
+"o  Global help:  Unless in a data entry window, pressing <F1> will give \n"
+"   you the global help window, which you are just reading.\n"
+"\n"
+"o  A short version of the global help is available by pressing <F3>.\n"
+"\n"
+"o  Local help:  To get help related to the current menu entry, use any\n"
+"   of <?> <h>, or if in a data entry window then press <F1>.\n"
+"\n"
+"\n"
+"Menu entries\n"
+"------------\n"
+"This interface lets you select features and parameters for the kernel\n"
+"build.  Kernel features can either be built-in, modularized, or removed.\n"
+"Parameters must be entered as text or decimal or hexadecimal numbers.\n"
+"\n"
+"Menu entries beginning with following braces represent features that\n"
+"  [ ]  can be built in or removed\n"
+"  < >  can be built in, modularized or removed\n"
+"  { }  can be built in or modularized, are selected by another feature\n"
+"  - -  are selected by another feature\n"
+"  XXX  cannot be selected.  Symbol Info <F2> tells you why.\n"
+"*, M or whitespace inside braces means to build in, build as a module\n"
+"or to exclude the feature respectively.\n"
+"\n"
+"To change any of these features, highlight it with the movement keys\n"
+"listed below and press <y> to build it in, <m> to make it a module or\n"
+"<n> to remove it.  You may press the <Space> key to cycle through the\n"
+"available options.\n"
+"\n"
+"A trailing \"--->\" designates a submenu, a trailing \"----\" an\n"
+"empty submenu.\n"
+"\n"
+"Menu navigation keys\n"
+"----------------------------------------------------------------------\n"
+"Linewise up                 <Up>\n"
+"Linewise down               <Down>\n"
+"Pagewise up                 <Page Up>\n"
+"Pagewise down               <Page Down>\n"
+"First entry                 <Home>\n"
+"Last entry                  <End>\n"
+"Enter a submenu             <Right>  <Enter>\n"
+"Go back to parent menu      <Left>   <Esc>  <F5>\n"
+"Close a help window         <Enter>  <Esc>  <F5>\n"
+"Close entry window, apply   <Enter>\n"
+"Close entry window, forget  <Esc>  <F5>\n"
+"Start incremental, case-insensitive search for STRING in menu entries,\n"
+"    no regex support, STRING is displayed in upper left corner\n"
+"                            </>STRING\n"
+"    Remove last character   <Backspace>\n"
+"    Jump to next hit        <Down>\n"
+"    Jump to previous hit    <Up>\n"
+"Exit menu search mode       </>  <Esc>\n"
+"Search for configuration variables with or without leading CONFIG_\n"
+"                            <F8>RegExpr<Enter>\n"
+"Verbose search help         <F8><F1>\n"
+"----------------------------------------------------------------------\n"
+"\n"
+"Unless in a data entry window, key <1> may be used instead of <F1>,\n"
+"<2> instead of <F2>, etc.\n"
+"\n"
+"\n"
+"Radiolist (Choice list)\n"
+"-----------------------\n"
+"Use the movement keys listed above to select the option you wish to set\n"
+"and press <Space>.\n"
+"\n"
+"\n"
+"Data entry\n"
+"----------\n"
+"Enter the requested information and press <Enter>.  Hexadecimal values\n"
+"may be entered without the \"0x\" prefix.\n"
+"\n"
+"\n"
+"Text Box (Help Window)\n"
+"----------------------\n"
+"Use movement keys as listed in table above.\n"
+"\n"
+"Press any of <Enter> <Esc> <q> <F5> <F9> to exit.\n"
+"\n"
+"\n"
+"Alternate configuration files\n"
+"-----------------------------\n"
+"nconfig supports switching between different configurations.\n"
+"Press <F6> to save your current configuration.  Press <F7> and enter\n"
+"a file name to load a previously saved configuration.\n"
+"\n"
+"\n"
+"Terminal configuration\n"
+"----------------------\n"
+"If you use nconfig in a xterm window, make sure your TERM environment\n"
+"variable specifies a terminal configuration which supports at least\n"
+"16 colors.  Otherwise nconfig will look rather bad.\n"
+"\n"
+"If the \"stty size\" command reports the current terminalsize correctly,\n"
+"nconfig will adapt to sizes larger than the traditional 80x25 \"standard\"\n"
+"and display longer menus properly.\n"
+"\n"
+"\n"
+"Single menu mode\n"
+"----------------\n"
+"If you prefer to have all of the menu entries listed in a single menu,\n"
+"rather than the default multimenu hierarchy, run nconfig with\n"
+"NCONFIG_MODE environment variable set to single_menu.  Example:\n"
+"\n"
+"make NCONFIG_MODE=single_menu nconfig\n"
+"\n"
+"<Enter> will then unfold the appropriate category, or fold it if it\n"
+"is already unfolded.  Folded menu entries will be designated by a\n"
+"leading \"++>\" and unfolded entries by a leading \"-->\".\n"
+"\n"
+"Note that this mode can eventually be a little more CPU expensive than\n"
+"the default mode, especially with a larger number of unfolded submenus.\n"
+"\n"),
+menu_no_f_instructions[] = N_(
+"Legend:  [*] built-in  [ ] excluded  <M> module  < > module capable.\n"
+"Submenus are designated by a trailing \"--->\", empty ones by \"----\".\n"
+"\n"
+"Use the following keys to navigate the menus:\n"
+"Move up or down with <Up> and <Down>.\n"
+"Enter a submenu with <Enter> or <Right>.\n"
+"Exit a submenu to its parent menu with <Esc> or <Left>.\n"
+"Pressing <y> includes, <n> excludes, <m> modularizes features.\n"
+"Pressing <Space> cycles through the available options.\n"
+"To search for menu entries press </>.\n"
+"<Esc> always leaves the current window.\n"
+"\n"
+"You do not have function keys support.\n"
+"Press <1> instead of <F1>, <2> instead of <F2>, etc.\n"
+"For verbose global help use key <1>.\n"
+"For help related to the current menu entry press <?> or <h>.\n"),
+menu_instructions[] = N_(
+"Legend:  [*] built-in  [ ] excluded  <M> module  < > module capable.\n"
+"Submenus are designated by a trailing \"--->\", empty ones by \"----\".\n"
+"\n"
+"Use the following keys to navigate the menus:\n"
+"Move up or down with <Up> or <Down>.\n"
+"Enter a submenu with <Enter> or <Right>.\n"
+"Exit a submenu to its parent menu with <Esc> or <Left>.\n"
+"Pressing <y> includes, <n> excludes, <m> modularizes features.\n"
+"Pressing <Space> cycles through the available options.\n"
+"To search for menu entries press </>.\n"
+"<Esc> always leaves the current window.\n"
+"\n"
+"Pressing <1> may be used instead of <F1>, <2> instead of <F2>, etc.\n"
+"For verbose global help press <F1>.\n"
+"For help related to the current menu entry press <?> or <h>.\n"),
+radiolist_instructions[] = N_(
+"Press <Up>, <Down>, <Home> or <End> to navigate a radiolist, select\n"
+"with <Space>.\n"
+"For help related to the current entry press <?> or <h>.\n"
+"For global help press <F1>.\n"),
+inputbox_instructions_int[] = N_(
+"Please enter a decimal value.\n"
+"Fractions will not be accepted.\n"
+"Press <Enter> to apply, <Esc> to cancel."),
+inputbox_instructions_hex[] = N_(
+"Please enter a hexadecimal value.\n"
+"Press <Enter> to apply, <Esc> to cancel."),
+inputbox_instructions_string[] = N_(
+"Please enter a string value.\n"
+"Press <Enter> to apply, <Esc> to cancel."),
+setmod_text[] = N_(
+"This feature depends on another feature which has been configured as a\n"
+"module.  As a result, the current feature will be built as a module too."),
+load_config_text[] = N_(
+"Enter the name of the configuration file you wish to load.\n"
+"Accept the name shown to restore the configuration you last\n"
+"retrieved.  Leave empty to abort."),
+load_config_help[] = N_(
+"For various reasons, one may wish to keep several different\n"
+"configurations available on a single machine.\n"
+"\n"
+"If you have saved a previous configuration in a file other than the\n"
+"default one, entering its name here will allow you to load and modify\n"
+"that configuration.\n"
+"\n"
+"Leave empty to abort.\n"),
+save_config_text[] = N_(
+"Enter a filename to which this configuration should be saved\n"
+"as an alternate.  Leave empty to abort."),
+save_config_help[] = N_(
+"For various reasons, one may wish to keep several different\n"
+"configurations available on a single machine.\n"
+"\n"
+"Entering a file name here will allow you to later retrieve, modify\n"
+"and use the current configuration as an alternate to whatever\n"
+"configuration options you have selected at that time.\n"
+"\n"
+"Leave empty to abort.\n"),
+search_help[] = N_(
+"Search for symbols (configuration variable names CONFIG_*) and display\n"
+"their relations.  Regular expressions are supported.\n"
+"Example:  Search for \"^FOO\".\n"
+"Result:\n"
+"-----------------------------------------------------------------\n"
+"Symbol: FOO [ = m]\n"
+"Prompt: Foo bus is used to drive the bar HW\n"
+"Defined at drivers/pci/Kconfig:47\n"
+"Depends on: X86_LOCAL_APIC && X86_IO_APIC || IA64\n"
+"Location:\n"
+"  -> Bus options (PCI, PCMCIA, EISA, ISA)\n"
+"    -> PCI support (PCI [ = y])\n"
+"      -> PCI access mode (<choice> [ = y])\n"
+"Selects: LIBCRC32\n"
+"Selected by: BAR\n"
+"-----------------------------------------------------------------\n"
+"o  The line 'Prompt:' shows the text displayed for this symbol in\n"
+"   the menu hierarchy.\n"
+"o  The 'Defined at' line tells at what file / line number the symbol is\n"
+"   defined.\n"
+"o  The 'Depends on:' line lists symbols that need to be defined for\n"
+"   this symbol to be visible and selectable in the menu.\n"
+"o  The 'Location:' lines tell, where in the menu structure this symbol\n"
+"   is located.  A location followed by a [ = y] indicates that this is\n"
+"   a selectable menu item, and the current value is displayed inside\n"
+"   brackets.\n"
+"o  The 'Selects:' line tells, what symbol will be automatically selected\n"
+"   if this symbol is selected (y or m).\n"
+"o  The 'Selected by' line tells what symbol has selected this symbol.\n"
+"\n"
+"Only relevant lines are shown.\n"
+"\n\n"
+"Search examples:\n"
+"USB  => find all symbols containing USB\n"
+"^USB => find all symbols starting with USB\n"
+"USB$ => find all symbols ending with USB\n"
+"\n");
+
+struct mitem {
+       char str[256];
+       char tag;
+       void *usrptr;
+       int is_visible;
+};
+
+#define MAX_MENU_ITEMS 4096
+static int show_all_items;
+static int indent;
+static struct menu *current_menu;
+static int child_count;
+static int single_menu_mode;
+/* the window in which all information appears */
+static WINDOW *main_window;
+/* the largest size of the menu window */
+static int mwin_max_lines;
+static int mwin_max_cols;
+/* the window in which we show option buttons */
+static MENU *curses_menu;
+static ITEM *curses_menu_items[MAX_MENU_ITEMS];
+static struct mitem k_menu_items[MAX_MENU_ITEMS];
+static int items_num;
+static int global_exit;
+/* the currently selected button */
+const char *current_instructions = menu_instructions;
+
+static char *dialog_input_result;
+static int dialog_input_result_len;
+
+static void conf(struct menu *menu);
+static void conf_choice(struct menu *menu);
+static void conf_string(struct menu *menu);
+static void conf_load(void);
+static void conf_save(void);
+static void show_help(struct menu *menu);
+static int do_exit(void);
+static void setup_windows(void);
+static void search_conf(void);
+
+typedef void (*function_key_handler_t)(int *key, struct menu *menu);
+static void handle_f1(int *key, struct menu *current_item);
+static void handle_f2(int *key, struct menu *current_item);
+static void handle_f3(int *key, struct menu *current_item);
+static void handle_f4(int *key, struct menu *current_item);
+static void handle_f5(int *key, struct menu *current_item);
+static void handle_f6(int *key, struct menu *current_item);
+static void handle_f7(int *key, struct menu *current_item);
+static void handle_f8(int *key, struct menu *current_item);
+static void handle_f9(int *key, struct menu *current_item);
+
+struct function_keys {
+       const char *key_str;
+       const char *func;
+       function_key key;
+       function_key_handler_t handler;
+};
+
+static const int function_keys_num = 9;
+struct function_keys function_keys[] = {
+       {
+               .key_str = "F1",
+               .func = "Help",
+               .key = F_HELP,
+               .handler = handle_f1,
+       },
+       {
+               .key_str = "F2",
+               .func = "SymInfo",
+               .key = F_SYMBOL,
+               .handler = handle_f2,
+       },
+       {
+               .key_str = "F3",
+               .func = "Help 2",
+               .key = F_INSTS,
+               .handler = handle_f3,
+       },
+       {
+               .key_str = "F4",
+               .func = "ShowAll",
+               .key = F_CONF,
+               .handler = handle_f4,
+       },
+       {
+               .key_str = "F5",
+               .func = "Back",
+               .key = F_BACK,
+               .handler = handle_f5,
+       },
+       {
+               .key_str = "F6",
+               .func = "Save",
+               .key = F_SAVE,
+               .handler = handle_f6,
+       },
+       {
+               .key_str = "F7",
+               .func = "Load",
+               .key = F_LOAD,
+               .handler = handle_f7,
+       },
+       {
+               .key_str = "F8",
+               .func = "SymSearch",
+               .key = F_SEARCH,
+               .handler = handle_f8,
+       },
+       {
+               .key_str = "F9",
+               .func = "Exit",
+               .key = F_EXIT,
+               .handler = handle_f9,
+       },
+};
+
+static void print_function_line(void)
+{
+       int i;
+       int offset = 1;
+       const int skip = 1;
+       int lines = getmaxy(stdscr);
+
+       for (i = 0; i < function_keys_num; i++) {
+               (void) wattrset(main_window, attributes[FUNCTION_HIGHLIGHT]);
+               mvwprintw(main_window, lines-3, offset,
+                               "%s",
+                               function_keys[i].key_str);
+               (void) wattrset(main_window, attributes[FUNCTION_TEXT]);
+               offset += strlen(function_keys[i].key_str);
+               mvwprintw(main_window, lines-3,
+                               offset, "%s",
+                               function_keys[i].func);
+               offset += strlen(function_keys[i].func) + skip;
+       }
+       (void) wattrset(main_window, attributes[NORMAL]);
+}
+
+/* help */
+static void handle_f1(int *key, struct menu *current_item)
+{
+       show_scroll_win(main_window,
+                       _("Global help"), _(nconf_global_help));
+       return;
+}
+
+/* symbole help */
+static void handle_f2(int *key, struct menu *current_item)
+{
+       show_help(current_item);
+       return;
+}
+
+/* instructions */
+static void handle_f3(int *key, struct menu *current_item)
+{
+       show_scroll_win(main_window,
+                       _("Short help"),
+                       _(current_instructions));
+       return;
+}
+
+/* config */
+static void handle_f4(int *key, struct menu *current_item)
+{
+       int res = btn_dialog(main_window,
+                       _("Show all symbols?"),
+                       2,
+                       "   <Show All>   ",
+                       "<Don't show all>");
+       if (res == 0)
+               show_all_items = 1;
+       else if (res == 1)
+               show_all_items = 0;
+
+       return;
+}
+
+/* back */
+static void handle_f5(int *key, struct menu *current_item)
+{
+       *key = KEY_LEFT;
+       return;
+}
+
+/* save */
+static void handle_f6(int *key, struct menu *current_item)
+{
+       conf_save();
+       return;
+}
+
+/* load */
+static void handle_f7(int *key, struct menu *current_item)
+{
+       conf_load();
+       return;
+}
+
+/* search */
+static void handle_f8(int *key, struct menu *current_item)
+{
+       search_conf();
+       return;
+}
+
+/* exit */
+static void handle_f9(int *key, struct menu *current_item)
+{
+       do_exit();
+       return;
+}
+
+/* return != 0 to indicate the key was handles */
+static int process_special_keys(int *key, struct menu *menu)
+{
+       int i;
+
+       if (*key == KEY_RESIZE) {
+               setup_windows();
+               return 1;
+       }
+
+       for (i = 0; i < function_keys_num; i++) {
+               if (*key == KEY_F(function_keys[i].key) ||
+                   *key == '0' + function_keys[i].key){
+                       function_keys[i].handler(key, menu);
+                       return 1;
+               }
+       }
+
+       return 0;
+}
+
+static void clean_items(void)
+{
+       int i;
+       for (i = 0; curses_menu_items[i]; i++)
+               free_item(curses_menu_items[i]);
+       bzero(curses_menu_items, sizeof(curses_menu_items));
+       bzero(k_menu_items, sizeof(k_menu_items));
+       items_num = 0;
+}
+
+typedef enum {MATCH_TINKER_PATTERN_UP, MATCH_TINKER_PATTERN_DOWN,
+       FIND_NEXT_MATCH_DOWN, FIND_NEXT_MATCH_UP} match_f;
+
+/* return the index of the matched item, or -1 if no such item exists */
+static int get_mext_match(const char *match_str, match_f flag)
+{
+       int match_start = item_index(current_item(curses_menu));
+       int index;
+
+       if (flag == FIND_NEXT_MATCH_DOWN)
+               ++match_start;
+       else if (flag == FIND_NEXT_MATCH_UP)
+               --match_start;
+
+       index = match_start;
+       index = (index + items_num) % items_num;
+       while (true) {
+               char *str = k_menu_items[index].str;
+               if (strcasestr(str, match_str) != 0)
+                       return index;
+               if (flag == FIND_NEXT_MATCH_UP ||
+                   flag == MATCH_TINKER_PATTERN_UP)
+                       --index;
+               else
+                       ++index;
+               index = (index + items_num) % items_num;
+               if (index == match_start)
+                       return -1;
+       }
+}
+
+/* Make a new item. */
+static void item_make(struct menu *menu, char tag, const char *fmt, ...)
+{
+       va_list ap;
+
+       if (items_num > MAX_MENU_ITEMS-1)
+               return;
+
+       bzero(&k_menu_items[items_num], sizeof(k_menu_items[0]));
+       k_menu_items[items_num].tag = tag;
+       k_menu_items[items_num].usrptr = menu;
+       if (menu != NULL)
+               k_menu_items[items_num].is_visible =
+                       menu_is_visible(menu);
+       else
+               k_menu_items[items_num].is_visible = 1;
+
+       va_start(ap, fmt);
+       vsnprintf(k_menu_items[items_num].str,
+                 sizeof(k_menu_items[items_num].str),
+                 fmt, ap);
+       va_end(ap);
+
+       if (!k_menu_items[items_num].is_visible)
+               memcpy(k_menu_items[items_num].str, "XXX", 3);
+
+       curses_menu_items[items_num] = new_item(
+                       k_menu_items[items_num].str,
+                       k_menu_items[items_num].str);
+       set_item_userptr(curses_menu_items[items_num],
+                       &k_menu_items[items_num]);
+       /*
+       if (!k_menu_items[items_num].is_visible)
+               item_opts_off(curses_menu_items[items_num], O_SELECTABLE);
+       */
+
+       items_num++;
+       curses_menu_items[items_num] = NULL;
+}
+
+/* very hackish. adds a string to the last item added */
+static void item_add_str(const char *fmt, ...)
+{
+       va_list ap;
+       int index = items_num-1;
+       char new_str[256];
+       char tmp_str[256];
+
+       if (index < 0)
+               return;
+
+       va_start(ap, fmt);
+       vsnprintf(new_str, sizeof(new_str), fmt, ap);
+       va_end(ap);
+       snprintf(tmp_str, sizeof(tmp_str), "%s%s",
+                       k_menu_items[index].str, new_str);
+       strncpy(k_menu_items[index].str,
+               tmp_str,
+               sizeof(k_menu_items[index].str));
+
+       free_item(curses_menu_items[index]);
+       curses_menu_items[index] = new_item(
+                       k_menu_items[index].str,
+                       k_menu_items[index].str);
+       set_item_userptr(curses_menu_items[index],
+                       &k_menu_items[index]);
+}
+
+/* get the tag of the currently selected item */
+static char item_tag(void)
+{
+       ITEM *cur;
+       struct mitem *mcur;
+
+       cur = current_item(curses_menu);
+       if (cur == NULL)
+               return 0;
+       mcur = (struct mitem *) item_userptr(cur);
+       return mcur->tag;
+}
+
+static int curses_item_index(void)
+{
+       return  item_index(current_item(curses_menu));
+}
+
+static void *item_data(void)
+{
+       ITEM *cur;
+       struct mitem *mcur;
+
+       cur = current_item(curses_menu);
+       if (!cur)
+               return NULL;
+       mcur = (struct mitem *) item_userptr(cur);
+       return mcur->usrptr;
+
+}
+
+static int item_is_tag(char tag)
+{
+       return item_tag() == tag;
+}
+
+static char filename[PATH_MAX+1];
+static char menu_backtitle[PATH_MAX+128];
+static const char *set_config_filename(const char *config_filename)
+{
+       int size;
+
+       size = snprintf(menu_backtitle, sizeof(menu_backtitle),
+                       "%s - %s", config_filename, rootmenu.prompt->text);
+       if (size >= sizeof(menu_backtitle))
+               menu_backtitle[sizeof(menu_backtitle)-1] = '\0';
+
+       size = snprintf(filename, sizeof(filename), "%s", config_filename);
+       if (size >= sizeof(filename))
+               filename[sizeof(filename)-1] = '\0';
+       return menu_backtitle;
+}
+
+/* return = 0 means we are successful.
+ * -1 means go on doing what you were doing
+ */
+static int do_exit(void)
+{
+       int res;
+       if (!conf_get_changed()) {
+               global_exit = 1;
+               return 0;
+       }
+       res = btn_dialog(main_window,
+                       _("Do you wish to save your new configuration?\n"
+                               "<ESC> to cancel and resume nconfig."),
+                       2,
+                       "   <save>   ",
+                       "<don't save>");
+       if (res == KEY_EXIT) {
+               global_exit = 0;
+               return -1;
+       }
+
+       /* if we got here, the user really wants to exit */
+       switch (res) {
+       case 0:
+               res = conf_write(filename);
+               if (res)
+                       btn_dialog(
+                               main_window,
+                               _("Error during writing of configuration.\n"
+                                 "Your configuration changes were NOT saved."),
+                                 1,
+                                 "<OK>");
+               break;
+       default:
+               btn_dialog(
+                       main_window,
+                       _("Your configuration changes were NOT saved."),
+                       1,
+                       "<OK>");
+               break;
+       }
+       global_exit = 1;
+       return 0;
+}
+
+
+static void search_conf(void)
+{
+       struct symbol **sym_arr;
+       struct gstr res;
+       struct gstr title;
+       char *dialog_input;
+       int dres;
+
+       title = str_new();
+       str_printf( &title, _("Enter (sub)string or regexp to search for "
+                             "(with or without \"%s\")"), CONFIG_);
+
+again:
+       dres = dialog_inputbox(main_window,
+                       _("Search Configuration Parameter"),
+                       str_get(&title),
+                       "", &dialog_input_result, &dialog_input_result_len);
+       switch (dres) {
+       case 0:
+               break;
+       case 1:
+               show_scroll_win(main_window,
+                               _("Search Configuration"), search_help);
+               goto again;
+       default:
+               str_free(&title);
+               return;
+       }
+
+       /* strip the prefix if necessary */
+       dialog_input = dialog_input_result;
+       if (strncasecmp(dialog_input_result, CONFIG_, strlen(CONFIG_)) == 0)
+               dialog_input += strlen(CONFIG_);
+
+       sym_arr = sym_re_search(dialog_input);
+       res = get_relations_str(sym_arr, NULL);
+       free(sym_arr);
+       show_scroll_win(main_window,
+                       _("Search Results"), str_get(&res));
+       str_free(&res);
+       str_free(&title);
+}
+
+
+static void build_conf(struct menu *menu)
+{
+       struct symbol *sym;
+       struct property *prop;
+       struct menu *child;
+       int type, tmp, doint = 2;
+       tristate val;
+       char ch;
+
+       if (!menu || (!show_all_items && !menu_is_visible(menu)))
+               return;
+
+       sym = menu->sym;
+       prop = menu->prompt;
+       if (!sym) {
+               if (prop && menu != current_menu) {
+                       const char *prompt = menu_get_prompt(menu);
+                       enum prop_type ptype;
+                       ptype = menu->prompt ? menu->prompt->type : P_UNKNOWN;
+                       switch (ptype) {
+                       case P_MENU:
+                               child_count++;
+                               prompt = _(prompt);
+                               if (single_menu_mode) {
+                                       item_make(menu, 'm',
+                                               "%s%*c%s",
+                                               menu->data ? "-->" : "++>",
+                                               indent + 1, ' ', prompt);
+                               } else
+                                       item_make(menu, 'm',
+                                                 "   %*c%s  %s",
+                                                 indent + 1, ' ', prompt,
+                                                 menu_is_empty(menu) ? "----" 
: "--->");
+
+                               if (single_menu_mode && menu->data)
+                                       goto conf_childs;
+                               return;
+                       case P_COMMENT:
+                               if (prompt) {
+                                       child_count++;
+                                       item_make(menu, ':',
+                                               "   %*c*** %s ***",
+                                               indent + 1, ' ',
+                                               _(prompt));
+                               }
+                               break;
+                       default:
+                               if (prompt) {
+                                       child_count++;
+                                       item_make(menu, ':', "---%*c%s",
+                                               indent + 1, ' ',
+                                               _(prompt));
+                               }
+                       }
+               } else
+                       doint = 0;
+               goto conf_childs;
+       }
+
+       type = sym_get_type(sym);
+       if (sym_is_choice(sym)) {
+               struct symbol *def_sym = sym_get_choice_value(sym);
+               struct menu *def_menu = NULL;
+
+               child_count++;
+               for (child = menu->list; child; child = child->next) {
+                       if (menu_is_visible(child) && child->sym == def_sym)
+                               def_menu = child;
+               }
+
+               val = sym_get_tristate_value(sym);
+               if (sym_is_changable(sym)) {
+                       switch (type) {
+                       case S_BOOLEAN:
+                               item_make(menu, 't', "[%c]",
+                                               val == no ? ' ' : '*');
+                               break;
+                       case S_TRISTATE:
+                               switch (val) {
+                               case yes:
+                                       ch = '*';
+                                       break;
+                               case mod:
+                                       ch = 'M';
+                                       break;
+                               default:
+                                       ch = ' ';
+                                       break;
+                               }
+                               item_make(menu, 't', "<%c>", ch);
+                               break;
+                       }
+               } else {
+                       item_make(menu, def_menu ? 't' : ':', "   ");
+               }
+
+               item_add_str("%*c%s", indent + 1,
+                               ' ', _(menu_get_prompt(menu)));
+               if (val == yes) {
+                       if (def_menu) {
+                               item_add_str(" (%s)",
+                                       _(menu_get_prompt(def_menu)));
+                               item_add_str("  --->");
+                               if (def_menu->list) {
+                                       indent += 2;
+                                       build_conf(def_menu);
+                                       indent -= 2;
+                               }
+                       }
+                       return;
+               }
+       } else {
+               if (menu == current_menu) {
+                       item_make(menu, ':',
+                               "---%*c%s", indent + 1,
+                               ' ', _(menu_get_prompt(menu)));
+                       goto conf_childs;
+               }
+               child_count++;
+               val = sym_get_tristate_value(sym);
+               if (sym_is_choice_value(sym) && val == yes) {
+                       item_make(menu, ':', "   ");
+               } else {
+                       switch (type) {
+                       case S_BOOLEAN:
+                               if (sym_is_changable(sym))
+                                       item_make(menu, 't', "[%c]",
+                                               val == no ? ' ' : '*');
+                               else
+                                       item_make(menu, 't', "-%c-",
+                                               val == no ? ' ' : '*');
+                               break;
+                       case S_TRISTATE:
+                               switch (val) {
+                               case yes:
+                                       ch = '*';
+                                       break;
+                               case mod:
+                                       ch = 'M';
+                                       break;
+                               default:
+                                       ch = ' ';
+                                       break;
+                               }
+                               if (sym_is_changable(sym)) {
+                                       if (sym->rev_dep.tri == mod)
+                                               item_make(menu,
+                                                       't', "{%c}", ch);
+                                       else
+                                               item_make(menu,
+                                                       't', "<%c>", ch);
+                               } else
+                                       item_make(menu, 't', "-%c-", ch);
+                               break;
+                       default:
+                               tmp = 2 + strlen(sym_get_string_value(sym));
+                               item_make(menu, 's', "    (%s)",
+                                               sym_get_string_value(sym));
+                               tmp = indent - tmp + 4;
+                               if (tmp < 0)
+                                       tmp = 0;
+                               item_add_str("%*c%s%s", tmp, ' ',
+                                               _(menu_get_prompt(menu)),
+                                               (sym_has_value(sym) ||
+                                                !sym_is_changable(sym)) ? "" :
+                                               _(" (NEW)"));
+                               goto conf_childs;
+                       }
+               }
+               item_add_str("%*c%s%s", indent + 1, ' ',
+                               _(menu_get_prompt(menu)),
+                               (sym_has_value(sym) || !sym_is_changable(sym)) ?
+                               "" : _(" (NEW)"));
+               if (menu->prompt && menu->prompt->type == P_MENU) {
+                       item_add_str("  %s", menu_is_empty(menu) ? "----" : 
"--->");
+                       return;
+               }
+       }
+
+conf_childs:
+       indent += doint;
+       for (child = menu->list; child; child = child->next)
+               build_conf(child);
+       indent -= doint;
+}
+
+static void reset_menu(void)
+{
+       unpost_menu(curses_menu);
+       clean_items();
+}
+
+/* adjust the menu to show this item.
+ * prefer not to scroll the menu if possible*/
+static void center_item(int selected_index, int *last_top_row)
+{
+       int toprow;
+
+       set_top_row(curses_menu, *last_top_row);
+       toprow = top_row(curses_menu);
+       if (selected_index < toprow ||
+           selected_index >= toprow+mwin_max_lines) {
+               toprow = max(selected_index-mwin_max_lines/2, 0);
+               if (toprow >= item_count(curses_menu)-mwin_max_lines)
+                       toprow = item_count(curses_menu)-mwin_max_lines;
+               set_top_row(curses_menu, toprow);
+       }
+       set_current_item(curses_menu,
+                       curses_menu_items[selected_index]);
+       *last_top_row = toprow;
+       post_menu(curses_menu);
+       refresh_all_windows(main_window);
+}
+
+/* this function assumes reset_menu has been called before */
+static void show_menu(const char *prompt, const char *instructions,
+               int selected_index, int *last_top_row)
+{
+       int maxx, maxy;
+       WINDOW *menu_window;
+
+       current_instructions = instructions;
+
+       clear();
+       (void) wattrset(main_window, attributes[NORMAL]);
+       print_in_middle(stdscr, 1, 0, getmaxx(stdscr),
+                       menu_backtitle,
+                       attributes[MAIN_HEADING]);
+
+       (void) wattrset(main_window, attributes[MAIN_MENU_BOX]);
+       box(main_window, 0, 0);
+       (void) wattrset(main_window, attributes[MAIN_MENU_HEADING]);
+       mvwprintw(main_window, 0, 3, " %s ", prompt);
+       (void) wattrset(main_window, attributes[NORMAL]);
+
+       set_menu_items(curses_menu, curses_menu_items);
+
+       /* position the menu at the middle of the screen */
+       scale_menu(curses_menu, &maxy, &maxx);
+       maxx = min(maxx, mwin_max_cols-2);
+       maxy = mwin_max_lines;
+       menu_window = derwin(main_window,
+                       maxy,
+                       maxx,
+                       2,
+                       (mwin_max_cols-maxx)/2);
+       keypad(menu_window, TRUE);
+       set_menu_win(curses_menu, menu_window);
+       set_menu_sub(curses_menu, menu_window);
+
+       /* must reassert this after changing items, otherwise returns to a
+        * default of 16
+        */
+       set_menu_format(curses_menu, maxy, 1);
+       center_item(selected_index, last_top_row);
+       set_menu_format(curses_menu, maxy, 1);
+
+       print_function_line();
+
+       /* Post the menu */
+       post_menu(curses_menu);
+       refresh_all_windows(main_window);
+}
+
+static void adj_match_dir(match_f *match_direction)
+{
+       if (*match_direction == FIND_NEXT_MATCH_DOWN)
+               *match_direction =
+                       MATCH_TINKER_PATTERN_DOWN;
+       else if (*match_direction == FIND_NEXT_MATCH_UP)
+               *match_direction =
+                       MATCH_TINKER_PATTERN_UP;
+       /* else, do no change.. */
+}
+
+struct match_state
+{
+       int in_search;
+       match_f match_direction;
+       char pattern[256];
+};
+
+/* Return 0 means I have handled the key. In such a case, ans should hold the
+ * item to center, or -1 otherwise.
+ * Else return -1 .
+ */
+static int do_match(int key, struct match_state *state, int *ans)
+{
+       char c = (char) key;
+       int terminate_search = 0;
+       *ans = -1;
+       if (key == '/' || (state->in_search && key == 27)) {
+               move(0, 0);
+               refresh();
+               clrtoeol();
+               state->in_search = 1-state->in_search;
+               bzero(state->pattern, sizeof(state->pattern));
+               state->match_direction = MATCH_TINKER_PATTERN_DOWN;
+               return 0;
+       } else if (!state->in_search)
+               return 1;
+
+       if (isalnum(c) || isgraph(c) || c == ' ') {
+               state->pattern[strlen(state->pattern)] = c;
+               state->pattern[strlen(state->pattern)] = '\0';
+               adj_match_dir(&state->match_direction);
+               *ans = get_mext_match(state->pattern,
+                               state->match_direction);
+       } else if (key == KEY_DOWN) {
+               state->match_direction = FIND_NEXT_MATCH_DOWN;
+               *ans = get_mext_match(state->pattern,
+                               state->match_direction);
+       } else if (key == KEY_UP) {
+               state->match_direction = FIND_NEXT_MATCH_UP;
+               *ans = get_mext_match(state->pattern,
+                               state->match_direction);
+       } else if (key == KEY_BACKSPACE || key == 127) {
+               state->pattern[strlen(state->pattern)-1] = '\0';
+               adj_match_dir(&state->match_direction);
+       } else
+               terminate_search = 1;
+
+       if (terminate_search) {
+               state->in_search = 0;
+               bzero(state->pattern, sizeof(state->pattern));
+               move(0, 0);
+               refresh();
+               clrtoeol();
+               return -1;
+       }
+       return 0;
+}
+
+static void conf(struct menu *menu)
+{
+       struct menu *submenu = 0;
+       const char *prompt = menu_get_prompt(menu);
+       struct symbol *sym;
+       int res;
+       int current_index = 0;
+       int last_top_row = 0;
+       struct match_state match_state = {
+               .in_search = 0,
+               .match_direction = MATCH_TINKER_PATTERN_DOWN,
+               .pattern = "",
+       };
+
+       while (!global_exit) {
+               reset_menu();
+               current_menu = menu;
+               build_conf(menu);
+               if (!child_count)
+                       break;
+
+               show_menu(prompt ? _(prompt) : _("Main Menu"),
+                               _(menu_instructions),
+                               current_index, &last_top_row);
+               keypad((menu_win(curses_menu)), TRUE);
+               while (!global_exit) {
+                       if (match_state.in_search) {
+                               mvprintw(0, 0,
+                                       "searching: %s", match_state.pattern);
+                               clrtoeol();
+                       }
+                       refresh_all_windows(main_window);
+                       res = wgetch(menu_win(curses_menu));
+                       if (!res)
+                               break;
+                       if (do_match(res, &match_state, &current_index) == 0) {
+                               if (current_index != -1)
+                                       center_item(current_index,
+                                                   &last_top_row);
+                               continue;
+                       }
+                       if (process_special_keys(&res,
+                                               (struct menu *) item_data()))
+                               break;
+                       switch (res) {
+                       case KEY_DOWN:
+                               menu_driver(curses_menu, REQ_DOWN_ITEM);
+                               break;
+                       case KEY_UP:
+                               menu_driver(curses_menu, REQ_UP_ITEM);
+                               break;
+                       case KEY_NPAGE:
+                               menu_driver(curses_menu, REQ_SCR_DPAGE);
+                               break;
+                       case KEY_PPAGE:
+                               menu_driver(curses_menu, REQ_SCR_UPAGE);
+                               break;
+                       case KEY_HOME:
+                               menu_driver(curses_menu, REQ_FIRST_ITEM);
+                               break;
+                       case KEY_END:
+                               menu_driver(curses_menu, REQ_LAST_ITEM);
+                               break;
+                       case 'h':
+                       case '?':
+                               show_help((struct menu *) item_data());
+                               break;
+                       }
+                       if (res == 10 || res == 27 ||
+                               res == 32 || res == 'n' || res == 'y' ||
+                               res == KEY_LEFT || res == KEY_RIGHT ||
+                               res == 'm')
+                               break;
+                       refresh_all_windows(main_window);
+               }
+
+               refresh_all_windows(main_window);
+               /* if ESC or left*/
+               if (res == 27 || (menu != &rootmenu && res == KEY_LEFT))
+                       break;
+
+               /* remember location in the menu */
+               last_top_row = top_row(curses_menu);
+               current_index = curses_item_index();
+
+               if (!item_tag())
+                       continue;
+
+               submenu = (struct menu *) item_data();
+               if (!submenu || !menu_is_visible(submenu))
+                       continue;
+               sym = submenu->sym;
+
+               switch (res) {
+               case ' ':
+                       if (item_is_tag('t'))
+                               sym_toggle_tristate_value(sym);
+                       else if (item_is_tag('m'))
+                               conf(submenu);
+                       break;
+               case KEY_RIGHT:
+               case 10: /* ENTER WAS PRESSED */
+                       switch (item_tag()) {
+                       case 'm':
+                               if (single_menu_mode)
+                                       submenu->data =
+                                               (void *) (long) !submenu->data;
+                               else
+                                       conf(submenu);
+                               break;
+                       case 't':
+                               if (sym_is_choice(sym) &&
+                                   sym_get_tristate_value(sym) == yes)
+                                       conf_choice(submenu);
+                               else if (submenu->prompt &&
+                                        submenu->prompt->type == P_MENU)
+                                       conf(submenu);
+                               else if (res == 10)
+                                       sym_toggle_tristate_value(sym);
+                               break;
+                       case 's':
+                               conf_string(submenu);
+                               break;
+                       }
+                       break;
+               case 'y':
+                       if (item_is_tag('t')) {
+                               if (sym_set_tristate_value(sym, yes))
+                                       break;
+                               if (sym_set_tristate_value(sym, mod))
+                                       btn_dialog(main_window, setmod_text, 0);
+                       }
+                       break;
+               case 'n':
+                       if (item_is_tag('t'))
+                               sym_set_tristate_value(sym, no);
+                       break;
+               case 'm':
+                       if (item_is_tag('t'))
+                               sym_set_tristate_value(sym, mod);
+                       break;
+               }
+       }
+}
+
+static void conf_message_callback(const char *fmt, va_list ap)
+{
+       char buf[1024];
+
+       vsnprintf(buf, sizeof(buf), fmt, ap);
+       btn_dialog(main_window, buf, 1, "<OK>");
+}
+
+static void show_help(struct menu *menu)
+{
+       struct gstr help;
+
+       if (!menu)
+               return;
+
+       help = str_new();
+       menu_get_ext_help(menu, &help);
+       show_scroll_win(main_window, _(menu_get_prompt(menu)), str_get(&help));
+       str_free(&help);
+}
+
+static void conf_choice(struct menu *menu)
+{
+       const char *prompt = _(menu_get_prompt(menu));
+       struct menu *child = 0;
+       struct symbol *active;
+       int selected_index = 0;
+       int last_top_row = 0;
+       int res, i = 0;
+       struct match_state match_state = {
+               .in_search = 0,
+               .match_direction = MATCH_TINKER_PATTERN_DOWN,
+               .pattern = "",
+       };
+
+       active = sym_get_choice_value(menu->sym);
+       /* this is mostly duplicated from the conf() function. */
+       while (!global_exit) {
+               reset_menu();
+
+               for (i = 0, child = menu->list; child; child = child->next) {
+                       if (!show_all_items && !menu_is_visible(child))
+                               continue;
+
+                       if (child->sym == sym_get_choice_value(menu->sym))
+                               item_make(child, ':', "<X> %s",
+                                               _(menu_get_prompt(child)));
+                       else if (child->sym)
+                               item_make(child, ':', "    %s",
+                                               _(menu_get_prompt(child)));
+                       else
+                               item_make(child, ':', "*** %s ***",
+                                               _(menu_get_prompt(child)));
+
+                       if (child->sym == active){
+                               last_top_row = top_row(curses_menu);
+                               selected_index = i;
+                       }
+                       i++;
+               }
+               show_menu(prompt ? _(prompt) : _("Choice Menu"),
+                               _(radiolist_instructions),
+                               selected_index,
+                               &last_top_row);
+               while (!global_exit) {
+                       if (match_state.in_search) {
+                               mvprintw(0, 0, "searching: %s",
+                                        match_state.pattern);
+                               clrtoeol();
+                       }
+                       refresh_all_windows(main_window);
+                       res = wgetch(menu_win(curses_menu));
+                       if (!res)
+                               break;
+                       if (do_match(res, &match_state, &selected_index) == 0) {
+                               if (selected_index != -1)
+                                       center_item(selected_index,
+                                                   &last_top_row);
+                               continue;
+                       }
+                       if (process_special_keys(
+                                               &res,
+                                               (struct menu *) item_data()))
+                               break;
+                       switch (res) {
+                       case KEY_DOWN:
+                               menu_driver(curses_menu, REQ_DOWN_ITEM);
+                               break;
+                       case KEY_UP:
+                               menu_driver(curses_menu, REQ_UP_ITEM);
+                               break;
+                       case KEY_NPAGE:
+                               menu_driver(curses_menu, REQ_SCR_DPAGE);
+                               break;
+                       case KEY_PPAGE:
+                               menu_driver(curses_menu, REQ_SCR_UPAGE);
+                               break;
+                       case KEY_HOME:
+                               menu_driver(curses_menu, REQ_FIRST_ITEM);
+                               break;
+                       case KEY_END:
+                               menu_driver(curses_menu, REQ_LAST_ITEM);
+                               break;
+                       case 'h':
+                       case '?':
+                               show_help((struct menu *) item_data());
+                               break;
+                       }
+                       if (res == 10 || res == 27 || res == ' ' ||
+                                       res == KEY_LEFT){
+                               break;
+                       }
+                       refresh_all_windows(main_window);
+               }
+               /* if ESC or left */
+               if (res == 27 || res == KEY_LEFT)
+                       break;
+
+               child = item_data();
+               if (!child || !menu_is_visible(child) || !child->sym)
+                       continue;
+               switch (res) {
+               case ' ':
+               case  10:
+               case KEY_RIGHT:
+                       sym_set_tristate_value(child->sym, yes);
+                       return;
+               case 'h':
+               case '?':
+                       show_help(child);
+                       active = child->sym;
+                       break;
+               case KEY_EXIT:
+                       return;
+               }
+       }
+}
+
+static void conf_string(struct menu *menu)
+{
+       const char *prompt = menu_get_prompt(menu);
+
+       while (1) {
+               int res;
+               const char *heading;
+
+               switch (sym_get_type(menu->sym)) {
+               case S_INT:
+                       heading = _(inputbox_instructions_int);
+                       break;
+               case S_HEX:
+                       heading = _(inputbox_instructions_hex);
+                       break;
+               case S_STRING:
+                       heading = _(inputbox_instructions_string);
+                       break;
+               default:
+                       heading = _("Internal nconf error!");
+               }
+               res = dialog_inputbox(main_window,
+                               prompt ? _(prompt) : _("Main Menu"),
+                               heading,
+                               sym_get_string_value(menu->sym),
+                               &dialog_input_result,
+                               &dialog_input_result_len);
+               switch (res) {
+               case 0:
+                       if (sym_set_string_value(menu->sym,
+                                               dialog_input_result))
+                               return;
+                       btn_dialog(main_window,
+                               _("You have made an invalid entry."), 0);
+                       break;
+               case 1:
+                       show_help(menu);
+                       break;
+               case KEY_EXIT:
+                       return;
+               }
+       }
+}
+
+static void conf_load(void)
+{
+       while (1) {
+               int res;
+               res = dialog_inputbox(main_window,
+                               NULL, load_config_text,
+                               filename,
+                               &dialog_input_result,
+                               &dialog_input_result_len);
+               switch (res) {
+               case 0:
+                       if (!dialog_input_result[0])
+                               return;
+                       if (!conf_read(dialog_input_result)) {
+                               set_config_filename(dialog_input_result);
+                               sym_set_change_count(1);
+                               return;
+                       }
+                       btn_dialog(main_window, _("File does not exist!"), 0);
+                       break;
+               case 1:
+                       show_scroll_win(main_window,
+                                       _("Load Alternate Configuration"),
+                                       load_config_help);
+                       break;
+               case KEY_EXIT:
+                       return;
+               }
+       }
+}
+
+static void conf_save(void)
+{
+       while (1) {
+               int res;
+               res = dialog_inputbox(main_window,
+                               NULL, save_config_text,
+                               filename,
+                               &dialog_input_result,
+                               &dialog_input_result_len);
+               switch (res) {
+               case 0:
+                       if (!dialog_input_result[0])
+                               return;
+                       res = conf_write(dialog_input_result);
+                       if (!res) {
+                               set_config_filename(dialog_input_result);
+                               return;
+                       }
+                       btn_dialog(main_window, _("Can't create file! "
+                               "Probably a nonexistent directory."),
+                               1, "<OK>");
+                       break;
+               case 1:
+                       show_scroll_win(main_window,
+                               _("Save Alternate Configuration"),
+                               save_config_help);
+                       break;
+               case KEY_EXIT:
+                       return;
+               }
+       }
+}
+
+void setup_windows(void)
+{
+       int lines, columns;
+
+       getmaxyx(stdscr, lines, columns);
+
+       if (main_window != NULL)
+               delwin(main_window);
+
+       /* set up the menu and menu window */
+       main_window = newwin(lines-2, columns-2, 2, 1);
+       keypad(main_window, TRUE);
+       mwin_max_lines = lines-7;
+       mwin_max_cols = columns-6;
+
+       /* panels order is from bottom to top */
+       new_panel(main_window);
+}
+
+int main(int ac, char **av)
+{
+       int lines, columns;
+       char *mode;
+
+       setlocale(LC_ALL, "");
+       bindtextdomain(PACKAGE, LOCALEDIR);
+       textdomain(PACKAGE);
+
+       if (ac > 1 && strcmp(av[1], "-s") == 0) {
+               /* Silence conf_read() until the real callback is set up */
+               conf_set_message_callback(NULL);
+               av++;
+       }
+       conf_parse(av[1]);
+       conf_read(NULL);
+
+       mode = getenv("NCONFIG_MODE");
+       if (mode) {
+               if (!strcasecmp(mode, "single_menu"))
+                       single_menu_mode = 1;
+       }
+
+       /* Initialize curses */
+       initscr();
+       /* set color theme */
+       set_colors();
+
+       cbreak();
+       noecho();
+       keypad(stdscr, TRUE);
+       curs_set(0);
+
+       getmaxyx(stdscr, lines, columns);
+       if (columns < 75 || lines < 20) {
+               endwin();
+               printf("Your terminal should have at "
+                       "least 20 lines and 75 columns\n");
+               return 1;
+       }
+
+       notimeout(stdscr, FALSE);
+#if NCURSES_REENTRANT
+       set_escdelay(1);
+#else
+       ESCDELAY = 1;
+#endif
+
+       /* set btns menu */
+       curses_menu = new_menu(curses_menu_items);
+       menu_opts_off(curses_menu, O_SHOWDESC);
+       menu_opts_on(curses_menu, O_SHOWMATCH);
+       menu_opts_on(curses_menu, O_ONEVALUE);
+       menu_opts_on(curses_menu, O_NONCYCLIC);
+       menu_opts_on(curses_menu, O_IGNORECASE);
+       set_menu_mark(curses_menu, " ");
+       set_menu_fore(curses_menu, attributes[MAIN_MENU_FORE]);
+       set_menu_back(curses_menu, attributes[MAIN_MENU_BACK]);
+       set_menu_grey(curses_menu, attributes[MAIN_MENU_GREY]);
+
+       set_config_filename(conf_get_configname());
+       setup_windows();
+
+       /* check for KEY_FUNC(1) */
+       if (has_key(KEY_F(1)) == FALSE) {
+               show_scroll_win(main_window,
+                               _("Instructions"),
+                               _(menu_no_f_instructions));
+       }
+
+       conf_set_message_callback(conf_message_callback);
+       /* do the work */
+       while (!global_exit) {
+               conf(&rootmenu);
+               if (!global_exit && do_exit() == 0)
+                       break;
+       }
+       /* ok, we are done */
+       unpost_menu(curses_menu);
+       free_menu(curses_menu);
+       delwin(main_window);
+       clear();
+       refresh();
+       endwin();
+       return 0;
+}
diff --git a/xen/tools/kconfig/nconf.gui.c b/xen/tools/kconfig/nconf.gui.c
new file mode 100644
index 0000000..8275f0e
--- /dev/null
+++ b/xen/tools/kconfig/nconf.gui.c
@@ -0,0 +1,656 @@
+/*
+ * Copyright (C) 2008 Nir Tzachar <nir.tzachar@xxxxxxxxx?
+ * Released under the terms of the GNU GPL v2.0.
+ *
+ * Derived from menuconfig.
+ *
+ */
+#include "nconf.h"
+
+/* a list of all the different widgets we use */
+attributes_t attributes[ATTR_MAX+1] = {0};
+
+/* available colors:
+   COLOR_BLACK   0
+   COLOR_RED     1
+   COLOR_GREEN   2
+   COLOR_YELLOW  3
+   COLOR_BLUE    4
+   COLOR_MAGENTA 5
+   COLOR_CYAN    6
+   COLOR_WHITE   7
+   */
+static void set_normal_colors(void)
+{
+       init_pair(NORMAL, -1, -1);
+       init_pair(MAIN_HEADING, COLOR_MAGENTA, -1);
+
+       /* FORE is for the selected item */
+       init_pair(MAIN_MENU_FORE, -1, -1);
+       /* BACK for all the rest */
+       init_pair(MAIN_MENU_BACK, -1, -1);
+       init_pair(MAIN_MENU_GREY, -1, -1);
+       init_pair(MAIN_MENU_HEADING, COLOR_GREEN, -1);
+       init_pair(MAIN_MENU_BOX, COLOR_YELLOW, -1);
+
+       init_pair(SCROLLWIN_TEXT, -1, -1);
+       init_pair(SCROLLWIN_HEADING, COLOR_GREEN, -1);
+       init_pair(SCROLLWIN_BOX, COLOR_YELLOW, -1);
+
+       init_pair(DIALOG_TEXT, -1, -1);
+       init_pair(DIALOG_BOX, COLOR_YELLOW, -1);
+       init_pair(DIALOG_MENU_BACK, COLOR_YELLOW, -1);
+       init_pair(DIALOG_MENU_FORE, COLOR_RED, -1);
+
+       init_pair(INPUT_BOX, COLOR_YELLOW, -1);
+       init_pair(INPUT_HEADING, COLOR_GREEN, -1);
+       init_pair(INPUT_TEXT, -1, -1);
+       init_pair(INPUT_FIELD, -1, -1);
+
+       init_pair(FUNCTION_HIGHLIGHT, -1, -1);
+       init_pair(FUNCTION_TEXT, COLOR_YELLOW, -1);
+}
+
+/* available attributes:
+   A_NORMAL        Normal display (no highlight)
+   A_STANDOUT      Best highlighting mode of the terminal.
+   A_UNDERLINE     Underlining
+   A_REVERSE       Reverse video
+   A_BLINK         Blinking
+   A_DIM           Half bright
+   A_BOLD          Extra bright or bold
+   A_PROTECT       Protected mode
+   A_INVIS         Invisible or blank mode
+   A_ALTCHARSET    Alternate character set
+   A_CHARTEXT      Bit-mask to extract a character
+   COLOR_PAIR(n)   Color-pair number n
+   */
+static void normal_color_theme(void)
+{
+       /* automatically add color... */
+#define mkattr(name, attr) do { \
+attributes[name] = attr | COLOR_PAIR(name); } while (0)
+       mkattr(NORMAL, NORMAL);
+       mkattr(MAIN_HEADING, A_BOLD | A_UNDERLINE);
+
+       mkattr(MAIN_MENU_FORE, A_REVERSE);
+       mkattr(MAIN_MENU_BACK, A_NORMAL);
+       mkattr(MAIN_MENU_GREY, A_NORMAL);
+       mkattr(MAIN_MENU_HEADING, A_BOLD);
+       mkattr(MAIN_MENU_BOX, A_NORMAL);
+
+       mkattr(SCROLLWIN_TEXT, A_NORMAL);
+       mkattr(SCROLLWIN_HEADING, A_BOLD);
+       mkattr(SCROLLWIN_BOX, A_BOLD);
+
+       mkattr(DIALOG_TEXT, A_BOLD);
+       mkattr(DIALOG_BOX, A_BOLD);
+       mkattr(DIALOG_MENU_FORE, A_STANDOUT);
+       mkattr(DIALOG_MENU_BACK, A_NORMAL);
+
+       mkattr(INPUT_BOX, A_NORMAL);
+       mkattr(INPUT_HEADING, A_BOLD);
+       mkattr(INPUT_TEXT, A_NORMAL);
+       mkattr(INPUT_FIELD, A_UNDERLINE);
+
+       mkattr(FUNCTION_HIGHLIGHT, A_BOLD);
+       mkattr(FUNCTION_TEXT, A_REVERSE);
+}
+
+static void no_colors_theme(void)
+{
+       /* automatically add highlight, no color */
+#define mkattrn(name, attr) { attributes[name] = attr; }
+
+       mkattrn(NORMAL, NORMAL);
+       mkattrn(MAIN_HEADING, A_BOLD | A_UNDERLINE);
+
+       mkattrn(MAIN_MENU_FORE, A_STANDOUT);
+       mkattrn(MAIN_MENU_BACK, A_NORMAL);
+       mkattrn(MAIN_MENU_GREY, A_NORMAL);
+       mkattrn(MAIN_MENU_HEADING, A_BOLD);
+       mkattrn(MAIN_MENU_BOX, A_NORMAL);
+
+       mkattrn(SCROLLWIN_TEXT, A_NORMAL);
+       mkattrn(SCROLLWIN_HEADING, A_BOLD);
+       mkattrn(SCROLLWIN_BOX, A_BOLD);
+
+       mkattrn(DIALOG_TEXT, A_NORMAL);
+       mkattrn(DIALOG_BOX, A_BOLD);
+       mkattrn(DIALOG_MENU_FORE, A_STANDOUT);
+       mkattrn(DIALOG_MENU_BACK, A_NORMAL);
+
+       mkattrn(INPUT_BOX, A_BOLD);
+       mkattrn(INPUT_HEADING, A_BOLD);
+       mkattrn(INPUT_TEXT, A_NORMAL);
+       mkattrn(INPUT_FIELD, A_UNDERLINE);
+
+       mkattrn(FUNCTION_HIGHLIGHT, A_BOLD);
+       mkattrn(FUNCTION_TEXT, A_REVERSE);
+}
+
+void set_colors()
+{
+       start_color();
+       use_default_colors();
+       set_normal_colors();
+       if (has_colors()) {
+               normal_color_theme();
+       } else {
+               /* give defaults */
+               no_colors_theme();
+       }
+}
+
+
+/* this changes the windows attributes !!! */
+void print_in_middle(WINDOW *win,
+               int starty,
+               int startx,
+               int width,
+               const char *string,
+               chtype color)
+{      int length, x, y;
+       float temp;
+
+
+       if (win == NULL)
+               win = stdscr;
+       getyx(win, y, x);
+       if (startx != 0)
+               x = startx;
+       if (starty != 0)
+               y = starty;
+       if (width == 0)
+               width = 80;
+
+       length = strlen(string);
+       temp = (width - length) / 2;
+       x = startx + (int)temp;
+       (void) wattrset(win, color);
+       mvwprintw(win, y, x, "%s", string);
+       refresh();
+}
+
+int get_line_no(const char *text)
+{
+       int i;
+       int total = 1;
+
+       if (!text)
+               return 0;
+
+       for (i = 0; text[i] != '\0'; i++)
+               if (text[i] == '\n')
+                       total++;
+       return total;
+}
+
+const char *get_line(const char *text, int line_no)
+{
+       int i;
+       int lines = 0;
+
+       if (!text)
+               return 0;
+
+       for (i = 0; text[i] != '\0' && lines < line_no; i++)
+               if (text[i] == '\n')
+                       lines++;
+       return text+i;
+}
+
+int get_line_length(const char *line)
+{
+       int res = 0;
+       while (*line != '\0' && *line != '\n') {
+               line++;
+               res++;
+       }
+       return res;
+}
+
+/* print all lines to the window. */
+void fill_window(WINDOW *win, const char *text)
+{
+       int x, y;
+       int total_lines = get_line_no(text);
+       int i;
+
+       getmaxyx(win, y, x);
+       /* do not go over end of line */
+       total_lines = min(total_lines, y);
+       for (i = 0; i < total_lines; i++) {
+               char tmp[x+10];
+               const char *line = get_line(text, i);
+               int len = get_line_length(line);
+               strncpy(tmp, line, min(len, x));
+               tmp[len] = '\0';
+               mvwprintw(win, i, 0, "%s", tmp);
+       }
+}
+
+/* get the message, and buttons.
+ * each button must be a char*
+ * return the selected button
+ *
+ * this dialog is used for 2 different things:
+ * 1) show a text box, no buttons.
+ * 2) show a dialog, with horizontal buttons
+ */
+int btn_dialog(WINDOW *main_window, const char *msg, int btn_num, ...)
+{
+       va_list ap;
+       char *btn;
+       int btns_width = 0;
+       int msg_lines = 0;
+       int msg_width = 0;
+       int total_width;
+       int win_rows = 0;
+       WINDOW *win;
+       WINDOW *msg_win;
+       WINDOW *menu_win;
+       MENU *menu;
+       ITEM *btns[btn_num+1];
+       int i, x, y;
+       int res = -1;
+
+
+       va_start(ap, btn_num);
+       for (i = 0; i < btn_num; i++) {
+               btn = va_arg(ap, char *);
+               btns[i] = new_item(btn, "");
+               btns_width += strlen(btn)+1;
+       }
+       va_end(ap);
+       btns[btn_num] = NULL;
+
+       /* find the widest line of msg: */
+       msg_lines = get_line_no(msg);
+       for (i = 0; i < msg_lines; i++) {
+               const char *line = get_line(msg, i);
+               int len = get_line_length(line);
+               if (msg_width < len)
+                       msg_width = len;
+       }
+
+       total_width = max(msg_width, btns_width);
+       /* place dialog in middle of screen */
+       y = (getmaxy(stdscr)-(msg_lines+4))/2;
+       x = (getmaxx(stdscr)-(total_width+4))/2;
+
+
+       /* create the windows */
+       if (btn_num > 0)
+               win_rows = msg_lines+4;
+       else
+               win_rows = msg_lines+2;
+
+       win = newwin(win_rows, total_width+4, y, x);
+       keypad(win, TRUE);
+       menu_win = derwin(win, 1, btns_width, win_rows-2,
+                       1+(total_width+2-btns_width)/2);
+       menu = new_menu(btns);
+       msg_win = derwin(win, win_rows-2, msg_width, 1,
+                       1+(total_width+2-msg_width)/2);
+
+       set_menu_fore(menu, attributes[DIALOG_MENU_FORE]);
+       set_menu_back(menu, attributes[DIALOG_MENU_BACK]);
+
+       (void) wattrset(win, attributes[DIALOG_BOX]);
+       box(win, 0, 0);
+
+       /* print message */
+       (void) wattrset(msg_win, attributes[DIALOG_TEXT]);
+       fill_window(msg_win, msg);
+
+       set_menu_win(menu, win);
+       set_menu_sub(menu, menu_win);
+       set_menu_format(menu, 1, btn_num);
+       menu_opts_off(menu, O_SHOWDESC);
+       menu_opts_off(menu, O_SHOWMATCH);
+       menu_opts_on(menu, O_ONEVALUE);
+       menu_opts_on(menu, O_NONCYCLIC);
+       set_menu_mark(menu, "");
+       post_menu(menu);
+
+
+       touchwin(win);
+       refresh_all_windows(main_window);
+       while ((res = wgetch(win))) {
+               switch (res) {
+               case KEY_LEFT:
+                       menu_driver(menu, REQ_LEFT_ITEM);
+                       break;
+               case KEY_RIGHT:
+                       menu_driver(menu, REQ_RIGHT_ITEM);
+                       break;
+               case 10: /* ENTER */
+               case 27: /* ESCAPE */
+               case ' ':
+               case KEY_F(F_BACK):
+               case KEY_F(F_EXIT):
+                       break;
+               }
+               touchwin(win);
+               refresh_all_windows(main_window);
+
+               if (res == 10 || res == ' ') {
+                       res = item_index(current_item(menu));
+                       break;
+               } else if (res == 27 || res == KEY_F(F_BACK) ||
+                               res == KEY_F(F_EXIT)) {
+                       res = KEY_EXIT;
+                       break;
+               }
+       }
+
+       unpost_menu(menu);
+       free_menu(menu);
+       for (i = 0; i < btn_num; i++)
+               free_item(btns[i]);
+
+       delwin(win);
+       return res;
+}
+
+int dialog_inputbox(WINDOW *main_window,
+               const char *title, const char *prompt,
+               const char *init, char **resultp, int *result_len)
+{
+       int prompt_lines = 0;
+       int prompt_width = 0;
+       WINDOW *win;
+       WINDOW *prompt_win;
+       WINDOW *form_win;
+       PANEL *panel;
+       int i, x, y;
+       int res = -1;
+       int cursor_position = strlen(init);
+       int cursor_form_win;
+       char *result = *resultp;
+
+       if (strlen(init)+1 > *result_len) {
+               *result_len = strlen(init)+1;
+               *resultp = result = realloc(result, *result_len);
+       }
+
+       /* find the widest line of msg: */
+       prompt_lines = get_line_no(prompt);
+       for (i = 0; i < prompt_lines; i++) {
+               const char *line = get_line(prompt, i);
+               int len = get_line_length(line);
+               prompt_width = max(prompt_width, len);
+       }
+
+       if (title)
+               prompt_width = max(prompt_width, strlen(title));
+
+       /* place dialog in middle of screen */
+       y = (getmaxy(stdscr)-(prompt_lines+4))/2;
+       x = (getmaxx(stdscr)-(prompt_width+4))/2;
+
+       strncpy(result, init, *result_len);
+
+       /* create the windows */
+       win = newwin(prompt_lines+6, prompt_width+7, y, x);
+       prompt_win = derwin(win, prompt_lines+1, prompt_width, 2, 2);
+       form_win = derwin(win, 1, prompt_width, prompt_lines+3, 2);
+       keypad(form_win, TRUE);
+
+       (void) wattrset(form_win, attributes[INPUT_FIELD]);
+
+       (void) wattrset(win, attributes[INPUT_BOX]);
+       box(win, 0, 0);
+       (void) wattrset(win, attributes[INPUT_HEADING]);
+       if (title)
+               mvwprintw(win, 0, 3, "%s", title);
+
+       /* print message */
+       (void) wattrset(prompt_win, attributes[INPUT_TEXT]);
+       fill_window(prompt_win, prompt);
+
+       mvwprintw(form_win, 0, 0, "%*s", prompt_width, " ");
+       cursor_form_win = min(cursor_position, prompt_width-1);
+       mvwprintw(form_win, 0, 0, "%s",
+                 result + cursor_position-cursor_form_win);
+
+       /* create panels */
+       panel = new_panel(win);
+
+       /* show the cursor */
+       curs_set(1);
+
+       touchwin(win);
+       refresh_all_windows(main_window);
+       while ((res = wgetch(form_win))) {
+               int len = strlen(result);
+               switch (res) {
+               case 10: /* ENTER */
+               case 27: /* ESCAPE */
+               case KEY_F(F_HELP):
+               case KEY_F(F_EXIT):
+               case KEY_F(F_BACK):
+                       break;
+               case 127:
+               case KEY_BACKSPACE:
+                       if (cursor_position > 0) {
+                               memmove(&result[cursor_position-1],
+                                               &result[cursor_position],
+                                               len-cursor_position+1);
+                               cursor_position--;
+                               cursor_form_win--;
+                               len--;
+                       }
+                       break;
+               case KEY_DC:
+                       if (cursor_position >= 0 && cursor_position < len) {
+                               memmove(&result[cursor_position],
+                                               &result[cursor_position+1],
+                                               len-cursor_position+1);
+                               len--;
+                       }
+                       break;
+               case KEY_UP:
+               case KEY_RIGHT:
+                       if (cursor_position < len) {
+                               cursor_position++;
+                               cursor_form_win++;
+                       }
+                       break;
+               case KEY_DOWN:
+               case KEY_LEFT:
+                       if (cursor_position > 0) {
+                               cursor_position--;
+                               cursor_form_win--;
+                       }
+                       break;
+               case KEY_HOME:
+                       cursor_position = 0;
+                       cursor_form_win = 0;
+                       break;
+               case KEY_END:
+                       cursor_position = len;
+                       cursor_form_win = min(cursor_position, prompt_width-1);
+                       break;
+               default:
+                       if ((isgraph(res) || isspace(res))) {
+                               /* one for new char, one for '\0' */
+                               if (len+2 > *result_len) {
+                                       *result_len = len+2;
+                                       *resultp = result = realloc(result,
+                                                               *result_len);
+                               }
+                               /* insert the char at the proper position */
+                               memmove(&result[cursor_position+1],
+                                               &result[cursor_position],
+                                               len-cursor_position+1);
+                               result[cursor_position] = res;
+                               cursor_position++;
+                               cursor_form_win++;
+                               len++;
+                       } else {
+                               mvprintw(0, 0, "unknown key: %d\n", res);
+                       }
+                       break;
+               }
+               if (cursor_form_win < 0)
+                       cursor_form_win = 0;
+               else if (cursor_form_win > prompt_width-1)
+                       cursor_form_win = prompt_width-1;
+
+               wmove(form_win, 0, 0);
+               wclrtoeol(form_win);
+               mvwprintw(form_win, 0, 0, "%*s", prompt_width, " ");
+               mvwprintw(form_win, 0, 0, "%s",
+                       result + cursor_position-cursor_form_win);
+               wmove(form_win, 0, cursor_form_win);
+               touchwin(win);
+               refresh_all_windows(main_window);
+
+               if (res == 10) {
+                       res = 0;
+                       break;
+               } else if (res == 27 || res == KEY_F(F_BACK) ||
+                               res == KEY_F(F_EXIT)) {
+                       res = KEY_EXIT;
+                       break;
+               } else if (res == KEY_F(F_HELP)) {
+                       res = 1;
+                       break;
+               }
+       }
+
+       /* hide the cursor */
+       curs_set(0);
+       del_panel(panel);
+       delwin(prompt_win);
+       delwin(form_win);
+       delwin(win);
+       return res;
+}
+
+/* refresh all windows in the correct order */
+void refresh_all_windows(WINDOW *main_window)
+{
+       update_panels();
+       touchwin(main_window);
+       refresh();
+}
+
+/* layman's scrollable window... */
+void show_scroll_win(WINDOW *main_window,
+               const char *title,
+               const char *text)
+{
+       int res;
+       int total_lines = get_line_no(text);
+       int x, y, lines, columns;
+       int start_x = 0, start_y = 0;
+       int text_lines = 0, text_cols = 0;
+       int total_cols = 0;
+       int win_cols = 0;
+       int win_lines = 0;
+       int i = 0;
+       WINDOW *win;
+       WINDOW *pad;
+       PANEL *panel;
+
+       getmaxyx(stdscr, lines, columns);
+
+       /* find the widest line of msg: */
+       total_lines = get_line_no(text);
+       for (i = 0; i < total_lines; i++) {
+               const char *line = get_line(text, i);
+               int len = get_line_length(line);
+               total_cols = max(total_cols, len+2);
+       }
+
+       /* create the pad */
+       pad = newpad(total_lines+10, total_cols+10);
+       (void) wattrset(pad, attributes[SCROLLWIN_TEXT]);
+       fill_window(pad, text);
+
+       win_lines = min(total_lines+4, lines-2);
+       win_cols = min(total_cols+2, columns-2);
+       text_lines = max(win_lines-4, 0);
+       text_cols = max(win_cols-2, 0);
+
+       /* place window in middle of screen */
+       y = (lines-win_lines)/2;
+       x = (columns-win_cols)/2;
+
+       win = newwin(win_lines, win_cols, y, x);
+       keypad(win, TRUE);
+       /* show the help in the help window, and show the help panel */
+       (void) wattrset(win, attributes[SCROLLWIN_BOX]);
+       box(win, 0, 0);
+       (void) wattrset(win, attributes[SCROLLWIN_HEADING]);
+       mvwprintw(win, 0, 3, " %s ", title);
+       panel = new_panel(win);
+
+       /* handle scrolling */
+       do {
+
+               copywin(pad, win, start_y, start_x, 2, 2, text_lines,
+                               text_cols, 0);
+               print_in_middle(win,
+                               text_lines+2,
+                               0,
+                               text_cols,
+                               "<OK>",
+                               attributes[DIALOG_MENU_FORE]);
+               wrefresh(win);
+
+               res = wgetch(win);
+               switch (res) {
+               case KEY_NPAGE:
+               case ' ':
+               case 'd':
+                       start_y += text_lines-2;
+                       break;
+               case KEY_PPAGE:
+               case 'u':
+                       start_y -= text_lines+2;
+                       break;
+               case KEY_HOME:
+                       start_y = 0;
+                       break;
+               case KEY_END:
+                       start_y = total_lines-text_lines;
+                       break;
+               case KEY_DOWN:
+               case 'j':
+                       start_y++;
+                       break;
+               case KEY_UP:
+               case 'k':
+                       start_y--;
+                       break;
+               case KEY_LEFT:
+               case 'h':
+                       start_x--;
+                       break;
+               case KEY_RIGHT:
+               case 'l':
+                       start_x++;
+                       break;
+               }
+               if (res == 10 || res == 27 || res == 'q' ||
+                       res == KEY_F(F_HELP) || res == KEY_F(F_BACK) ||
+                       res == KEY_F(F_EXIT))
+                       break;
+               if (start_y < 0)
+                       start_y = 0;
+               if (start_y >= total_lines-text_lines)
+                       start_y = total_lines-text_lines;
+               if (start_x < 0)
+                       start_x = 0;
+               if (start_x >= total_cols-text_cols)
+                       start_x = total_cols-text_cols;
+       } while (res);
+
+       del_panel(panel);
+       delwin(win);
+       refresh_all_windows(main_window);
+}
diff --git a/xen/tools/kconfig/nconf.h b/xen/tools/kconfig/nconf.h
new file mode 100644
index 0000000..0d52617
--- /dev/null
+++ b/xen/tools/kconfig/nconf.h
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2008 Nir Tzachar <nir.tzachar@xxxxxxxxx?
+ * Released under the terms of the GNU GPL v2.0.
+ *
+ * Derived from menuconfig.
+ *
+ */
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <locale.h>
+#include <curses.h>
+#include <menu.h>
+#include <panel.h>
+#include <form.h>
+
+#include <stdio.h>
+#include <time.h>
+#include <sys/time.h>
+
+#include "ncurses.h"
+
+#define max(a, b) ({\
+               typeof(a) _a = a;\
+               typeof(b) _b = b;\
+               _a > _b ? _a : _b; })
+
+#define min(a, b) ({\
+               typeof(a) _a = a;\
+               typeof(b) _b = b;\
+               _a < _b ? _a : _b; })
+
+typedef enum {
+       NORMAL = 1,
+       MAIN_HEADING,
+       MAIN_MENU_BOX,
+       MAIN_MENU_FORE,
+       MAIN_MENU_BACK,
+       MAIN_MENU_GREY,
+       MAIN_MENU_HEADING,
+       SCROLLWIN_TEXT,
+       SCROLLWIN_HEADING,
+       SCROLLWIN_BOX,
+       DIALOG_TEXT,
+       DIALOG_MENU_FORE,
+       DIALOG_MENU_BACK,
+       DIALOG_BOX,
+       INPUT_BOX,
+       INPUT_HEADING,
+       INPUT_TEXT,
+       INPUT_FIELD,
+       FUNCTION_TEXT,
+       FUNCTION_HIGHLIGHT,
+       ATTR_MAX
+} attributes_t;
+extern attributes_t attributes[];
+
+typedef enum {
+       F_HELP = 1,
+       F_SYMBOL = 2,
+       F_INSTS = 3,
+       F_CONF = 4,
+       F_BACK = 5,
+       F_SAVE = 6,
+       F_LOAD = 7,
+       F_SEARCH = 8,
+       F_EXIT = 9,
+} function_key;
+
+void set_colors(void);
+
+/* this changes the windows attributes !!! */
+void print_in_middle(WINDOW *win,
+               int starty,
+               int startx,
+               int width,
+               const char *string,
+               chtype color);
+int get_line_length(const char *line);
+int get_line_no(const char *text);
+const char *get_line(const char *text, int line_no);
+void fill_window(WINDOW *win, const char *text);
+int btn_dialog(WINDOW *main_window, const char *msg, int btn_num, ...);
+int dialog_inputbox(WINDOW *main_window,
+               const char *title, const char *prompt,
+               const char *init, char **resultp, int *result_len);
+void refresh_all_windows(WINDOW *main_window);
+void show_scroll_win(WINDOW *main_window,
+               const char *title,
+               const char *text);
diff --git a/xen/tools/kconfig/qconf.cc b/xen/tools/kconfig/qconf.cc
new file mode 100644
index 0000000..c3bb7fe
--- /dev/null
+++ b/xen/tools/kconfig/qconf.cc
@@ -0,0 +1,1798 @@
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@xxxxxxxxxxxxxx>
+ * Released under the terms of the GNU GPL v2.0.
+ */
+
+#include <qglobal.h>
+
+#if QT_VERSION < 0x040000
+#include <stddef.h>
+#include <qmainwindow.h>
+#include <qvbox.h>
+#include <qvaluelist.h>
+#include <qtextbrowser.h>
+#include <qaction.h>
+#include <qheader.h>
+#include <qfiledialog.h>
+#include <qdragobject.h>
+#include <qpopupmenu.h>
+#else
+#include <q3mainwindow.h>
+#include <q3vbox.h>
+#include <q3valuelist.h>
+#include <q3textbrowser.h>
+#include <q3action.h>
+#include <q3header.h>
+#include <q3filedialog.h>
+#include <q3dragobject.h>
+#include <q3popupmenu.h>
+#endif
+
+#include <qapplication.h>
+#include <qdesktopwidget.h>
+#include <qtoolbar.h>
+#include <qlayout.h>
+#include <qsplitter.h>
+#include <qlineedit.h>
+#include <qlabel.h>
+#include <qpushbutton.h>
+#include <qmenubar.h>
+#include <qmessagebox.h>
+#include <qregexp.h>
+#include <qevent.h>
+
+#include <stdlib.h>
+
+#include "lkc.h"
+#include "qconf.h"
+
+#include "qconf.moc"
+#include "images.c"
+
+#ifdef _
+# undef _
+# define _ qgettext
+#endif
+
+static QApplication *configApp;
+static ConfigSettings *configSettings;
+
+Q3Action *ConfigMainWindow::saveAction;
+
+static inline QString qgettext(const char* str)
+{
+       return QString::fromLocal8Bit(gettext(str));
+}
+
+static inline QString qgettext(const QString& str)
+{
+       return QString::fromLocal8Bit(gettext(str.latin1()));
+}
+
+ConfigSettings::ConfigSettings()
+       : QSettings("kernel.org", "qconf")
+{
+}
+
+/**
+ * Reads a list of integer values from the application settings.
+ */
+Q3ValueList<int> ConfigSettings::readSizes(const QString& key, bool *ok)
+{
+       Q3ValueList<int> result;
+       QStringList entryList = readListEntry(key, ok);
+       QStringList::Iterator it;
+
+       for (it = entryList.begin(); it != entryList.end(); ++it)
+               result.push_back((*it).toInt());
+
+       return result;
+}
+
+/**
+ * Writes a list of integer values to the application settings.
+ */
+bool ConfigSettings::writeSizes(const QString& key, const Q3ValueList<int>& 
value)
+{
+       QStringList stringList;
+       Q3ValueList<int>::ConstIterator it;
+
+       for (it = value.begin(); it != value.end(); ++it)
+               stringList.push_back(QString::number(*it));
+       return writeEntry(key, stringList);
+}
+
+
+/*
+ * set the new data
+ * TODO check the value
+ */
+void ConfigItem::okRename(int col)
+{
+       Parent::okRename(col);
+       sym_set_string_value(menu->sym, text(dataColIdx).latin1());
+       listView()->updateList(this);
+}
+
+/*
+ * update the displayed of a menu entry
+ */
+void ConfigItem::updateMenu(void)
+{
+       ConfigList* list;
+       struct symbol* sym;
+       struct property *prop;
+       QString prompt;
+       int type;
+       tristate expr;
+
+       list = listView();
+       if (goParent) {
+               setPixmap(promptColIdx, list->menuBackPix);
+               prompt = "..";
+               goto set_prompt;
+       }
+
+       sym = menu->sym;
+       prop = menu->prompt;
+       prompt = _(menu_get_prompt(menu));
+
+       if (prop) switch (prop->type) {
+       case P_MENU:
+               if (list->mode == singleMode || list->mode == symbolMode) {
+                       /* a menuconfig entry is displayed differently
+                        * depending whether it's at the view root or a child.
+                        */
+                       if (sym && list->rootEntry == menu)
+                               break;
+                       setPixmap(promptColIdx, list->menuPix);
+               } else {
+                       if (sym)
+                               break;
+                       setPixmap(promptColIdx, 0);
+               }
+               goto set_prompt;
+       case P_COMMENT:
+               setPixmap(promptColIdx, 0);
+               goto set_prompt;
+       default:
+               ;
+       }
+       if (!sym)
+               goto set_prompt;
+
+       setText(nameColIdx, QString::fromLocal8Bit(sym->name));
+
+       type = sym_get_type(sym);
+       switch (type) {
+       case S_BOOLEAN:
+       case S_TRISTATE:
+               char ch;
+
+               if (!sym_is_changable(sym) && list->optMode == normalOpt) {
+                       setPixmap(promptColIdx, 0);
+                       setText(noColIdx, QString::null);
+                       setText(modColIdx, QString::null);
+                       setText(yesColIdx, QString::null);
+                       break;
+               }
+               expr = sym_get_tristate_value(sym);
+               switch (expr) {
+               case yes:
+                       if (sym_is_choice_value(sym) && type == S_BOOLEAN)
+                               setPixmap(promptColIdx, list->choiceYesPix);
+                       else
+                               setPixmap(promptColIdx, list->symbolYesPix);
+                       setText(yesColIdx, "Y");
+                       ch = 'Y';
+                       break;
+               case mod:
+                       setPixmap(promptColIdx, list->symbolModPix);
+                       setText(modColIdx, "M");
+                       ch = 'M';
+                       break;
+               default:
+                       if (sym_is_choice_value(sym) && type == S_BOOLEAN)
+                               setPixmap(promptColIdx, list->choiceNoPix);
+                       else
+                               setPixmap(promptColIdx, list->symbolNoPix);
+                       setText(noColIdx, "N");
+                       ch = 'N';
+                       break;
+               }
+               if (expr != no)
+                       setText(noColIdx, sym_tristate_within_range(sym, no) ? 
"_" : 0);
+               if (expr != mod)
+                       setText(modColIdx, sym_tristate_within_range(sym, mod) 
? "_" : 0);
+               if (expr != yes)
+                       setText(yesColIdx, sym_tristate_within_range(sym, yes) 
? "_" : 0);
+
+               setText(dataColIdx, QChar(ch));
+               break;
+       case S_INT:
+       case S_HEX:
+       case S_STRING:
+               const char* data;
+
+               data = sym_get_string_value(sym);
+
+               int i = list->mapIdx(dataColIdx);
+               if (i >= 0)
+                       setRenameEnabled(i, TRUE);
+               setText(dataColIdx, data);
+               if (type == S_STRING)
+                       prompt = QString("%1: %2").arg(prompt).arg(data);
+               else
+                       prompt = QString("(%2) %1").arg(prompt).arg(data);
+               break;
+       }
+       if (!sym_has_value(sym) && visible)
+               prompt += _(" (NEW)");
+set_prompt:
+       setText(promptColIdx, prompt);
+}
+
+void ConfigItem::testUpdateMenu(bool v)
+{
+       ConfigItem* i;
+
+       visible = v;
+       if (!menu)
+               return;
+
+       sym_calc_value(menu->sym);
+       if (menu->flags & MENU_CHANGED) {
+               /* the menu entry changed, so update all list items */
+               menu->flags &= ~MENU_CHANGED;
+               for (i = (ConfigItem*)menu->data; i; i = i->nextItem)
+                       i->updateMenu();
+       } else if (listView()->updateAll)
+               updateMenu();
+}
+
+void ConfigItem::paintCell(QPainter* p, const QColorGroup& cg, int column, int 
width, int align)
+{
+       ConfigList* list = listView();
+
+       if (visible) {
+               if (isSelected() && !list->hasFocus() && list->mode == menuMode)
+                       Parent::paintCell(p, list->inactivedColorGroup, column, 
width, align);
+               else
+                       Parent::paintCell(p, cg, column, width, align);
+       } else
+               Parent::paintCell(p, list->disabledColorGroup, column, width, 
align);
+}
+
+/*
+ * construct a menu entry
+ */
+void ConfigItem::init(void)
+{
+       if (menu) {
+               ConfigList* list = listView();
+               nextItem = (ConfigItem*)menu->data;
+               menu->data = this;
+
+               if (list->mode != fullMode)
+                       setOpen(TRUE);
+               sym_calc_value(menu->sym);
+       }
+       updateMenu();
+}
+
+/*
+ * destruct a menu entry
+ */
+ConfigItem::~ConfigItem(void)
+{
+       if (menu) {
+               ConfigItem** ip = (ConfigItem**)&menu->data;
+               for (; *ip; ip = &(*ip)->nextItem) {
+                       if (*ip == this) {
+                               *ip = nextItem;
+                               break;
+                       }
+               }
+       }
+}
+
+ConfigLineEdit::ConfigLineEdit(ConfigView* parent)
+       : Parent(parent)
+{
+       connect(this, SIGNAL(lostFocus()), SLOT(hide()));
+}
+
+void ConfigLineEdit::show(ConfigItem* i)
+{
+       item = i;
+       if (sym_get_string_value(item->menu->sym))
+               
setText(QString::fromLocal8Bit(sym_get_string_value(item->menu->sym)));
+       else
+               setText(QString::null);
+       Parent::show();
+       setFocus();
+}
+
+void ConfigLineEdit::keyPressEvent(QKeyEvent* e)
+{
+       switch (e->key()) {
+       case Qt::Key_Escape:
+               break;
+       case Qt::Key_Return:
+       case Qt::Key_Enter:
+               sym_set_string_value(item->menu->sym, text().latin1());
+               parent()->updateList(item);
+               break;
+       default:
+               Parent::keyPressEvent(e);
+               return;
+       }
+       e->accept();
+       parent()->list->setFocus();
+       hide();
+}
+
+ConfigList::ConfigList(ConfigView* p, const char *name)
+       : Parent(p, name),
+         updateAll(false),
+         symbolYesPix(xpm_symbol_yes), symbolModPix(xpm_symbol_mod), 
symbolNoPix(xpm_symbol_no),
+         choiceYesPix(xpm_choice_yes), choiceNoPix(xpm_choice_no),
+         menuPix(xpm_menu), menuInvPix(xpm_menu_inv), 
menuBackPix(xpm_menuback), voidPix(xpm_void),
+         showName(false), showRange(false), showData(false), 
optMode(normalOpt),
+         rootEntry(0), headerPopup(0)
+{
+       int i;
+
+       setSorting(-1);
+       setRootIsDecorated(TRUE);
+       disabledColorGroup = palette().active();
+       disabledColorGroup.setColor(QColorGroup::Text, 
palette().disabled().text());
+       inactivedColorGroup = palette().active();
+       inactivedColorGroup.setColor(QColorGroup::Highlight, 
palette().disabled().highlight());
+
+       connect(this, SIGNAL(selectionChanged(void)),
+               SLOT(updateSelection(void)));
+
+       if (name) {
+               configSettings->beginGroup(name);
+               showName = configSettings->readBoolEntry("/showName", false);
+               showRange = configSettings->readBoolEntry("/showRange", false);
+               showData = configSettings->readBoolEntry("/showData", false);
+               optMode = (enum 
optionMode)configSettings->readNumEntry("/optionMode", false);
+               configSettings->endGroup();
+               connect(configApp, SIGNAL(aboutToQuit()), SLOT(saveSettings()));
+       }
+
+       for (i = 0; i < colNr; i++)
+               colMap[i] = colRevMap[i] = -1;
+       addColumn(promptColIdx, _("Option"));
+
+       reinit();
+}
+
+bool ConfigList::menuSkip(struct menu *menu)
+{
+       if (optMode == normalOpt && menu_is_visible(menu))
+               return false;
+       if (optMode == promptOpt && menu_has_prompt(menu))
+               return false;
+       if (optMode == allOpt)
+               return false;
+       return true;
+}
+
+void ConfigList::reinit(void)
+{
+       removeColumn(dataColIdx);
+       removeColumn(yesColIdx);
+       removeColumn(modColIdx);
+       removeColumn(noColIdx);
+       removeColumn(nameColIdx);
+
+       if (showName)
+               addColumn(nameColIdx, _("Name"));
+       if (showRange) {
+               addColumn(noColIdx, "N");
+               addColumn(modColIdx, "M");
+               addColumn(yesColIdx, "Y");
+       }
+       if (showData)
+               addColumn(dataColIdx, _("Value"));
+
+       updateListAll();
+}
+
+void ConfigList::saveSettings(void)
+{
+       if (name()) {
+               configSettings->beginGroup(name());
+               configSettings->writeEntry("/showName", showName);
+               configSettings->writeEntry("/showRange", showRange);
+               configSettings->writeEntry("/showData", showData);
+               configSettings->writeEntry("/optionMode", (int)optMode);
+               configSettings->endGroup();
+       }
+}
+
+ConfigItem* ConfigList::findConfigItem(struct menu *menu)
+{
+       ConfigItem* item = (ConfigItem*)menu->data;
+
+       for (; item; item = item->nextItem) {
+               if (this == item->listView())
+                       break;
+       }
+
+       return item;
+}
+
+void ConfigList::updateSelection(void)
+{
+       struct menu *menu;
+       enum prop_type type;
+
+       ConfigItem* item = (ConfigItem*)selectedItem();
+       if (!item)
+               return;
+
+       menu = item->menu;
+       emit menuChanged(menu);
+       if (!menu)
+               return;
+       type = menu->prompt ? menu->prompt->type : P_UNKNOWN;
+       if (mode == menuMode && type == P_MENU)
+               emit menuSelected(menu);
+}
+
+void ConfigList::updateList(ConfigItem* item)
+{
+       ConfigItem* last = 0;
+
+       if (!rootEntry) {
+               if (mode != listMode)
+                       goto update;
+               Q3ListViewItemIterator it(this);
+               ConfigItem* item;
+
+               for (; it.current(); ++it) {
+                       item = (ConfigItem*)it.current();
+                       if (!item->menu)
+                               continue;
+                       item->testUpdateMenu(menu_is_visible(item->menu));
+               }
+               return;
+       }
+
+       if (rootEntry != &rootmenu && (mode == singleMode ||
+           (mode == symbolMode && rootEntry->parent != &rootmenu))) {
+               item = firstChild();
+               if (!item)
+                       item = new ConfigItem(this, 0, true);
+               last = item;
+       }
+       if ((mode == singleMode || (mode == symbolMode && !(rootEntry->flags & 
MENU_ROOT))) &&
+           rootEntry->sym && rootEntry->prompt) {
+               item = last ? last->nextSibling() : firstChild();
+               if (!item)
+                       item = new ConfigItem(this, last, rootEntry, true);
+               else
+                       item->testUpdateMenu(true);
+
+               updateMenuList(item, rootEntry);
+               triggerUpdate();
+               return;
+       }
+update:
+       updateMenuList(this, rootEntry);
+       triggerUpdate();
+}
+
+void ConfigList::setValue(ConfigItem* item, tristate val)
+{
+       struct symbol* sym;
+       int type;
+       tristate oldval;
+
+       sym = item->menu ? item->menu->sym : 0;
+       if (!sym)
+               return;
+
+       type = sym_get_type(sym);
+       switch (type) {
+       case S_BOOLEAN:
+       case S_TRISTATE:
+               oldval = sym_get_tristate_value(sym);
+
+               if (!sym_set_tristate_value(sym, val))
+                       return;
+               if (oldval == no && item->menu->list)
+                       item->setOpen(TRUE);
+               parent()->updateList(item);
+               break;
+       }
+}
+
+void ConfigList::changeValue(ConfigItem* item)
+{
+       struct symbol* sym;
+       struct menu* menu;
+       int type, oldexpr, newexpr;
+
+       menu = item->menu;
+       if (!menu)
+               return;
+       sym = menu->sym;
+       if (!sym) {
+               if (item->menu->list)
+                       item->setOpen(!item->isOpen());
+               return;
+       }
+
+       type = sym_get_type(sym);
+       switch (type) {
+       case S_BOOLEAN:
+       case S_TRISTATE:
+               oldexpr = sym_get_tristate_value(sym);
+               newexpr = sym_toggle_tristate_value(sym);
+               if (item->menu->list) {
+                       if (oldexpr == newexpr)
+                               item->setOpen(!item->isOpen());
+                       else if (oldexpr == no)
+                               item->setOpen(TRUE);
+               }
+               if (oldexpr != newexpr)
+                       parent()->updateList(item);
+               break;
+       case S_INT:
+       case S_HEX:
+       case S_STRING:
+               if (colMap[dataColIdx] >= 0)
+                       item->startRename(colMap[dataColIdx]);
+               else
+                       parent()->lineEdit->show(item);
+               break;
+       }
+}
+
+void ConfigList::setRootMenu(struct menu *menu)
+{
+       enum prop_type type;
+
+       if (rootEntry == menu)
+               return;
+       type = menu && menu->prompt ? menu->prompt->type : P_UNKNOWN;
+       if (type != P_MENU)
+               return;
+       updateMenuList(this, 0);
+       rootEntry = menu;
+       updateListAll();
+       setSelected(currentItem(), hasFocus());
+       ensureItemVisible(currentItem());
+}
+
+void ConfigList::setParentMenu(void)
+{
+       ConfigItem* item;
+       struct menu *oldroot;
+
+       oldroot = rootEntry;
+       if (rootEntry == &rootmenu)
+               return;
+       setRootMenu(menu_get_parent_menu(rootEntry->parent));
+
+       Q3ListViewItemIterator it(this);
+       for (; (item = (ConfigItem*)it.current()); it++) {
+               if (item->menu == oldroot) {
+                       setCurrentItem(item);
+                       ensureItemVisible(item);
+                       break;
+               }
+       }
+}
+
+/*
+ * update all the children of a menu entry
+ *   removes/adds the entries from the parent widget as necessary
+ *
+ * parent: either the menu list widget or a menu entry widget
+ * menu: entry to be updated
+ */
+template <class P>
+void ConfigList::updateMenuList(P* parent, struct menu* menu)
+{
+       struct menu* child;
+       ConfigItem* item;
+       ConfigItem* last;
+       bool visible;
+       enum prop_type type;
+
+       if (!menu) {
+               while ((item = parent->firstChild()))
+                       delete item;
+               return;
+       }
+
+       last = parent->firstChild();
+       if (last && !last->goParent)
+               last = 0;
+       for (child = menu->list; child; child = child->next) {
+               item = last ? last->nextSibling() : parent->firstChild();
+               type = child->prompt ? child->prompt->type : P_UNKNOWN;
+
+               switch (mode) {
+               case menuMode:
+                       if (!(child->flags & MENU_ROOT))
+                               goto hide;
+                       break;
+               case symbolMode:
+                       if (child->flags & MENU_ROOT)
+                               goto hide;
+                       break;
+               default:
+                       break;
+               }
+
+               visible = menu_is_visible(child);
+               if (!menuSkip(child)) {
+                       if (!child->sym && !child->list && !child->prompt)
+                               continue;
+                       if (!item || item->menu != child)
+                               item = new ConfigItem(parent, last, child, 
visible);
+                       else
+                               item->testUpdateMenu(visible);
+
+                       if (mode == fullMode || mode == menuMode || type != 
P_MENU)
+                               updateMenuList(item, child);
+                       else
+                               updateMenuList(item, 0);
+                       last = item;
+                       continue;
+               }
+       hide:
+               if (item && item->menu == child) {
+                       last = parent->firstChild();
+                       if (last == item)
+                               last = 0;
+                       else while (last->nextSibling() != item)
+                               last = last->nextSibling();
+                       delete item;
+               }
+       }
+}
+
+void ConfigList::keyPressEvent(QKeyEvent* ev)
+{
+       Q3ListViewItem* i = currentItem();
+       ConfigItem* item;
+       struct menu *menu;
+       enum prop_type type;
+
+       if (ev->key() == Qt::Key_Escape && mode != fullMode && mode != 
listMode) {
+               emit parentSelected();
+               ev->accept();
+               return;
+       }
+
+       if (!i) {
+               Parent::keyPressEvent(ev);
+               return;
+       }
+       item = (ConfigItem*)i;
+
+       switch (ev->key()) {
+       case Qt::Key_Return:
+       case Qt::Key_Enter:
+               if (item->goParent) {
+                       emit parentSelected();
+                       break;
+               }
+               menu = item->menu;
+               if (!menu)
+                       break;
+               type = menu->prompt ? menu->prompt->type : P_UNKNOWN;
+               if (type == P_MENU && rootEntry != menu &&
+                   mode != fullMode && mode != menuMode) {
+                       emit menuSelected(menu);
+                       break;
+               }
+       case Qt::Key_Space:
+               changeValue(item);
+               break;
+       case Qt::Key_N:
+               setValue(item, no);
+               break;
+       case Qt::Key_M:
+               setValue(item, mod);
+               break;
+       case Qt::Key_Y:
+               setValue(item, yes);
+               break;
+       default:
+               Parent::keyPressEvent(ev);
+               return;
+       }
+       ev->accept();
+}
+
+void ConfigList::contentsMousePressEvent(QMouseEvent* e)
+{
+       //QPoint p(contentsToViewport(e->pos()));
+       //printf("contentsMousePressEvent: %d,%d\n", p.x(), p.y());
+       Parent::contentsMousePressEvent(e);
+}
+
+void ConfigList::contentsMouseReleaseEvent(QMouseEvent* e)
+{
+       QPoint p(contentsToViewport(e->pos()));
+       ConfigItem* item = (ConfigItem*)itemAt(p);
+       struct menu *menu;
+       enum prop_type ptype;
+       const QPixmap* pm;
+       int idx, x;
+
+       if (!item)
+               goto skip;
+
+       menu = item->menu;
+       x = header()->offset() + p.x();
+       idx = colRevMap[header()->sectionAt(x)];
+       switch (idx) {
+       case promptColIdx:
+               pm = item->pixmap(promptColIdx);
+               if (pm) {
+                       int off = header()->sectionPos(0) + itemMargin() +
+                               treeStepSize() * (item->depth() + 
(rootIsDecorated() ? 1 : 0));
+                       if (x >= off && x < off + pm->width()) {
+                               if (item->goParent) {
+                                       emit parentSelected();
+                                       break;
+                               } else if (!menu)
+                                       break;
+                               ptype = menu->prompt ? menu->prompt->type : 
P_UNKNOWN;
+                               if (ptype == P_MENU && rootEntry != menu &&
+                                   mode != fullMode && mode != menuMode)
+                                       emit menuSelected(menu);
+                               else
+                                       changeValue(item);
+                       }
+               }
+               break;
+       case noColIdx:
+               setValue(item, no);
+               break;
+       case modColIdx:
+               setValue(item, mod);
+               break;
+       case yesColIdx:
+               setValue(item, yes);
+               break;
+       case dataColIdx:
+               changeValue(item);
+               break;
+       }
+
+skip:
+       //printf("contentsMouseReleaseEvent: %d,%d\n", p.x(), p.y());
+       Parent::contentsMouseReleaseEvent(e);
+}
+
+void ConfigList::contentsMouseMoveEvent(QMouseEvent* e)
+{
+       //QPoint p(contentsToViewport(e->pos()));
+       //printf("contentsMouseMoveEvent: %d,%d\n", p.x(), p.y());
+       Parent::contentsMouseMoveEvent(e);
+}
+
+void ConfigList::contentsMouseDoubleClickEvent(QMouseEvent* e)
+{
+       QPoint p(contentsToViewport(e->pos()));
+       ConfigItem* item = (ConfigItem*)itemAt(p);
+       struct menu *menu;
+       enum prop_type ptype;
+
+       if (!item)
+               goto skip;
+       if (item->goParent) {
+               emit parentSelected();
+               goto skip;
+       }
+       menu = item->menu;
+       if (!menu)
+               goto skip;
+       ptype = menu->prompt ? menu->prompt->type : P_UNKNOWN;
+       if (ptype == P_MENU && (mode == singleMode || mode == symbolMode))
+               emit menuSelected(menu);
+       else if (menu->sym)
+               changeValue(item);
+
+skip:
+       //printf("contentsMouseDoubleClickEvent: %d,%d\n", p.x(), p.y());
+       Parent::contentsMouseDoubleClickEvent(e);
+}
+
+void ConfigList::focusInEvent(QFocusEvent *e)
+{
+       struct menu *menu = NULL;
+
+       Parent::focusInEvent(e);
+
+       ConfigItem* item = (ConfigItem *)currentItem();
+       if (item) {
+               setSelected(item, TRUE);
+               menu = item->menu;
+       }
+       emit gotFocus(menu);
+}
+
+void ConfigList::contextMenuEvent(QContextMenuEvent *e)
+{
+       if (e->y() <= header()->geometry().bottom()) {
+               if (!headerPopup) {
+                       Q3Action *action;
+
+                       headerPopup = new Q3PopupMenu(this);
+                       action = new Q3Action(NULL, _("Show Name"), 0, this);
+                         action->setToggleAction(TRUE);
+                         connect(action, SIGNAL(toggled(bool)),
+                                 parent(), SLOT(setShowName(bool)));
+                         connect(parent(), SIGNAL(showNameChanged(bool)),
+                                 action, SLOT(setOn(bool)));
+                         action->setOn(showName);
+                         action->addTo(headerPopup);
+                       action = new Q3Action(NULL, _("Show Range"), 0, this);
+                         action->setToggleAction(TRUE);
+                         connect(action, SIGNAL(toggled(bool)),
+                                 parent(), SLOT(setShowRange(bool)));
+                         connect(parent(), SIGNAL(showRangeChanged(bool)),
+                                 action, SLOT(setOn(bool)));
+                         action->setOn(showRange);
+                         action->addTo(headerPopup);
+                       action = new Q3Action(NULL, _("Show Data"), 0, this);
+                         action->setToggleAction(TRUE);
+                         connect(action, SIGNAL(toggled(bool)),
+                                 parent(), SLOT(setShowData(bool)));
+                         connect(parent(), SIGNAL(showDataChanged(bool)),
+                                 action, SLOT(setOn(bool)));
+                         action->setOn(showData);
+                         action->addTo(headerPopup);
+               }
+               headerPopup->exec(e->globalPos());
+               e->accept();
+       } else
+               e->ignore();
+}
+
+ConfigView*ConfigView::viewList;
+QAction *ConfigView::showNormalAction;
+QAction *ConfigView::showAllAction;
+QAction *ConfigView::showPromptAction;
+
+ConfigView::ConfigView(QWidget* parent, const char *name)
+       : Parent(parent, name)
+{
+       list = new ConfigList(this, name);
+       lineEdit = new ConfigLineEdit(this);
+       lineEdit->hide();
+
+       this->nextView = viewList;
+       viewList = this;
+}
+
+ConfigView::~ConfigView(void)
+{
+       ConfigView** vp;
+
+       for (vp = &viewList; *vp; vp = &(*vp)->nextView) {
+               if (*vp == this) {
+                       *vp = nextView;
+                       break;
+               }
+       }
+}
+
+void ConfigView::setOptionMode(QAction *act)
+{
+       if (act == showNormalAction)
+               list->optMode = normalOpt;
+       else if (act == showAllAction)
+               list->optMode = allOpt;
+       else
+               list->optMode = promptOpt;
+
+       list->updateListAll();
+}
+
+void ConfigView::setShowName(bool b)
+{
+       if (list->showName != b) {
+               list->showName = b;
+               list->reinit();
+               emit showNameChanged(b);
+       }
+}
+
+void ConfigView::setShowRange(bool b)
+{
+       if (list->showRange != b) {
+               list->showRange = b;
+               list->reinit();
+               emit showRangeChanged(b);
+       }
+}
+
+void ConfigView::setShowData(bool b)
+{
+       if (list->showData != b) {
+               list->showData = b;
+               list->reinit();
+               emit showDataChanged(b);
+       }
+}
+
+void ConfigList::setAllOpen(bool open)
+{
+       Q3ListViewItemIterator it(this);
+
+       for (; it.current(); it++)
+               it.current()->setOpen(open);
+}
+
+void ConfigView::updateList(ConfigItem* item)
+{
+       ConfigView* v;
+
+       for (v = viewList; v; v = v->nextView)
+               v->list->updateList(item);
+}
+
+void ConfigView::updateListAll(void)
+{
+       ConfigView* v;
+
+       for (v = viewList; v; v = v->nextView)
+               v->list->updateListAll();
+}
+
+ConfigInfoView::ConfigInfoView(QWidget* parent, const char *name)
+       : Parent(parent, name), sym(0), _menu(0)
+{
+       if (name) {
+               configSettings->beginGroup(name);
+               _showDebug = configSettings->readBoolEntry("/showDebug", false);
+               configSettings->endGroup();
+               connect(configApp, SIGNAL(aboutToQuit()), SLOT(saveSettings()));
+       }
+}
+
+void ConfigInfoView::saveSettings(void)
+{
+       if (name()) {
+               configSettings->beginGroup(name());
+               configSettings->writeEntry("/showDebug", showDebug());
+               configSettings->endGroup();
+       }
+}
+
+void ConfigInfoView::setShowDebug(bool b)
+{
+       if (_showDebug != b) {
+               _showDebug = b;
+               if (_menu)
+                       menuInfo();
+               else if (sym)
+                       symbolInfo();
+               emit showDebugChanged(b);
+       }
+}
+
+void ConfigInfoView::setInfo(struct menu *m)
+{
+       if (_menu == m)
+               return;
+       _menu = m;
+       sym = NULL;
+       if (!_menu)
+               clear();
+       else
+               menuInfo();
+}
+
+void ConfigInfoView::symbolInfo(void)
+{
+       QString str;
+
+       str += "<big>Symbol: <b>";
+       str += print_filter(sym->name);
+       str += "</b></big><br><br>value: ";
+       str += print_filter(sym_get_string_value(sym));
+       str += "<br>visibility: ";
+       str += sym->visible == yes ? "y" : sym->visible == mod ? "m" : "n";
+       str += "<br>";
+       str += debug_info(sym);
+
+       setText(str);
+}
+
+void ConfigInfoView::menuInfo(void)
+{
+       struct symbol* sym;
+       QString head, debug, help;
+
+       sym = _menu->sym;
+       if (sym) {
+               if (_menu->prompt) {
+                       head += "<big><b>";
+                       head += print_filter(_(_menu->prompt->text));
+                       head += "</b></big>";
+                       if (sym->name) {
+                               head += " (";
+                               if (showDebug())
+                                       head += QString().sprintf("<a 
href=\"s%p\">", sym);
+                               head += print_filter(sym->name);
+                               if (showDebug())
+                                       head += "</a>";
+                               head += ")";
+                       }
+               } else if (sym->name) {
+                       head += "<big><b>";
+                       if (showDebug())
+                               head += QString().sprintf("<a href=\"s%p\">", 
sym);
+                       head += print_filter(sym->name);
+                       if (showDebug())
+                               head += "</a>";
+                       head += "</b></big>";
+               }
+               head += "<br><br>";
+
+               if (showDebug())
+                       debug = debug_info(sym);
+
+               struct gstr help_gstr = str_new();
+               menu_get_ext_help(_menu, &help_gstr);
+               help = print_filter(str_get(&help_gstr));
+               str_free(&help_gstr);
+       } else if (_menu->prompt) {
+               head += "<big><b>";
+               head += print_filter(_(_menu->prompt->text));
+               head += "</b></big><br><br>";
+               if (showDebug()) {
+                       if (_menu->prompt->visible.expr) {
+                               debug += "&nbsp;&nbsp;dep: ";
+                               expr_print(_menu->prompt->visible.expr, 
expr_print_help, &debug, E_NONE);
+                               debug += "<br><br>";
+                       }
+               }
+       }
+       if (showDebug())
+               debug += QString().sprintf("defined at %s:%d<br><br>", 
_menu->file->name, _menu->lineno);
+
+       setText(head + debug + help);
+}
+
+QString ConfigInfoView::debug_info(struct symbol *sym)
+{
+       QString debug;
+
+       debug += "type: ";
+       debug += print_filter(sym_type_name(sym->type));
+       if (sym_is_choice(sym))
+               debug += " (choice)";
+       debug += "<br>";
+       if (sym->rev_dep.expr) {
+               debug += "reverse dep: ";
+               expr_print(sym->rev_dep.expr, expr_print_help, &debug, E_NONE);
+               debug += "<br>";
+       }
+       for (struct property *prop = sym->prop; prop; prop = prop->next) {
+               switch (prop->type) {
+               case P_PROMPT:
+               case P_MENU:
+                       debug += QString().sprintf("prompt: <a href=\"m%p\">", 
prop->menu);
+                       debug += print_filter(_(prop->text));
+                       debug += "</a><br>";
+                       break;
+               case P_DEFAULT:
+               case P_SELECT:
+               case P_RANGE:
+               case P_ENV:
+                       debug += prop_get_type_name(prop->type);
+                       debug += ": ";
+                       expr_print(prop->expr, expr_print_help, &debug, E_NONE);
+                       debug += "<br>";
+                       break;
+               case P_CHOICE:
+                       if (sym_is_choice(sym)) {
+                               debug += "choice: ";
+                               expr_print(prop->expr, expr_print_help, &debug, 
E_NONE);
+                               debug += "<br>";
+                       }
+                       break;
+               default:
+                       debug += "unknown property: ";
+                       debug += prop_get_type_name(prop->type);
+                       debug += "<br>";
+               }
+               if (prop->visible.expr) {
+                       debug += "&nbsp;&nbsp;&nbsp;&nbsp;dep: ";
+                       expr_print(prop->visible.expr, expr_print_help, &debug, 
E_NONE);
+                       debug += "<br>";
+               }
+       }
+       debug += "<br>";
+
+       return debug;
+}
+
+QString ConfigInfoView::print_filter(const QString &str)
+{
+       QRegExp re("[<>&\"\\n]");
+       QString res = str;
+       for (int i = 0; (i = res.find(re, i)) >= 0;) {
+               switch (res[i].latin1()) {
+               case '<':
+                       res.replace(i, 1, "&lt;");
+                       i += 4;
+                       break;
+               case '>':
+                       res.replace(i, 1, "&gt;");
+                       i += 4;
+                       break;
+               case '&':
+                       res.replace(i, 1, "&amp;");
+                       i += 5;
+                       break;
+               case '"':
+                       res.replace(i, 1, "&quot;");
+                       i += 6;
+                       break;
+               case '\n':
+                       res.replace(i, 1, "<br>");
+                       i += 4;
+                       break;
+               }
+       }
+       return res;
+}
+
+void ConfigInfoView::expr_print_help(void *data, struct symbol *sym, const 
char *str)
+{
+       QString* text = reinterpret_cast<QString*>(data);
+       QString str2 = print_filter(str);
+
+       if (sym && sym->name && !(sym->flags & SYMBOL_CONST)) {
+               *text += QString().sprintf("<a href=\"s%p\">", sym);
+               *text += str2;
+               *text += "</a>";
+       } else
+               *text += str2;
+}
+
+Q3PopupMenu* ConfigInfoView::createPopupMenu(const QPoint& pos)
+{
+       Q3PopupMenu* popup = Parent::createPopupMenu(pos);
+       Q3Action* action = new Q3Action(NULL, _("Show Debug Info"), 0, popup);
+         action->setToggleAction(TRUE);
+         connect(action, SIGNAL(toggled(bool)), SLOT(setShowDebug(bool)));
+         connect(this, SIGNAL(showDebugChanged(bool)), action, 
SLOT(setOn(bool)));
+         action->setOn(showDebug());
+       popup->insertSeparator();
+       action->addTo(popup);
+       return popup;
+}
+
+void ConfigInfoView::contentsContextMenuEvent(QContextMenuEvent *e)
+{
+       Parent::contentsContextMenuEvent(e);
+}
+
+ConfigSearchWindow::ConfigSearchWindow(ConfigMainWindow* parent, const char 
*name)
+       : Parent(parent, name), result(NULL)
+{
+       setCaption("Search Config");
+
+       QVBoxLayout* layout1 = new QVBoxLayout(this, 11, 6);
+       QHBoxLayout* layout2 = new QHBoxLayout(0, 0, 6);
+       layout2->addWidget(new QLabel(_("Find:"), this));
+       editField = new QLineEdit(this);
+       connect(editField, SIGNAL(returnPressed()), SLOT(search()));
+       layout2->addWidget(editField);
+       searchButton = new QPushButton(_("Search"), this);
+       searchButton->setAutoDefault(FALSE);
+       connect(searchButton, SIGNAL(clicked()), SLOT(search()));
+       layout2->addWidget(searchButton);
+       layout1->addLayout(layout2);
+
+       split = new QSplitter(this);
+       split->setOrientation(Qt::Vertical);
+       list = new ConfigView(split, name);
+       list->list->mode = listMode;
+       info = new ConfigInfoView(split, name);
+       connect(list->list, SIGNAL(menuChanged(struct menu *)),
+               info, SLOT(setInfo(struct menu *)));
+       connect(list->list, SIGNAL(menuChanged(struct menu *)),
+               parent, SLOT(setMenuLink(struct menu *)));
+
+       layout1->addWidget(split);
+
+       if (name) {
+               int x, y, width, height;
+               bool ok;
+
+               configSettings->beginGroup(name);
+               width = configSettings->readNumEntry("/window width", 
parent->width() / 2);
+               height = configSettings->readNumEntry("/window height", 
parent->height() / 2);
+               resize(width, height);
+               x = configSettings->readNumEntry("/window x", 0, &ok);
+               if (ok)
+                       y = configSettings->readNumEntry("/window y", 0, &ok);
+               if (ok)
+                       move(x, y);
+               Q3ValueList<int> sizes = configSettings->readSizes("/split", 
&ok);
+               if (ok)
+                       split->setSizes(sizes);
+               configSettings->endGroup();
+               connect(configApp, SIGNAL(aboutToQuit()), SLOT(saveSettings()));
+       }
+}
+
+void ConfigSearchWindow::saveSettings(void)
+{
+       if (name()) {
+               configSettings->beginGroup(name());
+               configSettings->writeEntry("/window x", pos().x());
+               configSettings->writeEntry("/window y", pos().y());
+               configSettings->writeEntry("/window width", size().width());
+               configSettings->writeEntry("/window height", size().height());
+               configSettings->writeSizes("/split", split->sizes());
+               configSettings->endGroup();
+       }
+}
+
+void ConfigSearchWindow::search(void)
+{
+       struct symbol **p;
+       struct property *prop;
+       ConfigItem *lastItem = NULL;
+
+       free(result);
+       list->list->clear();
+       info->clear();
+
+       result = sym_re_search(editField->text().latin1());
+       if (!result)
+               return;
+       for (p = result; *p; p++) {
+               for_all_prompts((*p), prop)
+                       lastItem = new ConfigItem(list->list, lastItem, 
prop->menu,
+                                                 menu_is_visible(prop->menu));
+       }
+}
+
+/*
+ * Construct the complete config widget
+ */
+ConfigMainWindow::ConfigMainWindow(void)
+       : searchWindow(0)
+{
+       QMenuBar* menu;
+       bool ok;
+       int x, y, width, height;
+       char title[256];
+
+       QDesktopWidget *d = configApp->desktop();
+       snprintf(title, sizeof(title), "%s%s",
+               rootmenu.prompt->text,
+#if QT_VERSION < 0x040000
+               " (Qt3)"
+#else
+               ""
+#endif
+               );
+       setCaption(title);
+
+       width = configSettings->readNumEntry("/window width", d->width() - 64);
+       height = configSettings->readNumEntry("/window height", d->height() - 
64);
+       resize(width, height);
+       x = configSettings->readNumEntry("/window x", 0, &ok);
+       if (ok)
+               y = configSettings->readNumEntry("/window y", 0, &ok);
+       if (ok)
+               move(x, y);
+
+       split1 = new QSplitter(this);
+       split1->setOrientation(Qt::Horizontal);
+       setCentralWidget(split1);
+
+       menuView = new ConfigView(split1, "menu");
+       menuList = menuView->list;
+
+       split2 = new QSplitter(split1);
+       split2->setOrientation(Qt::Vertical);
+
+       // create config tree
+       configView = new ConfigView(split2, "config");
+       configList = configView->list;
+
+       helpText = new ConfigInfoView(split2, "help");
+       helpText->setTextFormat(Qt::RichText);
+
+       setTabOrder(configList, helpText);
+       configList->setFocus();
+
+       menu = menuBar();
+       toolBar = new Q3ToolBar("Tools", this);
+
+       backAction = new Q3Action("Back", QPixmap(xpm_back), _("Back"), 0, 
this);
+         connect(backAction, SIGNAL(activated()), SLOT(goBack()));
+         backAction->setEnabled(FALSE);
+       Q3Action *quitAction = new Q3Action("Quit", _("&Quit"), Qt::CTRL + 
Qt::Key_Q, this);
+         connect(quitAction, SIGNAL(activated()), SLOT(close()));
+       Q3Action *loadAction = new Q3Action("Load", QPixmap(xpm_load), 
_("&Load"), Qt::CTRL + Qt::Key_L, this);
+         connect(loadAction, SIGNAL(activated()), SLOT(loadConfig()));
+       saveAction = new Q3Action("Save", QPixmap(xpm_save), _("&Save"), 
Qt::CTRL + Qt::Key_S, this);
+         connect(saveAction, SIGNAL(activated()), SLOT(saveConfig()));
+       conf_set_changed_callback(conf_changed);
+       // Set saveAction's initial state
+       conf_changed();
+       Q3Action *saveAsAction = new Q3Action("Save As...", _("Save &As..."), 
0, this);
+         connect(saveAsAction, SIGNAL(activated()), SLOT(saveConfigAs()));
+       Q3Action *searchAction = new Q3Action("Find", _("&Find"), Qt::CTRL + 
Qt::Key_F, this);
+         connect(searchAction, SIGNAL(activated()), SLOT(searchConfig()));
+       Q3Action *singleViewAction = new Q3Action("Single View", 
QPixmap(xpm_single_view), _("Single View"), 0, this);
+         connect(singleViewAction, SIGNAL(activated()), 
SLOT(showSingleView()));
+       Q3Action *splitViewAction = new Q3Action("Split View", 
QPixmap(xpm_split_view), _("Split View"), 0, this);
+         connect(splitViewAction, SIGNAL(activated()), SLOT(showSplitView()));
+       Q3Action *fullViewAction = new Q3Action("Full View", 
QPixmap(xpm_tree_view), _("Full View"), 0, this);
+         connect(fullViewAction, SIGNAL(activated()), SLOT(showFullView()));
+
+       Q3Action *showNameAction = new Q3Action(NULL, _("Show Name"), 0, this);
+         showNameAction->setToggleAction(TRUE);
+         connect(showNameAction, SIGNAL(toggled(bool)), configView, 
SLOT(setShowName(bool)));
+         connect(configView, SIGNAL(showNameChanged(bool)), showNameAction, 
SLOT(setOn(bool)));
+         showNameAction->setOn(configView->showName());
+       Q3Action *showRangeAction = new Q3Action(NULL, _("Show Range"), 0, 
this);
+         showRangeAction->setToggleAction(TRUE);
+         connect(showRangeAction, SIGNAL(toggled(bool)), configView, 
SLOT(setShowRange(bool)));
+         connect(configView, SIGNAL(showRangeChanged(bool)), showRangeAction, 
SLOT(setOn(bool)));
+         showRangeAction->setOn(configList->showRange);
+       Q3Action *showDataAction = new Q3Action(NULL, _("Show Data"), 0, this);
+         showDataAction->setToggleAction(TRUE);
+         connect(showDataAction, SIGNAL(toggled(bool)), configView, 
SLOT(setShowData(bool)));
+         connect(configView, SIGNAL(showDataChanged(bool)), showDataAction, 
SLOT(setOn(bool)));
+         showDataAction->setOn(configList->showData);
+
+       QActionGroup *optGroup = new QActionGroup(this);
+       optGroup->setExclusive(TRUE);
+       connect(optGroup, SIGNAL(selected(QAction *)), configView,
+               SLOT(setOptionMode(QAction *)));
+       connect(optGroup, SIGNAL(selected(QAction *)), menuView,
+               SLOT(setOptionMode(QAction *)));
+
+#if QT_VERSION >= 0x040000
+       configView->showNormalAction = new QAction(_("Show Normal Options"), 
optGroup);
+       configView->showAllAction = new QAction(_("Show All Options"), 
optGroup);
+       configView->showPromptAction = new QAction(_("Show Prompt Options"), 
optGroup);
+#else
+       configView->showNormalAction = new QAction(_("Show Normal Options"), 0, 
optGroup);
+       configView->showAllAction = new QAction(_("Show All Options"), 0, 
optGroup);
+       configView->showPromptAction = new QAction(_("Show Prompt Options"), 0, 
optGroup);
+#endif
+       configView->showNormalAction->setToggleAction(TRUE);
+       configView->showNormalAction->setOn(configList->optMode == normalOpt);
+       configView->showAllAction->setToggleAction(TRUE);
+       configView->showAllAction->setOn(configList->optMode == allOpt);
+       configView->showPromptAction->setToggleAction(TRUE);
+       configView->showPromptAction->setOn(configList->optMode == promptOpt);
+
+       Q3Action *showDebugAction = new Q3Action(NULL, _("Show Debug Info"), 0, 
this);
+         showDebugAction->setToggleAction(TRUE);
+         connect(showDebugAction, SIGNAL(toggled(bool)), helpText, 
SLOT(setShowDebug(bool)));
+         connect(helpText, SIGNAL(showDebugChanged(bool)), showDebugAction, 
SLOT(setOn(bool)));
+         showDebugAction->setOn(helpText->showDebug());
+
+       Q3Action *showIntroAction = new Q3Action(NULL, _("Introduction"), 0, 
this);
+         connect(showIntroAction, SIGNAL(activated()), SLOT(showIntro()));
+       Q3Action *showAboutAction = new Q3Action(NULL, _("About"), 0, this);
+         connect(showAboutAction, SIGNAL(activated()), SLOT(showAbout()));
+
+       // init tool bar
+       backAction->addTo(toolBar);
+       toolBar->addSeparator();
+       loadAction->addTo(toolBar);
+       saveAction->addTo(toolBar);
+       toolBar->addSeparator();
+       singleViewAction->addTo(toolBar);
+       splitViewAction->addTo(toolBar);
+       fullViewAction->addTo(toolBar);
+
+       // create config menu
+       Q3PopupMenu* config = new Q3PopupMenu(this);
+       menu->insertItem(_("&File"), config);
+       loadAction->addTo(config);
+       saveAction->addTo(config);
+       saveAsAction->addTo(config);
+       config->insertSeparator();
+       quitAction->addTo(config);
+
+       // create edit menu
+       Q3PopupMenu* editMenu = new Q3PopupMenu(this);
+       menu->insertItem(_("&Edit"), editMenu);
+       searchAction->addTo(editMenu);
+
+       // create options menu
+       Q3PopupMenu* optionMenu = new Q3PopupMenu(this);
+       menu->insertItem(_("&Option"), optionMenu);
+       showNameAction->addTo(optionMenu);
+       showRangeAction->addTo(optionMenu);
+       showDataAction->addTo(optionMenu);
+       optionMenu->insertSeparator();
+       optGroup->addTo(optionMenu);
+       optionMenu->insertSeparator();
+
+       // create help menu
+       Q3PopupMenu* helpMenu = new Q3PopupMenu(this);
+       menu->insertSeparator();
+       menu->insertItem(_("&Help"), helpMenu);
+       showIntroAction->addTo(helpMenu);
+       showAboutAction->addTo(helpMenu);
+
+       connect(configList, SIGNAL(menuChanged(struct menu *)),
+               helpText, SLOT(setInfo(struct menu *)));
+       connect(configList, SIGNAL(menuSelected(struct menu *)),
+               SLOT(changeMenu(struct menu *)));
+       connect(configList, SIGNAL(parentSelected()),
+               SLOT(goBack()));
+       connect(menuList, SIGNAL(menuChanged(struct menu *)),
+               helpText, SLOT(setInfo(struct menu *)));
+       connect(menuList, SIGNAL(menuSelected(struct menu *)),
+               SLOT(changeMenu(struct menu *)));
+
+       connect(configList, SIGNAL(gotFocus(struct menu *)),
+               helpText, SLOT(setInfo(struct menu *)));
+       connect(menuList, SIGNAL(gotFocus(struct menu *)),
+               helpText, SLOT(setInfo(struct menu *)));
+       connect(menuList, SIGNAL(gotFocus(struct menu *)),
+               SLOT(listFocusChanged(void)));
+       connect(helpText, SIGNAL(menuSelected(struct menu *)),
+               SLOT(setMenuLink(struct menu *)));
+
+       QString listMode = configSettings->readEntry("/listMode", "symbol");
+       if (listMode == "single")
+               showSingleView();
+       else if (listMode == "full")
+               showFullView();
+       else /*if (listMode == "split")*/
+               showSplitView();
+
+       // UI setup done, restore splitter positions
+       Q3ValueList<int> sizes = configSettings->readSizes("/split1", &ok);
+       if (ok)
+               split1->setSizes(sizes);
+
+       sizes = configSettings->readSizes("/split2", &ok);
+       if (ok)
+               split2->setSizes(sizes);
+}
+
+void ConfigMainWindow::loadConfig(void)
+{
+       QString s = Q3FileDialog::getOpenFileName(conf_get_configname(), NULL, 
this);
+       if (s.isNull())
+               return;
+       if (conf_read(QFile::encodeName(s)))
+               QMessageBox::information(this, "qconf", _("Unable to load 
configuration!"));
+       ConfigView::updateListAll();
+}
+
+bool ConfigMainWindow::saveConfig(void)
+{
+       if (conf_write(NULL)) {
+               QMessageBox::information(this, "qconf", _("Unable to save 
configuration!"));
+               return false;
+       }
+       return true;
+}
+
+void ConfigMainWindow::saveConfigAs(void)
+{
+       QString s = Q3FileDialog::getSaveFileName(conf_get_configname(), NULL, 
this);
+       if (s.isNull())
+               return;
+       saveConfig();
+}
+
+void ConfigMainWindow::searchConfig(void)
+{
+       if (!searchWindow)
+               searchWindow = new ConfigSearchWindow(this, "search");
+       searchWindow->show();
+}
+
+void ConfigMainWindow::changeMenu(struct menu *menu)
+{
+       configList->setRootMenu(menu);
+       if (configList->rootEntry->parent == &rootmenu)
+               backAction->setEnabled(FALSE);
+       else
+               backAction->setEnabled(TRUE);
+}
+
+void ConfigMainWindow::setMenuLink(struct menu *menu)
+{
+       struct menu *parent;
+       ConfigList* list = NULL;
+       ConfigItem* item;
+
+       if (configList->menuSkip(menu))
+               return;
+
+       switch (configList->mode) {
+       case singleMode:
+               list = configList;
+               parent = menu_get_parent_menu(menu);
+               if (!parent)
+                       return;
+               list->setRootMenu(parent);
+               break;
+       case symbolMode:
+               if (menu->flags & MENU_ROOT) {
+                       configList->setRootMenu(menu);
+                       configList->clearSelection();
+                       list = menuList;
+               } else {
+                       list = configList;
+                       parent = menu_get_parent_menu(menu->parent);
+                       if (!parent)
+                               return;
+                       item = menuList->findConfigItem(parent);
+                       if (item) {
+                               menuList->setSelected(item, TRUE);
+                               menuList->ensureItemVisible(item);
+                       }
+                       list->setRootMenu(parent);
+               }
+               break;
+       case fullMode:
+               list = configList;
+               break;
+       default:
+               break;
+       }
+
+       if (list) {
+               item = list->findConfigItem(menu);
+               if (item) {
+                       list->setSelected(item, TRUE);
+                       list->ensureItemVisible(item);
+                       list->setFocus();
+               }
+       }
+}
+
+void ConfigMainWindow::listFocusChanged(void)
+{
+       if (menuList->mode == menuMode)
+               configList->clearSelection();
+}
+
+void ConfigMainWindow::goBack(void)
+{
+       ConfigItem* item;
+
+       configList->setParentMenu();
+       if (configList->rootEntry == &rootmenu)
+               backAction->setEnabled(FALSE);
+       item = (ConfigItem*)menuList->selectedItem();
+       while (item) {
+               if (item->menu == configList->rootEntry) {
+                       menuList->setSelected(item, TRUE);
+                       break;
+               }
+               item = (ConfigItem*)item->parent();
+       }
+}
+
+void ConfigMainWindow::showSingleView(void)
+{
+       menuView->hide();
+       menuList->setRootMenu(0);
+       configList->mode = singleMode;
+       if (configList->rootEntry == &rootmenu)
+               configList->updateListAll();
+       else
+               configList->setRootMenu(&rootmenu);
+       configList->setAllOpen(TRUE);
+       configList->setFocus();
+}
+
+void ConfigMainWindow::showSplitView(void)
+{
+       configList->mode = symbolMode;
+       if (configList->rootEntry == &rootmenu)
+               configList->updateListAll();
+       else
+               configList->setRootMenu(&rootmenu);
+       configList->setAllOpen(TRUE);
+       configApp->processEvents();
+       menuList->mode = menuMode;
+       menuList->setRootMenu(&rootmenu);
+       menuList->setAllOpen(TRUE);
+       menuView->show();
+       menuList->setFocus();
+}
+
+void ConfigMainWindow::showFullView(void)
+{
+       menuView->hide();
+       menuList->setRootMenu(0);
+       configList->mode = fullMode;
+       if (configList->rootEntry == &rootmenu)
+               configList->updateListAll();
+       else
+               configList->setRootMenu(&rootmenu);
+       configList->setAllOpen(FALSE);
+       configList->setFocus();
+}
+
+/*
+ * ask for saving configuration before quitting
+ * TODO ask only when something changed
+ */
+void ConfigMainWindow::closeEvent(QCloseEvent* e)
+{
+       if (!conf_get_changed()) {
+               e->accept();
+               return;
+       }
+       QMessageBox mb("qconf", _("Save configuration?"), QMessageBox::Warning,
+                       QMessageBox::Yes | QMessageBox::Default, 
QMessageBox::No, QMessageBox::Cancel | QMessageBox::Escape);
+       mb.setButtonText(QMessageBox::Yes, _("&Save Changes"));
+       mb.setButtonText(QMessageBox::No, _("&Discard Changes"));
+       mb.setButtonText(QMessageBox::Cancel, _("Cancel Exit"));
+       switch (mb.exec()) {
+       case QMessageBox::Yes:
+               if (saveConfig())
+                       e->accept();
+               else
+                       e->ignore();
+               break;
+       case QMessageBox::No:
+               e->accept();
+               break;
+       case QMessageBox::Cancel:
+               e->ignore();
+               break;
+       }
+}
+
+void ConfigMainWindow::showIntro(void)
+{
+       static const QString str = _("Welcome to the qconf graphical 
configuration tool.\n\n"
+               "For each option, a blank box indicates the feature is 
disabled, a check\n"
+               "indicates it is enabled, and a dot indicates that it is to be 
compiled\n"
+               "as a module.  Clicking on the box will cycle through the three 
states.\n\n"
+               "If you do not see an option (e.g., a device driver) that you 
believe\n"
+               "should be present, try turning on Show All Options under the 
Options menu.\n"
+               "Although there is no cross reference yet to help you figure 
out what other\n"
+               "options must be enabled to support the option you are 
interested in, you can\n"
+               "still view the help of a grayed-out option.\n\n"
+               "Toggling Show Debug Info under the Options menu will show the 
dependencies,\n"
+               "which you can then match by examining other options.\n\n");
+
+       QMessageBox::information(this, "qconf", str);
+}
+
+void ConfigMainWindow::showAbout(void)
+{
+       static const QString str = _("qconf is Copyright (C) 2002 Roman Zippel 
<zippel@xxxxxxxxxxxxxx>.\n\n"
+               "Bug reports and feature request can also be entered at 
http://bugzilla.kernel.org/\n";);
+
+       QMessageBox::information(this, "qconf", str);
+}
+
+void ConfigMainWindow::saveSettings(void)
+{
+       configSettings->writeEntry("/window x", pos().x());
+       configSettings->writeEntry("/window y", pos().y());
+       configSettings->writeEntry("/window width", size().width());
+       configSettings->writeEntry("/window height", size().height());
+
+       QString entry;
+       switch(configList->mode) {
+       case singleMode :
+               entry = "single";
+               break;
+
+       case symbolMode :
+               entry = "split";
+               break;
+
+       case fullMode :
+               entry = "full";
+               break;
+
+       default:
+               break;
+       }
+       configSettings->writeEntry("/listMode", entry);
+
+       configSettings->writeSizes("/split1", split1->sizes());
+       configSettings->writeSizes("/split2", split2->sizes());
+}
+
+void ConfigMainWindow::conf_changed(void)
+{
+       if (saveAction)
+               saveAction->setEnabled(conf_get_changed());
+}
+
+void fixup_rootmenu(struct menu *menu)
+{
+       struct menu *child;
+       static int menu_cnt = 0;
+
+       menu->flags |= MENU_ROOT;
+       for (child = menu->list; child; child = child->next) {
+               if (child->prompt && child->prompt->type == P_MENU) {
+                       menu_cnt++;
+                       fixup_rootmenu(child);
+                       menu_cnt--;
+               } else if (!menu_cnt)
+                       fixup_rootmenu(child);
+       }
+}
+
+static const char *progname;
+
+static void usage(void)
+{
+       printf(_("%s [-s] <config>\n"), progname);
+       exit(0);
+}
+
+int main(int ac, char** av)
+{
+       ConfigMainWindow* v;
+       const char *name;
+
+       bindtextdomain(PACKAGE, LOCALEDIR);
+       textdomain(PACKAGE);
+
+       progname = av[0];
+       configApp = new QApplication(ac, av);
+       if (ac > 1 && av[1][0] == '-') {
+               switch (av[1][1]) {
+               case 's':
+                       conf_set_message_callback(NULL);
+                       break;
+               case 'h':
+               case '?':
+                       usage();
+               }
+               name = av[2];
+       } else
+               name = av[1];
+       if (!name)
+               usage();
+
+       conf_parse(name);
+       fixup_rootmenu(&rootmenu);
+       conf_read(NULL);
+       //zconfdump(stdout);
+
+       configSettings = new ConfigSettings();
+       configSettings->beginGroup("/kconfig/qconf");
+       v = new ConfigMainWindow();
+
+       //zconfdump(stdout);
+       configApp->setMainWidget(v);
+       configApp->connect(configApp, SIGNAL(lastWindowClosed()), SLOT(quit()));
+       configApp->connect(configApp, SIGNAL(aboutToQuit()), v, 
SLOT(saveSettings()));
+       v->show();
+       configApp->exec();
+
+       configSettings->endGroup();
+       delete configSettings;
+
+       return 0;
+}
diff --git a/xen/tools/kconfig/qconf.h b/xen/tools/kconfig/qconf.h
new file mode 100644
index 0000000..bde0c6b
--- /dev/null
+++ b/xen/tools/kconfig/qconf.h
@@ -0,0 +1,338 @@
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@xxxxxxxxxxxxxx>
+ * Released under the terms of the GNU GPL v2.0.
+ */
+
+#if QT_VERSION < 0x040000
+#include <qlistview.h>
+#else
+#include <q3listview.h>
+#endif
+#include <qsettings.h>
+
+#if QT_VERSION < 0x040000
+#define Q3ValueList             QValueList
+#define Q3PopupMenu             QPopupMenu
+#define Q3ListView              QListView
+#define Q3ListViewItem          QListViewItem
+#define Q3VBox                  QVBox
+#define Q3TextBrowser           QTextBrowser
+#define Q3MainWindow            QMainWindow
+#define Q3Action                QAction
+#define Q3ToolBar               QToolBar
+#define Q3ListViewItemIterator  QListViewItemIterator
+#define Q3FileDialog            QFileDialog
+#endif
+
+class ConfigView;
+class ConfigList;
+class ConfigItem;
+class ConfigLineEdit;
+class ConfigMainWindow;
+
+class ConfigSettings : public QSettings {
+public:
+       ConfigSettings();
+       Q3ValueList<int> readSizes(const QString& key, bool *ok);
+       bool writeSizes(const QString& key, const Q3ValueList<int>& value);
+};
+
+enum colIdx {
+       promptColIdx, nameColIdx, noColIdx, modColIdx, yesColIdx, dataColIdx, 
colNr
+};
+enum listMode {
+       singleMode, menuMode, symbolMode, fullMode, listMode
+};
+enum optionMode {
+       normalOpt = 0, allOpt, promptOpt
+};
+
+class ConfigList : public Q3ListView {
+       Q_OBJECT
+       typedef class Q3ListView Parent;
+public:
+       ConfigList(ConfigView* p, const char *name = 0);
+       void reinit(void);
+       ConfigView* parent(void) const
+       {
+               return (ConfigView*)Parent::parent();
+       }
+       ConfigItem* findConfigItem(struct menu *);
+
+protected:
+       void keyPressEvent(QKeyEvent *e);
+       void contentsMousePressEvent(QMouseEvent *e);
+       void contentsMouseReleaseEvent(QMouseEvent *e);
+       void contentsMouseMoveEvent(QMouseEvent *e);
+       void contentsMouseDoubleClickEvent(QMouseEvent *e);
+       void focusInEvent(QFocusEvent *e);
+       void contextMenuEvent(QContextMenuEvent *e);
+
+public slots:
+       void setRootMenu(struct menu *menu);
+
+       void updateList(ConfigItem *item);
+       void setValue(ConfigItem* item, tristate val);
+       void changeValue(ConfigItem* item);
+       void updateSelection(void);
+       void saveSettings(void);
+signals:
+       void menuChanged(struct menu *menu);
+       void menuSelected(struct menu *menu);
+       void parentSelected(void);
+       void gotFocus(struct menu *);
+
+public:
+       void updateListAll(void)
+       {
+               updateAll = true;
+               updateList(NULL);
+               updateAll = false;
+       }
+       ConfigList* listView()
+       {
+               return this;
+       }
+       ConfigItem* firstChild() const
+       {
+               return (ConfigItem *)Parent::firstChild();
+       }
+       int mapIdx(colIdx idx)
+       {
+               return colMap[idx];
+       }
+       void addColumn(colIdx idx, const QString& label)
+       {
+               colMap[idx] = Parent::addColumn(label);
+               colRevMap[colMap[idx]] = idx;
+       }
+       void removeColumn(colIdx idx)
+       {
+               int col = colMap[idx];
+               if (col >= 0) {
+                       Parent::removeColumn(col);
+                       colRevMap[col] = colMap[idx] = -1;
+               }
+       }
+       void setAllOpen(bool open);
+       void setParentMenu(void);
+
+       bool menuSkip(struct menu *);
+
+       template <class P>
+       void updateMenuList(P*, struct menu*);
+
+       bool updateAll;
+
+       QPixmap symbolYesPix, symbolModPix, symbolNoPix;
+       QPixmap choiceYesPix, choiceNoPix;
+       QPixmap menuPix, menuInvPix, menuBackPix, voidPix;
+
+       bool showName, showRange, showData;
+       enum listMode mode;
+       enum optionMode optMode;
+       struct menu *rootEntry;
+       QColorGroup disabledColorGroup;
+       QColorGroup inactivedColorGroup;
+       Q3PopupMenu* headerPopup;
+
+private:
+       int colMap[colNr];
+       int colRevMap[colNr];
+};
+
+class ConfigItem : public Q3ListViewItem {
+       typedef class Q3ListViewItem Parent;
+public:
+       ConfigItem(Q3ListView *parent, ConfigItem *after, struct menu *m, bool 
v)
+       : Parent(parent, after), menu(m), visible(v), goParent(false)
+       {
+               init();
+       }
+       ConfigItem(ConfigItem *parent, ConfigItem *after, struct menu *m, bool 
v)
+       : Parent(parent, after), menu(m), visible(v), goParent(false)
+       {
+               init();
+       }
+       ConfigItem(Q3ListView *parent, ConfigItem *after, bool v)
+       : Parent(parent, after), menu(0), visible(v), goParent(true)
+       {
+               init();
+       }
+       ~ConfigItem(void);
+       void init(void);
+       void okRename(int col);
+       void updateMenu(void);
+       void testUpdateMenu(bool v);
+       ConfigList* listView() const
+       {
+               return (ConfigList*)Parent::listView();
+       }
+       ConfigItem* firstChild() const
+       {
+               return (ConfigItem *)Parent::firstChild();
+       }
+       ConfigItem* nextSibling() const
+       {
+               return (ConfigItem *)Parent::nextSibling();
+       }
+       void setText(colIdx idx, const QString& text)
+       {
+               Parent::setText(listView()->mapIdx(idx), text);
+       }
+       QString text(colIdx idx) const
+       {
+               return Parent::text(listView()->mapIdx(idx));
+       }
+       void setPixmap(colIdx idx, const QPixmap& pm)
+       {
+               Parent::setPixmap(listView()->mapIdx(idx), pm);
+       }
+       const QPixmap* pixmap(colIdx idx) const
+       {
+               return Parent::pixmap(listView()->mapIdx(idx));
+       }
+       void paintCell(QPainter* p, const QColorGroup& cg, int column, int 
width, int align);
+
+       ConfigItem* nextItem;
+       struct menu *menu;
+       bool visible;
+       bool goParent;
+};
+
+class ConfigLineEdit : public QLineEdit {
+       Q_OBJECT
+       typedef class QLineEdit Parent;
+public:
+       ConfigLineEdit(ConfigView* parent);
+       ConfigView* parent(void) const
+       {
+               return (ConfigView*)Parent::parent();
+       }
+       void show(ConfigItem *i);
+       void keyPressEvent(QKeyEvent *e);
+
+public:
+       ConfigItem *item;
+};
+
+class ConfigView : public Q3VBox {
+       Q_OBJECT
+       typedef class Q3VBox Parent;
+public:
+       ConfigView(QWidget* parent, const char *name = 0);
+       ~ConfigView(void);
+       static void updateList(ConfigItem* item);
+       static void updateListAll(void);
+
+       bool showName(void) const { return list->showName; }
+       bool showRange(void) const { return list->showRange; }
+       bool showData(void) const { return list->showData; }
+public slots:
+       void setShowName(bool);
+       void setShowRange(bool);
+       void setShowData(bool);
+       void setOptionMode(QAction *);
+signals:
+       void showNameChanged(bool);
+       void showRangeChanged(bool);
+       void showDataChanged(bool);
+public:
+       ConfigList* list;
+       ConfigLineEdit* lineEdit;
+
+       static ConfigView* viewList;
+       ConfigView* nextView;
+
+       static QAction *showNormalAction;
+       static QAction *showAllAction;
+       static QAction *showPromptAction;
+};
+
+class ConfigInfoView : public Q3TextBrowser {
+       Q_OBJECT
+       typedef class Q3TextBrowser Parent;
+public:
+       ConfigInfoView(QWidget* parent, const char *name = 0);
+       bool showDebug(void) const { return _showDebug; }
+
+public slots:
+       void setInfo(struct menu *menu);
+       void saveSettings(void);
+       void setShowDebug(bool);
+
+signals:
+       void showDebugChanged(bool);
+       void menuSelected(struct menu *);
+
+protected:
+       void symbolInfo(void);
+       void menuInfo(void);
+       QString debug_info(struct symbol *sym);
+       static QString print_filter(const QString &str);
+       static void expr_print_help(void *data, struct symbol *sym, const char 
*str);
+       Q3PopupMenu* createPopupMenu(const QPoint& pos);
+       void contentsContextMenuEvent(QContextMenuEvent *e);
+
+       struct symbol *sym;
+       struct menu *_menu;
+       bool _showDebug;
+};
+
+class ConfigSearchWindow : public QDialog {
+       Q_OBJECT
+       typedef class QDialog Parent;
+public:
+       ConfigSearchWindow(ConfigMainWindow* parent, const char *name = 0);
+
+public slots:
+       void saveSettings(void);
+       void search(void);
+
+protected:
+       QLineEdit* editField;
+       QPushButton* searchButton;
+       QSplitter* split;
+       ConfigView* list;
+       ConfigInfoView* info;
+
+       struct symbol **result;
+};
+
+class ConfigMainWindow : public Q3MainWindow {
+       Q_OBJECT
+
+       static Q3Action *saveAction;
+       static void conf_changed(void);
+public:
+       ConfigMainWindow(void);
+public slots:
+       void changeMenu(struct menu *);
+       void setMenuLink(struct menu *);
+       void listFocusChanged(void);
+       void goBack(void);
+       void loadConfig(void);
+       bool saveConfig(void);
+       void saveConfigAs(void);
+       void searchConfig(void);
+       void showSingleView(void);
+       void showSplitView(void);
+       void showFullView(void);
+       void showIntro(void);
+       void showAbout(void);
+       void saveSettings(void);
+
+protected:
+       void closeEvent(QCloseEvent *e);
+
+       ConfigSearchWindow *searchWindow;
+       ConfigView *menuView;
+       ConfigList *menuList;
+       ConfigView *configView;
+       ConfigList *configList;
+       ConfigInfoView *helpText;
+       Q3ToolBar *toolBar;
+       Q3Action *backAction;
+       QSplitter* split1;
+       QSplitter* split2;
+};
diff --git a/xen/tools/kconfig/streamline_config.pl 
b/xen/tools/kconfig/streamline_config.pl
new file mode 100755
index 0000000..f3d3fb4
--- /dev/null
+++ b/xen/tools/kconfig/streamline_config.pl
@@ -0,0 +1,647 @@
+#!/usr/bin/perl -w
+#
+# Copyright 2005-2009 - Steven Rostedt
+# Licensed under the terms of the GNU GPL License version 2
+#
+#  It's simple enough to figure out how this works.
+#  If not, then you can ask me at stripconfig@xxxxxxxxxxx
+#
+# What it does?
+#
+#   If you have installed a Linux kernel from a distribution
+#   that turns on way too many modules than you need, and
+#   you only want the modules you use, then this program
+#   is perfect for you.
+#
+#   It gives you the ability to turn off all the modules that are
+#   not loaded on your system.
+#
+# Howto:
+#
+#  1. Boot up the kernel that you want to stream line the config on.
+#  2. Change directory to the directory holding the source of the
+#       kernel that you just booted.
+#  3. Copy the configuraton file to this directory as .config
+#  4. Have all your devices that you need modules for connected and
+#      operational (make sure that their corresponding modules are loaded)
+#  5. Run this script redirecting the output to some other file
+#       like config_strip.
+#  6. Back up your old config (if you want too).
+#  7. copy the config_strip file to .config
+#  8. Run "make oldconfig"
+#
+#  Now your kernel is ready to be built with only the modules that
+#  are loaded.
+#
+# Here's what I did with my Debian distribution.
+#
+#    cd /usr/src/linux-2.6.10
+#    cp /boot/config-2.6.10-1-686-smp .config
+#    ~/bin/streamline_config > config_strip
+#    mv .config config_sav
+#    mv config_strip .config
+#    make oldconfig
+#
+use strict;
+use Getopt::Long;
+
+# set the environment variable LOCALMODCONFIG_DEBUG to get
+# debug output.
+my $debugprint = 0;
+$debugprint = 1 if (defined($ENV{LOCALMODCONFIG_DEBUG}));
+
+sub dprint {
+    return if (!$debugprint);
+    print STDERR @_;
+}
+
+my $config = ".config";
+
+my $uname = `uname -r`;
+chomp $uname;
+
+my @searchconfigs = (
+       {
+           "file" => ".config",
+           "exec" => "cat",
+       },
+       {
+           "file" => "/proc/config.gz",
+           "exec" => "zcat",
+       },
+       {
+           "file" => "/boot/config-$uname",
+           "exec" => "cat",
+       },
+       {
+           "file" => "/boot/vmlinuz-$uname",
+           "exec" => "scripts/extract-ikconfig",
+           "test" => "scripts/extract-ikconfig",
+       },
+       {
+           "file" => "vmlinux",
+           "exec" => "scripts/extract-ikconfig",
+           "test" => "scripts/extract-ikconfig",
+       },
+       {
+           "file" => "/lib/modules/$uname/kernel/kernel/configs.ko",
+           "exec" => "scripts/extract-ikconfig",
+           "test" => "scripts/extract-ikconfig",
+       },
+       {
+           "file" => "kernel/configs.ko",
+           "exec" => "scripts/extract-ikconfig",
+           "test" => "scripts/extract-ikconfig",
+       },
+       {
+           "file" => "kernel/configs.o",
+           "exec" => "scripts/extract-ikconfig",
+           "test" => "scripts/extract-ikconfig",
+       },
+);
+
+sub read_config {
+    foreach my $conf (@searchconfigs) {
+       my $file = $conf->{"file"};
+
+       next if ( ! -f "$file");
+
+       if (defined($conf->{"test"})) {
+           `$conf->{"test"} $conf->{"file"} 2>/dev/null`;
+           next if ($?);
+       }
+
+       my $exec = $conf->{"exec"};
+
+       print STDERR "using config: '$file'\n";
+
+       open(my $infile, '-|', "$exec $file") || die "Failed to run $exec 
$file";
+       my @x = <$infile>;
+       close $infile;
+       return @x;
+    }
+    die "No config file found";
+}
+
+my @config_file = read_config;
+
+# Parse options
+my $localmodconfig = 0;
+my $localyesconfig = 0;
+
+GetOptions("localmodconfig" => \$localmodconfig,
+          "localyesconfig" => \$localyesconfig);
+
+# Get the build source and top level Kconfig file (passed in)
+my $ksource = ($ARGV[0] ? $ARGV[0] : '.');
+my $kconfig = $ARGV[1];
+my $lsmod_file = $ENV{'LSMOD'};
+
+my @makefiles = `find $ksource -name Makefile -or -name Kbuild 2>/dev/null`;
+chomp @makefiles;
+
+my %depends;
+my %selects;
+my %prompts;
+my %objects;
+my $var;
+my $iflevel = 0;
+my @ifdeps;
+
+# prevent recursion
+my %read_kconfigs;
+
+sub read_kconfig {
+    my ($kconfig) = @_;
+
+    my $state = "NONE";
+    my $config;
+
+    my $cont = 0;
+    my $line;
+
+    my $source = "$ksource/$kconfig";
+    my $last_source = "";
+
+    # Check for any environment variables used
+    while ($source =~ /\$(\w+)/ && $last_source ne $source) {
+       my $env = $1;
+       $last_source = $source;
+       $source =~ s/\$$env/$ENV{$env}/;
+    }
+
+    open(my $kinfile, '<', $source) || die "Can't open $kconfig";
+    while (<$kinfile>) {
+       chomp;
+
+       # Make sure that lines ending with \ continue
+       if ($cont) {
+           $_ = $line . " " . $_;
+       }
+
+       if (s/\\$//) {
+           $cont = 1;
+           $line = $_;
+           next;
+       }
+
+       $cont = 0;
+
+       # collect any Kconfig sources
+       if (/^source\s*"(.*)"/) {
+           my $kconfig = $1;
+           # prevent reading twice.
+           if (!defined($read_kconfigs{$kconfig})) {
+               $read_kconfigs{$kconfig} = 1;
+               read_kconfig($kconfig);
+           }
+           next;
+       }
+
+       # configs found
+       if (/^\s*(menu)?config\s+(\S+)\s*$/) {
+           $state = "NEW";
+           $config = $2;
+
+           # Add depends for 'if' nesting
+           for (my $i = 0; $i < $iflevel; $i++) {
+               if ($i) {
+                   $depends{$config} .= " " . $ifdeps[$i];
+               } else {
+                   $depends{$config} = $ifdeps[$i];
+               }
+               $state = "DEP";
+           }
+
+       # collect the depends for the config
+       } elsif ($state eq "NEW" && /^\s*depends\s+on\s+(.*)$/) {
+           $state = "DEP";
+           $depends{$config} = $1;
+       } elsif ($state eq "DEP" && /^\s*depends\s+on\s+(.*)$/) {
+           $depends{$config} .= " " . $1;
+       } elsif ($state eq "DEP" && /^\s*def(_(bool|tristate)|ault)\s+(\S.*)$/) 
{
+           my $dep = $3;
+           if ($dep !~ /^\s*(y|m|n)\s*$/) {
+               $dep =~ s/.*\sif\s+//;
+               $depends{$config} .= " " . $dep;
+               dprint "Added default depends $dep to $config\n";
+           }
+
+       # Get the configs that select this config
+       } elsif ($state ne "NONE" && /^\s*select\s+(\S+)/) {
+           my $conf = $1;
+           if (defined($selects{$conf})) {
+               $selects{$conf} .= " " . $config;
+           } else {
+               $selects{$conf} = $config;
+           }
+
+       # configs without prompts must be selected
+       } elsif ($state ne "NONE" && /^\s*tristate\s\S/) {
+           # note if the config has a prompt
+           $prompts{$config} = 1;
+
+       # Check for if statements
+       } elsif (/^if\s+(.*\S)\s*$/) {
+           my $deps = $1;
+           # remove beginning and ending non text
+           $deps =~ s/^[^a-zA-Z0-9_]*//;
+           $deps =~ s/[^a-zA-Z0-9_]*$//;
+
+           my @deps = split /[^a-zA-Z0-9_]+/, $deps;
+
+           $ifdeps[$iflevel++] = join ':', @deps;
+
+       } elsif (/^endif/) {
+
+           $iflevel-- if ($iflevel);
+
+       # stop on "help"
+       } elsif (/^\s*help\s*$/) {
+           $state = "NONE";
+       }
+    }
+    close($kinfile);
+}
+
+if ($kconfig) {
+    read_kconfig($kconfig);
+}
+
+# Makefiles can use variables to define their dependencies
+sub convert_vars {
+    my ($line, %vars) = @_;
+
+    my $process = "";
+
+    while ($line =~ s/^(.*?)(\$\((.*?)\))//) {
+       my $start = $1;
+       my $variable = $2;
+       my $var = $3;
+
+       if (defined($vars{$var})) {
+           $process .= $start . $vars{$var};
+       } else {
+           $process .= $start . $variable;
+       }
+    }
+
+    $process .= $line;
+
+    return $process;
+}
+
+# Read all Makefiles to map the configs to the objects
+foreach my $makefile (@makefiles) {
+
+    my $line = "";
+    my %make_vars;
+
+    open(my $infile, '<', $makefile) || die "Can't open $makefile";
+    while (<$infile>) {
+       # if this line ends with a backslash, continue
+       chomp;
+       if (/^(.*)\\$/) {
+           $line .= $1;
+           next;
+       }
+
+       $line .= $_;
+       $_ = $line;
+       $line = "";
+
+       my $objs;
+
+       # Convert variables in a line (could define configs)
+       $_ = convert_vars($_, %make_vars);
+
+       # collect objects after obj-$(CONFIG_FOO_BAR)
+       if (/obj-\$\((CONFIG_[^\)]*)\)\s*[+:]?=\s*(.*)/) {
+           $var = $1;
+           $objs = $2;
+
+       # check if variables are set
+       } elsif (/^\s*(\S+)\s*[:]?=\s*(.*\S)/) {
+           $make_vars{$1} = $2;
+       }
+       if (defined($objs)) {
+           foreach my $obj (split /\s+/,$objs) {
+               $obj =~ s/-/_/g;
+               if ($obj =~ /(.*)\.o$/) {
+                   # Objects may be enabled by more than one config.
+                   # Store configs in an array.
+                   my @arr;
+
+                   if (defined($objects{$1})) {
+                       @arr = @{$objects{$1}};
+                   }
+
+                   $arr[$#arr+1] = $var;
+
+                   # The objects have a hash mapping to a reference
+                   # of an array of configs.
+                   $objects{$1} = \@arr;
+               }
+           }
+       }
+    }
+    close($infile);
+}
+
+my %modules;
+my $linfile;
+
+if (defined($lsmod_file)) {
+    if ( ! -f $lsmod_file) {
+       if ( -f $ENV{'objtree'}."/".$lsmod_file) {
+           $lsmod_file = $ENV{'objtree'}."/".$lsmod_file;
+       } else {
+               die "$lsmod_file not found";
+       }
+    }
+
+    my $otype = ( -x $lsmod_file) ? '-|' : '<';
+    open($linfile, $otype, $lsmod_file);
+
+} else {
+
+    # see what modules are loaded on this system
+    my $lsmod;
+
+    foreach my $dir ( ("/sbin", "/bin", "/usr/sbin", "/usr/bin") ) {
+       if ( -x "$dir/lsmod" ) {
+           $lsmod = "$dir/lsmod";
+           last;
+       }
+}
+    if (!defined($lsmod)) {
+       # try just the path
+       $lsmod = "lsmod";
+    }
+
+    open($linfile, '-|', $lsmod) || die "Can not call lsmod with $lsmod";
+}
+
+while (<$linfile>) {
+       next if (/^Module/);  # Skip the first line.
+       if (/^(\S+)/) {
+               $modules{$1} = 1;
+       }
+}
+close ($linfile);
+
+# add to the configs hash all configs that are needed to enable
+# a loaded module. This is a direct obj-${CONFIG_FOO} += bar.o
+# where we know we need bar.o so we add FOO to the list.
+my %configs;
+foreach my $module (keys(%modules)) {
+    if (defined($objects{$module})) {
+       my @arr = @{$objects{$module}};
+       foreach my $conf (@arr) {
+           $configs{$conf} = $module;
+           dprint "$conf added by direct ($module)\n";
+           if ($debugprint) {
+               my $c=$conf;
+               $c =~ s/^CONFIG_//;
+               if (defined($depends{$c})) {
+                   dprint " deps = $depends{$c}\n";
+               } else {
+                   dprint " no deps\n";
+               }
+           }
+       }
+    } else {
+       # Most likely, someone has a custom (binary?) module loaded.
+       print STDERR "$module config not found!!\n";
+    }
+}
+
+# Read the current config, and see what is enabled. We want to
+# ignore configs that we would not enable anyway.
+
+my %orig_configs;
+my $valid = "A-Za-z_0-9";
+
+foreach my $line (@config_file) {
+    $_ = $line;
+
+    if (/(CONFIG_[$valid]*)=(m|y)/) {
+       $orig_configs{$1} = $2;
+    }
+}
+
+my $repeat = 1;
+
+my $depconfig;
+
+#
+# Note, we do not care about operands (like: &&, ||, !) we want to add any
+# config that is in the depend list of another config. This script does
+# not enable configs that are not already enabled. If we come across a
+# config A that depends on !B, we can still add B to the list of depends
+# to keep on. If A was on in the original config, B would not have been
+# and B would not be turned on by this script.
+#
+sub parse_config_depends
+{
+    my ($p) = @_;
+
+    while ($p =~ /[$valid]/) {
+
+       if ($p =~ /^[^$valid]*([$valid]+)/) {
+           my $conf = "CONFIG_" . $1;
+
+           $p =~ s/^[^$valid]*[$valid]+//;
+
+           # We only need to process if the depend config is a module
+           if (!defined($orig_configs{$conf}) || !$orig_configs{conf} eq "m") {
+               next;
+           }
+
+           if (!defined($configs{$conf})) {
+               # We must make sure that this config has its
+               # dependencies met.
+               $repeat = 1; # do again
+               dprint "$conf selected by depend $depconfig\n";
+               $configs{$conf} = 1;
+           }
+       } else {
+           die "this should never happen";
+       }
+    }
+}
+
+# Select is treated a bit differently than depends. We call this
+# when a config has no prompt and requires another config to be
+# selected. We use to just select all configs that selected this
+# config, but found that that can balloon into enabling hundreds
+# of configs that we do not care about.
+#
+# The idea is we look at all the configs that select it. If one
+# is already in our list of configs to enable, then there's nothing
+# else to do. If there isn't, we pick the first config that was
+# enabled in the orignal config and use that.
+sub parse_config_selects
+{
+    my ($config, $p) = @_;
+
+    my $next_config;
+
+    while ($p =~ /[$valid]/) {
+
+       if ($p =~ /^[^$valid]*([$valid]+)/) {
+           my $conf = "CONFIG_" . $1;
+
+           $p =~ s/^[^$valid]*[$valid]+//;
+
+           # Make sure that this config exists in the current .config file
+           if (!defined($orig_configs{$conf})) {
+               dprint "$conf not set for $config select\n";
+               next;
+           }
+
+           # Check if something other than a module selects this config
+           if (defined($orig_configs{$conf}) && $orig_configs{$conf} ne "m") {
+               dprint "$conf (non module) selects config, we are good\n";
+               # we are good with this
+               return;
+           }
+           if (defined($configs{$conf})) {
+               dprint "$conf selects $config so we are good\n";
+               # A set config selects this config, we are good
+               return;
+           }
+           # Set this config to be selected
+           if (!defined($next_config)) {
+               $next_config = $conf;
+           }
+       } else {
+           die "this should never happen";
+       }
+    }
+
+    # If no possible config selected this, then something happened.
+    if (!defined($next_config)) {
+       print STDERR "WARNING: $config is required, but nothing in the\n";
+       print STDERR "  current config selects it.\n";
+       return;
+    }
+
+    # If we are here, then we found no config that is set and
+    # selects this config. Repeat.
+    $repeat = 1;
+    # Make this config need to be selected
+    $configs{$next_config} = 1;
+    dprint "$next_config selected by select $config\n";
+}
+
+my %process_selects;
+
+# loop through all configs, select their dependencies.
+sub loop_depend {
+    $repeat = 1;
+
+    while ($repeat) {
+       $repeat = 0;
+
+      forloop:
+       foreach my $config (keys %configs) {
+
+           # If this config is not a module, we do not need to process it
+           if (defined($orig_configs{$config}) && $orig_configs{$config} ne 
"m") {
+               next forloop;
+           }
+
+           $config =~ s/^CONFIG_//;
+           $depconfig = $config;
+
+           if (defined($depends{$config})) {
+               # This config has dependencies. Make sure they are also included
+               parse_config_depends $depends{$config};
+           }
+
+           # If the config has no prompt, then we need to check if a config
+           # that is enabled selected it. Or if we need to enable one.
+           if (!defined($prompts{$config}) && defined($selects{$config})) {
+               $process_selects{$config} = 1;
+           }
+       }
+    }
+}
+
+sub loop_select {
+
+    foreach my $config (keys %process_selects) {
+       $config =~ s/^CONFIG_//;
+
+       dprint "Process select $config\n";
+
+       # config has no prompt and must be selected.
+       parse_config_selects $config, $selects{$config};
+    }
+}
+
+while ($repeat) {
+    # Get the first set of configs and their dependencies.
+    loop_depend;
+
+    $repeat = 0;
+
+    # Now we need to see if we have to check selects;
+    loop_select;
+}
+
+my %setconfigs;
+
+# Finally, read the .config file and turn off any module enabled that
+# we could not find a reason to keep enabled.
+foreach my $line (@config_file) {
+    $_ = $line;
+
+    if (/CONFIG_IKCONFIG/) {
+       if (/# CONFIG_IKCONFIG is not set/) {
+           # enable IKCONFIG at least as a module
+           print "CONFIG_IKCONFIG=m\n";
+           # don't ask about PROC
+           print "# CONFIG_IKCONFIG_PROC is not set\n";
+       } else {
+           print;
+       }
+       next;
+    }
+
+    if (/^(CONFIG.*)=(m|y)/) {
+       if (defined($configs{$1})) {
+           if ($localyesconfig) {
+               $setconfigs{$1} = 'y';
+               print "$1=y\n";
+               next;
+           } else {
+               $setconfigs{$1} = $2;
+           }
+       } elsif ($2 eq "m") {
+           print "# $1 is not set\n";
+           next;
+       }
+    }
+    print;
+}
+
+# Integrity check, make sure all modules that we want enabled do
+# indeed have their configs set.
+loop:
+foreach my $module (keys(%modules)) {
+    if (defined($objects{$module})) {
+       my @arr = @{$objects{$module}};
+       foreach my $conf (@arr) {
+           if (defined($setconfigs{$conf})) {
+               next loop;
+           }
+       }
+       print STDERR "module $module did not have configs";
+       foreach my $conf (@arr) {
+           print STDERR " " , $conf;
+       }
+       print STDERR "\n";
+    }
+}
diff --git a/xen/tools/kconfig/symbol.c b/xen/tools/kconfig/symbol.c
new file mode 100644
index 0000000..50878dc
--- /dev/null
+++ b/xen/tools/kconfig/symbol.c
@@ -0,0 +1,1376 @@
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@xxxxxxxxxxxxxx>
+ * Released under the terms of the GNU GPL v2.0.
+ */
+
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+#include <regex.h>
+#include <sys/utsname.h>
+
+#include "lkc.h"
+
+struct symbol symbol_yes = {
+       .name = "y",
+       .curr = { "y", yes },
+       .flags = SYMBOL_CONST|SYMBOL_VALID,
+}, symbol_mod = {
+       .name = "m",
+       .curr = { "m", mod },
+       .flags = SYMBOL_CONST|SYMBOL_VALID,
+}, symbol_no = {
+       .name = "n",
+       .curr = { "n", no },
+       .flags = SYMBOL_CONST|SYMBOL_VALID,
+}, symbol_empty = {
+       .name = "",
+       .curr = { "", no },
+       .flags = SYMBOL_VALID,
+};
+
+struct symbol *sym_defconfig_list;
+struct symbol *modules_sym;
+tristate modules_val;
+
+struct expr *sym_env_list;
+
+static void sym_add_default(struct symbol *sym, const char *def)
+{
+       struct property *prop = prop_alloc(P_DEFAULT, sym);
+
+       prop->expr = expr_alloc_symbol(sym_lookup(def, SYMBOL_CONST));
+}
+
+void sym_init(void)
+{
+       struct symbol *sym;
+       struct utsname uts;
+       static bool inited = false;
+
+       if (inited)
+               return;
+       inited = true;
+
+       uname(&uts);
+
+       sym = sym_lookup("UNAME_RELEASE", 0);
+       sym->type = S_STRING;
+       sym->flags |= SYMBOL_AUTO;
+       sym_add_default(sym, uts.release);
+}
+
+enum symbol_type sym_get_type(struct symbol *sym)
+{
+       enum symbol_type type = sym->type;
+
+       if (type == S_TRISTATE) {
+               if (sym_is_choice_value(sym) && sym->visible == yes)
+                       type = S_BOOLEAN;
+               else if (modules_val == no)
+                       type = S_BOOLEAN;
+       }
+       return type;
+}
+
+const char *sym_type_name(enum symbol_type type)
+{
+       switch (type) {
+       case S_BOOLEAN:
+               return "boolean";
+       case S_TRISTATE:
+               return "tristate";
+       case S_INT:
+               return "integer";
+       case S_HEX:
+               return "hex";
+       case S_STRING:
+               return "string";
+       case S_UNKNOWN:
+               return "unknown";
+       case S_OTHER:
+               break;
+       }
+       return "???";
+}
+
+struct property *sym_get_choice_prop(struct symbol *sym)
+{
+       struct property *prop;
+
+       for_all_choices(sym, prop)
+               return prop;
+       return NULL;
+}
+
+struct property *sym_get_env_prop(struct symbol *sym)
+{
+       struct property *prop;
+
+       for_all_properties(sym, prop, P_ENV)
+               return prop;
+       return NULL;
+}
+
+static struct property *sym_get_default_prop(struct symbol *sym)
+{
+       struct property *prop;
+
+       for_all_defaults(sym, prop) {
+               prop->visible.tri = expr_calc_value(prop->visible.expr);
+               if (prop->visible.tri != no)
+                       return prop;
+       }
+       return NULL;
+}
+
+static struct property *sym_get_range_prop(struct symbol *sym)
+{
+       struct property *prop;
+
+       for_all_properties(sym, prop, P_RANGE) {
+               prop->visible.tri = expr_calc_value(prop->visible.expr);
+               if (prop->visible.tri != no)
+                       return prop;
+       }
+       return NULL;
+}
+
+static long long sym_get_range_val(struct symbol *sym, int base)
+{
+       sym_calc_value(sym);
+       switch (sym->type) {
+       case S_INT:
+               base = 10;
+               break;
+       case S_HEX:
+               base = 16;
+               break;
+       default:
+               break;
+       }
+       return strtoll(sym->curr.val, NULL, base);
+}
+
+static void sym_validate_range(struct symbol *sym)
+{
+       struct property *prop;
+       int base;
+       long long val, val2;
+       char str[64];
+
+       switch (sym->type) {
+       case S_INT:
+               base = 10;
+               break;
+       case S_HEX:
+               base = 16;
+               break;
+       default:
+               return;
+       }
+       prop = sym_get_range_prop(sym);
+       if (!prop)
+               return;
+       val = strtoll(sym->curr.val, NULL, base);
+       val2 = sym_get_range_val(prop->expr->left.sym, base);
+       if (val >= val2) {
+               val2 = sym_get_range_val(prop->expr->right.sym, base);
+               if (val <= val2)
+                       return;
+       }
+       if (sym->type == S_INT)
+               sprintf(str, "%lld", val2);
+       else
+               sprintf(str, "0x%llx", val2);
+       sym->curr.val = strdup(str);
+}
+
+static void sym_set_changed(struct symbol *sym)
+{
+       struct property *prop;
+
+       sym->flags |= SYMBOL_CHANGED;
+       for (prop = sym->prop; prop; prop = prop->next) {
+               if (prop->menu)
+                       prop->menu->flags |= MENU_CHANGED;
+       }
+}
+
+static void sym_set_all_changed(void)
+{
+       struct symbol *sym;
+       int i;
+
+       for_all_symbols(i, sym)
+               sym_set_changed(sym);
+}
+
+static void sym_calc_visibility(struct symbol *sym)
+{
+       struct property *prop;
+       tristate tri;
+
+       /* any prompt visible? */
+       tri = no;
+       for_all_prompts(sym, prop) {
+               prop->visible.tri = expr_calc_value(prop->visible.expr);
+               tri = EXPR_OR(tri, prop->visible.tri);
+       }
+       if (tri == mod && (sym->type != S_TRISTATE || modules_val == no))
+               tri = yes;
+       if (sym->visible != tri) {
+               sym->visible = tri;
+               sym_set_changed(sym);
+       }
+       if (sym_is_choice_value(sym))
+               return;
+       /* defaulting to "yes" if no explicit "depends on" are given */
+       tri = yes;
+       if (sym->dir_dep.expr)
+               tri = expr_calc_value(sym->dir_dep.expr);
+       if (tri == mod)
+               tri = yes;
+       if (sym->dir_dep.tri != tri) {
+               sym->dir_dep.tri = tri;
+               sym_set_changed(sym);
+       }
+       tri = no;
+       if (sym->rev_dep.expr)
+               tri = expr_calc_value(sym->rev_dep.expr);
+       if (tri == mod && sym_get_type(sym) == S_BOOLEAN)
+               tri = yes;
+       if (sym->rev_dep.tri != tri) {
+               sym->rev_dep.tri = tri;
+               sym_set_changed(sym);
+       }
+}
+
+/*
+ * Find the default symbol for a choice.
+ * First try the default values for the choice symbol
+ * Next locate the first visible choice value
+ * Return NULL if none was found
+ */
+struct symbol *sym_choice_default(struct symbol *sym)
+{
+       struct symbol *def_sym;
+       struct property *prop;
+       struct expr *e;
+
+       /* any of the defaults visible? */
+       for_all_defaults(sym, prop) {
+               prop->visible.tri = expr_calc_value(prop->visible.expr);
+               if (prop->visible.tri == no)
+                       continue;
+               def_sym = prop_get_symbol(prop);
+               if (def_sym->visible != no)
+                       return def_sym;
+       }
+
+       /* just get the first visible value */
+       prop = sym_get_choice_prop(sym);
+       expr_list_for_each_sym(prop->expr, e, def_sym)
+               if (def_sym->visible != no)
+                       return def_sym;
+
+       /* failed to locate any defaults */
+       return NULL;
+}
+
+static struct symbol *sym_calc_choice(struct symbol *sym)
+{
+       struct symbol *def_sym;
+       struct property *prop;
+       struct expr *e;
+       int flags;
+
+       /* first calculate all choice values' visibilities */
+       flags = sym->flags;
+       prop = sym_get_choice_prop(sym);
+       expr_list_for_each_sym(prop->expr, e, def_sym) {
+               sym_calc_visibility(def_sym);
+               if (def_sym->visible != no)
+                       flags &= def_sym->flags;
+       }
+
+       sym->flags &= flags | ~SYMBOL_DEF_USER;
+
+       /* is the user choice visible? */
+       def_sym = sym->def[S_DEF_USER].val;
+       if (def_sym && def_sym->visible != no)
+               return def_sym;
+
+       def_sym = sym_choice_default(sym);
+
+       if (def_sym == NULL)
+               /* no choice? reset tristate value */
+               sym->curr.tri = no;
+
+       return def_sym;
+}
+
+void sym_calc_value(struct symbol *sym)
+{
+       struct symbol_value newval, oldval;
+       struct property *prop;
+       struct expr *e;
+
+       if (!sym)
+               return;
+
+       if (sym->flags & SYMBOL_VALID)
+               return;
+
+       if (sym_is_choice_value(sym) &&
+           sym->flags & SYMBOL_NEED_SET_CHOICE_VALUES) {
+               sym->flags &= ~SYMBOL_NEED_SET_CHOICE_VALUES;
+               prop = sym_get_choice_prop(sym);
+               sym_calc_value(prop_get_symbol(prop));
+       }
+
+       sym->flags |= SYMBOL_VALID;
+
+       oldval = sym->curr;
+
+       switch (sym->type) {
+       case S_INT:
+       case S_HEX:
+       case S_STRING:
+               newval = symbol_empty.curr;
+               break;
+       case S_BOOLEAN:
+       case S_TRISTATE:
+               newval = symbol_no.curr;
+               break;
+       default:
+               sym->curr.val = sym->name;
+               sym->curr.tri = no;
+               return;
+       }
+       if (!sym_is_choice_value(sym))
+               sym->flags &= ~SYMBOL_WRITE;
+
+       sym_calc_visibility(sym);
+
+       /* set default if recursively called */
+       sym->curr = newval;
+
+       switch (sym_get_type(sym)) {
+       case S_BOOLEAN:
+       case S_TRISTATE:
+               if (sym_is_choice_value(sym) && sym->visible == yes) {
+                       prop = sym_get_choice_prop(sym);
+                       newval.tri = (prop_get_symbol(prop)->curr.val == sym) ? 
yes : no;
+               } else {
+                       if (sym->visible != no) {
+                               /* if the symbol is visible use the user value
+                                * if available, otherwise try the default value
+                                */
+                               sym->flags |= SYMBOL_WRITE;
+                               if (sym_has_value(sym)) {
+                                       newval.tri = 
EXPR_AND(sym->def[S_DEF_USER].tri,
+                                                             sym->visible);
+                                       goto calc_newval;
+                               }
+                       }
+                       if (sym->rev_dep.tri != no)
+                               sym->flags |= SYMBOL_WRITE;
+                       if (!sym_is_choice(sym)) {
+                               prop = sym_get_default_prop(sym);
+                               if (prop) {
+                                       sym->flags |= SYMBOL_WRITE;
+                                       newval.tri = 
EXPR_AND(expr_calc_value(prop->expr),
+                                                             
prop->visible.tri);
+                               }
+                       }
+               calc_newval:
+                       if (sym->dir_dep.tri == no && sym->rev_dep.tri != no) {
+                               struct expr *e;
+                               e = expr_simplify_unmet_dep(sym->rev_dep.expr,
+                                   sym->dir_dep.expr);
+                               fprintf(stderr, "warning: (");
+                               expr_fprint(e, stderr);
+                               fprintf(stderr, ") selects %s which has unmet 
direct dependencies (",
+                                       sym->name);
+                               expr_fprint(sym->dir_dep.expr, stderr);
+                               fprintf(stderr, ")\n");
+                               expr_free(e);
+                       }
+                       newval.tri = EXPR_OR(newval.tri, sym->rev_dep.tri);
+               }
+               if (newval.tri == mod && sym_get_type(sym) == S_BOOLEAN)
+                       newval.tri = yes;
+               break;
+       case S_STRING:
+       case S_HEX:
+       case S_INT:
+               if (sym->visible != no) {
+                       sym->flags |= SYMBOL_WRITE;
+                       if (sym_has_value(sym)) {
+                               newval.val = sym->def[S_DEF_USER].val;
+                               break;
+                       }
+               }
+               prop = sym_get_default_prop(sym);
+               if (prop) {
+                       struct symbol *ds = prop_get_symbol(prop);
+                       if (ds) {
+                               sym->flags |= SYMBOL_WRITE;
+                               sym_calc_value(ds);
+                               newval.val = ds->curr.val;
+                       }
+               }
+               break;
+       default:
+               ;
+       }
+
+       sym->curr = newval;
+       if (sym_is_choice(sym) && newval.tri == yes)
+               sym->curr.val = sym_calc_choice(sym);
+       sym_validate_range(sym);
+
+       if (memcmp(&oldval, &sym->curr, sizeof(oldval))) {
+               sym_set_changed(sym);
+               if (modules_sym == sym) {
+                       sym_set_all_changed();
+                       modules_val = modules_sym->curr.tri;
+               }
+       }
+
+       if (sym_is_choice(sym)) {
+               struct symbol *choice_sym;
+
+               prop = sym_get_choice_prop(sym);
+               expr_list_for_each_sym(prop->expr, e, choice_sym) {
+                       if ((sym->flags & SYMBOL_WRITE) &&
+                           choice_sym->visible != no)
+                               choice_sym->flags |= SYMBOL_WRITE;
+                       if (sym->flags & SYMBOL_CHANGED)
+                               sym_set_changed(choice_sym);
+               }
+       }
+
+       if (sym->flags & SYMBOL_AUTO)
+               sym->flags &= ~SYMBOL_WRITE;
+
+       if (sym->flags & SYMBOL_NEED_SET_CHOICE_VALUES)
+               set_all_choice_values(sym);
+}
+
+void sym_clear_all_valid(void)
+{
+       struct symbol *sym;
+       int i;
+
+       for_all_symbols(i, sym)
+               sym->flags &= ~SYMBOL_VALID;
+       sym_add_change_count(1);
+       sym_calc_value(modules_sym);
+}
+
+bool sym_tristate_within_range(struct symbol *sym, tristate val)
+{
+       int type = sym_get_type(sym);
+
+       if (sym->visible == no)
+               return false;
+
+       if (type != S_BOOLEAN && type != S_TRISTATE)
+               return false;
+
+       if (type == S_BOOLEAN && val == mod)
+               return false;
+       if (sym->visible <= sym->rev_dep.tri)
+               return false;
+       if (sym_is_choice_value(sym) && sym->visible == yes)
+               return val == yes;
+       return val >= sym->rev_dep.tri && val <= sym->visible;
+}
+
+bool sym_set_tristate_value(struct symbol *sym, tristate val)
+{
+       tristate oldval = sym_get_tristate_value(sym);
+
+       if (oldval != val && !sym_tristate_within_range(sym, val))
+               return false;
+
+       if (!(sym->flags & SYMBOL_DEF_USER)) {
+               sym->flags |= SYMBOL_DEF_USER;
+               sym_set_changed(sym);
+       }
+       /*
+        * setting a choice value also resets the new flag of the choice
+        * symbol and all other choice values.
+        */
+       if (sym_is_choice_value(sym) && val == yes) {
+               struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
+               struct property *prop;
+               struct expr *e;
+
+               cs->def[S_DEF_USER].val = sym;
+               cs->flags |= SYMBOL_DEF_USER;
+               prop = sym_get_choice_prop(cs);
+               for (e = prop->expr; e; e = e->left.expr) {
+                       if (e->right.sym->visible != no)
+                               e->right.sym->flags |= SYMBOL_DEF_USER;
+               }
+       }
+
+       sym->def[S_DEF_USER].tri = val;
+       if (oldval != val)
+               sym_clear_all_valid();
+
+       return true;
+}
+
+tristate sym_toggle_tristate_value(struct symbol *sym)
+{
+       tristate oldval, newval;
+
+       oldval = newval = sym_get_tristate_value(sym);
+       do {
+               switch (newval) {
+               case no:
+                       newval = mod;
+                       break;
+               case mod:
+                       newval = yes;
+                       break;
+               case yes:
+                       newval = no;
+                       break;
+               }
+               if (sym_set_tristate_value(sym, newval))
+                       break;
+       } while (oldval != newval);
+       return newval;
+}
+
+bool sym_string_valid(struct symbol *sym, const char *str)
+{
+       signed char ch;
+
+       switch (sym->type) {
+       case S_STRING:
+               return true;
+       case S_INT:
+               ch = *str++;
+               if (ch == '-')
+                       ch = *str++;
+               if (!isdigit(ch))
+                       return false;
+               if (ch == '0' && *str != 0)
+                       return false;
+               while ((ch = *str++)) {
+                       if (!isdigit(ch))
+                               return false;
+               }
+               return true;
+       case S_HEX:
+               if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X'))
+                       str += 2;
+               ch = *str++;
+               do {
+                       if (!isxdigit(ch))
+                               return false;
+               } while ((ch = *str++));
+               return true;
+       case S_BOOLEAN:
+       case S_TRISTATE:
+               switch (str[0]) {
+               case 'y': case 'Y':
+               case 'm': case 'M':
+               case 'n': case 'N':
+                       return true;
+               }
+               return false;
+       default:
+               return false;
+       }
+}
+
+bool sym_string_within_range(struct symbol *sym, const char *str)
+{
+       struct property *prop;
+       long long val;
+
+       switch (sym->type) {
+       case S_STRING:
+               return sym_string_valid(sym, str);
+       case S_INT:
+               if (!sym_string_valid(sym, str))
+                       return false;
+               prop = sym_get_range_prop(sym);
+               if (!prop)
+                       return true;
+               val = strtoll(str, NULL, 10);
+               return val >= sym_get_range_val(prop->expr->left.sym, 10) &&
+                      val <= sym_get_range_val(prop->expr->right.sym, 10);
+       case S_HEX:
+               if (!sym_string_valid(sym, str))
+                       return false;
+               prop = sym_get_range_prop(sym);
+               if (!prop)
+                       return true;
+               val = strtoll(str, NULL, 16);
+               return val >= sym_get_range_val(prop->expr->left.sym, 16) &&
+                      val <= sym_get_range_val(prop->expr->right.sym, 16);
+       case S_BOOLEAN:
+       case S_TRISTATE:
+               switch (str[0]) {
+               case 'y': case 'Y':
+                       return sym_tristate_within_range(sym, yes);
+               case 'm': case 'M':
+                       return sym_tristate_within_range(sym, mod);
+               case 'n': case 'N':
+                       return sym_tristate_within_range(sym, no);
+               }
+               return false;
+       default:
+               return false;
+       }
+}
+
+bool sym_set_string_value(struct symbol *sym, const char *newval)
+{
+       const char *oldval;
+       char *val;
+       int size;
+
+       switch (sym->type) {
+       case S_BOOLEAN:
+       case S_TRISTATE:
+               switch (newval[0]) {
+               case 'y': case 'Y':
+                       return sym_set_tristate_value(sym, yes);
+               case 'm': case 'M':
+                       return sym_set_tristate_value(sym, mod);
+               case 'n': case 'N':
+                       return sym_set_tristate_value(sym, no);
+               }
+               return false;
+       default:
+               ;
+       }
+
+       if (!sym_string_within_range(sym, newval))
+               return false;
+
+       if (!(sym->flags & SYMBOL_DEF_USER)) {
+               sym->flags |= SYMBOL_DEF_USER;
+               sym_set_changed(sym);
+       }
+
+       oldval = sym->def[S_DEF_USER].val;
+       size = strlen(newval) + 1;
+       if (sym->type == S_HEX && (newval[0] != '0' || (newval[1] != 'x' && 
newval[1] != 'X'))) {
+               size += 2;
+               sym->def[S_DEF_USER].val = val = xmalloc(size);
+               *val++ = '0';
+               *val++ = 'x';
+       } else if (!oldval || strcmp(oldval, newval))
+               sym->def[S_DEF_USER].val = val = xmalloc(size);
+       else
+               return true;
+
+       strcpy(val, newval);
+       free((void *)oldval);
+       sym_clear_all_valid();
+
+       return true;
+}
+
+/*
+ * Find the default value associated to a symbol.
+ * For tristate symbol handle the modules=n case
+ * in which case "m" becomes "y".
+ * If the symbol does not have any default then fallback
+ * to the fixed default values.
+ */
+const char *sym_get_string_default(struct symbol *sym)
+{
+       struct property *prop;
+       struct symbol *ds;
+       const char *str;
+       tristate val;
+
+       sym_calc_visibility(sym);
+       sym_calc_value(modules_sym);
+       val = symbol_no.curr.tri;
+       str = symbol_empty.curr.val;
+
+       /* If symbol has a default value look it up */
+       prop = sym_get_default_prop(sym);
+       if (prop != NULL) {
+               switch (sym->type) {
+               case S_BOOLEAN:
+               case S_TRISTATE:
+                       /* The visibility may limit the value from yes => mod */
+                       val = EXPR_AND(expr_calc_value(prop->expr), 
prop->visible.tri);
+                       break;
+               default:
+                       /*
+                        * The following fails to handle the situation
+                        * where a default value is further limited by
+                        * the valid range.
+                        */
+                       ds = prop_get_symbol(prop);
+                       if (ds != NULL) {
+                               sym_calc_value(ds);
+                               str = (const char *)ds->curr.val;
+                       }
+               }
+       }
+
+       /* Handle select statements */
+       val = EXPR_OR(val, sym->rev_dep.tri);
+
+       /* transpose mod to yes if modules are not enabled */
+       if (val == mod)
+               if (!sym_is_choice_value(sym) && modules_sym->curr.tri == no)
+                       val = yes;
+
+       /* transpose mod to yes if type is bool */
+       if (sym->type == S_BOOLEAN && val == mod)
+               val = yes;
+
+       switch (sym->type) {
+       case S_BOOLEAN:
+       case S_TRISTATE:
+               switch (val) {
+               case no: return "n";
+               case mod: return "m";
+               case yes: return "y";
+               }
+       case S_INT:
+       case S_HEX:
+               return str;
+       case S_STRING:
+               return str;
+       case S_OTHER:
+       case S_UNKNOWN:
+               break;
+       }
+       return "";
+}
+
+const char *sym_get_string_value(struct symbol *sym)
+{
+       tristate val;
+
+       switch (sym->type) {
+       case S_BOOLEAN:
+       case S_TRISTATE:
+               val = sym_get_tristate_value(sym);
+               switch (val) {
+               case no:
+                       return "n";
+               case mod:
+                       sym_calc_value(modules_sym);
+                       return (modules_sym->curr.tri == no) ? "n" : "m";
+               case yes:
+                       return "y";
+               }
+               break;
+       default:
+               ;
+       }
+       return (const char *)sym->curr.val;
+}
+
+bool sym_is_changable(struct symbol *sym)
+{
+       return sym->visible > sym->rev_dep.tri;
+}
+
+static unsigned strhash(const char *s)
+{
+       /* fnv32 hash */
+       unsigned hash = 2166136261U;
+       for (; *s; s++)
+               hash = (hash ^ *s) * 0x01000193;
+       return hash;
+}
+
+struct symbol *sym_lookup(const char *name, int flags)
+{
+       struct symbol *symbol;
+       char *new_name;
+       int hash;
+
+       if (name) {
+               if (name[0] && !name[1]) {
+                       switch (name[0]) {
+                       case 'y': return &symbol_yes;
+                       case 'm': return &symbol_mod;
+                       case 'n': return &symbol_no;
+                       }
+               }
+               hash = strhash(name) % SYMBOL_HASHSIZE;
+
+               for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) 
{
+                       if (symbol->name &&
+                           !strcmp(symbol->name, name) &&
+                           (flags ? symbol->flags & flags
+                                  : !(symbol->flags & 
(SYMBOL_CONST|SYMBOL_CHOICE))))
+                               return symbol;
+               }
+               new_name = strdup(name);
+       } else {
+               new_name = NULL;
+               hash = 0;
+       }
+
+       symbol = xmalloc(sizeof(*symbol));
+       memset(symbol, 0, sizeof(*symbol));
+       symbol->name = new_name;
+       symbol->type = S_UNKNOWN;
+       symbol->flags |= flags;
+
+       symbol->next = symbol_hash[hash];
+       symbol_hash[hash] = symbol;
+
+       return symbol;
+}
+
+struct symbol *sym_find(const char *name)
+{
+       struct symbol *symbol = NULL;
+       int hash = 0;
+
+       if (!name)
+               return NULL;
+
+       if (name[0] && !name[1]) {
+               switch (name[0]) {
+               case 'y': return &symbol_yes;
+               case 'm': return &symbol_mod;
+               case 'n': return &symbol_no;
+               }
+       }
+       hash = strhash(name) % SYMBOL_HASHSIZE;
+
+       for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
+               if (symbol->name &&
+                   !strcmp(symbol->name, name) &&
+                   !(symbol->flags & SYMBOL_CONST))
+                               break;
+       }
+
+       return symbol;
+}
+
+/*
+ * Expand symbol's names embedded in the string given in argument. Symbols'
+ * name to be expanded shall be prefixed by a '$'. Unknown symbol expands to
+ * the empty string.
+ */
+const char *sym_expand_string_value(const char *in)
+{
+       const char *src;
+       char *res;
+       size_t reslen;
+
+       reslen = strlen(in) + 1;
+       res = xmalloc(reslen);
+       res[0] = '\0';
+
+       while ((src = strchr(in, '$'))) {
+               char *p, name[SYMBOL_MAXLENGTH];
+               const char *symval = "";
+               struct symbol *sym;
+               size_t newlen;
+
+               strncat(res, in, src - in);
+               src++;
+
+               p = name;
+               while (isalnum(*src) || *src == '_')
+                       *p++ = *src++;
+               *p = '\0';
+
+               sym = sym_find(name);
+               if (sym != NULL) {
+                       sym_calc_value(sym);
+                       symval = sym_get_string_value(sym);
+               }
+
+               newlen = strlen(res) + strlen(symval) + strlen(src) + 1;
+               if (newlen > reslen) {
+                       reslen = newlen;
+                       res = realloc(res, reslen);
+               }
+
+               strcat(res, symval);
+               in = src;
+       }
+       strcat(res, in);
+
+       return res;
+}
+
+const char *sym_escape_string_value(const char *in)
+{
+       const char *p;
+       size_t reslen;
+       char *res;
+       size_t l;
+
+       reslen = strlen(in) + strlen("\"\"") + 1;
+
+       p = in;
+       for (;;) {
+               l = strcspn(p, "\"\\");
+               p += l;
+
+               if (p[0] == '\0')
+                       break;
+
+               reslen++;
+               p++;
+       }
+
+       res = xmalloc(reslen);
+       res[0] = '\0';
+
+       strcat(res, "\"");
+
+       p = in;
+       for (;;) {
+               l = strcspn(p, "\"\\");
+               strncat(res, p, l);
+               p += l;
+
+               if (p[0] == '\0')
+                       break;
+
+               strcat(res, "\\");
+               strncat(res, p++, 1);
+       }
+
+       strcat(res, "\"");
+       return res;
+}
+
+struct sym_match {
+       struct symbol   *sym;
+       off_t           so, eo;
+};
+
+/* Compare matched symbols as thus:
+ * - first, symbols that match exactly
+ * - then, alphabetical sort
+ */
+static int sym_rel_comp(const void *sym1, const void *sym2)
+{
+       const struct sym_match *s1 = sym1;
+       const struct sym_match *s2 = sym2;
+       int exact1, exact2;
+
+       /* Exact match:
+        * - if matched length on symbol s1 is the length of that symbol,
+        *   then this symbol should come first;
+        * - if matched length on symbol s2 is the length of that symbol,
+        *   then this symbol should come first.
+        * Note: since the search can be a regexp, both symbols may match
+        * exactly; if this is the case, we can't decide which comes first,
+        * and we fallback to sorting alphabetically.
+        */
+       exact1 = (s1->eo - s1->so) == strlen(s1->sym->name);
+       exact2 = (s2->eo - s2->so) == strlen(s2->sym->name);
+       if (exact1 && !exact2)
+               return -1;
+       if (!exact1 && exact2)
+               return 1;
+
+       /* As a fallback, sort symbols alphabetically */
+       return strcmp(s1->sym->name, s2->sym->name);
+}
+
+struct symbol **sym_re_search(const char *pattern)
+{
+       struct symbol *sym, **sym_arr = NULL;
+       struct sym_match *sym_match_arr = NULL;
+       int i, cnt, size;
+       regex_t re;
+       regmatch_t match[1];
+
+       cnt = size = 0;
+       /* Skip if empty */
+       if (strlen(pattern) == 0)
+               return NULL;
+       if (regcomp(&re, pattern, REG_EXTENDED|REG_ICASE))
+               return NULL;
+
+       for_all_symbols(i, sym) {
+               if (sym->flags & SYMBOL_CONST || !sym->name)
+                       continue;
+               if (regexec(&re, sym->name, 1, match, 0))
+                       continue;
+               if (cnt >= size) {
+                       void *tmp;
+                       size += 16;
+                       tmp = realloc(sym_match_arr, size * sizeof(struct 
sym_match));
+                       if (!tmp)
+                               goto sym_re_search_free;
+                       sym_match_arr = tmp;
+               }
+               sym_calc_value(sym);
+               /* As regexec returned 0, we know we have a match, so
+                * we can use match[0].rm_[se]o without further checks
+                */
+               sym_match_arr[cnt].so = match[0].rm_so;
+               sym_match_arr[cnt].eo = match[0].rm_eo;
+               sym_match_arr[cnt++].sym = sym;
+       }
+       if (sym_match_arr) {
+               qsort(sym_match_arr, cnt, sizeof(struct sym_match), 
sym_rel_comp);
+               sym_arr = malloc((cnt+1) * sizeof(struct symbol));
+               if (!sym_arr)
+                       goto sym_re_search_free;
+               for (i = 0; i < cnt; i++)
+                       sym_arr[i] = sym_match_arr[i].sym;
+               sym_arr[cnt] = NULL;
+       }
+sym_re_search_free:
+       /* sym_match_arr can be NULL if no match, but free(NULL) is OK */
+       free(sym_match_arr);
+       regfree(&re);
+
+       return sym_arr;
+}
+
+/*
+ * When we check for recursive dependencies we use a stack to save
+ * current state so we can print out relevant info to user.
+ * The entries are located on the call stack so no need to free memory.
+ * Note insert() remove() must always match to properly clear the stack.
+ */
+static struct dep_stack {
+       struct dep_stack *prev, *next;
+       struct symbol *sym;
+       struct property *prop;
+       struct expr *expr;
+} *check_top;
+
+static void dep_stack_insert(struct dep_stack *stack, struct symbol *sym)
+{
+       memset(stack, 0, sizeof(*stack));
+       if (check_top)
+               check_top->next = stack;
+       stack->prev = check_top;
+       stack->sym = sym;
+       check_top = stack;
+}
+
+static void dep_stack_remove(void)
+{
+       check_top = check_top->prev;
+       if (check_top)
+               check_top->next = NULL;
+}
+
+/*
+ * Called when we have detected a recursive dependency.
+ * check_top point to the top of the stact so we use
+ * the ->prev pointer to locate the bottom of the stack.
+ */
+static void sym_check_print_recursive(struct symbol *last_sym)
+{
+       struct dep_stack *stack;
+       struct symbol *sym, *next_sym;
+       struct menu *menu = NULL;
+       struct property *prop;
+       struct dep_stack cv_stack;
+
+       if (sym_is_choice_value(last_sym)) {
+               dep_stack_insert(&cv_stack, last_sym);
+               last_sym = prop_get_symbol(sym_get_choice_prop(last_sym));
+       }
+
+       for (stack = check_top; stack != NULL; stack = stack->prev)
+               if (stack->sym == last_sym)
+                       break;
+       if (!stack) {
+               fprintf(stderr, "unexpected recursive dependency error\n");
+               return;
+       }
+
+       for (; stack; stack = stack->next) {
+               sym = stack->sym;
+               next_sym = stack->next ? stack->next->sym : last_sym;
+               prop = stack->prop;
+               if (prop == NULL)
+                       prop = stack->sym->prop;
+
+               /* for choice values find the menu entry (used below) */
+               if (sym_is_choice(sym) || sym_is_choice_value(sym)) {
+                       for (prop = sym->prop; prop; prop = prop->next) {
+                               menu = prop->menu;
+                               if (prop->menu)
+                                       break;
+                       }
+               }
+               if (stack->sym == last_sym)
+                       fprintf(stderr, "%s:%d:error: recursive dependency 
detected!\n",
+                               prop->file->name, prop->lineno);
+               if (stack->expr) {
+                       fprintf(stderr, "%s:%d:\tsymbol %s %s value contains 
%s\n",
+                               prop->file->name, prop->lineno,
+                               sym->name ? sym->name : "<choice>",
+                               prop_get_type_name(prop->type),
+                               next_sym->name ? next_sym->name : "<choice>");
+               } else if (stack->prop) {
+                       fprintf(stderr, "%s:%d:\tsymbol %s depends on %s\n",
+                               prop->file->name, prop->lineno,
+                               sym->name ? sym->name : "<choice>",
+                               next_sym->name ? next_sym->name : "<choice>");
+               } else if (sym_is_choice(sym)) {
+                       fprintf(stderr, "%s:%d:\tchoice %s contains symbol 
%s\n",
+                               menu->file->name, menu->lineno,
+                               sym->name ? sym->name : "<choice>",
+                               next_sym->name ? next_sym->name : "<choice>");
+               } else if (sym_is_choice_value(sym)) {
+                       fprintf(stderr, "%s:%d:\tsymbol %s is part of choice 
%s\n",
+                               menu->file->name, menu->lineno,
+                               sym->name ? sym->name : "<choice>",
+                               next_sym->name ? next_sym->name : "<choice>");
+               } else {
+                       fprintf(stderr, "%s:%d:\tsymbol %s is selected by %s\n",
+                               prop->file->name, prop->lineno,
+                               sym->name ? sym->name : "<choice>",
+                               next_sym->name ? next_sym->name : "<choice>");
+               }
+       }
+
+       if (check_top == &cv_stack)
+               dep_stack_remove();
+}
+
+static struct symbol *sym_check_expr_deps(struct expr *e)
+{
+       struct symbol *sym;
+
+       if (!e)
+               return NULL;
+       switch (e->type) {
+       case E_OR:
+       case E_AND:
+               sym = sym_check_expr_deps(e->left.expr);
+               if (sym)
+                       return sym;
+               return sym_check_expr_deps(e->right.expr);
+       case E_NOT:
+               return sym_check_expr_deps(e->left.expr);
+       case E_EQUAL:
+       case E_GEQ:
+       case E_GTH:
+       case E_LEQ:
+       case E_LTH:
+       case E_UNEQUAL:
+               sym = sym_check_deps(e->left.sym);
+               if (sym)
+                       return sym;
+               return sym_check_deps(e->right.sym);
+       case E_SYMBOL:
+               return sym_check_deps(e->left.sym);
+       default:
+               break;
+       }
+       printf("Oops! How to check %d?\n", e->type);
+       return NULL;
+}
+
+/* return NULL when dependencies are OK */
+static struct symbol *sym_check_sym_deps(struct symbol *sym)
+{
+       struct symbol *sym2;
+       struct property *prop;
+       struct dep_stack stack;
+
+       dep_stack_insert(&stack, sym);
+
+       sym2 = sym_check_expr_deps(sym->rev_dep.expr);
+       if (sym2)
+               goto out;
+
+       for (prop = sym->prop; prop; prop = prop->next) {
+               if (prop->type == P_CHOICE || prop->type == P_SELECT)
+                       continue;
+               stack.prop = prop;
+               sym2 = sym_check_expr_deps(prop->visible.expr);
+               if (sym2)
+                       break;
+               if (prop->type != P_DEFAULT || sym_is_choice(sym))
+                       continue;
+               stack.expr = prop->expr;
+               sym2 = sym_check_expr_deps(prop->expr);
+               if (sym2)
+                       break;
+               stack.expr = NULL;
+       }
+
+out:
+       dep_stack_remove();
+
+       return sym2;
+}
+
+static struct symbol *sym_check_choice_deps(struct symbol *choice)
+{
+       struct symbol *sym, *sym2;
+       struct property *prop;
+       struct expr *e;
+       struct dep_stack stack;
+
+       dep_stack_insert(&stack, choice);
+
+       prop = sym_get_choice_prop(choice);
+       expr_list_for_each_sym(prop->expr, e, sym)
+               sym->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
+
+       choice->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
+       sym2 = sym_check_sym_deps(choice);
+       choice->flags &= ~SYMBOL_CHECK;
+       if (sym2)
+               goto out;
+
+       expr_list_for_each_sym(prop->expr, e, sym) {
+               sym2 = sym_check_sym_deps(sym);
+               if (sym2)
+                       break;
+       }
+out:
+       expr_list_for_each_sym(prop->expr, e, sym)
+               sym->flags &= ~SYMBOL_CHECK;
+
+       if (sym2 && sym_is_choice_value(sym2) &&
+           prop_get_symbol(sym_get_choice_prop(sym2)) == choice)
+               sym2 = choice;
+
+       dep_stack_remove();
+
+       return sym2;
+}
+
+struct symbol *sym_check_deps(struct symbol *sym)
+{
+       struct symbol *sym2;
+       struct property *prop;
+
+       if (sym->flags & SYMBOL_CHECK) {
+               sym_check_print_recursive(sym);
+               return sym;
+       }
+       if (sym->flags & SYMBOL_CHECKED)
+               return NULL;
+
+       if (sym_is_choice_value(sym)) {
+               struct dep_stack stack;
+
+               /* for choice groups start the check with main choice symbol */
+               dep_stack_insert(&stack, sym);
+               prop = sym_get_choice_prop(sym);
+               sym2 = sym_check_deps(prop_get_symbol(prop));
+               dep_stack_remove();
+       } else if (sym_is_choice(sym)) {
+               sym2 = sym_check_choice_deps(sym);
+       } else {
+               sym->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
+               sym2 = sym_check_sym_deps(sym);
+               sym->flags &= ~SYMBOL_CHECK;
+       }
+
+       if (sym2 && sym2 == sym)
+               sym2 = NULL;
+
+       return sym2;
+}
+
+struct property *prop_alloc(enum prop_type type, struct symbol *sym)
+{
+       struct property *prop;
+       struct property **propp;
+
+       prop = xmalloc(sizeof(*prop));
+       memset(prop, 0, sizeof(*prop));
+       prop->type = type;
+       prop->sym = sym;
+       prop->file = current_file;
+       prop->lineno = zconf_lineno();
+
+       /* append property to the prop list of symbol */
+       if (sym) {
+               for (propp = &sym->prop; *propp; propp = &(*propp)->next)
+                       ;
+               *propp = prop;
+       }
+
+       return prop;
+}
+
+struct symbol *prop_get_symbol(struct property *prop)
+{
+       if (prop->expr && (prop->expr->type == E_SYMBOL ||
+                          prop->expr->type == E_LIST))
+               return prop->expr->left.sym;
+       return NULL;
+}
+
+const char *prop_get_type_name(enum prop_type type)
+{
+       switch (type) {
+       case P_PROMPT:
+               return "prompt";
+       case P_ENV:
+               return "env";
+       case P_COMMENT:
+               return "comment";
+       case P_MENU:
+               return "menu";
+       case P_DEFAULT:
+               return "default";
+       case P_CHOICE:
+               return "choice";
+       case P_SELECT:
+               return "select";
+       case P_RANGE:
+               return "range";
+       case P_SYMBOL:
+               return "symbol";
+       case P_UNKNOWN:
+               break;
+       }
+       return "unknown";
+}
+
+static void prop_add_env(const char *env)
+{
+       struct symbol *sym, *sym2;
+       struct property *prop;
+       char *p;
+
+       sym = current_entry->sym;
+       sym->flags |= SYMBOL_AUTO;
+       for_all_properties(sym, prop, P_ENV) {
+               sym2 = prop_get_symbol(prop);
+               if (strcmp(sym2->name, env))
+                       menu_warn(current_entry, "redefining environment symbol 
from %s",
+                                 sym2->name);
+               return;
+       }
+
+       prop = prop_alloc(P_ENV, sym);
+       prop->expr = expr_alloc_symbol(sym_lookup(env, SYMBOL_CONST));
+
+       sym_env_list = expr_alloc_one(E_LIST, sym_env_list);
+       sym_env_list->right.sym = sym;
+
+       p = getenv(env);
+       if (p)
+               sym_add_default(sym, p);
+       else
+               menu_warn(current_entry, "environment variable %s undefined", 
env);
+}
diff --git a/xen/tools/kconfig/util.c b/xen/tools/kconfig/util.c
new file mode 100644
index 0000000..0e76042
--- /dev/null
+++ b/xen/tools/kconfig/util.c
@@ -0,0 +1,147 @@
+/*
+ * Copyright (C) 2002-2005 Roman Zippel <zippel@xxxxxxxxxxxxxx>
+ * Copyright (C) 2002-2005 Sam Ravnborg <sam@xxxxxxxxxxxx>
+ *
+ * Released under the terms of the GNU GPL v2.0.
+ */
+
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include "lkc.h"
+
+/* file already present in list? If not add it */
+struct file *file_lookup(const char *name)
+{
+       struct file *file;
+       const char *file_name = sym_expand_string_value(name);
+
+       for (file = file_list; file; file = file->next) {
+               if (!strcmp(name, file->name)) {
+                       free((void *)file_name);
+                       return file;
+               }
+       }
+
+       file = xmalloc(sizeof(*file));
+       memset(file, 0, sizeof(*file));
+       file->name = file_name;
+       file->next = file_list;
+       file_list = file;
+       return file;
+}
+
+/* write a dependency file as used by kbuild to track dependencies */
+int file_write_dep(const char *name)
+{
+       struct symbol *sym, *env_sym;
+       struct expr *e;
+       struct file *file;
+       FILE *out;
+
+       if (!name)
+               name = ".kconfig.d";
+       out = fopen("..config.tmp", "w");
+       if (!out)
+               return 1;
+       fprintf(out, "deps_config := \\\n");
+       for (file = file_list; file; file = file->next) {
+               if (file->next)
+                       fprintf(out, "\t%s \\\n", file->name);
+               else
+                       fprintf(out, "\t%s\n", file->name);
+       }
+       fprintf(out, "\n%s: \\\n"
+                    "\t$(deps_config)\n\n", conf_get_autoconfig_name());
+
+       expr_list_for_each_sym(sym_env_list, e, sym) {
+               struct property *prop;
+               const char *value;
+
+               prop = sym_get_env_prop(sym);
+               env_sym = prop_get_symbol(prop);
+               if (!env_sym)
+                       continue;
+               value = getenv(env_sym->name);
+               if (!value)
+                       value = "";
+               fprintf(out, "ifneq \"$(%s)\" \"%s\"\n", env_sym->name, value);
+               fprintf(out, "%s: FORCE\n", conf_get_autoconfig_name());
+               fprintf(out, "endif\n");
+       }
+
+       fprintf(out, "\n$(deps_config): ;\n");
+       fclose(out);
+       rename("..config.tmp", name);
+       return 0;
+}
+
+
+/* Allocate initial growable string */
+struct gstr str_new(void)
+{
+       struct gstr gs;
+       gs.s = xmalloc(sizeof(char) * 64);
+       gs.len = 64;
+       gs.max_width = 0;
+       strcpy(gs.s, "\0");
+       return gs;
+}
+
+/* Free storage for growable string */
+void str_free(struct gstr *gs)
+{
+       if (gs->s)
+               free(gs->s);
+       gs->s = NULL;
+       gs->len = 0;
+}
+
+/* Append to growable string */
+void str_append(struct gstr *gs, const char *s)
+{
+       size_t l;
+       if (s) {
+               l = strlen(gs->s) + strlen(s) + 1;
+               if (l > gs->len) {
+                       gs->s   = realloc(gs->s, l);
+                       gs->len = l;
+               }
+               strcat(gs->s, s);
+       }
+}
+
+/* Append printf formatted string to growable string */
+void str_printf(struct gstr *gs, const char *fmt, ...)
+{
+       va_list ap;
+       char s[10000]; /* big enough... */
+       va_start(ap, fmt);
+       vsnprintf(s, sizeof(s), fmt, ap);
+       str_append(gs, s);
+       va_end(ap);
+}
+
+/* Retrieve value of growable string */
+const char *str_get(struct gstr *gs)
+{
+       return gs->s;
+}
+
+void *xmalloc(size_t size)
+{
+       void *p = malloc(size);
+       if (p)
+               return p;
+       fprintf(stderr, "Out of memory.\n");
+       exit(1);
+}
+
+void *xcalloc(size_t nmemb, size_t size)
+{
+       void *p = calloc(nmemb, size);
+       if (p)
+               return p;
+       fprintf(stderr, "Out of memory.\n");
+       exit(1);
+}
diff --git a/xen/tools/kconfig/zconf.gperf b/xen/tools/kconfig/zconf.gperf
new file mode 100644
index 0000000..ac498f0
--- /dev/null
+++ b/xen/tools/kconfig/zconf.gperf
@@ -0,0 +1,49 @@
+%language=ANSI-C
+%define hash-function-name kconf_id_hash
+%define lookup-function-name kconf_id_lookup
+%define string-pool-name kconf_id_strings
+%compare-strncmp
+%enum
+%pic
+%struct-type
+
+struct kconf_id;
+
+static const struct kconf_id *kconf_id_lookup(register const char *str, 
register unsigned int len);
+
+%%
+mainmenu,      T_MAINMENU,     TF_COMMAND
+menu,          T_MENU,         TF_COMMAND
+endmenu,       T_ENDMENU,      TF_COMMAND
+source,                T_SOURCE,       TF_COMMAND
+choice,                T_CHOICE,       TF_COMMAND
+endchoice,     T_ENDCHOICE,    TF_COMMAND
+comment,       T_COMMENT,      TF_COMMAND
+config,                T_CONFIG,       TF_COMMAND
+menuconfig,    T_MENUCONFIG,   TF_COMMAND
+help,          T_HELP,         TF_COMMAND
+---help---,    T_HELP,         TF_COMMAND
+if,            T_IF,           TF_COMMAND|TF_PARAM
+endif,         T_ENDIF,        TF_COMMAND
+depends,       T_DEPENDS,      TF_COMMAND
+optional,      T_OPTIONAL,     TF_COMMAND
+default,       T_DEFAULT,      TF_COMMAND, S_UNKNOWN
+prompt,                T_PROMPT,       TF_COMMAND
+tristate,      T_TYPE,         TF_COMMAND, S_TRISTATE
+def_tristate,  T_DEFAULT,      TF_COMMAND, S_TRISTATE
+bool,          T_TYPE,         TF_COMMAND, S_BOOLEAN
+boolean,       T_TYPE,         TF_COMMAND, S_BOOLEAN
+def_bool,      T_DEFAULT,      TF_COMMAND, S_BOOLEAN
+int,           T_TYPE,         TF_COMMAND, S_INT
+hex,           T_TYPE,         TF_COMMAND, S_HEX
+string,                T_TYPE,         TF_COMMAND, S_STRING
+select,                T_SELECT,       TF_COMMAND
+range,         T_RANGE,        TF_COMMAND
+visible,       T_VISIBLE,      TF_COMMAND
+option,                T_OPTION,       TF_COMMAND
+on,            T_ON,           TF_PARAM
+modules,       T_OPT_MODULES,  TF_OPTION
+defconfig_list,        T_OPT_DEFCONFIG_LIST,TF_OPTION
+env,           T_OPT_ENV,      TF_OPTION
+allnoconfig_y, T_OPT_ALLNOCONFIG_Y,TF_OPTION
+%%
diff --git a/xen/tools/kconfig/zconf.hash.c_shipped 
b/xen/tools/kconfig/zconf.hash.c_shipped
new file mode 100644
index 0000000..360a62d
--- /dev/null
+++ b/xen/tools/kconfig/zconf.hash.c_shipped
@@ -0,0 +1,293 @@
+/* ANSI-C code produced by gperf version 3.0.4 */
+/* Command-line: gperf -t --output-file scripts/kconfig/zconf.hash.c_shipped 
-a -C -E -g -k '1,3,$' -p -t scripts/kconfig/zconf.gperf  */
+
+#if !((' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \
+      && ('%' == 37) && ('&' == 38) && ('\'' == 39) && ('(' == 40) \
+      && (')' == 41) && ('*' == 42) && ('+' == 43) && (',' == 44) \
+      && ('-' == 45) && ('.' == 46) && ('/' == 47) && ('0' == 48) \
+      && ('1' == 49) && ('2' == 50) && ('3' == 51) && ('4' == 52) \
+      && ('5' == 53) && ('6' == 54) && ('7' == 55) && ('8' == 56) \
+      && ('9' == 57) && (':' == 58) && (';' == 59) && ('<' == 60) \
+      && ('=' == 61) && ('>' == 62) && ('?' == 63) && ('A' == 65) \
+      && ('B' == 66) && ('C' == 67) && ('D' == 68) && ('E' == 69) \
+      && ('F' == 70) && ('G' == 71) && ('H' == 72) && ('I' == 73) \
+      && ('J' == 74) && ('K' == 75) && ('L' == 76) && ('M' == 77) \
+      && ('N' == 78) && ('O' == 79) && ('P' == 80) && ('Q' == 81) \
+      && ('R' == 82) && ('S' == 83) && ('T' == 84) && ('U' == 85) \
+      && ('V' == 86) && ('W' == 87) && ('X' == 88) && ('Y' == 89) \
+      && ('Z' == 90) && ('[' == 91) && ('\\' == 92) && (']' == 93) \
+      && ('^' == 94) && ('_' == 95) && ('a' == 97) && ('b' == 98) \
+      && ('c' == 99) && ('d' == 100) && ('e' == 101) && ('f' == 102) \
+      && ('g' == 103) && ('h' == 104) && ('i' == 105) && ('j' == 106) \
+      && ('k' == 107) && ('l' == 108) && ('m' == 109) && ('n' == 110) \
+      && ('o' == 111) && ('p' == 112) && ('q' == 113) && ('r' == 114) \
+      && ('s' == 115) && ('t' == 116) && ('u' == 117) && ('v' == 118) \
+      && ('w' == 119) && ('x' == 120) && ('y' == 121) && ('z' == 122) \
+      && ('{' == 123) && ('|' == 124) && ('}' == 125) && ('~' == 126))
+/* The character set is not based on ISO-646.  */
+#error "gperf generated tables don't work with this execution character set. 
Please report a bug to <bug-gnu-gperf@xxxxxxx>."
+#endif
+
+#line 10 "scripts/kconfig/zconf.gperf"
+struct kconf_id;
+
+static const struct kconf_id *kconf_id_lookup(register const char *str, 
register unsigned int len);
+/* maximum key range = 71, duplicates = 0 */
+
+#ifdef __GNUC__
+__inline
+#else
+#ifdef __cplusplus
+inline
+#endif
+#endif
+static unsigned int
+kconf_id_hash (register const char *str, register unsigned int len)
+{
+  static const unsigned char asso_values[] =
+    {
+      73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+      73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+      73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+      73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+      73, 73, 73, 73, 73,  0, 73, 73, 73, 73,
+      73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+      73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+      73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+      73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+      73, 73, 73, 73, 73, 73, 73,  5, 25, 25,
+       0,  0,  0,  5,  0,  0, 73, 73,  5,  0,
+      10,  5, 45, 73, 20, 20,  0, 15, 15, 73,
+      20,  5, 73, 73, 73, 73, 73, 73, 73, 73,
+      73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+      73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+      73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+      73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+      73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+      73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+      73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+      73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+      73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+      73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+      73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+      73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+      73, 73, 73, 73, 73, 73
+    };
+  register int hval = len;
+
+  switch (hval)
+    {
+      default:
+        hval += asso_values[(unsigned char)str[2]];
+      /*FALLTHROUGH*/
+      case 2:
+      case 1:
+        hval += asso_values[(unsigned char)str[0]];
+        break;
+    }
+  return hval + asso_values[(unsigned char)str[len - 1]];
+}
+
+struct kconf_id_strings_t
+  {
+    char kconf_id_strings_str2[sizeof("if")];
+    char kconf_id_strings_str3[sizeof("int")];
+    char kconf_id_strings_str5[sizeof("endif")];
+    char kconf_id_strings_str7[sizeof("default")];
+    char kconf_id_strings_str8[sizeof("tristate")];
+    char kconf_id_strings_str9[sizeof("endchoice")];
+    char kconf_id_strings_str10[sizeof("---help---")];
+    char kconf_id_strings_str12[sizeof("def_tristate")];
+    char kconf_id_strings_str13[sizeof("def_bool")];
+    char kconf_id_strings_str14[sizeof("defconfig_list")];
+    char kconf_id_strings_str17[sizeof("on")];
+    char kconf_id_strings_str18[sizeof("optional")];
+    char kconf_id_strings_str21[sizeof("option")];
+    char kconf_id_strings_str22[sizeof("endmenu")];
+    char kconf_id_strings_str23[sizeof("mainmenu")];
+    char kconf_id_strings_str25[sizeof("menuconfig")];
+    char kconf_id_strings_str27[sizeof("modules")];
+    char kconf_id_strings_str28[sizeof("allnoconfig_y")];
+    char kconf_id_strings_str29[sizeof("menu")];
+    char kconf_id_strings_str31[sizeof("select")];
+    char kconf_id_strings_str32[sizeof("comment")];
+    char kconf_id_strings_str33[sizeof("env")];
+    char kconf_id_strings_str35[sizeof("range")];
+    char kconf_id_strings_str36[sizeof("choice")];
+    char kconf_id_strings_str39[sizeof("bool")];
+    char kconf_id_strings_str41[sizeof("source")];
+    char kconf_id_strings_str42[sizeof("visible")];
+    char kconf_id_strings_str43[sizeof("hex")];
+    char kconf_id_strings_str46[sizeof("config")];
+    char kconf_id_strings_str47[sizeof("boolean")];
+    char kconf_id_strings_str51[sizeof("string")];
+    char kconf_id_strings_str54[sizeof("help")];
+    char kconf_id_strings_str56[sizeof("prompt")];
+    char kconf_id_strings_str72[sizeof("depends")];
+  };
+static const struct kconf_id_strings_t kconf_id_strings_contents =
+  {
+    "if",
+    "int",
+    "endif",
+    "default",
+    "tristate",
+    "endchoice",
+    "---help---",
+    "def_tristate",
+    "def_bool",
+    "defconfig_list",
+    "on",
+    "optional",
+    "option",
+    "endmenu",
+    "mainmenu",
+    "menuconfig",
+    "modules",
+    "allnoconfig_y",
+    "menu",
+    "select",
+    "comment",
+    "env",
+    "range",
+    "choice",
+    "bool",
+    "source",
+    "visible",
+    "hex",
+    "config",
+    "boolean",
+    "string",
+    "help",
+    "prompt",
+    "depends"
+  };
+#define kconf_id_strings ((const char *) &kconf_id_strings_contents)
+#ifdef __GNUC__
+__inline
+#if defined __GNUC_STDC_INLINE__ || defined __GNUC_GNU_INLINE__
+__attribute__ ((__gnu_inline__))
+#endif
+#endif
+const struct kconf_id *
+kconf_id_lookup (register const char *str, register unsigned int len)
+{
+  enum
+    {
+      TOTAL_KEYWORDS = 34,
+      MIN_WORD_LENGTH = 2,
+      MAX_WORD_LENGTH = 14,
+      MIN_HASH_VALUE = 2,
+      MAX_HASH_VALUE = 72
+    };
+
+  static const struct kconf_id wordlist[] =
+    {
+      {-1}, {-1},
+#line 26 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str2,    
        T_IF,           TF_COMMAND|TF_PARAM},
+#line 37 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str3,    
        T_TYPE,         TF_COMMAND, S_INT},
+      {-1},
+#line 27 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str5,    
        T_ENDIF,        TF_COMMAND},
+      {-1},
+#line 30 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str7,    
T_DEFAULT,      TF_COMMAND, S_UNKNOWN},
+#line 32 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str8,    
T_TYPE,         TF_COMMAND, S_TRISTATE},
+#line 20 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str9,    
T_ENDCHOICE,    TF_COMMAND},
+#line 25 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str10,   
T_HELP,         TF_COMMAND},
+      {-1},
+#line 33 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str12,   
T_DEFAULT,      TF_COMMAND, S_TRISTATE},
+#line 36 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str13,   
T_DEFAULT,      TF_COMMAND, S_BOOLEAN},
+#line 46 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str14,   
T_OPT_DEFCONFIG_LIST,TF_OPTION},
+      {-1}, {-1},
+#line 44 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str17,   
        T_ON,           TF_PARAM},
+#line 29 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str18,   
T_OPTIONAL,     TF_COMMAND},
+      {-1}, {-1},
+#line 43 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str21,   
        T_OPTION,       TF_COMMAND},
+#line 17 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str22,   
T_ENDMENU,      TF_COMMAND},
+#line 15 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str23,   
T_MAINMENU,     TF_COMMAND},
+      {-1},
+#line 23 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str25,   
T_MENUCONFIG,   TF_COMMAND},
+      {-1},
+#line 45 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str27,   
T_OPT_MODULES,  TF_OPTION},
+#line 48 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str28,   
T_OPT_ALLNOCONFIG_Y,TF_OPTION},
+#line 16 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str29,   
        T_MENU,         TF_COMMAND},
+      {-1},
+#line 40 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str31,   
        T_SELECT,       TF_COMMAND},
+#line 21 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str32,   
T_COMMENT,      TF_COMMAND},
+#line 47 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str33,   
        T_OPT_ENV,      TF_OPTION},
+      {-1},
+#line 41 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str35,   
        T_RANGE,        TF_COMMAND},
+#line 19 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str36,   
        T_CHOICE,       TF_COMMAND},
+      {-1}, {-1},
+#line 34 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str39,   
        T_TYPE,         TF_COMMAND, S_BOOLEAN},
+      {-1},
+#line 18 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str41,   
        T_SOURCE,       TF_COMMAND},
+#line 42 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str42,   
T_VISIBLE,      TF_COMMAND},
+#line 38 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str43,   
        T_TYPE,         TF_COMMAND, S_HEX},
+      {-1}, {-1},
+#line 22 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str46,   
        T_CONFIG,       TF_COMMAND},
+#line 35 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str47,   
T_TYPE,         TF_COMMAND, S_BOOLEAN},
+      {-1}, {-1}, {-1},
+#line 39 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str51,   
        T_TYPE,         TF_COMMAND, S_STRING},
+      {-1}, {-1},
+#line 24 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str54,   
        T_HELP,         TF_COMMAND},
+      {-1},
+#line 31 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str56,   
        T_PROMPT,       TF_COMMAND},
+      {-1}, {-1}, {-1}, {-1}, {-1}, {-1}, {-1}, {-1}, {-1},
+      {-1}, {-1}, {-1}, {-1}, {-1}, {-1},
+#line 28 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str72,   
T_DEPENDS,      TF_COMMAND}
+    };
+
+  if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH)
+    {
+      register int key = kconf_id_hash (str, len);
+
+      if (key <= MAX_HASH_VALUE && key >= 0)
+        {
+          register int o = wordlist[key].name;
+          if (o >= 0)
+            {
+              register const char *s = o + kconf_id_strings;
+
+              if (*str == *s && !strncmp (str + 1, s + 1, len - 1) && s[len] 
== '\0')
+                return &wordlist[key];
+            }
+        }
+    }
+  return 0;
+}
+#line 49 "scripts/kconfig/zconf.gperf"
+
diff --git a/xen/tools/kconfig/zconf.l b/xen/tools/kconfig/zconf.l
new file mode 100644
index 0000000..c410d25
--- /dev/null
+++ b/xen/tools/kconfig/zconf.l
@@ -0,0 +1,374 @@
+%option nostdinit noyywrap never-interactive full ecs
+%option 8bit nodefault perf-report perf-report
+%option noinput
+%x COMMAND HELP STRING PARAM
+%{
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@xxxxxxxxxxxxxx>
+ * Released under the terms of the GNU GPL v2.0.
+ */
+
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "lkc.h"
+
+#define START_STRSIZE  16
+
+static struct {
+       struct file *file;
+       int lineno;
+} current_pos;
+
+static char *text;
+static int text_size, text_asize;
+
+struct buffer {
+       struct buffer *parent;
+       YY_BUFFER_STATE state;
+};
+
+struct buffer *current_buf;
+
+static int last_ts, first_ts;
+
+static void zconf_endhelp(void);
+static void zconf_endfile(void);
+
+static void new_string(void)
+{
+       text = xmalloc(START_STRSIZE);
+       text_asize = START_STRSIZE;
+       text_size = 0;
+       *text = 0;
+}
+
+static void append_string(const char *str, int size)
+{
+       int new_size = text_size + size + 1;
+       if (new_size > text_asize) {
+               new_size += START_STRSIZE - 1;
+               new_size &= -START_STRSIZE;
+               text = realloc(text, new_size);
+               text_asize = new_size;
+       }
+       memcpy(text + text_size, str, size);
+       text_size += size;
+       text[text_size] = 0;
+}
+
+static void alloc_string(const char *str, int size)
+{
+       text = xmalloc(size + 1);
+       memcpy(text, str, size);
+       text[size] = 0;
+}
+
+static void warn_ignored_character(char chr)
+{
+       fprintf(stderr,
+               "%s:%d:warning: ignoring unsupported character '%c'\n",
+               zconf_curname(), zconf_lineno(), chr);
+}
+%}
+
+n      [A-Za-z0-9_-]
+
+%%
+       int str = 0;
+       int ts, i;
+
+[ \t]*#.*\n    |
+[ \t]*\n       {
+       current_file->lineno++;
+       return T_EOL;
+}
+[ \t]*#.*
+
+
+[ \t]+ {
+       BEGIN(COMMAND);
+}
+
+.      {
+       unput(yytext[0]);
+       BEGIN(COMMAND);
+}
+
+
+<COMMAND>{
+       {n}+    {
+               const struct kconf_id *id = kconf_id_lookup(yytext, yyleng);
+               BEGIN(PARAM);
+               current_pos.file = current_file;
+               current_pos.lineno = current_file->lineno;
+               if (id && id->flags & TF_COMMAND) {
+                       zconflval.id = id;
+                       return id->token;
+               }
+               alloc_string(yytext, yyleng);
+               zconflval.string = text;
+               return T_WORD;
+       }
+       .       warn_ignored_character(*yytext);
+       \n      {
+               BEGIN(INITIAL);
+               current_file->lineno++;
+               return T_EOL;
+       }
+}
+
+<PARAM>{
+       "&&"    return T_AND;
+       "||"    return T_OR;
+       "("     return T_OPEN_PAREN;
+       ")"     return T_CLOSE_PAREN;
+       "!"     return T_NOT;
+       "="     return T_EQUAL;
+       "!="    return T_UNEQUAL;
+       "<="    return T_LESS_EQUAL;
+       ">="    return T_GREATER_EQUAL;
+       "<"     return T_LESS;
+       ">"     return T_GREATER;
+       \"|\'   {
+               str = yytext[0];
+               new_string();
+               BEGIN(STRING);
+       }
+       \n      BEGIN(INITIAL); current_file->lineno++; return T_EOL;
+       ({n}|[/.])+     {
+               const struct kconf_id *id = kconf_id_lookup(yytext, yyleng);
+               if (id && id->flags & TF_PARAM) {
+                       zconflval.id = id;
+                       return id->token;
+               }
+               alloc_string(yytext, yyleng);
+               zconflval.string = text;
+               return T_WORD;
+       }
+       #.*     /* comment */
+       \\\n    current_file->lineno++;
+       [[:blank:]]+
+       .       warn_ignored_character(*yytext);
+       <<EOF>> {
+               BEGIN(INITIAL);
+       }
+}
+
+<STRING>{
+       [^'"\\\n]+/\n   {
+               append_string(yytext, yyleng);
+               zconflval.string = text;
+               return T_WORD_QUOTE;
+       }
+       [^'"\\\n]+      {
+               append_string(yytext, yyleng);
+       }
+       \\.?/\n {
+               append_string(yytext + 1, yyleng - 1);
+               zconflval.string = text;
+               return T_WORD_QUOTE;
+       }
+       \\.?    {
+               append_string(yytext + 1, yyleng - 1);
+       }
+       \'|\"   {
+               if (str == yytext[0]) {
+                       BEGIN(PARAM);
+                       zconflval.string = text;
+                       return T_WORD_QUOTE;
+               } else
+                       append_string(yytext, 1);
+       }
+       \n      {
+               printf("%s:%d:warning: multi-line strings not supported\n", 
zconf_curname(), zconf_lineno());
+               current_file->lineno++;
+               BEGIN(INITIAL);
+               return T_EOL;
+       }
+       <<EOF>> {
+               BEGIN(INITIAL);
+       }
+}
+
+<HELP>{
+       [ \t]+  {
+               ts = 0;
+               for (i = 0; i < yyleng; i++) {
+                       if (yytext[i] == '\t')
+                               ts = (ts & ~7) + 8;
+                       else
+                               ts++;
+               }
+               last_ts = ts;
+               if (first_ts) {
+                       if (ts < first_ts) {
+                               zconf_endhelp();
+                               return T_HELPTEXT;
+                       }
+                       ts -= first_ts;
+                       while (ts > 8) {
+                               append_string("        ", 8);
+                               ts -= 8;
+                       }
+                       append_string("        ", ts);
+               }
+       }
+       [ \t]*\n/[^ \t\n] {
+               current_file->lineno++;
+               zconf_endhelp();
+               return T_HELPTEXT;
+       }
+       [ \t]*\n        {
+               current_file->lineno++;
+               append_string("\n", 1);
+       }
+       [^ \t\n].* {
+               while (yyleng) {
+                       if ((yytext[yyleng-1] != ' ') && (yytext[yyleng-1] != 
'\t'))
+                               break;
+                       yyleng--;
+               }
+               append_string(yytext, yyleng);
+               if (!first_ts)
+                       first_ts = last_ts;
+       }
+       <<EOF>> {
+               zconf_endhelp();
+               return T_HELPTEXT;
+       }
+}
+
+<<EOF>>        {
+       if (current_file) {
+               zconf_endfile();
+               return T_EOL;
+       }
+       fclose(yyin);
+       yyterminate();
+}
+
+%%
+void zconf_starthelp(void)
+{
+       new_string();
+       last_ts = first_ts = 0;
+       BEGIN(HELP);
+}
+
+static void zconf_endhelp(void)
+{
+       zconflval.string = text;
+       BEGIN(INITIAL);
+}
+
+
+/*
+ * Try to open specified file with following names:
+ * ./name
+ * $(srctree)/name
+ * The latter is used when srctree is separate from objtree
+ * when compiling the kernel.
+ * Return NULL if file is not found.
+ */
+FILE *zconf_fopen(const char *name)
+{
+       char *env, fullname[PATH_MAX+1];
+       FILE *f;
+
+       f = fopen(name, "r");
+       if (!f && name != NULL && name[0] != '/') {
+               env = getenv(SRCTREE);
+               if (env) {
+                       sprintf(fullname, "%s/%s", env, name);
+                       f = fopen(fullname, "r");
+               }
+       }
+       return f;
+}
+
+void zconf_initscan(const char *name)
+{
+       yyin = zconf_fopen(name);
+       if (!yyin) {
+               printf("can't find file %s\n", name);
+               exit(1);
+       }
+
+       current_buf = xmalloc(sizeof(*current_buf));
+       memset(current_buf, 0, sizeof(*current_buf));
+
+       current_file = file_lookup(name);
+       current_file->lineno = 1;
+}
+
+void zconf_nextfile(const char *name)
+{
+       struct file *iter;
+       struct file *file = file_lookup(name);
+       struct buffer *buf = xmalloc(sizeof(*buf));
+       memset(buf, 0, sizeof(*buf));
+
+       current_buf->state = YY_CURRENT_BUFFER;
+       yyin = zconf_fopen(file->name);
+       if (!yyin) {
+               printf("%s:%d: can't open file \"%s\"\n",
+                   zconf_curname(), zconf_lineno(), file->name);
+               exit(1);
+       }
+       yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
+       buf->parent = current_buf;
+       current_buf = buf;
+
+       for (iter = current_file->parent; iter; iter = iter->parent ) {
+               if (!strcmp(current_file->name,iter->name) ) {
+                       printf("%s:%d: recursive inclusion detected. "
+                              "Inclusion path:\n  current file : '%s'\n",
+                              zconf_curname(), zconf_lineno(),
+                              zconf_curname());
+                       iter = current_file->parent;
+                       while (iter && \
+                              strcmp(iter->name,current_file->name)) {
+                               printf("  included from: '%s:%d'\n",
+                                      iter->name, iter->lineno-1);
+                               iter = iter->parent;
+                       }
+                       if (iter)
+                               printf("  included from: '%s:%d'\n",
+                                      iter->name, iter->lineno+1);
+                       exit(1);
+               }
+       }
+       file->lineno = 1;
+       file->parent = current_file;
+       current_file = file;
+}
+
+static void zconf_endfile(void)
+{
+       struct buffer *parent;
+
+       current_file = current_file->parent;
+
+       parent = current_buf->parent;
+       if (parent) {
+               fclose(yyin);
+               yy_delete_buffer(YY_CURRENT_BUFFER);
+               yy_switch_to_buffer(parent->state);
+       }
+       free(current_buf);
+       current_buf = parent;
+}
+
+int zconf_lineno(void)
+{
+       return current_pos.lineno;
+}
+
+const char *zconf_curname(void)
+{
+       return current_pos.file ? current_pos.file->name : "<none>";
+}
diff --git a/xen/tools/kconfig/zconf.lex.c_shipped 
b/xen/tools/kconfig/zconf.lex.c_shipped
new file mode 100644
index 0000000..37fdf61
--- /dev/null
+++ b/xen/tools/kconfig/zconf.lex.c_shipped
@@ -0,0 +1,2473 @@
+
+#line 3 "scripts/kconfig/zconf.lex.c_shipped"
+
+#define  YY_INT_ALIGNED short int
+
+/* A lexical scanner generated by flex */
+
+#define yy_create_buffer zconf_create_buffer
+#define yy_delete_buffer zconf_delete_buffer
+#define yy_flex_debug zconf_flex_debug
+#define yy_init_buffer zconf_init_buffer
+#define yy_flush_buffer zconf_flush_buffer
+#define yy_load_buffer_state zconf_load_buffer_state
+#define yy_switch_to_buffer zconf_switch_to_buffer
+#define yyin zconfin
+#define yyleng zconfleng
+#define yylex zconflex
+#define yylineno zconflineno
+#define yyout zconfout
+#define yyrestart zconfrestart
+#define yytext zconftext
+#define yywrap zconfwrap
+#define yyalloc zconfalloc
+#define yyrealloc zconfrealloc
+#define yyfree zconffree
+
+#define FLEX_SCANNER
+#define YY_FLEX_MAJOR_VERSION 2
+#define YY_FLEX_MINOR_VERSION 5
+#define YY_FLEX_SUBMINOR_VERSION 35
+#if YY_FLEX_SUBMINOR_VERSION > 0
+#define FLEX_BETA
+#endif
+
+/* First, we deal with  platform-specific or compiler-specific issues. */
+
+/* begin standard C headers. */
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <stdlib.h>
+
+/* end standard C headers. */
+
+/* flex integer type definitions */
+
+#ifndef FLEXINT_H
+#define FLEXINT_H
+
+/* C99 systems have <inttypes.h>. Non-C99 systems may or may not. */
+
+#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
+
+/* C99 says to define __STDC_LIMIT_MACROS before including stdint.h,
+ * if you want the limit (max/min) macros for int types. 
+ */
+#ifndef __STDC_LIMIT_MACROS
+#define __STDC_LIMIT_MACROS 1
+#endif
+
+#include <inttypes.h>
+typedef int8_t flex_int8_t;
+typedef uint8_t flex_uint8_t;
+typedef int16_t flex_int16_t;
+typedef uint16_t flex_uint16_t;
+typedef int32_t flex_int32_t;
+typedef uint32_t flex_uint32_t;
+#else
+typedef signed char flex_int8_t;
+typedef short int flex_int16_t;
+typedef int flex_int32_t;
+typedef unsigned char flex_uint8_t; 
+typedef unsigned short int flex_uint16_t;
+typedef unsigned int flex_uint32_t;
+
+/* Limits of integral types. */
+#ifndef INT8_MIN
+#define INT8_MIN               (-128)
+#endif
+#ifndef INT16_MIN
+#define INT16_MIN              (-32767-1)
+#endif
+#ifndef INT32_MIN
+#define INT32_MIN              (-2147483647-1)
+#endif
+#ifndef INT8_MAX
+#define INT8_MAX               (127)
+#endif
+#ifndef INT16_MAX
+#define INT16_MAX              (32767)
+#endif
+#ifndef INT32_MAX
+#define INT32_MAX              (2147483647)
+#endif
+#ifndef UINT8_MAX
+#define UINT8_MAX              (255U)
+#endif
+#ifndef UINT16_MAX
+#define UINT16_MAX             (65535U)
+#endif
+#ifndef UINT32_MAX
+#define UINT32_MAX             (4294967295U)
+#endif
+
+#endif /* ! C99 */
+
+#endif /* ! FLEXINT_H */
+
+#ifdef __cplusplus
+
+/* The "const" storage-class-modifier is valid. */
+#define YY_USE_CONST
+
+#else  /* ! __cplusplus */
+
+/* C99 requires __STDC__ to be defined as 1. */
+#if defined (__STDC__)
+
+#define YY_USE_CONST
+
+#endif /* defined (__STDC__) */
+#endif /* ! __cplusplus */
+
+#ifdef YY_USE_CONST
+#define yyconst const
+#else
+#define yyconst
+#endif
+
+/* Returned upon end-of-file. */
+#define YY_NULL 0
+
+/* Promotes a possibly negative, possibly signed char to an unsigned
+ * integer for use as an array index.  If the signed char is negative,
+ * we want to instead treat it as an 8-bit unsigned char, hence the
+ * double cast.
+ */
+#define YY_SC_TO_UI(c) ((unsigned int) (unsigned char) c)
+
+/* Enter a start condition.  This macro really ought to take a parameter,
+ * but we do it the disgusting crufty way forced on us by the ()-less
+ * definition of BEGIN.
+ */
+#define BEGIN (yy_start) = 1 + 2 *
+
+/* Translate the current start state into a value that can be later handed
+ * to BEGIN to return to the state.  The YYSTATE alias is for lex
+ * compatibility.
+ */
+#define YY_START (((yy_start) - 1) / 2)
+#define YYSTATE YY_START
+
+/* Action number for EOF rule of a given start state. */
+#define YY_STATE_EOF(state) (YY_END_OF_BUFFER + state + 1)
+
+/* Special action meaning "start processing a new file". */
+#define YY_NEW_FILE zconfrestart(zconfin  )
+
+#define YY_END_OF_BUFFER_CHAR 0
+
+/* Size of default input buffer. */
+#ifndef YY_BUF_SIZE
+#ifdef __ia64__
+/* On IA-64, the buffer size is 16k, not 8k.
+ * Moreover, YY_BUF_SIZE is 2*YY_READ_BUF_SIZE in the general case.
+ * Ditto for the __ia64__ case accordingly.
+ */
+#define YY_BUF_SIZE 32768
+#else
+#define YY_BUF_SIZE 16384
+#endif /* __ia64__ */
+#endif
+
+/* The state buf must be large enough to hold one state per character in the 
main buffer.
+ */
+#define YY_STATE_BUF_SIZE   ((YY_BUF_SIZE + 2) * sizeof(yy_state_type))
+
+#ifndef YY_TYPEDEF_YY_BUFFER_STATE
+#define YY_TYPEDEF_YY_BUFFER_STATE
+typedef struct yy_buffer_state *YY_BUFFER_STATE;
+#endif
+
+extern int zconfleng;
+
+extern FILE *zconfin, *zconfout;
+
+#define EOB_ACT_CONTINUE_SCAN 0
+#define EOB_ACT_END_OF_FILE 1
+#define EOB_ACT_LAST_MATCH 2
+
+    #define YY_LESS_LINENO(n)
+    
+/* Return all but the first "n" matched characters back to the input stream. */
+#define yyless(n) \
+       do \
+               { \
+               /* Undo effects of setting up zconftext. */ \
+        int yyless_macro_arg = (n); \
+        YY_LESS_LINENO(yyless_macro_arg);\
+               *yy_cp = (yy_hold_char); \
+               YY_RESTORE_YY_MORE_OFFSET \
+               (yy_c_buf_p) = yy_cp = yy_bp + yyless_macro_arg - YY_MORE_ADJ; \
+               YY_DO_BEFORE_ACTION; /* set up zconftext again */ \
+               } \
+       while ( 0 )
+
+#define unput(c) yyunput( c, (yytext_ptr)  )
+
+#ifndef YY_TYPEDEF_YY_SIZE_T
+#define YY_TYPEDEF_YY_SIZE_T
+typedef size_t yy_size_t;
+#endif
+
+#ifndef YY_STRUCT_YY_BUFFER_STATE
+#define YY_STRUCT_YY_BUFFER_STATE
+struct yy_buffer_state
+       {
+       FILE *yy_input_file;
+
+       char *yy_ch_buf;                /* input buffer */
+       char *yy_buf_pos;               /* current position in input buffer */
+
+       /* Size of input buffer in bytes, not including room for EOB
+        * characters.
+        */
+       yy_size_t yy_buf_size;
+
+       /* Number of characters read into yy_ch_buf, not including EOB
+        * characters.
+        */
+       int yy_n_chars;
+
+       /* Whether we "own" the buffer - i.e., we know we created it,
+        * and can realloc() it to grow it, and should free() it to
+        * delete it.
+        */
+       int yy_is_our_buffer;
+
+       /* Whether this is an "interactive" input source; if so, and
+        * if we're using stdio for input, then we want to use getc()
+        * instead of fread(), to make sure we stop fetching input after
+        * each newline.
+        */
+       int yy_is_interactive;
+
+       /* Whether we're considered to be at the beginning of a line.
+        * If so, '^' rules will be active on the next match, otherwise
+        * not.
+        */
+       int yy_at_bol;
+
+    int yy_bs_lineno; /**< The line count. */
+    int yy_bs_column; /**< The column count. */
+    
+       /* Whether to try to fill the input buffer when we reach the
+        * end of it.
+        */
+       int yy_fill_buffer;
+
+       int yy_buffer_status;
+
+#define YY_BUFFER_NEW 0
+#define YY_BUFFER_NORMAL 1
+       /* When an EOF's been seen but there's still some text to process
+        * then we mark the buffer as YY_EOF_PENDING, to indicate that we
+        * shouldn't try reading from the input source any more.  We might
+        * still have a bunch of tokens to match, though, because of
+        * possible backing-up.
+        *
+        * When we actually see the EOF, we change the status to "new"
+        * (via zconfrestart()), so that the user can continue scanning by
+        * just pointing zconfin at a new input file.
+        */
+#define YY_BUFFER_EOF_PENDING 2
+
+       };
+#endif /* !YY_STRUCT_YY_BUFFER_STATE */
+
+/* Stack of input buffers. */
+static size_t yy_buffer_stack_top = 0; /**< index of top of stack. */
+static size_t yy_buffer_stack_max = 0; /**< capacity of stack. */
+static YY_BUFFER_STATE * yy_buffer_stack = 0; /**< Stack as an array. */
+
+/* We provide macros for accessing buffer states in case in the
+ * future we want to put the buffer states in a more general
+ * "scanner state".
+ *
+ * Returns the top of the stack, or NULL.
+ */
+#define YY_CURRENT_BUFFER ( (yy_buffer_stack) \
+                          ? (yy_buffer_stack)[(yy_buffer_stack_top)] \
+                          : NULL)
+
+/* Same as previous macro, but useful when we know that the buffer stack is not
+ * NULL or when we need an lvalue. For internal use only.
+ */
+#define YY_CURRENT_BUFFER_LVALUE (yy_buffer_stack)[(yy_buffer_stack_top)]
+
+/* yy_hold_char holds the character lost when zconftext is formed. */
+static char yy_hold_char;
+static int yy_n_chars;         /* number of characters read into yy_ch_buf */
+int zconfleng;
+
+/* Points to current character in buffer. */
+static char *yy_c_buf_p = (char *) 0;
+static int yy_init = 0;                /* whether we need to initialize */
+static int yy_start = 0;       /* start state number */
+
+/* Flag which is used to allow zconfwrap()'s to do buffer switches
+ * instead of setting up a fresh zconfin.  A bit of a hack ...
+ */
+static int yy_did_buffer_switch_on_eof;
+
+void zconfrestart (FILE *input_file  );
+void zconf_switch_to_buffer (YY_BUFFER_STATE new_buffer  );
+YY_BUFFER_STATE zconf_create_buffer (FILE *file,int size  );
+void zconf_delete_buffer (YY_BUFFER_STATE b  );
+void zconf_flush_buffer (YY_BUFFER_STATE b  );
+void zconfpush_buffer_state (YY_BUFFER_STATE new_buffer  );
+void zconfpop_buffer_state (void );
+
+static void zconfensure_buffer_stack (void );
+static void zconf_load_buffer_state (void );
+static void zconf_init_buffer (YY_BUFFER_STATE b,FILE *file  );
+
+#define YY_FLUSH_BUFFER zconf_flush_buffer(YY_CURRENT_BUFFER )
+
+YY_BUFFER_STATE zconf_scan_buffer (char *base,yy_size_t size  );
+YY_BUFFER_STATE zconf_scan_string (yyconst char *yy_str  );
+YY_BUFFER_STATE zconf_scan_bytes (yyconst char *bytes,int len  );
+
+void *zconfalloc (yy_size_t  );
+void *zconfrealloc (void *,yy_size_t  );
+void zconffree (void *  );
+
+#define yy_new_buffer zconf_create_buffer
+
+#define yy_set_interactive(is_interactive) \
+       { \
+       if ( ! YY_CURRENT_BUFFER ){ \
+        zconfensure_buffer_stack (); \
+               YY_CURRENT_BUFFER_LVALUE =    \
+            zconf_create_buffer(zconfin,YY_BUF_SIZE ); \
+       } \
+       YY_CURRENT_BUFFER_LVALUE->yy_is_interactive = is_interactive; \
+       }
+
+#define yy_set_bol(at_bol) \
+       { \
+       if ( ! YY_CURRENT_BUFFER ){\
+        zconfensure_buffer_stack (); \
+               YY_CURRENT_BUFFER_LVALUE =    \
+            zconf_create_buffer(zconfin,YY_BUF_SIZE ); \
+       } \
+       YY_CURRENT_BUFFER_LVALUE->yy_at_bol = at_bol; \
+       }
+
+#define YY_AT_BOL() (YY_CURRENT_BUFFER_LVALUE->yy_at_bol)
+
+/* Begin user sect3 */
+
+#define zconfwrap(n) 1
+#define YY_SKIP_YYWRAP
+
+typedef unsigned char YY_CHAR;
+
+FILE *zconfin = (FILE *) 0, *zconfout = (FILE *) 0;
+
+typedef int yy_state_type;
+
+extern int zconflineno;
+
+int zconflineno = 1;
+
+extern char *zconftext;
+#define yytext_ptr zconftext
+static yyconst flex_int16_t yy_nxt[][18] =
+    {
+    {
+        0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
+        0,    0,    0,    0,    0,    0,    0,    0
+    },
+
+    {
+       11,   12,   13,   14,   12,   12,   15,   12,   12,   12,
+       12,   12,   12,   12,   12,   12,   12,   12
+    },
+
+    {
+       11,   12,   13,   14,   12,   12,   15,   12,   12,   12,
+       12,   12,   12,   12,   12,   12,   12,   12
+    },
+
+    {
+       11,   16,   16,   17,   16,   16,   16,   16,   16,   16,
+       16,   18,   16,   16,   16,   16,   16,   16
+    },
+
+    {
+       11,   16,   16,   17,   16,   16,   16,   16,   16,   16,
+       16,   18,   16,   16,   16,   16,   16,   16
+
+    },
+
+    {
+       11,   19,   20,   21,   19,   19,   19,   19,   19,   19,
+       19,   19,   19,   19,   19,   19,   19,   19
+    },
+
+    {
+       11,   19,   20,   21,   19,   19,   19,   19,   19,   19,
+       19,   19,   19,   19,   19,   19,   19,   19
+    },
+
+    {
+       11,   22,   22,   23,   22,   24,   22,   22,   24,   22,
+       22,   22,   22,   22,   22,   22,   25,   22
+    },
+
+    {
+       11,   22,   22,   23,   22,   24,   22,   22,   24,   22,
+       22,   22,   22,   22,   22,   22,   25,   22
+    },
+
+    {
+       11,   26,   27,   28,   29,   30,   31,   32,   30,   33,
+       34,   35,   35,   36,   37,   38,   39,   40
+
+    },
+
+    {
+       11,   26,   27,   28,   29,   30,   31,   32,   30,   33,
+       34,   35,   35,   36,   37,   38,   39,   40
+    },
+
+    {
+      -11,  -11,  -11,  -11,  -11,  -11,  -11,  -11,  -11,  -11,
+      -11,  -11,  -11,  -11,  -11,  -11,  -11,  -11
+    },
+
+    {
+       11,  -12,  -12,  -12,  -12,  -12,  -12,  -12,  -12,  -12,
+      -12,  -12,  -12,  -12,  -12,  -12,  -12,  -12
+    },
+
+    {
+       11,  -13,   41,   42,  -13,  -13,   43,  -13,  -13,  -13,
+      -13,  -13,  -13,  -13,  -13,  -13,  -13,  -13
+    },
+
+    {
+       11,  -14,  -14,  -14,  -14,  -14,  -14,  -14,  -14,  -14,
+      -14,  -14,  -14,  -14,  -14,  -14,  -14,  -14
+
+    },
+
+    {
+       11,   44,   44,   45,   44,   44,   44,   44,   44,   44,
+       44,   44,   44,   44,   44,   44,   44,   44
+    },
+
+    {
+       11,  -16,  -16,  -16,  -16,  -16,  -16,  -16,  -16,  -16,
+      -16,  -16,  -16,  -16,  -16,  -16,  -16,  -16
+    },
+
+    {
+       11,  -17,  -17,  -17,  -17,  -17,  -17,  -17,  -17,  -17,
+      -17,  -17,  -17,  -17,  -17,  -17,  -17,  -17
+    },
+
+    {
+       11,  -18,  -18,  -18,  -18,  -18,  -18,  -18,  -18,  -18,
+      -18,   46,  -18,  -18,  -18,  -18,  -18,  -18
+    },
+
+    {
+       11,   47,   47,  -19,   47,   47,   47,   47,   47,   47,
+       47,   47,   47,   47,   47,   47,   47,   47
+
+    },
+
+    {
+       11,  -20,   48,   49,  -20,  -20,  -20,  -20,  -20,  -20,
+      -20,  -20,  -20,  -20,  -20,  -20,  -20,  -20
+    },
+
+    {
+       11,   50,  -21,  -21,   50,   50,   50,   50,   50,   50,
+       50,   50,   50,   50,   50,   50,   50,   50
+    },
+
+    {
+       11,   51,   51,   52,   51,  -22,   51,   51,  -22,   51,
+       51,   51,   51,   51,   51,   51,  -22,   51
+    },
+
+    {
+       11,  -23,  -23,  -23,  -23,  -23,  -23,  -23,  -23,  -23,
+      -23,  -23,  -23,  -23,  -23,  -23,  -23,  -23
+    },
+
+    {
+       11,  -24,  -24,  -24,  -24,  -24,  -24,  -24,  -24,  -24,
+      -24,  -24,  -24,  -24,  -24,  -24,  -24,  -24
+
+    },
+
+    {
+       11,   53,   53,   54,   53,   53,   53,   53,   53,   53,
+       53,   53,   53,   53,   53,   53,   53,   53
+    },
+
+    {
+       11,  -26,  -26,  -26,  -26,  -26,  -26,  -26,  -26,  -26,
+      -26,  -26,  -26,  -26,  -26,  -26,  -26,  -26
+    },
+
+    {
+       11,  -27,   55,  -27,  -27,  -27,  -27,  -27,  -27,  -27,
+      -27,  -27,  -27,  -27,  -27,  -27,  -27,  -27
+    },
+
+    {
+       11,  -28,  -28,  -28,  -28,  -28,  -28,  -28,  -28,  -28,
+      -28,  -28,  -28,  -28,  -28,  -28,  -28,  -28
+    },
+
+    {
+       11,  -29,  -29,  -29,  -29,  -29,  -29,  -29,  -29,  -29,
+      -29,  -29,  -29,  -29,   56,  -29,  -29,  -29
+
+    },
+
+    {
+       11,  -30,  -30,  -30,  -30,  -30,  -30,  -30,  -30,  -30,
+      -30,  -30,  -30,  -30,  -30,  -30,  -30,  -30
+    },
+
+    {
+       11,   57,   57,  -31,   57,   57,   57,   57,   57,   57,
+       57,   57,   57,   57,   57,   57,   57,   57
+    },
+
+    {
+       11,  -32,  -32,  -32,  -32,  -32,  -32,   58,  -32,  -32,
+      -32,  -32,  -32,  -32,  -32,  -32,  -32,  -32
+    },
+
+    {
+       11,  -33,  -33,  -33,  -33,  -33,  -33,  -33,  -33,  -33,
+      -33,  -33,  -33,  -33,  -33,  -33,  -33,  -33
+    },
+
+    {
+       11,  -34,  -34,  -34,  -34,  -34,  -34,  -34,  -34,  -34,
+      -34,  -34,  -34,  -34,  -34,  -34,  -34,  -34
+
+    },
+
+    {
+       11,  -35,  -35,  -35,  -35,  -35,  -35,  -35,  -35,  -35,
+      -35,   59,   59,  -35,  -35,  -35,  -35,  -35
+    },
+
+    {
+       11,  -36,  -36,  -36,  -36,  -36,  -36,  -36,  -36,  -36,
+      -36,  -36,  -36,  -36,   60,  -36,  -36,  -36
+    },
+
+    {
+       11,  -37,  -37,  -37,  -37,  -37,  -37,  -37,  -37,  -37,
+      -37,  -37,  -37,  -37,  -37,  -37,  -37,  -37
+    },
+
+    {
+       11,  -38,  -38,  -38,  -38,  -38,  -38,  -38,  -38,  -38,
+      -38,  -38,  -38,  -38,   61,  -38,  -38,  -38
+    },
+
+    {
+       11,  -39,  -39,   62,  -39,  -39,  -39,  -39,  -39,  -39,
+      -39,  -39,  -39,  -39,  -39,  -39,  -39,  -39
+
+    },
+
+    {
+       11,  -40,  -40,  -40,  -40,  -40,  -40,  -40,  -40,  -40,
+      -40,  -40,  -40,  -40,  -40,  -40,  -40,   63
+    },
+
+    {
+       11,  -41,   41,   42,  -41,  -41,   43,  -41,  -41,  -41,
+      -41,  -41,  -41,  -41,  -41,  -41,  -41,  -41
+    },
+
+    {
+       11,  -42,  -42,  -42,  -42,  -42,  -42,  -42,  -42,  -42,
+      -42,  -42,  -42,  -42,  -42,  -42,  -42,  -42
+    },
+
+    {
+       11,   44,   44,   45,   44,   44,   44,   44,   44,   44,
+       44,   44,   44,   44,   44,   44,   44,   44
+    },
+
+    {
+       11,   44,   44,   45,   44,   44,   44,   44,   44,   44,
+       44,   44,   44,   44,   44,   44,   44,   44
+
+    },
+
+    {
+       11,  -45,  -45,  -45,  -45,  -45,  -45,  -45,  -45,  -45,
+      -45,  -45,  -45,  -45,  -45,  -45,  -45,  -45
+    },
+
+    {
+       11,  -46,  -46,  -46,  -46,  -46,  -46,  -46,  -46,  -46,
+      -46,   46,  -46,  -46,  -46,  -46,  -46,  -46
+    },
+
+    {
+       11,   47,   47,  -47,   47,   47,   47,   47,   47,   47,
+       47,   47,   47,   47,   47,   47,   47,   47
+    },
+
+    {
+       11,  -48,   48,   49,  -48,  -48,  -48,  -48,  -48,  -48,
+      -48,  -48,  -48,  -48,  -48,  -48,  -48,  -48
+    },
+
+    {
+       11,   50,  -49,  -49,   50,   50,   50,   50,   50,   50,
+       50,   50,   50,   50,   50,   50,   50,   50
+
+    },
+
+    {
+       11,  -50,  -50,  -50,  -50,  -50,  -50,  -50,  -50,  -50,
+      -50,  -50,  -50,  -50,  -50,  -50,  -50,  -50
+    },
+
+    {
+       11,   51,   51,   52,   51,  -51,   51,   51,  -51,   51,
+       51,   51,   51,   51,   51,   51,  -51,   51
+    },
+
+    {
+       11,  -52,  -52,  -52,  -52,  -52,  -52,  -52,  -52,  -52,
+      -52,  -52,  -52,  -52,  -52,  -52,  -52,  -52
+    },
+
+    {
+       11,  -53,  -53,   54,  -53,  -53,  -53,  -53,  -53,  -53,
+      -53,  -53,  -53,  -53,  -53,  -53,  -53,  -53
+    },
+
+    {
+       11,  -54,  -54,  -54,  -54,  -54,  -54,  -54,  -54,  -54,
+      -54,  -54,  -54,  -54,  -54,  -54,  -54,  -54
+
+    },
+
+    {
+       11,  -55,   55,  -55,  -55,  -55,  -55,  -55,  -55,  -55,
+      -55,  -55,  -55,  -55,  -55,  -55,  -55,  -55
+    },
+
+    {
+       11,  -56,  -56,  -56,  -56,  -56,  -56,  -56,  -56,  -56,
+      -56,  -56,  -56,  -56,  -56,  -56,  -56,  -56
+    },
+
+    {
+       11,   57,   57,  -57,   57,   57,   57,   57,   57,   57,
+       57,   57,   57,   57,   57,   57,   57,   57
+    },
+
+    {
+       11,  -58,  -58,  -58,  -58,  -58,  -58,  -58,  -58,  -58,
+      -58,  -58,  -58,  -58,  -58,  -58,  -58,  -58
+    },
+
+    {
+       11,  -59,  -59,  -59,  -59,  -59,  -59,  -59,  -59,  -59,
+      -59,   59,   59,  -59,  -59,  -59,  -59,  -59
+
+    },
+
+    {
+       11,  -60,  -60,  -60,  -60,  -60,  -60,  -60,  -60,  -60,
+      -60,  -60,  -60,  -60,  -60,  -60,  -60,  -60
+    },
+
+    {
+       11,  -61,  -61,  -61,  -61,  -61,  -61,  -61,  -61,  -61,
+      -61,  -61,  -61,  -61,  -61,  -61,  -61,  -61
+    },
+
+    {
+       11,  -62,  -62,  -62,  -62,  -62,  -62,  -62,  -62,  -62,
+      -62,  -62,  -62,  -62,  -62,  -62,  -62,  -62
+    },
+
+    {
+       11,  -63,  -63,  -63,  -63,  -63,  -63,  -63,  -63,  -63,
+      -63,  -63,  -63,  -63,  -63,  -63,  -63,  -63
+    },
+
+    } ;
+
+static yy_state_type yy_get_previous_state (void );
+static yy_state_type yy_try_NUL_trans (yy_state_type current_state  );
+static int yy_get_next_buffer (void );
+static void yy_fatal_error (yyconst char msg[]  );
+
+/* Done after the current pattern has been matched and before the
+ * corresponding action - sets up zconftext.
+ */
+#define YY_DO_BEFORE_ACTION \
+       (yytext_ptr) = yy_bp; \
+       zconfleng = (size_t) (yy_cp - yy_bp); \
+       (yy_hold_char) = *yy_cp; \
+       *yy_cp = '\0'; \
+       (yy_c_buf_p) = yy_cp;
+
+#define YY_NUM_RULES 37
+#define YY_END_OF_BUFFER 38
+/* This struct is not used in this scanner,
+   but its presence is necessary. */
+struct yy_trans_info
+       {
+       flex_int32_t yy_verify;
+       flex_int32_t yy_nxt;
+       };
+static yyconst flex_int16_t yy_accept[64] =
+    {   0,
+        0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
+       38,    5,    4,    2,    3,    7,    8,    6,   36,   33,
+       35,   28,   32,   31,   30,   26,   25,   21,   13,   20,
+       23,   26,   11,   12,   22,   18,   14,   19,   26,   26,
+        4,    2,    3,    3,    1,    6,   36,   33,   35,   34,
+       28,   27,   30,   29,   25,   15,   23,    9,   22,   16,
+       17,   24,   10
+    } ;
+
+static yyconst flex_int32_t yy_ec[256] =
+    {   0,
+        1,    1,    1,    1,    1,    1,    1,    1,    2,    3,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    2,    4,    5,    6,    1,    1,    7,    8,    9,
+       10,    1,    1,    1,   11,   12,   12,   11,   11,   11,
+       11,   11,   11,   11,   11,   11,   11,    1,    1,   13,
+       14,   15,    1,    1,   11,   11,   11,   11,   11,   11,
+       11,   11,   11,   11,   11,   11,   11,   11,   11,   11,
+       11,   11,   11,   11,   11,   11,   11,   11,   11,   11,
+        1,   16,    1,    1,   11,    1,   11,   11,   11,   11,
+
+       11,   11,   11,   11,   11,   11,   11,   11,   11,   11,
+       11,   11,   11,   11,   11,   11,   11,   11,   11,   11,
+       11,   11,    1,   17,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1
+    } ;
+
+extern int zconf_flex_debug;
+int zconf_flex_debug = 0;
+
+/* The intent behind this definition is that it'll catch
+ * any uses of REJECT which flex missed.
+ */
+#define REJECT reject_used_but_not_detected
+#define yymore() yymore_used_but_not_detected
+#define YY_MORE_ADJ 0
+#define YY_RESTORE_YY_MORE_OFFSET
+char *zconftext;
+#define YY_NO_INPUT 1
+
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@xxxxxxxxxxxxxx>
+ * Released under the terms of the GNU GPL v2.0.
+ */
+
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "lkc.h"
+
+#define START_STRSIZE  16
+
+static struct {
+       struct file *file;
+       int lineno;
+} current_pos;
+
+static char *text;
+static int text_size, text_asize;
+
+struct buffer {
+       struct buffer *parent;
+       YY_BUFFER_STATE state;
+};
+
+struct buffer *current_buf;
+
+static int last_ts, first_ts;
+
+static void zconf_endhelp(void);
+static void zconf_endfile(void);
+
+static void new_string(void)
+{
+       text = xmalloc(START_STRSIZE);
+       text_asize = START_STRSIZE;
+       text_size = 0;
+       *text = 0;
+}
+
+static void append_string(const char *str, int size)
+{
+       int new_size = text_size + size + 1;
+       if (new_size > text_asize) {
+               new_size += START_STRSIZE - 1;
+               new_size &= -START_STRSIZE;
+               text = realloc(text, new_size);
+               text_asize = new_size;
+       }
+       memcpy(text + text_size, str, size);
+       text_size += size;
+       text[text_size] = 0;
+}
+
+static void alloc_string(const char *str, int size)
+{
+       text = xmalloc(size + 1);
+       memcpy(text, str, size);
+       text[size] = 0;
+}
+
+static void warn_ignored_character(char chr)
+{
+       fprintf(stderr,
+               "%s:%d:warning: ignoring unsupported character '%c'\n",
+               zconf_curname(), zconf_lineno(), chr);
+}
+
+#define INITIAL 0
+#define COMMAND 1
+#define HELP 2
+#define STRING 3
+#define PARAM 4
+
+#ifndef YY_NO_UNISTD_H
+/* Special case for "unistd.h", since it is non-ANSI. We include it way
+ * down here because we want the user's section 1 to have been scanned first.
+ * The user has a chance to override it with an option.
+ */
+#include <unistd.h>
+#endif
+
+#ifndef YY_EXTRA_TYPE
+#define YY_EXTRA_TYPE void *
+#endif
+
+static int yy_init_globals (void );
+
+/* Accessor methods to globals.
+   These are made visible to non-reentrant scanners for convenience. */
+
+int zconflex_destroy (void );
+
+int zconfget_debug (void );
+
+void zconfset_debug (int debug_flag  );
+
+YY_EXTRA_TYPE zconfget_extra (void );
+
+void zconfset_extra (YY_EXTRA_TYPE user_defined  );
+
+FILE *zconfget_in (void );
+
+void zconfset_in  (FILE * in_str  );
+
+FILE *zconfget_out (void );
+
+void zconfset_out  (FILE * out_str  );
+
+int zconfget_leng (void );
+
+char *zconfget_text (void );
+
+int zconfget_lineno (void );
+
+void zconfset_lineno (int line_number  );
+
+/* Macros after this point can all be overridden by user definitions in
+ * section 1.
+ */
+
+#ifndef YY_SKIP_YYWRAP
+#ifdef __cplusplus
+extern "C" int zconfwrap (void );
+#else
+extern int zconfwrap (void );
+#endif
+#endif
+
+    static void yyunput (int c,char *buf_ptr  );
+    
+#ifndef yytext_ptr
+static void yy_flex_strncpy (char *,yyconst char *,int );
+#endif
+
+#ifdef YY_NEED_STRLEN
+static int yy_flex_strlen (yyconst char * );
+#endif
+
+#ifndef YY_NO_INPUT
+
+#ifdef __cplusplus
+static int yyinput (void );
+#else
+static int input (void );
+#endif
+
+#endif
+
+/* Amount of stuff to slurp up with each read. */
+#ifndef YY_READ_BUF_SIZE
+#ifdef __ia64__
+/* On IA-64, the buffer size is 16k, not 8k */
+#define YY_READ_BUF_SIZE 16384
+#else
+#define YY_READ_BUF_SIZE 8192
+#endif /* __ia64__ */
+#endif
+
+/* Copy whatever the last rule matched to the standard output. */
+#ifndef ECHO
+/* This used to be an fputs(), but since the string might contain NUL's,
+ * we now use fwrite().
+ */
+#define ECHO do { if (fwrite( zconftext, zconfleng, 1, zconfout )) {} } while 
(0)
+#endif
+
+/* Gets input and stuffs it into "buf".  number of characters read, or YY_NULL,
+ * is returned in "result".
+ */
+#ifndef YY_INPUT
+#define YY_INPUT(buf,result,max_size) \
+       errno=0; \
+       while ( (result = read( fileno(zconfin), (char *) buf, max_size )) < 0 
) \
+       { \
+               if( errno != EINTR) \
+               { \
+                       YY_FATAL_ERROR( "input in flex scanner failed" ); \
+                       break; \
+               } \
+               errno=0; \
+               clearerr(zconfin); \
+       }\
+\
+
+#endif
+
+/* No semi-colon after return; correct usage is to write "yyterminate();" -
+ * we don't want an extra ';' after the "return" because that will cause
+ * some compilers to complain about unreachable statements.
+ */
+#ifndef yyterminate
+#define yyterminate() return YY_NULL
+#endif
+
+/* Number of entries by which start-condition stack grows. */
+#ifndef YY_START_STACK_INCR
+#define YY_START_STACK_INCR 25
+#endif
+
+/* Report a fatal error. */
+#ifndef YY_FATAL_ERROR
+#define YY_FATAL_ERROR(msg) yy_fatal_error( msg )
+#endif
+
+/* end tables serialization structures and prototypes */
+
+/* Default declaration of generated scanner - a define so the user can
+ * easily add parameters.
+ */
+#ifndef YY_DECL
+#define YY_DECL_IS_OURS 1
+
+extern int zconflex (void);
+
+#define YY_DECL int zconflex (void)
+#endif /* !YY_DECL */
+
+/* Code executed at the beginning of each rule, after zconftext and zconfleng
+ * have been set up.
+ */
+#ifndef YY_USER_ACTION
+#define YY_USER_ACTION
+#endif
+
+/* Code executed at the end of each rule. */
+#ifndef YY_BREAK
+#define YY_BREAK break;
+#endif
+
+#define YY_RULE_SETUP \
+       YY_USER_ACTION
+
+/** The main scanner function which does all the work.
+ */
+YY_DECL
+{
+       register yy_state_type yy_current_state;
+       register char *yy_cp, *yy_bp;
+       register int yy_act;
+    
+       int str = 0;
+       int ts, i;
+
+       if ( !(yy_init) )
+               {
+               (yy_init) = 1;
+
+#ifdef YY_USER_INIT
+               YY_USER_INIT;
+#endif
+
+               if ( ! (yy_start) )
+                       (yy_start) = 1; /* first start state */
+
+               if ( ! zconfin )
+                       zconfin = stdin;
+
+               if ( ! zconfout )
+                       zconfout = stdout;
+
+               if ( ! YY_CURRENT_BUFFER ) {
+                       zconfensure_buffer_stack ();
+                       YY_CURRENT_BUFFER_LVALUE =
+                               zconf_create_buffer(zconfin,YY_BUF_SIZE );
+               }
+
+               zconf_load_buffer_state( );
+               }
+
+       while ( 1 )             /* loops until end-of-file is reached */
+               {
+               yy_cp = (yy_c_buf_p);
+
+               /* Support of zconftext. */
+               *yy_cp = (yy_hold_char);
+
+               /* yy_bp points to the position in yy_ch_buf of the start of
+                * the current run.
+                */
+               yy_bp = yy_cp;
+
+               yy_current_state = (yy_start);
+yy_match:
+               while ( (yy_current_state = yy_nxt[yy_current_state][ 
yy_ec[YY_SC_TO_UI(*yy_cp)]  ]) > 0 )
+                       ++yy_cp;
+
+               yy_current_state = -yy_current_state;
+
+yy_find_action:
+               yy_act = yy_accept[yy_current_state];
+
+               YY_DO_BEFORE_ACTION;
+
+do_action:     /* This label is used only to access EOF actions. */
+
+               switch ( yy_act )
+       { /* beginning of action switch */
+case 1:
+/* rule 1 can match eol */
+case 2:
+/* rule 2 can match eol */
+YY_RULE_SETUP
+{
+       current_file->lineno++;
+       return T_EOL;
+}
+       YY_BREAK
+case 3:
+YY_RULE_SETUP
+
+       YY_BREAK
+case 4:
+YY_RULE_SETUP
+{
+       BEGIN(COMMAND);
+}
+       YY_BREAK
+case 5:
+YY_RULE_SETUP
+{
+       unput(zconftext[0]);
+       BEGIN(COMMAND);
+}
+       YY_BREAK
+
+case 6:
+YY_RULE_SETUP
+{
+               const struct kconf_id *id = kconf_id_lookup(zconftext, 
zconfleng);
+               BEGIN(PARAM);
+               current_pos.file = current_file;
+               current_pos.lineno = current_file->lineno;
+               if (id && id->flags & TF_COMMAND) {
+                       zconflval.id = id;
+                       return id->token;
+               }
+               alloc_string(zconftext, zconfleng);
+               zconflval.string = text;
+               return T_WORD;
+       }
+       YY_BREAK
+case 7:
+YY_RULE_SETUP
+warn_ignored_character(*zconftext);
+       YY_BREAK
+case 8:
+/* rule 8 can match eol */
+YY_RULE_SETUP
+{
+               BEGIN(INITIAL);
+               current_file->lineno++;
+               return T_EOL;
+       }
+       YY_BREAK
+
+case 9:
+YY_RULE_SETUP
+return T_AND;
+       YY_BREAK
+case 10:
+YY_RULE_SETUP
+return T_OR;
+       YY_BREAK
+case 11:
+YY_RULE_SETUP
+return T_OPEN_PAREN;
+       YY_BREAK
+case 12:
+YY_RULE_SETUP
+return T_CLOSE_PAREN;
+       YY_BREAK
+case 13:
+YY_RULE_SETUP
+return T_NOT;
+       YY_BREAK
+case 14:
+YY_RULE_SETUP
+return T_EQUAL;
+       YY_BREAK
+case 15:
+YY_RULE_SETUP
+return T_UNEQUAL;
+       YY_BREAK
+case 16:
+YY_RULE_SETUP
+return T_LESS_EQUAL;
+       YY_BREAK
+case 17:
+YY_RULE_SETUP
+return T_GREATER_EQUAL;
+       YY_BREAK
+case 18:
+YY_RULE_SETUP
+return T_LESS;
+       YY_BREAK
+case 19:
+YY_RULE_SETUP
+return T_GREATER;
+       YY_BREAK
+case 20:
+YY_RULE_SETUP
+{
+               str = zconftext[0];
+               new_string();
+               BEGIN(STRING);
+       }
+       YY_BREAK
+case 21:
+/* rule 21 can match eol */
+YY_RULE_SETUP
+BEGIN(INITIAL); current_file->lineno++; return T_EOL;
+       YY_BREAK
+case 22:
+YY_RULE_SETUP
+{
+               const struct kconf_id *id = kconf_id_lookup(zconftext, 
zconfleng);
+               if (id && id->flags & TF_PARAM) {
+                       zconflval.id = id;
+                       return id->token;
+               }
+               alloc_string(zconftext, zconfleng);
+               zconflval.string = text;
+               return T_WORD;
+       }
+       YY_BREAK
+case 23:
+YY_RULE_SETUP
+/* comment */
+       YY_BREAK
+case 24:
+/* rule 24 can match eol */
+YY_RULE_SETUP
+current_file->lineno++;
+       YY_BREAK
+case 25:
+YY_RULE_SETUP
+
+       YY_BREAK
+case 26:
+YY_RULE_SETUP
+warn_ignored_character(*zconftext);
+       YY_BREAK
+case YY_STATE_EOF(PARAM):
+{
+               BEGIN(INITIAL);
+       }
+       YY_BREAK
+
+case 27:
+/* rule 27 can match eol */
+*yy_cp = (yy_hold_char); /* undo effects of setting up zconftext */
+(yy_c_buf_p) = yy_cp -= 1;
+YY_DO_BEFORE_ACTION; /* set up zconftext again */
+YY_RULE_SETUP
+{
+               append_string(zconftext, zconfleng);
+               zconflval.string = text;
+               return T_WORD_QUOTE;
+       }
+       YY_BREAK
+case 28:
+YY_RULE_SETUP
+{
+               append_string(zconftext, zconfleng);
+       }
+       YY_BREAK
+case 29:
+/* rule 29 can match eol */
+*yy_cp = (yy_hold_char); /* undo effects of setting up zconftext */
+(yy_c_buf_p) = yy_cp -= 1;
+YY_DO_BEFORE_ACTION; /* set up zconftext again */
+YY_RULE_SETUP
+{
+               append_string(zconftext + 1, zconfleng - 1);
+               zconflval.string = text;
+               return T_WORD_QUOTE;
+       }
+       YY_BREAK
+case 30:
+YY_RULE_SETUP
+{
+               append_string(zconftext + 1, zconfleng - 1);
+       }
+       YY_BREAK
+case 31:
+YY_RULE_SETUP
+{
+               if (str == zconftext[0]) {
+                       BEGIN(PARAM);
+                       zconflval.string = text;
+                       return T_WORD_QUOTE;
+               } else
+                       append_string(zconftext, 1);
+       }
+       YY_BREAK
+case 32:
+/* rule 32 can match eol */
+YY_RULE_SETUP
+{
+               printf("%s:%d:warning: multi-line strings not supported\n", 
zconf_curname(), zconf_lineno());
+               current_file->lineno++;
+               BEGIN(INITIAL);
+               return T_EOL;
+       }
+       YY_BREAK
+case YY_STATE_EOF(STRING):
+{
+               BEGIN(INITIAL);
+       }
+       YY_BREAK
+
+case 33:
+YY_RULE_SETUP
+{
+               ts = 0;
+               for (i = 0; i < zconfleng; i++) {
+                       if (zconftext[i] == '\t')
+                               ts = (ts & ~7) + 8;
+                       else
+                               ts++;
+               }
+               last_ts = ts;
+               if (first_ts) {
+                       if (ts < first_ts) {
+                               zconf_endhelp();
+                               return T_HELPTEXT;
+                       }
+                       ts -= first_ts;
+                       while (ts > 8) {
+                               append_string("        ", 8);
+                               ts -= 8;
+                       }
+                       append_string("        ", ts);
+               }
+       }
+       YY_BREAK
+case 34:
+/* rule 34 can match eol */
+*yy_cp = (yy_hold_char); /* undo effects of setting up zconftext */
+(yy_c_buf_p) = yy_cp -= 1;
+YY_DO_BEFORE_ACTION; /* set up zconftext again */
+YY_RULE_SETUP
+{
+               current_file->lineno++;
+               zconf_endhelp();
+               return T_HELPTEXT;
+       }
+       YY_BREAK
+case 35:
+/* rule 35 can match eol */
+YY_RULE_SETUP
+{
+               current_file->lineno++;
+               append_string("\n", 1);
+       }
+       YY_BREAK
+case 36:
+YY_RULE_SETUP
+{
+               while (zconfleng) {
+                       if ((zconftext[zconfleng-1] != ' ') && 
(zconftext[zconfleng-1] != '\t'))
+                               break;
+                       zconfleng--;
+               }
+               append_string(zconftext, zconfleng);
+               if (!first_ts)
+                       first_ts = last_ts;
+       }
+       YY_BREAK
+case YY_STATE_EOF(HELP):
+{
+               zconf_endhelp();
+               return T_HELPTEXT;
+       }
+       YY_BREAK
+
+case YY_STATE_EOF(INITIAL):
+case YY_STATE_EOF(COMMAND):
+{
+       if (current_file) {
+               zconf_endfile();
+               return T_EOL;
+       }
+       fclose(zconfin);
+       yyterminate();
+}
+       YY_BREAK
+case 37:
+YY_RULE_SETUP
+YY_FATAL_ERROR( "flex scanner jammed" );
+       YY_BREAK
+
+       case YY_END_OF_BUFFER:
+               {
+               /* Amount of text matched not including the EOB char. */
+               int yy_amount_of_matched_text = (int) (yy_cp - (yytext_ptr)) - 
1;
+
+               /* Undo the effects of YY_DO_BEFORE_ACTION. */
+               *yy_cp = (yy_hold_char);
+               YY_RESTORE_YY_MORE_OFFSET
+
+               if ( YY_CURRENT_BUFFER_LVALUE->yy_buffer_status == 
YY_BUFFER_NEW )
+                       {
+                       /* We're scanning a new file or input source.  It's
+                        * possible that this happened because the user
+                        * just pointed zconfin at a new source and called
+                        * zconflex().  If so, then we have to assure
+                        * consistency between YY_CURRENT_BUFFER and our
+                        * globals.  Here is the right place to do so, because
+                        * this is the first action (other than possibly a
+                        * back-up) that will match for the new input source.
+                        */
+                       (yy_n_chars) = YY_CURRENT_BUFFER_LVALUE->yy_n_chars;
+                       YY_CURRENT_BUFFER_LVALUE->yy_input_file = zconfin;
+                       YY_CURRENT_BUFFER_LVALUE->yy_buffer_status = 
YY_BUFFER_NORMAL;
+                       }
+
+               /* Note that here we test for yy_c_buf_p "<=" to the position
+                * of the first EOB in the buffer, since yy_c_buf_p will
+                * already have been incremented past the NUL character
+                * (since all states make transitions on EOB to the
+                * end-of-buffer state).  Contrast this with the test
+                * in input().
+                */
+               if ( (yy_c_buf_p) <= 
&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)] )
+                       { /* This was really a NUL. */
+                       yy_state_type yy_next_state;
+
+                       (yy_c_buf_p) = (yytext_ptr) + yy_amount_of_matched_text;
+
+                       yy_current_state = yy_get_previous_state(  );
+
+                       /* Okay, we're now positioned to make the NUL
+                        * transition.  We couldn't have
+                        * yy_get_previous_state() go ahead and do it
+                        * for us because it doesn't know how to deal
+                        * with the possibility of jamming (and we don't
+                        * want to build jamming into it because then it
+                        * will run more slowly).
+                        */
+
+                       yy_next_state = yy_try_NUL_trans( yy_current_state );
+
+                       yy_bp = (yytext_ptr) + YY_MORE_ADJ;
+
+                       if ( yy_next_state )
+                               {
+                               /* Consume the NUL. */
+                               yy_cp = ++(yy_c_buf_p);
+                               yy_current_state = yy_next_state;
+                               goto yy_match;
+                               }
+
+                       else
+                               {
+                               yy_cp = (yy_c_buf_p);
+                               goto yy_find_action;
+                               }
+                       }
+
+               else switch ( yy_get_next_buffer(  ) )
+                       {
+                       case EOB_ACT_END_OF_FILE:
+                               {
+                               (yy_did_buffer_switch_on_eof) = 0;
+
+                               if ( zconfwrap( ) )
+                                       {
+                                       /* Note: because we've taken care in
+                                        * yy_get_next_buffer() to have set up
+                                        * zconftext, we can now set up
+                                        * yy_c_buf_p so that if some total
+                                        * hoser (like flex itself) wants to
+                                        * call the scanner after we return the
+                                        * YY_NULL, it'll still work - another
+                                        * YY_NULL will get returned.
+                                        */
+                                       (yy_c_buf_p) = (yytext_ptr) + 
YY_MORE_ADJ;
+
+                                       yy_act = YY_STATE_EOF(YY_START);
+                                       goto do_action;
+                                       }
+
+                               else
+                                       {
+                                       if ( ! (yy_did_buffer_switch_on_eof) )
+                                               YY_NEW_FILE;
+                                       }
+                               break;
+                               }
+
+                       case EOB_ACT_CONTINUE_SCAN:
+                               (yy_c_buf_p) =
+                                       (yytext_ptr) + 
yy_amount_of_matched_text;
+
+                               yy_current_state = yy_get_previous_state(  );
+
+                               yy_cp = (yy_c_buf_p);
+                               yy_bp = (yytext_ptr) + YY_MORE_ADJ;
+                               goto yy_match;
+
+                       case EOB_ACT_LAST_MATCH:
+                               (yy_c_buf_p) =
+                               
&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)];
+
+                               yy_current_state = yy_get_previous_state(  );
+
+                               yy_cp = (yy_c_buf_p);
+                               yy_bp = (yytext_ptr) + YY_MORE_ADJ;
+                               goto yy_find_action;
+                       }
+               break;
+               }
+
+       default:
+               YY_FATAL_ERROR(
+                       "fatal flex scanner internal error--no action found" );
+       } /* end of action switch */
+               } /* end of scanning one token */
+} /* end of zconflex */
+
+/* yy_get_next_buffer - try to read in a new buffer
+ *
+ * Returns a code representing an action:
+ *     EOB_ACT_LAST_MATCH -
+ *     EOB_ACT_CONTINUE_SCAN - continue scanning from current position
+ *     EOB_ACT_END_OF_FILE - end of file
+ */
+static int yy_get_next_buffer (void)
+{
+       register char *dest = YY_CURRENT_BUFFER_LVALUE->yy_ch_buf;
+       register char *source = (yytext_ptr);
+       register int number_to_move, i;
+       int ret_val;
+
+       if ( (yy_c_buf_p) > &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars) + 
1] )
+               YY_FATAL_ERROR(
+               "fatal flex scanner internal error--end of buffer missed" );
+
+       if ( YY_CURRENT_BUFFER_LVALUE->yy_fill_buffer == 0 )
+               { /* Don't try to fill the buffer, so this is an EOF. */
+               if ( (yy_c_buf_p) - (yytext_ptr) - YY_MORE_ADJ == 1 )
+                       {
+                       /* We matched a single character, the EOB, so
+                        * treat this as a final EOF.
+                        */
+                       return EOB_ACT_END_OF_FILE;
+                       }
+
+               else
+                       {
+                       /* We matched some text prior to the EOB, first
+                        * process it.
+                        */
+                       return EOB_ACT_LAST_MATCH;
+                       }
+               }
+
+       /* Try to read more data. */
+
+       /* First move last chars to start of buffer. */
+       number_to_move = (int) ((yy_c_buf_p) - (yytext_ptr)) - 1;
+
+       for ( i = 0; i < number_to_move; ++i )
+               *(dest++) = *(source++);
+
+       if ( YY_CURRENT_BUFFER_LVALUE->yy_buffer_status == 
YY_BUFFER_EOF_PENDING )
+               /* don't do the read, it's not guaranteed to return an EOF,
+                * just force an EOF
+                */
+               YY_CURRENT_BUFFER_LVALUE->yy_n_chars = (yy_n_chars) = 0;
+
+       else
+               {
+                       int num_to_read =
+                       YY_CURRENT_BUFFER_LVALUE->yy_buf_size - number_to_move 
- 1;
+
+               while ( num_to_read <= 0 )
+                       { /* Not enough room in the buffer - grow it. */
+
+                       /* just a shorter name for the current buffer */
+                       YY_BUFFER_STATE b = YY_CURRENT_BUFFER;
+
+                       int yy_c_buf_p_offset =
+                               (int) ((yy_c_buf_p) - b->yy_ch_buf);
+
+                       if ( b->yy_is_our_buffer )
+                               {
+                               int new_size = b->yy_buf_size * 2;
+
+                               if ( new_size <= 0 )
+                                       b->yy_buf_size += b->yy_buf_size / 8;
+                               else
+                                       b->yy_buf_size *= 2;
+
+                               b->yy_ch_buf = (char *)
+                                       /* Include room in for 2 EOB chars. */
+                                       zconfrealloc((void *) 
b->yy_ch_buf,b->yy_buf_size + 2  );
+                               }
+                       else
+                               /* Can't grow it, we don't own it. */
+                               b->yy_ch_buf = 0;
+
+                       if ( ! b->yy_ch_buf )
+                               YY_FATAL_ERROR(
+                               "fatal error - scanner input buffer overflow" );
+
+                       (yy_c_buf_p) = &b->yy_ch_buf[yy_c_buf_p_offset];
+
+                       num_to_read = YY_CURRENT_BUFFER_LVALUE->yy_buf_size -
+                                               number_to_move - 1;
+
+                       }
+
+               if ( num_to_read > YY_READ_BUF_SIZE )
+                       num_to_read = YY_READ_BUF_SIZE;
+
+               /* Read in more data. */
+               YY_INPUT( 
(&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[number_to_move]),
+                       (yy_n_chars), (size_t) num_to_read );
+
+               YY_CURRENT_BUFFER_LVALUE->yy_n_chars = (yy_n_chars);
+               }
+
+       if ( (yy_n_chars) == 0 )
+               {
+               if ( number_to_move == YY_MORE_ADJ )
+                       {
+                       ret_val = EOB_ACT_END_OF_FILE;
+                       zconfrestart(zconfin  );
+                       }
+
+               else
+                       {
+                       ret_val = EOB_ACT_LAST_MATCH;
+                       YY_CURRENT_BUFFER_LVALUE->yy_buffer_status =
+                               YY_BUFFER_EOF_PENDING;
+                       }
+               }
+
+       else
+               ret_val = EOB_ACT_CONTINUE_SCAN;
+
+       if ((yy_size_t) ((yy_n_chars) + number_to_move) > 
YY_CURRENT_BUFFER_LVALUE->yy_buf_size) {
+               /* Extend the array by 50%, plus the number we really need. */
+               yy_size_t new_size = (yy_n_chars) + number_to_move + 
((yy_n_chars) >> 1);
+               YY_CURRENT_BUFFER_LVALUE->yy_ch_buf = (char *) 
zconfrealloc((void *) YY_CURRENT_BUFFER_LVALUE->yy_ch_buf,new_size  );
+               if ( ! YY_CURRENT_BUFFER_LVALUE->yy_ch_buf )
+                       YY_FATAL_ERROR( "out of dynamic memory in 
yy_get_next_buffer()" );
+       }
+
+       (yy_n_chars) += number_to_move;
+       YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)] = 
YY_END_OF_BUFFER_CHAR;
+       YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars) + 1] = 
YY_END_OF_BUFFER_CHAR;
+
+       (yytext_ptr) = &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[0];
+
+       return ret_val;
+}
+
+/* yy_get_previous_state - get the state just before the EOB char was reached 
*/
+
+    static yy_state_type yy_get_previous_state (void)
+{
+       register yy_state_type yy_current_state;
+       register char *yy_cp;
+    
+       yy_current_state = (yy_start);
+
+       for ( yy_cp = (yytext_ptr) + YY_MORE_ADJ; yy_cp < (yy_c_buf_p); ++yy_cp 
)
+               {
+               yy_current_state = yy_nxt[yy_current_state][(*yy_cp ? 
yy_ec[YY_SC_TO_UI(*yy_cp)] : 1)];
+               }
+
+       return yy_current_state;
+}
+
+/* yy_try_NUL_trans - try to make a transition on the NUL character
+ *
+ * synopsis
+ *     next_state = yy_try_NUL_trans( current_state );
+ */
+    static yy_state_type yy_try_NUL_trans  (yy_state_type yy_current_state )
+{
+       register int yy_is_jam;
+    
+       yy_current_state = yy_nxt[yy_current_state][1];
+       yy_is_jam = (yy_current_state <= 0);
+
+       return yy_is_jam ? 0 : yy_current_state;
+}
+
+    static void yyunput (int c, register char * yy_bp )
+{
+       register char *yy_cp;
+    
+    yy_cp = (yy_c_buf_p);
+
+       /* undo effects of setting up zconftext */
+       *yy_cp = (yy_hold_char);
+
+       if ( yy_cp < YY_CURRENT_BUFFER_LVALUE->yy_ch_buf + 2 )
+               { /* need to shift things up to make room */
+               /* +2 for EOB chars. */
+               register int number_to_move = (yy_n_chars) + 2;
+               register char *dest = &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[
+                                       YY_CURRENT_BUFFER_LVALUE->yy_buf_size + 
2];
+               register char *source =
+                               
&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[number_to_move];
+
+               while ( source > YY_CURRENT_BUFFER_LVALUE->yy_ch_buf )
+                       *--dest = *--source;
+
+               yy_cp += (int) (dest - source);
+               yy_bp += (int) (dest - source);
+               YY_CURRENT_BUFFER_LVALUE->yy_n_chars =
+                       (yy_n_chars) = YY_CURRENT_BUFFER_LVALUE->yy_buf_size;
+
+               if ( yy_cp < YY_CURRENT_BUFFER_LVALUE->yy_ch_buf + 2 )
+                       YY_FATAL_ERROR( "flex scanner push-back overflow" );
+               }
+
+       *--yy_cp = (char) c;
+
+       (yytext_ptr) = yy_bp;
+       (yy_hold_char) = *yy_cp;
+       (yy_c_buf_p) = yy_cp;
+}
+
+#ifndef YY_NO_INPUT
+#ifdef __cplusplus
+    static int yyinput (void)
+#else
+    static int input  (void)
+#endif
+
+{
+       int c;
+    
+       *(yy_c_buf_p) = (yy_hold_char);
+
+       if ( *(yy_c_buf_p) == YY_END_OF_BUFFER_CHAR )
+               {
+               /* yy_c_buf_p now points to the character we want to return.
+                * If this occurs *before* the EOB characters, then it's a
+                * valid NUL; if not, then we've hit the end of the buffer.
+                */
+               if ( (yy_c_buf_p) < 
&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)] )
+                       /* This was really a NUL. */
+                       *(yy_c_buf_p) = '\0';
+
+               else
+                       { /* need more input */
+                       int offset = (yy_c_buf_p) - (yytext_ptr);
+                       ++(yy_c_buf_p);
+
+                       switch ( yy_get_next_buffer(  ) )
+                               {
+                               case EOB_ACT_LAST_MATCH:
+                                       /* This happens because yy_g_n_b()
+                                        * sees that we've accumulated a
+                                        * token and flags that we need to
+                                        * try matching the token before
+                                        * proceeding.  But for input(),
+                                        * there's no matching to consider.
+                                        * So convert the EOB_ACT_LAST_MATCH
+                                        * to EOB_ACT_END_OF_FILE.
+                                        */
+
+                                       /* Reset buffer status. */
+                                       zconfrestart(zconfin );
+
+                                       /*FALLTHROUGH*/
+
+                               case EOB_ACT_END_OF_FILE:
+                                       {
+                                       if ( zconfwrap( ) )
+                                               return EOF;
+
+                                       if ( ! (yy_did_buffer_switch_on_eof) )
+                                               YY_NEW_FILE;
+#ifdef __cplusplus
+                                       return yyinput();
+#else
+                                       return input();
+#endif
+                                       }
+
+                               case EOB_ACT_CONTINUE_SCAN:
+                                       (yy_c_buf_p) = (yytext_ptr) + offset;
+                                       break;
+                               }
+                       }
+               }
+
+       c = *(unsigned char *) (yy_c_buf_p);    /* cast for 8-bit char's */
+       *(yy_c_buf_p) = '\0';   /* preserve zconftext */
+       (yy_hold_char) = *++(yy_c_buf_p);
+
+       return c;
+}
+#endif /* ifndef YY_NO_INPUT */
+
+/** Immediately switch to a different input stream.
+ * @param input_file A readable stream.
+ * 
+ * @note This function does not reset the start condition to @c INITIAL .
+ */
+    void zconfrestart  (FILE * input_file )
+{
+    
+       if ( ! YY_CURRENT_BUFFER ){
+        zconfensure_buffer_stack ();
+               YY_CURRENT_BUFFER_LVALUE =
+            zconf_create_buffer(zconfin,YY_BUF_SIZE );
+       }
+
+       zconf_init_buffer(YY_CURRENT_BUFFER,input_file );
+       zconf_load_buffer_state( );
+}
+
+/** Switch to a different input buffer.
+ * @param new_buffer The new input buffer.
+ * 
+ */
+    void zconf_switch_to_buffer  (YY_BUFFER_STATE  new_buffer )
+{
+    
+       /* TODO. We should be able to replace this entire function body
+        * with
+        *              zconfpop_buffer_state();
+        *              zconfpush_buffer_state(new_buffer);
+     */
+       zconfensure_buffer_stack ();
+       if ( YY_CURRENT_BUFFER == new_buffer )
+               return;
+
+       if ( YY_CURRENT_BUFFER )
+               {
+               /* Flush out information for old buffer. */
+               *(yy_c_buf_p) = (yy_hold_char);
+               YY_CURRENT_BUFFER_LVALUE->yy_buf_pos = (yy_c_buf_p);
+               YY_CURRENT_BUFFER_LVALUE->yy_n_chars = (yy_n_chars);
+               }
+
+       YY_CURRENT_BUFFER_LVALUE = new_buffer;
+       zconf_load_buffer_state( );
+
+       /* We don't actually know whether we did this switch during
+        * EOF (zconfwrap()) processing, but the only time this flag
+        * is looked at is after zconfwrap() is called, so it's safe
+        * to go ahead and always set it.
+        */
+       (yy_did_buffer_switch_on_eof) = 1;
+}
+
+static void zconf_load_buffer_state  (void)
+{
+       (yy_n_chars) = YY_CURRENT_BUFFER_LVALUE->yy_n_chars;
+       (yytext_ptr) = (yy_c_buf_p) = YY_CURRENT_BUFFER_LVALUE->yy_buf_pos;
+       zconfin = YY_CURRENT_BUFFER_LVALUE->yy_input_file;
+       (yy_hold_char) = *(yy_c_buf_p);
+}
+
+/** Allocate and initialize an input buffer state.
+ * @param file A readable stream.
+ * @param size The character buffer size in bytes. When in doubt, use @c 
YY_BUF_SIZE.
+ * 
+ * @return the allocated buffer state.
+ */
+    YY_BUFFER_STATE zconf_create_buffer  (FILE * file, int  size )
+{
+       YY_BUFFER_STATE b;
+    
+       b = (YY_BUFFER_STATE) zconfalloc(sizeof( struct yy_buffer_state )  );
+       if ( ! b )
+               YY_FATAL_ERROR( "out of dynamic memory in 
zconf_create_buffer()" );
+
+       b->yy_buf_size = size;
+
+       /* yy_ch_buf has to be 2 characters longer than the size given because
+        * we need to put in 2 end-of-buffer characters.
+        */
+       b->yy_ch_buf = (char *) zconfalloc(b->yy_buf_size + 2  );
+       if ( ! b->yy_ch_buf )
+               YY_FATAL_ERROR( "out of dynamic memory in 
zconf_create_buffer()" );
+
+       b->yy_is_our_buffer = 1;
+
+       zconf_init_buffer(b,file );
+
+       return b;
+}
+
+/** Destroy the buffer.
+ * @param b a buffer created with zconf_create_buffer()
+ * 
+ */
+    void zconf_delete_buffer (YY_BUFFER_STATE  b )
+{
+    
+       if ( ! b )
+               return;
+
+       if ( b == YY_CURRENT_BUFFER ) /* Not sure if we should pop here. */
+               YY_CURRENT_BUFFER_LVALUE = (YY_BUFFER_STATE) 0;
+
+       if ( b->yy_is_our_buffer )
+               zconffree((void *) b->yy_ch_buf  );
+
+       zconffree((void *) b  );
+}
+
+/* Initializes or reinitializes a buffer.
+ * This function is sometimes called more than once on the same buffer,
+ * such as during a zconfrestart() or at EOF.
+ */
+    static void zconf_init_buffer  (YY_BUFFER_STATE  b, FILE * file )
+
+{
+       int oerrno = errno;
+    
+       zconf_flush_buffer(b );
+
+       b->yy_input_file = file;
+       b->yy_fill_buffer = 1;
+
+    /* If b is the current buffer, then zconf_init_buffer was _probably_
+     * called from zconfrestart() or through yy_get_next_buffer.
+     * In that case, we don't want to reset the lineno or column.
+     */
+    if (b != YY_CURRENT_BUFFER){
+        b->yy_bs_lineno = 1;
+        b->yy_bs_column = 0;
+    }
+
+        b->yy_is_interactive = 0;
+    
+       errno = oerrno;
+}
+
+/** Discard all buffered characters. On the next scan, YY_INPUT will be called.
+ * @param b the buffer state to be flushed, usually @c YY_CURRENT_BUFFER.
+ * 
+ */
+    void zconf_flush_buffer (YY_BUFFER_STATE  b )
+{
+       if ( ! b )
+               return;
+
+       b->yy_n_chars = 0;
+
+       /* We always need two end-of-buffer characters.  The first causes
+        * a transition to the end-of-buffer state.  The second causes
+        * a jam in that state.
+        */
+       b->yy_ch_buf[0] = YY_END_OF_BUFFER_CHAR;
+       b->yy_ch_buf[1] = YY_END_OF_BUFFER_CHAR;
+
+       b->yy_buf_pos = &b->yy_ch_buf[0];
+
+       b->yy_at_bol = 1;
+       b->yy_buffer_status = YY_BUFFER_NEW;
+
+       if ( b == YY_CURRENT_BUFFER )
+               zconf_load_buffer_state( );
+}
+
+/** Pushes the new state onto the stack. The new state becomes
+ *  the current state. This function will allocate the stack
+ *  if necessary.
+ *  @param new_buffer The new state.
+ *  
+ */
+void zconfpush_buffer_state (YY_BUFFER_STATE new_buffer )
+{
+       if (new_buffer == NULL)
+               return;
+
+       zconfensure_buffer_stack();
+
+       /* This block is copied from zconf_switch_to_buffer. */
+       if ( YY_CURRENT_BUFFER )
+               {
+               /* Flush out information for old buffer. */
+               *(yy_c_buf_p) = (yy_hold_char);
+               YY_CURRENT_BUFFER_LVALUE->yy_buf_pos = (yy_c_buf_p);
+               YY_CURRENT_BUFFER_LVALUE->yy_n_chars = (yy_n_chars);
+               }
+
+       /* Only push if top exists. Otherwise, replace top. */
+       if (YY_CURRENT_BUFFER)
+               (yy_buffer_stack_top)++;
+       YY_CURRENT_BUFFER_LVALUE = new_buffer;
+
+       /* copied from zconf_switch_to_buffer. */
+       zconf_load_buffer_state( );
+       (yy_did_buffer_switch_on_eof) = 1;
+}
+
+/** Removes and deletes the top of the stack, if present.
+ *  The next element becomes the new top.
+ *  
+ */
+void zconfpop_buffer_state (void)
+{
+       if (!YY_CURRENT_BUFFER)
+               return;
+
+       zconf_delete_buffer(YY_CURRENT_BUFFER );
+       YY_CURRENT_BUFFER_LVALUE = NULL;
+       if ((yy_buffer_stack_top) > 0)
+               --(yy_buffer_stack_top);
+
+       if (YY_CURRENT_BUFFER) {
+               zconf_load_buffer_state( );
+               (yy_did_buffer_switch_on_eof) = 1;
+       }
+}
+
+/* Allocates the stack if it does not exist.
+ *  Guarantees space for at least one push.
+ */
+static void zconfensure_buffer_stack (void)
+{
+       int num_to_alloc;
+    
+       if (!(yy_buffer_stack)) {
+
+               /* First allocation is just for 2 elements, since we don't know 
if this
+                * scanner will even need a stack. We use 2 instead of 1 to 
avoid an
+                * immediate realloc on the next call.
+         */
+               num_to_alloc = 1;
+               (yy_buffer_stack) = (struct yy_buffer_state**)zconfalloc
+                                                               (num_to_alloc * 
sizeof(struct yy_buffer_state*)
+                                                               );
+               if ( ! (yy_buffer_stack) )
+                       YY_FATAL_ERROR( "out of dynamic memory in 
zconfensure_buffer_stack()" );
+                                                                 
+               memset((yy_buffer_stack), 0, num_to_alloc * sizeof(struct 
yy_buffer_state*));
+                               
+               (yy_buffer_stack_max) = num_to_alloc;
+               (yy_buffer_stack_top) = 0;
+               return;
+       }
+
+       if ((yy_buffer_stack_top) >= ((yy_buffer_stack_max)) - 1){
+
+               /* Increase the buffer to prepare for a possible push. */
+               int grow_size = 8 /* arbitrary grow size */;
+
+               num_to_alloc = (yy_buffer_stack_max) + grow_size;
+               (yy_buffer_stack) = (struct yy_buffer_state**)zconfrealloc
+                                                               
((yy_buffer_stack),
+                                                               num_to_alloc * 
sizeof(struct yy_buffer_state*)
+                                                               );
+               if ( ! (yy_buffer_stack) )
+                       YY_FATAL_ERROR( "out of dynamic memory in 
zconfensure_buffer_stack()" );
+
+               /* zero only the new slots.*/
+               memset((yy_buffer_stack) + (yy_buffer_stack_max), 0, grow_size 
* sizeof(struct yy_buffer_state*));
+               (yy_buffer_stack_max) = num_to_alloc;
+       }
+}
+
+/** Setup the input buffer state to scan directly from a user-specified 
character buffer.
+ * @param base the character buffer
+ * @param size the size in bytes of the character buffer
+ * 
+ * @return the newly allocated buffer state object. 
+ */
+YY_BUFFER_STATE zconf_scan_buffer  (char * base, yy_size_t  size )
+{
+       YY_BUFFER_STATE b;
+    
+       if ( size < 2 ||
+            base[size-2] != YY_END_OF_BUFFER_CHAR ||
+            base[size-1] != YY_END_OF_BUFFER_CHAR )
+               /* They forgot to leave room for the EOB's. */
+               return 0;
+
+       b = (YY_BUFFER_STATE) zconfalloc(sizeof( struct yy_buffer_state )  );
+       if ( ! b )
+               YY_FATAL_ERROR( "out of dynamic memory in zconf_scan_buffer()" 
);
+
+       b->yy_buf_size = size - 2;      /* "- 2" to take care of EOB's */
+       b->yy_buf_pos = b->yy_ch_buf = base;
+       b->yy_is_our_buffer = 0;
+       b->yy_input_file = 0;
+       b->yy_n_chars = b->yy_buf_size;
+       b->yy_is_interactive = 0;
+       b->yy_at_bol = 1;
+       b->yy_fill_buffer = 0;
+       b->yy_buffer_status = YY_BUFFER_NEW;
+
+       zconf_switch_to_buffer(b  );
+
+       return b;
+}
+
+/** Setup the input buffer state to scan a string. The next call to zconflex() 
will
+ * scan from a @e copy of @a str.
+ * @param yystr a NUL-terminated string to scan
+ * 
+ * @return the newly allocated buffer state object.
+ * @note If you want to scan bytes that may contain NUL values, then use
+ *       zconf_scan_bytes() instead.
+ */
+YY_BUFFER_STATE zconf_scan_string (yyconst char * yystr )
+{
+    
+       return zconf_scan_bytes(yystr,strlen(yystr) );
+}
+
+/** Setup the input buffer state to scan the given bytes. The next call to 
zconflex() will
+ * scan from a @e copy of @a bytes.
+ * @param yybytes the byte buffer to scan
+ * @param _yybytes_len the number of bytes in the buffer pointed to by @a 
bytes.
+ * 
+ * @return the newly allocated buffer state object.
+ */
+YY_BUFFER_STATE zconf_scan_bytes  (yyconst char * yybytes, int  _yybytes_len )
+{
+       YY_BUFFER_STATE b;
+       char *buf;
+       yy_size_t n;
+       int i;
+    
+       /* Get memory for full buffer, including space for trailing EOB's. */
+       n = _yybytes_len + 2;
+       buf = (char *) zconfalloc(n  );
+       if ( ! buf )
+               YY_FATAL_ERROR( "out of dynamic memory in zconf_scan_bytes()" );
+
+       for ( i = 0; i < _yybytes_len; ++i )
+               buf[i] = yybytes[i];
+
+       buf[_yybytes_len] = buf[_yybytes_len+1] = YY_END_OF_BUFFER_CHAR;
+
+       b = zconf_scan_buffer(buf,n );
+       if ( ! b )
+               YY_FATAL_ERROR( "bad buffer in zconf_scan_bytes()" );
+
+       /* It's okay to grow etc. this buffer, and we should throw it
+        * away when we're done.
+        */
+       b->yy_is_our_buffer = 1;
+
+       return b;
+}
+
+#ifndef YY_EXIT_FAILURE
+#define YY_EXIT_FAILURE 2
+#endif
+
+static void yy_fatal_error (yyconst char* msg )
+{
+       (void) fprintf( stderr, "%s\n", msg );
+       exit( YY_EXIT_FAILURE );
+}
+
+/* Redefine yyless() so it works in section 3 code. */
+
+#undef yyless
+#define yyless(n) \
+       do \
+               { \
+               /* Undo effects of setting up zconftext. */ \
+        int yyless_macro_arg = (n); \
+        YY_LESS_LINENO(yyless_macro_arg);\
+               zconftext[zconfleng] = (yy_hold_char); \
+               (yy_c_buf_p) = zconftext + yyless_macro_arg; \
+               (yy_hold_char) = *(yy_c_buf_p); \
+               *(yy_c_buf_p) = '\0'; \
+               zconfleng = yyless_macro_arg; \
+               } \
+       while ( 0 )
+
+/* Accessor  methods (get/set functions) to struct members. */
+
+/** Get the current line number.
+ * 
+ */
+int zconfget_lineno  (void)
+{
+        
+    return zconflineno;
+}
+
+/** Get the input stream.
+ * 
+ */
+FILE *zconfget_in  (void)
+{
+        return zconfin;
+}
+
+/** Get the output stream.
+ * 
+ */
+FILE *zconfget_out  (void)
+{
+        return zconfout;
+}
+
+/** Get the length of the current token.
+ * 
+ */
+int zconfget_leng  (void)
+{
+        return zconfleng;
+}
+
+/** Get the current token.
+ * 
+ */
+
+char *zconfget_text  (void)
+{
+        return zconftext;
+}
+
+/** Set the current line number.
+ * @param line_number
+ * 
+ */
+void zconfset_lineno (int  line_number )
+{
+    
+    zconflineno = line_number;
+}
+
+/** Set the input stream. This does not discard the current
+ * input buffer.
+ * @param in_str A readable stream.
+ * 
+ * @see zconf_switch_to_buffer
+ */
+void zconfset_in (FILE *  in_str )
+{
+        zconfin = in_str ;
+}
+
+void zconfset_out (FILE *  out_str )
+{
+        zconfout = out_str ;
+}
+
+int zconfget_debug  (void)
+{
+        return zconf_flex_debug;
+}
+
+void zconfset_debug (int  bdebug )
+{
+        zconf_flex_debug = bdebug ;
+}
+
+static int yy_init_globals (void)
+{
+        /* Initialization is the same as for the non-reentrant scanner.
+     * This function is called from zconflex_destroy(), so don't allocate here.
+     */
+
+    (yy_buffer_stack) = 0;
+    (yy_buffer_stack_top) = 0;
+    (yy_buffer_stack_max) = 0;
+    (yy_c_buf_p) = (char *) 0;
+    (yy_init) = 0;
+    (yy_start) = 0;
+
+/* Defined in main.c */
+#ifdef YY_STDINIT
+    zconfin = stdin;
+    zconfout = stdout;
+#else
+    zconfin = (FILE *) 0;
+    zconfout = (FILE *) 0;
+#endif
+
+    /* For future reference: Set errno on error, since we are called by
+     * zconflex_init()
+     */
+    return 0;
+}
+
+/* zconflex_destroy is for both reentrant and non-reentrant scanners. */
+int zconflex_destroy  (void)
+{
+    
+    /* Pop the buffer stack, destroying each element. */
+       while(YY_CURRENT_BUFFER){
+               zconf_delete_buffer(YY_CURRENT_BUFFER  );
+               YY_CURRENT_BUFFER_LVALUE = NULL;
+               zconfpop_buffer_state();
+       }
+
+       /* Destroy the stack itself. */
+       zconffree((yy_buffer_stack) );
+       (yy_buffer_stack) = NULL;
+
+    /* Reset the globals. This is important in a non-reentrant scanner so the 
next time
+     * zconflex() is called, initialization will occur. */
+    yy_init_globals( );
+
+    return 0;
+}
+
+/*
+ * Internal utility routines.
+ */
+
+#ifndef yytext_ptr
+static void yy_flex_strncpy (char* s1, yyconst char * s2, int n )
+{
+       register int i;
+       for ( i = 0; i < n; ++i )
+               s1[i] = s2[i];
+}
+#endif
+
+#ifdef YY_NEED_STRLEN
+static int yy_flex_strlen (yyconst char * s )
+{
+       register int n;
+       for ( n = 0; s[n]; ++n )
+               ;
+
+       return n;
+}
+#endif
+
+void *zconfalloc (yy_size_t  size )
+{
+       return (void *) malloc( size );
+}
+
+void *zconfrealloc  (void * ptr, yy_size_t  size )
+{
+       /* The cast to (char *) in the following accommodates both
+        * implementations that use char* generic pointers, and those
+        * that use void* generic pointers.  It works with the latter
+        * because both ANSI C and C++ allow castless assignment from
+        * any pointer type to void*, and deal with argument conversions
+        * as though doing an assignment.
+        */
+       return (void *) realloc( (char *) ptr, size );
+}
+
+void zconffree (void * ptr )
+{
+       free( (char *) ptr );   /* see zconfrealloc() for (char *) cast */
+}
+
+#define YYTABLES_NAME "yytables"
+
+void zconf_starthelp(void)
+{
+       new_string();
+       last_ts = first_ts = 0;
+       BEGIN(HELP);
+}
+
+static void zconf_endhelp(void)
+{
+       zconflval.string = text;
+       BEGIN(INITIAL);
+}
+
+/*
+ * Try to open specified file with following names:
+ * ./name
+ * $(srctree)/name
+ * The latter is used when srctree is separate from objtree
+ * when compiling the kernel.
+ * Return NULL if file is not found.
+ */
+FILE *zconf_fopen(const char *name)
+{
+       char *env, fullname[PATH_MAX+1];
+       FILE *f;
+
+       f = fopen(name, "r");
+       if (!f && name != NULL && name[0] != '/') {
+               env = getenv(SRCTREE);
+               if (env) {
+                       sprintf(fullname, "%s/%s", env, name);
+                       f = fopen(fullname, "r");
+               }
+       }
+       return f;
+}
+
+void zconf_initscan(const char *name)
+{
+       zconfin = zconf_fopen(name);
+       if (!zconfin) {
+               printf("can't find file %s\n", name);
+               exit(1);
+       }
+
+       current_buf = xmalloc(sizeof(*current_buf));
+       memset(current_buf, 0, sizeof(*current_buf));
+
+       current_file = file_lookup(name);
+       current_file->lineno = 1;
+}
+
+void zconf_nextfile(const char *name)
+{
+       struct file *iter;
+       struct file *file = file_lookup(name);
+       struct buffer *buf = xmalloc(sizeof(*buf));
+       memset(buf, 0, sizeof(*buf));
+
+       current_buf->state = YY_CURRENT_BUFFER;
+       zconfin = zconf_fopen(file->name);
+       if (!zconfin) {
+               printf("%s:%d: can't open file \"%s\"\n",
+                   zconf_curname(), zconf_lineno(), file->name);
+               exit(1);
+       }
+       zconf_switch_to_buffer(zconf_create_buffer(zconfin,YY_BUF_SIZE));
+       buf->parent = current_buf;
+       current_buf = buf;
+
+       for (iter = current_file->parent; iter; iter = iter->parent ) {
+               if (!strcmp(current_file->name,iter->name) ) {
+                       printf("%s:%d: recursive inclusion detected. "
+                              "Inclusion path:\n  current file : '%s'\n",
+                              zconf_curname(), zconf_lineno(),
+                              zconf_curname());
+                       iter = current_file->parent;
+                       while (iter && \
+                              strcmp(iter->name,current_file->name)) {
+                               printf("  included from: '%s:%d'\n",
+                                      iter->name, iter->lineno-1);
+                               iter = iter->parent;
+                       }
+                       if (iter)
+                               printf("  included from: '%s:%d'\n",
+                                      iter->name, iter->lineno+1);
+                       exit(1);
+               }
+       }
+       file->lineno = 1;
+       file->parent = current_file;
+       current_file = file;
+}
+
+static void zconf_endfile(void)
+{
+       struct buffer *parent;
+
+       current_file = current_file->parent;
+
+       parent = current_buf->parent;
+       if (parent) {
+               fclose(zconfin);
+               zconf_delete_buffer(YY_CURRENT_BUFFER);
+               zconf_switch_to_buffer(parent->state);
+       }
+       free(current_buf);
+       current_buf = parent;
+}
+
+int zconf_lineno(void)
+{
+       return current_pos.lineno;
+}
+
+const char *zconf_curname(void)
+{
+       return current_pos.file ? current_pos.file->name : "<none>";
+}
+
diff --git a/xen/tools/kconfig/zconf.tab.c_shipped 
b/xen/tools/kconfig/zconf.tab.c_shipped
new file mode 100644
index 0000000..7a4d658
--- /dev/null
+++ b/xen/tools/kconfig/zconf.tab.c_shipped
@@ -0,0 +1,2580 @@
+/* A Bison parser, made by GNU Bison 2.5.1.  */
+
+/* Bison implementation for Yacc-like parsers in C
+   
+      Copyright (C) 1984, 1989-1990, 2000-2012 Free Software Foundation, Inc.
+   
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* As a special exception, you may create a larger work that contains
+   part or all of the Bison parser skeleton and distribute that work
+   under terms of your choice, so long as that work isn't itself a
+   parser generator using the skeleton or a modified version thereof
+   as a parser skeleton.  Alternatively, if you modify or redistribute
+   the parser skeleton itself, you may (at your option) remove this
+   special exception, which will cause the skeleton and the resulting
+   Bison output files to be licensed under the GNU General Public
+   License without this special exception.
+   
+   This special exception was added by the Free Software Foundation in
+   version 2.2 of Bison.  */
+
+/* C LALR(1) parser skeleton written by Richard Stallman, by
+   simplifying the original so-called "semantic" parser.  */
+
+/* All symbols defined below should begin with yy or YY, to avoid
+   infringing on user name space.  This should be done even for local
+   variables, as they might otherwise be expanded by user macros.
+   There are some unavoidable exceptions within include files to
+   define necessary library symbols; they are noted "INFRINGES ON
+   USER NAME SPACE" below.  */
+
+/* Identify Bison output.  */
+#define YYBISON 1
+
+/* Bison version.  */
+#define YYBISON_VERSION "2.5.1"
+
+/* Skeleton name.  */
+#define YYSKELETON_NAME "yacc.c"
+
+/* Pure parsers.  */
+#define YYPURE 0
+
+/* Push parsers.  */
+#define YYPUSH 0
+
+/* Pull parsers.  */
+#define YYPULL 1
+
+/* Using locations.  */
+#define YYLSP_NEEDED 0
+
+/* Substitute the variable and function names.  */
+#define yyparse         zconfparse
+#define yylex           zconflex
+#define yyerror         zconferror
+#define yylval          zconflval
+#define yychar          zconfchar
+#define yydebug         zconfdebug
+#define yynerrs         zconfnerrs
+
+
+/* Copy the first part of user declarations.  */
+
+
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@xxxxxxxxxxxxxx>
+ * Released under the terms of the GNU GPL v2.0.
+ */
+
+#include <ctype.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+
+#include "lkc.h"
+
+#define printd(mask, fmt...) if (cdebug & (mask)) printf(fmt)
+
+#define PRINTD         0x0001
+#define DEBUG_PARSE    0x0002
+
+int cdebug = PRINTD;
+
+extern int zconflex(void);
+static void zconfprint(const char *err, ...);
+static void zconf_error(const char *err, ...);
+static void zconferror(const char *err);
+static bool zconf_endtoken(const struct kconf_id *id, int starttoken, int 
endtoken);
+
+struct symbol *symbol_hash[SYMBOL_HASHSIZE];
+
+static struct menu *current_menu, *current_entry;
+
+
+
+
+# ifndef YY_NULL
+#  if defined __cplusplus && 201103L <= __cplusplus
+#   define YY_NULL nullptr
+#  else
+#   define YY_NULL 0
+#  endif
+# endif
+
+/* Enabling traces.  */
+#ifndef YYDEBUG
+# define YYDEBUG 1
+#endif
+
+/* Enabling verbose error messages.  */
+#ifdef YYERROR_VERBOSE
+# undef YYERROR_VERBOSE
+# define YYERROR_VERBOSE 1
+#else
+# define YYERROR_VERBOSE 0
+#endif
+
+/* Enabling the token table.  */
+#ifndef YYTOKEN_TABLE
+# define YYTOKEN_TABLE 0
+#endif
+
+
+/* Tokens.  */
+#ifndef YYTOKENTYPE
+# define YYTOKENTYPE
+   /* Put the tokens into the symbol table, so that GDB and other debuggers
+      know about them.  */
+   enum yytokentype {
+     T_MAINMENU = 258,
+     T_MENU = 259,
+     T_ENDMENU = 260,
+     T_SOURCE = 261,
+     T_CHOICE = 262,
+     T_ENDCHOICE = 263,
+     T_COMMENT = 264,
+     T_CONFIG = 265,
+     T_MENUCONFIG = 266,
+     T_HELP = 267,
+     T_HELPTEXT = 268,
+     T_IF = 269,
+     T_ENDIF = 270,
+     T_DEPENDS = 271,
+     T_OPTIONAL = 272,
+     T_PROMPT = 273,
+     T_TYPE = 274,
+     T_DEFAULT = 275,
+     T_SELECT = 276,
+     T_RANGE = 277,
+     T_VISIBLE = 278,
+     T_OPTION = 279,
+     T_ON = 280,
+     T_WORD = 281,
+     T_WORD_QUOTE = 282,
+     T_UNEQUAL = 283,
+     T_LESS = 284,
+     T_LESS_EQUAL = 285,
+     T_GREATER = 286,
+     T_GREATER_EQUAL = 287,
+     T_CLOSE_PAREN = 288,
+     T_OPEN_PAREN = 289,
+     T_EOL = 290,
+     T_OR = 291,
+     T_AND = 292,
+     T_EQUAL = 293,
+     T_NOT = 294
+   };
+#endif
+
+
+
+#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
+typedef union YYSTYPE
+{
+
+
+       char *string;
+       struct file *file;
+       struct symbol *symbol;
+       struct expr *expr;
+       struct menu *menu;
+       const struct kconf_id *id;
+
+
+
+} YYSTYPE;
+# define YYSTYPE_IS_TRIVIAL 1
+# define yystype YYSTYPE /* obsolescent; will be withdrawn */
+# define YYSTYPE_IS_DECLARED 1
+#endif
+
+
+/* Copy the second part of user declarations.  */
+
+
+/* Include zconf.hash.c here so it can see the token constants. */
+#include "zconf.hash.c"
+
+
+
+#ifdef short
+# undef short
+#endif
+
+#ifdef YYTYPE_UINT8
+typedef YYTYPE_UINT8 yytype_uint8;
+#else
+typedef unsigned char yytype_uint8;
+#endif
+
+#ifdef YYTYPE_INT8
+typedef YYTYPE_INT8 yytype_int8;
+#elif (defined __STDC__ || defined __C99__FUNC__ \
+     || defined __cplusplus || defined _MSC_VER)
+typedef signed char yytype_int8;
+#else
+typedef short int yytype_int8;
+#endif
+
+#ifdef YYTYPE_UINT16
+typedef YYTYPE_UINT16 yytype_uint16;
+#else
+typedef unsigned short int yytype_uint16;
+#endif
+
+#ifdef YYTYPE_INT16
+typedef YYTYPE_INT16 yytype_int16;
+#else
+typedef short int yytype_int16;
+#endif
+
+#ifndef YYSIZE_T
+# ifdef __SIZE_TYPE__
+#  define YYSIZE_T __SIZE_TYPE__
+# elif defined size_t
+#  define YYSIZE_T size_t
+# elif ! defined YYSIZE_T && (defined __STDC__ || defined __C99__FUNC__ \
+     || defined __cplusplus || defined _MSC_VER)
+#  include <stddef.h> /* INFRINGES ON USER NAME SPACE */
+#  define YYSIZE_T size_t
+# else
+#  define YYSIZE_T unsigned int
+# endif
+#endif
+
+#define YYSIZE_MAXIMUM ((YYSIZE_T) -1)
+
+#ifndef YY_
+# if defined YYENABLE_NLS && YYENABLE_NLS
+#  if ENABLE_NLS
+#   include <libintl.h> /* INFRINGES ON USER NAME SPACE */
+#   define YY_(msgid) dgettext ("bison-runtime", msgid)
+#  endif
+# endif
+# ifndef YY_
+#  define YY_(msgid) msgid
+# endif
+#endif
+
+/* Suppress unused-variable warnings by "using" E.  */
+#if ! defined lint || defined __GNUC__
+# define YYUSE(e) ((void) (e))
+#else
+# define YYUSE(e) /* empty */
+#endif
+
+/* Identity function, used to suppress warnings about constant conditions.  */
+#ifndef lint
+# define YYID(n) (n)
+#else
+#if (defined __STDC__ || defined __C99__FUNC__ \
+     || defined __cplusplus || defined _MSC_VER)
+static int
+YYID (int yyi)
+#else
+static int
+YYID (yyi)
+    int yyi;
+#endif
+{
+  return yyi;
+}
+#endif
+
+#if ! defined yyoverflow || YYERROR_VERBOSE
+
+/* The parser invokes alloca or malloc; define the necessary symbols.  */
+
+# ifdef YYSTACK_USE_ALLOCA
+#  if YYSTACK_USE_ALLOCA
+#   ifdef __GNUC__
+#    define YYSTACK_ALLOC __builtin_alloca
+#   elif defined __BUILTIN_VA_ARG_INCR
+#    include <alloca.h> /* INFRINGES ON USER NAME SPACE */
+#   elif defined _AIX
+#    define YYSTACK_ALLOC __alloca
+#   elif defined _MSC_VER
+#    include <malloc.h> /* INFRINGES ON USER NAME SPACE */
+#    define alloca _alloca
+#   else
+#    define YYSTACK_ALLOC alloca
+#    if ! defined _ALLOCA_H && ! defined EXIT_SUCCESS && (defined __STDC__ || 
defined __C99__FUNC__ \
+     || defined __cplusplus || defined _MSC_VER)
+#     include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
+      /* Use EXIT_SUCCESS as a witness for stdlib.h.  */
+#     ifndef EXIT_SUCCESS
+#      define EXIT_SUCCESS 0
+#     endif
+#    endif
+#   endif
+#  endif
+# endif
+
+# ifdef YYSTACK_ALLOC
+   /* Pacify GCC's `empty if-body' warning.  */
+#  define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0))
+#  ifndef YYSTACK_ALLOC_MAXIMUM
+    /* The OS might guarantee only one guard page at the bottom of the stack,
+       and a page size can be as small as 4096 bytes.  So we cannot safely
+       invoke alloca (N) if N exceeds 4096.  Use a slightly smaller number
+       to allow for a few compiler-allocated temporary stack slots.  */
+#   define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */
+#  endif
+# else
+#  define YYSTACK_ALLOC YYMALLOC
+#  define YYSTACK_FREE YYFREE
+#  ifndef YYSTACK_ALLOC_MAXIMUM
+#   define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM
+#  endif
+#  if (defined __cplusplus && ! defined EXIT_SUCCESS \
+       && ! ((defined YYMALLOC || defined malloc) \
+            && (defined YYFREE || defined free)))
+#   include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
+#   ifndef EXIT_SUCCESS
+#    define EXIT_SUCCESS 0
+#   endif
+#  endif
+#  ifndef YYMALLOC
+#   define YYMALLOC malloc
+#   if ! defined malloc && ! defined EXIT_SUCCESS && (defined __STDC__ || 
defined __C99__FUNC__ \
+     || defined __cplusplus || defined _MSC_VER)
+void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */
+#   endif
+#  endif
+#  ifndef YYFREE
+#   define YYFREE free
+#   if ! defined free && ! defined EXIT_SUCCESS && (defined __STDC__ || 
defined __C99__FUNC__ \
+     || defined __cplusplus || defined _MSC_VER)
+void free (void *); /* INFRINGES ON USER NAME SPACE */
+#   endif
+#  endif
+# endif
+#endif /* ! defined yyoverflow || YYERROR_VERBOSE */
+
+
+#if (! defined yyoverflow \
+     && (! defined __cplusplus \
+        || (defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)))
+
+/* A type that is properly aligned for any stack member.  */
+union yyalloc
+{
+  yytype_int16 yyss_alloc;
+  YYSTYPE yyvs_alloc;
+};
+
+/* The size of the maximum gap between one aligned stack and the next.  */
+# define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1)
+
+/* The size of an array large to enough to hold all stacks, each with
+   N elements.  */
+# define YYSTACK_BYTES(N) \
+     ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE)) \
+      + YYSTACK_GAP_MAXIMUM)
+
+# define YYCOPY_NEEDED 1
+
+/* Relocate STACK from its old location to the new one.  The
+   local variables YYSIZE and YYSTACKSIZE give the old and new number of
+   elements in the stack, and YYPTR gives the new location of the
+   stack.  Advance YYPTR to a properly aligned location for the next
+   stack.  */
+# define YYSTACK_RELOCATE(Stack_alloc, Stack)                          \
+    do                                                                 \
+      {                                                                        
\
+       YYSIZE_T yynewbytes;                                            \
+       YYCOPY (&yyptr->Stack_alloc, Stack, yysize);                    \
+       Stack = &yyptr->Stack_alloc;                                    \
+       yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
+       yyptr += yynewbytes / sizeof (*yyptr);                          \
+      }                                                                        
\
+    while (YYID (0))
+
+#endif
+
+#if defined YYCOPY_NEEDED && YYCOPY_NEEDED
+/* Copy COUNT objects from SRC to DST.  The source and destination do
+   not overlap.  */
+# ifndef YYCOPY
+#  if defined __GNUC__ && 1 < __GNUC__
+#   define YYCOPY(Dst, Src, Count) \
+      __builtin_memcpy (Dst, Src, (Count) * sizeof (*(Src)))
+#  else
+#   define YYCOPY(Dst, Src, Count)              \
+      do                                        \
+        {                                       \
+          YYSIZE_T yyi;                         \
+          for (yyi = 0; yyi < (Count); yyi++)   \
+            (Dst)[yyi] = (Src)[yyi];            \
+        }                                       \
+      while (YYID (0))
+#  endif
+# endif
+#endif /* !YYCOPY_NEEDED */
+
+/* YYFINAL -- State number of the termination state.  */
+#define YYFINAL  11
+/* YYLAST -- Last index in YYTABLE.  */
+#define YYLAST   298
+
+/* YYNTOKENS -- Number of terminals.  */
+#define YYNTOKENS  40
+/* YYNNTS -- Number of nonterminals.  */
+#define YYNNTS  50
+/* YYNRULES -- Number of rules.  */
+#define YYNRULES  122
+/* YYNRULES -- Number of states.  */
+#define YYNSTATES  199
+
+/* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX.  */
+#define YYUNDEFTOK  2
+#define YYMAXUTOK   294
+
+#define YYTRANSLATE(YYX)                                               \
+  ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
+
+/* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX.  */
+static const yytype_uint8 yytranslate[] =
+{
+       0,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     1,     2,     3,     4,
+       5,     6,     7,     8,     9,    10,    11,    12,    13,    14,
+      15,    16,    17,    18,    19,    20,    21,    22,    23,    24,
+      25,    26,    27,    28,    29,    30,    31,    32,    33,    34,
+      35,    36,    37,    38,    39
+};
+
+#if YYDEBUG
+/* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
+   YYRHS.  */
+static const yytype_uint16 yyprhs[] =
+{
+       0,     0,     3,     6,     8,    11,    13,    14,    17,    20,
+      23,    26,    31,    36,    40,    42,    44,    46,    48,    50,
+      52,    54,    56,    58,    60,    62,    64,    66,    68,    72,
+      75,    79,    82,    86,    89,    90,    93,    96,    99,   102,
+     105,   108,   112,   117,   122,   127,   133,   137,   138,   142,
+     143,   146,   150,   153,   155,   159,   160,   163,   166,   169,
+     172,   175,   180,   184,   187,   192,   193,   196,   200,   202,
+     206,   207,   210,   213,   216,   220,   224,   228,   230,   234,
+     235,   238,   241,   244,   248,   252,   255,   258,   261,   262,
+     265,   268,   271,   276,   277,   280,   283,   286,   287,   290,
+     292,   294,   297,   300,   303,   305,   308,   309,   312,   314,
+     318,   322,   326,   330,   334,   338,   342,   345,   349,   353,
+     355,   357,   358
+};
+
+/* YYRHS -- A `-1'-separated list of the rules' RHS.  */
+static const yytype_int8 yyrhs[] =
+{
+      41,     0,    -1,    85,    42,    -1,    42,    -1,    67,    43,
+      -1,    43,    -1,    -1,    43,    45,    -1,    43,    59,    -1,
+      43,    71,    -1,    43,    84,    -1,    43,    26,     1,    35,
+      -1,    43,    44,     1,    35,    -1,    43,     1,    35,    -1,
+      16,    -1,    18,    -1,    19,    -1,    21,    -1,    17,    -1,
+      22,    -1,    20,    -1,    23,    -1,    35,    -1,    65,    -1,
+      75,    -1,    48,    -1,    50,    -1,    73,    -1,    26,     1,
+      35,    -1,     1,    35,    -1,    10,    26,    35,    -1,    47,
+      51,    -1,    11,    26,    35,    -1,    49,    51,    -1,    -1,
+      51,    52,    -1,    51,    53,    -1,    51,    79,    -1,    51,
+      77,    -1,    51,    46,    -1,    51,    35,    -1,    19,    82,
+      35,    -1,    18,    83,    86,    35,    -1,    20,    87,    86,
+      35,    -1,    21,    26,    86,    35,    -1,    22,    88,    88,
+      86,    35,    -1,    24,    54,    35,    -1,    -1,    54,    26,
+      55,    -1,    -1,    38,    83,    -1,     7,    89,    35,    -1,
+      56,    60,    -1,    84,    -1,    57,    62,    58,    -1,    -1,
+      60,    61,    -1,    60,    79,    -1,    60,    77,    -1,    60,
+      35,    -1,    60,    46,    -1,    18,    83,    86,    35,    -1,
+      19,    82,    35,    -1,    17,    35,    -1,    20,    26,    86,
+      35,    -1,    -1,    62,    45,    -1,    14,    87,    85,    -1,
+      84,    -1,    63,    66,    64,    -1,    -1,    66,    45,    -1,
+      66,    71,    -1,    66,    59,    -1,     3,    83,    85,    -1,
+       4,    83,    35,    -1,    68,    80,    78,    -1,    84,    -1,
+      69,    72,    70,    -1,    -1,    72,    45,    -1,    72,    71,
+      -1,    72,    59,    -1,     6,    83,    35,    -1,     9,    83,
+      35,    -1,    74,    78,    -1,    12,    35,    -1,    76,    13,
+      -1,    -1,    78,    79,    -1,    78,    35,    -1,    78,    46,
+      -1,    16,    25,    87,    35,    -1,    -1,    80,    81,    -1,
+      80,    35,    -1,    23,    86,    -1,    -1,    83,    86,    -1,
+      26,    -1,    27,    -1,     5,    35,    -1,     8,    35,    -1,
+      15,    35,    -1,    35,    -1,    85,    35,    -1,    -1,    14,
+      87,    -1,    88,    -1,    88,    29,    88,    -1,    88,    30,
+      88,    -1,    88,    31,    88,    -1,    88,    32,    88,    -1,
+      88,    38,    88,    -1,    88,    28,    88,    -1,    34,    87,
+      33,    -1,    39,    87,    -1,    87,    36,    87,    -1,    87,
+      37,    87,    -1,    26,    -1,    27,    -1,    -1,    26,    -1
+};
+
+/* YYRLINE[YYN] -- source line where rule number YYN was defined.  */
+static const yytype_uint16 yyrline[] =
+{
+       0,   108,   108,   108,   110,   110,   112,   114,   115,   116,
+     117,   118,   119,   123,   127,   127,   127,   127,   127,   127,
+     127,   127,   131,   132,   133,   134,   135,   136,   140,   141,
+     147,   155,   161,   169,   179,   181,   182,   183,   184,   185,
+     186,   189,   197,   203,   213,   219,   225,   228,   230,   241,
+     242,   247,   256,   261,   269,   272,   274,   275,   276,   277,
+     278,   281,   287,   298,   304,   314,   316,   321,   329,   337,
+     340,   342,   343,   344,   349,   356,   363,   368,   376,   379,
+     381,   382,   383,   386,   394,   401,   408,   414,   421,   423,
+     424,   425,   428,   436,   438,   439,   442,   449,   451,   456,
+     457,   460,   461,   462,   466,   467,   470,   471,   474,   475,
+     476,   477,   478,   479,   480,   481,   482,   483,   484,   487,
+     488,   491,   492
+};
+#endif
+
+#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
+/* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
+   First, the terminals, then, starting at YYNTOKENS, nonterminals.  */
+static const char *const yytname[] =
+{
+  "$end", "error", "$undefined", "T_MAINMENU", "T_MENU", "T_ENDMENU",
+  "T_SOURCE", "T_CHOICE", "T_ENDCHOICE", "T_COMMENT", "T_CONFIG",
+  "T_MENUCONFIG", "T_HELP", "T_HELPTEXT", "T_IF", "T_ENDIF", "T_DEPENDS",
+  "T_OPTIONAL", "T_PROMPT", "T_TYPE", "T_DEFAULT", "T_SELECT", "T_RANGE",
+  "T_VISIBLE", "T_OPTION", "T_ON", "T_WORD", "T_WORD_QUOTE", "T_UNEQUAL",
+  "T_LESS", "T_LESS_EQUAL", "T_GREATER", "T_GREATER_EQUAL",
+  "T_CLOSE_PAREN", "T_OPEN_PAREN", "T_EOL", "T_OR", "T_AND", "T_EQUAL",
+  "T_NOT", "$accept", "input", "start", "stmt_list", "option_name",
+  "common_stmt", "option_error", "config_entry_start", "config_stmt",
+  "menuconfig_entry_start", "menuconfig_stmt", "config_option_list",
+  "config_option", "symbol_option", "symbol_option_list",
+  "symbol_option_arg", "choice", "choice_entry", "choice_end",
+  "choice_stmt", "choice_option_list", "choice_option", "choice_block",
+  "if_entry", "if_end", "if_stmt", "if_block", "mainmenu_stmt", "menu",
+  "menu_entry", "menu_end", "menu_stmt", "menu_block", "source_stmt",
+  "comment", "comment_stmt", "help_start", "help", "depends_list",
+  "depends", "visibility_list", "visible", "prompt_stmt_opt", "prompt",
+  "end", "nl", "if_expr", "expr", "symbol", "word_opt", YY_NULL
+};
+#endif
+
+# ifdef YYPRINT
+/* YYTOKNUM[YYLEX-NUM] -- Internal token number corresponding to
+   token YYLEX-NUM.  */
+static const yytype_uint16 yytoknum[] =
+{
+       0,   256,   257,   258,   259,   260,   261,   262,   263,   264,
+     265,   266,   267,   268,   269,   270,   271,   272,   273,   274,
+     275,   276,   277,   278,   279,   280,   281,   282,   283,   284,
+     285,   286,   287,   288,   289,   290,   291,   292,   293,   294
+};
+# endif
+
+/* YYR1[YYN] -- Symbol number of symbol that rule YYN derives.  */
+static const yytype_uint8 yyr1[] =
+{
+       0,    40,    41,    41,    42,    42,    43,    43,    43,    43,
+      43,    43,    43,    43,    44,    44,    44,    44,    44,    44,
+      44,    44,    45,    45,    45,    45,    45,    45,    46,    46,
+      47,    48,    49,    50,    51,    51,    51,    51,    51,    51,
+      51,    52,    52,    52,    52,    52,    53,    54,    54,    55,
+      55,    56,    57,    58,    59,    60,    60,    60,    60,    60,
+      60,    61,    61,    61,    61,    62,    62,    63,    64,    65,
+      66,    66,    66,    66,    67,    68,    69,    70,    71,    72,
+      72,    72,    72,    73,    74,    75,    76,    77,    78,    78,
+      78,    78,    79,    80,    80,    80,    81,    82,    82,    83,
+      83,    84,    84,    84,    85,    85,    86,    86,    87,    87,
+      87,    87,    87,    87,    87,    87,    87,    87,    87,    88,
+      88,    89,    89
+};
+
+/* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN.  */
+static const yytype_uint8 yyr2[] =
+{
+       0,     2,     2,     1,     2,     1,     0,     2,     2,     2,
+       2,     4,     4,     3,     1,     1,     1,     1,     1,     1,
+       1,     1,     1,     1,     1,     1,     1,     1,     3,     2,
+       3,     2,     3,     2,     0,     2,     2,     2,     2,     2,
+       2,     3,     4,     4,     4,     5,     3,     0,     3,     0,
+       2,     3,     2,     1,     3,     0,     2,     2,     2,     2,
+       2,     4,     3,     2,     4,     0,     2,     3,     1,     3,
+       0,     2,     2,     2,     3,     3,     3,     1,     3,     0,
+       2,     2,     2,     3,     3,     2,     2,     2,     0,     2,
+       2,     2,     4,     0,     2,     2,     2,     0,     2,     1,
+       1,     2,     2,     2,     1,     2,     0,     2,     1,     3,
+       3,     3,     3,     3,     3,     3,     2,     3,     3,     1,
+       1,     0,     1
+};
+
+/* YYDEFACT[STATE-NAME] -- Default reduction number in state STATE-NUM.
+   Performed when YYTABLE doesn't specify something else to do.  Zero
+   means the default is an error.  */
+static const yytype_uint8 yydefact[] =
+{
+       6,     0,   104,     0,     3,     0,     6,     6,    99,   100,
+       0,     1,     0,     0,     0,     0,   121,     0,     0,     0,
+       0,     0,     0,    14,    18,    15,    16,    20,    17,    19,
+      21,     0,    22,     0,     7,    34,    25,    34,    26,    55,
+      65,     8,    70,    23,    93,    79,     9,    27,    88,    24,
+      10,     0,   105,     2,    74,    13,     0,   101,     0,   122,
+       0,   102,     0,     0,     0,   119,   120,     0,     0,     0,
+     108,   103,     0,     0,     0,     0,     0,     0,     0,    88,
+       0,     0,    75,    83,    51,    84,    30,    32,     0,   116,
+       0,     0,    67,     0,     0,     0,     0,     0,     0,    11,
+      12,     0,     0,     0,     0,    97,     0,     0,     0,    47,
+       0,    40,    39,    35,    36,     0,    38,    37,     0,     0,
+      97,     0,    59,    60,    56,    58,    57,    66,    54,    53,
+      71,    73,    69,    72,    68,   106,    95,     0,    94,    80,
+      82,    78,    81,    77,    90,    91,    89,   115,   117,   118,
+     114,   109,   110,   111,   112,   113,    29,    86,     0,   106,
+       0,   106,   106,   106,     0,     0,     0,    87,    63,   106,
+       0,   106,     0,    96,     0,     0,    41,    98,     0,     0,
+     106,    49,    46,    28,     0,    62,     0,   107,    92,    42,
+      43,    44,     0,     0,    48,    61,    64,    45,    50
+};
+
+/* YYDEFGOTO[NTERM-NUM].  */
+static const yytype_int16 yydefgoto[] =
+{
+      -1,     3,     4,     5,    33,    34,   112,    35,    36,    37,
+      38,    74,   113,   114,   165,   194,    39,    40,   128,    41,
+      76,   124,    77,    42,   132,    43,    78,     6,    44,    45,
+     141,    46,    80,    47,    48,    49,   115,   116,    81,   117,
+      79,   138,   160,   161,    50,     7,   173,    69,    70,    60
+};
+
+/* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
+   STATE-NUM.  */
+#define YYPACT_NINF -91
+static const yytype_int16 yypact[] =
+{
+      19,    37,   -91,    13,   -91,    79,   -91,    20,   -91,   -91,
+     -16,   -91,    21,    37,    25,    37,    41,    36,    37,    78,
+      83,    31,    56,   -91,   -91,   -91,   -91,   -91,   -91,   -91,
+     -91,   116,   -91,   127,   -91,   -91,   -91,   -91,   -91,   -91,
+     -91,   -91,   -91,   -91,   -91,   -91,   -91,   -91,   -91,   -91,
+     -91,   147,   -91,   -91,   105,   -91,   109,   -91,   111,   -91,
+     114,   -91,   136,   137,   142,   -91,   -91,    31,    31,    76,
+     254,   -91,   143,   146,    27,   115,   207,   258,   243,   -14,
+     243,   179,   -91,   -91,   -91,   -91,   -91,   -91,    -7,   -91,
+      31,    31,   105,    51,    51,    51,    51,    51,    51,   -91,
+     -91,   156,   168,   181,    37,    37,    31,   178,    51,   -91,
+     206,   -91,   -91,   -91,   -91,   196,   -91,   -91,   175,    37,
+      37,   185,   -91,   -91,   -91,   -91,   -91,   -91,   -91,   -91,
+     -91,   -91,   -91,   -91,   -91,   214,   -91,   230,   -91,   -91,
+     -91,   -91,   -91,   -91,   -91,   -91,   -91,   -91,   183,   -91,
+     -91,   -91,   -91,   -91,   -91,   -91,   -91,   -91,    31,   214,
+     194,   214,    45,   214,    51,    26,   195,   -91,   -91,   214,
+     197,   214,    31,   -91,   139,   208,   -91,   -91,   220,   224,
+     214,   222,   -91,   -91,   226,   -91,   227,   123,   -91,   -91,
+     -91,   -91,   235,    37,   -91,   -91,   -91,   -91,   -91
+};
+
+/* YYPGOTO[NTERM-NUM].  */
+static const yytype_int16 yypgoto[] =
+{
+     -91,   -91,   264,   268,   -91,    30,   -65,   -91,   -91,   -91,
+     -91,   238,   -91,   -91,   -91,   -91,   -91,   -91,   -91,   -12,
+     -91,   -91,   -91,   -91,   -91,   -91,   -91,   -91,   -91,   -91,
+     -91,    -5,   -91,   -91,   -91,   -91,   -91,   200,   209,   -61,
+     -91,   -91,   170,    -1,    65,     0,   118,   -66,   -90,   -91
+};
+
+/* YYTABLE[YYPACT[STATE-NUM]].  What to do in state STATE-NUM.  If
+   positive, shift that token.  If negative, reduce the rule which
+   number is the opposite.  If YYTABLE_NINF, syntax error.  */
+#define YYTABLE_NINF -86
+static const yytype_int16 yytable[] =
+{
+      10,    88,    89,   150,   151,   152,   153,   154,   155,   135,
+      54,   123,    56,    11,    58,   126,   145,    62,   164,     2,
+     146,   136,     1,     1,   148,   149,   147,   -31,   101,    90,
+      91,   -31,   -31,   -31,   -31,   -31,   -31,   -31,   -31,   102,
+     162,   -31,   -31,   103,   -31,   104,   105,   106,   107,   108,
+     -31,   109,   181,   110,     2,    52,    55,    65,    66,   172,
+      57,   182,   111,     8,     9,    67,   131,    59,   140,    92,
+      68,    61,   145,   133,   180,   142,   146,    65,    66,    -5,
+      12,    90,    91,    13,    14,    15,    16,    17,    18,    19,
+      20,    71,   174,    21,    22,    23,    24,    25,    26,    27,
+      28,    29,    30,   159,    63,    31,   187,   127,   130,    64,
+     139,     2,    90,    91,    32,   -33,   101,    72,   169,   -33,
+     -33,   -33,   -33,   -33,   -33,   -33,   -33,   102,    73,   -33,
+     -33,   103,   -33,   104,   105,   106,   107,   108,   -33,   109,
+      52,   110,   129,   134,    82,   143,    83,    -4,    12,    84,
+     111,    13,    14,    15,    16,    17,    18,    19,    20,    90,
+      91,    21,    22,    23,    24,    25,    26,    27,    28,    29,
+      30,    85,    86,    31,   188,    90,    91,    87,    99,   -85,
+     101,   100,    32,   -85,   -85,   -85,   -85,   -85,   -85,   -85,
+     -85,   156,   198,   -85,   -85,   103,   -85,   -85,   -85,   -85,
+     -85,   -85,   -85,   157,   163,   110,   158,   166,   101,   167,
+     168,   171,   -52,   -52,   144,   -52,   -52,   -52,   -52,   102,
+      91,   -52,   -52,   103,   118,   119,   120,   121,   172,   176,
+     183,   101,   185,   110,   -76,   -76,   -76,   -76,   -76,   -76,
+     -76,   -76,   122,   189,   -76,   -76,   103,    13,    14,    15,
+      16,    17,    18,    19,    20,   190,   110,    21,    22,   191,
+     193,   195,   196,    14,    15,   144,    17,    18,    19,    20,
+     197,    53,    21,    22,    51,    75,   125,   175,    32,   177,
+     178,   179,    93,    94,    95,    96,    97,   184,   137,   186,
+     170,     0,    98,    32,     0,     0,     0,     0,   192
+};
+
+#define yypact_value_is_default(yystate) \
+  ((yystate) == (-91))
+
+#define yytable_value_is_error(yytable_value) \
+  YYID (0)
+
+static const yytype_int16 yycheck[] =
+{
+       1,    67,    68,    93,    94,    95,    96,    97,    98,    23,
+      10,    76,    13,     0,    15,    76,    81,    18,   108,    35,
+      81,    35,     3,     3,    90,    91,    33,     0,     1,    36,
+      37,     4,     5,     6,     7,     8,     9,    10,    11,    12,
+     106,    14,    15,    16,    17,    18,    19,    20,    21,    22,
+      23,    24,    26,    26,    35,    35,    35,    26,    27,    14,
+      35,    35,    35,    26,    27,    34,    78,    26,    80,    69,
+      39,    35,   137,    78,   164,    80,   137,    26,    27,     0,
+       1,    36,    37,     4,     5,     6,     7,     8,     9,    10,
+      11,    35,   158,    14,    15,    16,    17,    18,    19,    20,
+      21,    22,    23,   104,    26,    26,   172,    77,    78,    26,
+      80,    35,    36,    37,    35,     0,     1,     1,   119,     4,
+       5,     6,     7,     8,     9,    10,    11,    12,     1,    14,
+      15,    16,    17,    18,    19,    20,    21,    22,    23,    24,
+      35,    26,    77,    78,    35,    80,    35,     0,     1,    35,
+      35,     4,     5,     6,     7,     8,     9,    10,    11,    36,
+      37,    14,    15,    16,    17,    18,    19,    20,    21,    22,
+      23,    35,    35,    26,    35,    36,    37,    35,    35,     0,
+       1,    35,    35,     4,     5,     6,     7,     8,     9,    10,
+      11,    35,   193,    14,    15,    16,    17,    18,    19,    20,
+      21,    22,    23,    35,    26,    26,    25,     1,     1,    13,
+      35,    26,     5,     6,    35,     8,     9,    10,    11,    12,
+      37,    14,    15,    16,    17,    18,    19,    20,    14,    35,
+      35,     1,    35,    26,     4,     5,     6,     7,     8,     9,
+      10,    11,    35,    35,    14,    15,    16,     4,     5,     6,
+       7,     8,     9,    10,    11,    35,    26,    14,    15,    35,
+      38,    35,    35,     5,     6,    35,     8,     9,    10,    11,
+      35,     7,    14,    15,     6,    37,    76,   159,    35,   161,
+     162,   163,    28,    29,    30,    31,    32,   169,    79,   171,
+     120,    -1,    38,    35,    -1,    -1,    -1,    -1,   180
+};
+
+/* YYSTOS[STATE-NUM] -- The (internal number of the) accessing
+   symbol of state STATE-NUM.  */
+static const yytype_uint8 yystos[] =
+{
+       0,     3,    35,    41,    42,    43,    67,    85,    26,    27,
+      83,     0,     1,     4,     5,     6,     7,     8,     9,    10,
+      11,    14,    15,    16,    17,    18,    19,    20,    21,    22,
+      23,    26,    35,    44,    45,    47,    48,    49,    50,    56,
+      57,    59,    63,    65,    68,    69,    71,    73,    74,    75,
+      84,    43,    35,    42,    85,    35,    83,    35,    83,    26,
+      89,    35,    83,    26,    26,    26,    27,    34,    39,    87,
+      88,    35,     1,     1,    51,    51,    60,    62,    66,    80,
+      72,    78,    35,    35,    35,    35,    35,    35,    87,    87,
+      36,    37,    85,    28,    29,    30,    31,    32,    38,    35,
+      35,     1,    12,    16,    18,    19,    20,    21,    22,    24,
+      26,    35,    46,    52,    53,    76,    77,    79,    17,    18,
+      19,    20,    35,    46,    61,    77,    79,    45,    58,    84,
+      45,    59,    64,    71,    84,    23,    35,    78,    81,    45,
+      59,    70,    71,    84,    35,    46,    79,    33,    87,    87,
+      88,    88,    88,    88,    88,    88,    35,    35,    25,    83,
+      82,    83,    87,    26,    88,    54,     1,    13,    35,    83,
+      82,    26,    14,    86,    87,    86,    35,    86,    86,    86,
+      88,    26,    35,    35,    86,    35,    86,    87,    35,    35,
+      35,    35,    86,    38,    55,    35,    35,    35,    83
+};
+
+#define yyerrok                (yyerrstatus = 0)
+#define yyclearin      (yychar = YYEMPTY)
+#define YYEMPTY                (-2)
+#define YYEOF          0
+
+#define YYACCEPT       goto yyacceptlab
+#define YYABORT                goto yyabortlab
+#define YYERROR                goto yyerrorlab
+
+
+/* Like YYERROR except do call yyerror.  This remains here temporarily
+   to ease the transition to the new meaning of YYERROR, for GCC.
+   Once GCC version 2 has supplanted version 1, this can go.  However,
+   YYFAIL appears to be in use.  Nevertheless, it is formally deprecated
+   in Bison 2.4.2's NEWS entry, where a plan to phase it out is
+   discussed.  */
+
+#define YYFAIL         goto yyerrlab
+#if defined YYFAIL
+  /* This is here to suppress warnings from the GCC cpp's
+     -Wunused-macros.  Normally we don't worry about that warning, but
+     some users do, and we want to make it easy for users to remove
+     YYFAIL uses, which will produce warnings from Bison 2.5.  */
+#endif
+
+#define YYRECOVERING()  (!!yyerrstatus)
+
+#define YYBACKUP(Token, Value)                                  \
+do                                                              \
+  if (yychar == YYEMPTY)                                        \
+    {                                                           \
+      yychar = (Token);                                         \
+      yylval = (Value);                                         \
+      YYPOPSTACK (yylen);                                       \
+      yystate = *yyssp;                                         \
+      goto yybackup;                                            \
+    }                                                           \
+  else                                                          \
+    {                                                           \
+      yyerror (YY_("syntax error: cannot back up")); \
+      YYERROR;                                                 \
+    }                                                          \
+while (YYID (0))
+
+
+#define YYTERROR       1
+#define YYERRCODE      256
+
+
+/* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
+   If N is 0, then set CURRENT to the empty location which ends
+   the previous symbol: RHS[0] (always defined).  */
+
+#define YYRHSLOC(Rhs, K) ((Rhs)[K])
+#ifndef YYLLOC_DEFAULT
+# define YYLLOC_DEFAULT(Current, Rhs, N)                               \
+    do                                                                 \
+      if (YYID (N))                                                    \
+       {                                                               \
+         (Current).first_line   = YYRHSLOC (Rhs, 1).first_line;        \
+         (Current).first_column = YYRHSLOC (Rhs, 1).first_column;      \
+         (Current).last_line    = YYRHSLOC (Rhs, N).last_line;         \
+         (Current).last_column  = YYRHSLOC (Rhs, N).last_column;       \
+       }                                                               \
+      else                                                             \
+       {                                                               \
+         (Current).first_line   = (Current).last_line   =              \
+           YYRHSLOC (Rhs, 0).last_line;                                \
+         (Current).first_column = (Current).last_column =              \
+           YYRHSLOC (Rhs, 0).last_column;                              \
+       }                                                               \
+    while (YYID (0))
+#endif
+
+
+/* This macro is provided for backward compatibility. */
+
+#ifndef YY_LOCATION_PRINT
+# define YY_LOCATION_PRINT(File, Loc) ((void) 0)
+#endif
+
+
+/* YYLEX -- calling `yylex' with the right arguments.  */
+
+#ifdef YYLEX_PARAM
+# define YYLEX yylex (YYLEX_PARAM)
+#else
+# define YYLEX yylex ()
+#endif
+
+/* Enable debugging if requested.  */
+#if YYDEBUG
+
+# ifndef YYFPRINTF
+#  include <stdio.h> /* INFRINGES ON USER NAME SPACE */
+#  define YYFPRINTF fprintf
+# endif
+
+# define YYDPRINTF(Args)                       \
+do {                                           \
+  if (yydebug)                                 \
+    YYFPRINTF Args;                            \
+} while (YYID (0))
+
+# define YY_SYMBOL_PRINT(Title, Type, Value, Location)                   \
+do {                                                                     \
+  if (yydebug)                                                           \
+    {                                                                    \
+      YYFPRINTF (stderr, "%s ", Title);                                        
  \
+      yy_symbol_print (stderr,                                           \
+                 Type, Value); \
+      YYFPRINTF (stderr, "\n");                                                
  \
+    }                                                                    \
+} while (YYID (0))
+
+
+/*--------------------------------.
+| Print this symbol on YYOUTPUT.  |
+`--------------------------------*/
+
+/*ARGSUSED*/
+#if (defined __STDC__ || defined __C99__FUNC__ \
+     || defined __cplusplus || defined _MSC_VER)
+static void
+yy_symbol_value_print (FILE *yyoutput, int yytype, YYSTYPE const * const 
yyvaluep)
+#else
+static void
+yy_symbol_value_print (yyoutput, yytype, yyvaluep)
+    FILE *yyoutput;
+    int yytype;
+    YYSTYPE const * const yyvaluep;
+#endif
+{
+  FILE *yyo = yyoutput;
+  YYUSE (yyo);
+  if (!yyvaluep)
+    return;
+# ifdef YYPRINT
+  if (yytype < YYNTOKENS)
+    YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
+# else
+  YYUSE (yyoutput);
+# endif
+  switch (yytype)
+    {
+      default:
+       break;
+    }
+}
+
+
+/*--------------------------------.
+| Print this symbol on YYOUTPUT.  |
+`--------------------------------*/
+
+#if (defined __STDC__ || defined __C99__FUNC__ \
+     || defined __cplusplus || defined _MSC_VER)
+static void
+yy_symbol_print (FILE *yyoutput, int yytype, YYSTYPE const * const yyvaluep)
+#else
+static void
+yy_symbol_print (yyoutput, yytype, yyvaluep)
+    FILE *yyoutput;
+    int yytype;
+    YYSTYPE const * const yyvaluep;
+#endif
+{
+  if (yytype < YYNTOKENS)
+    YYFPRINTF (yyoutput, "token %s (", yytname[yytype]);
+  else
+    YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]);
+
+  yy_symbol_value_print (yyoutput, yytype, yyvaluep);
+  YYFPRINTF (yyoutput, ")");
+}
+
+/*------------------------------------------------------------------.
+| yy_stack_print -- Print the state stack from its BOTTOM up to its |
+| TOP (included).                                                   |
+`------------------------------------------------------------------*/
+
+#if (defined __STDC__ || defined __C99__FUNC__ \
+     || defined __cplusplus || defined _MSC_VER)
+static void
+yy_stack_print (yytype_int16 *yybottom, yytype_int16 *yytop)
+#else
+static void
+yy_stack_print (yybottom, yytop)
+    yytype_int16 *yybottom;
+    yytype_int16 *yytop;
+#endif
+{
+  YYFPRINTF (stderr, "Stack now");
+  for (; yybottom <= yytop; yybottom++)
+    {
+      int yybot = *yybottom;
+      YYFPRINTF (stderr, " %d", yybot);
+    }
+  YYFPRINTF (stderr, "\n");
+}
+
+# define YY_STACK_PRINT(Bottom, Top)                           \
+do {                                                           \
+  if (yydebug)                                                 \
+    yy_stack_print ((Bottom), (Top));                          \
+} while (YYID (0))
+
+
+/*------------------------------------------------.
+| Report that the YYRULE is going to be reduced.  |
+`------------------------------------------------*/
+
+#if (defined __STDC__ || defined __C99__FUNC__ \
+     || defined __cplusplus || defined _MSC_VER)
+static void
+yy_reduce_print (YYSTYPE *yyvsp, int yyrule)
+#else
+static void
+yy_reduce_print (yyvsp, yyrule)
+    YYSTYPE *yyvsp;
+    int yyrule;
+#endif
+{
+  int yynrhs = yyr2[yyrule];
+  int yyi;
+  unsigned long int yylno = yyrline[yyrule];
+  YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n",
+            yyrule - 1, yylno);
+  /* The symbols being reduced.  */
+  for (yyi = 0; yyi < yynrhs; yyi++)
+    {
+      YYFPRINTF (stderr, "   $%d = ", yyi + 1);
+      yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi],
+                      &(yyvsp[(yyi + 1) - (yynrhs)])
+                                      );
+      YYFPRINTF (stderr, "\n");
+    }
+}
+
+# define YY_REDUCE_PRINT(Rule)         \
+do {                                   \
+  if (yydebug)                         \
+    yy_reduce_print (yyvsp, Rule); \
+} while (YYID (0))
+
+/* Nonzero means print parse trace.  It is left uninitialized so that
+   multiple parsers can coexist.  */
+int yydebug;
+#else /* !YYDEBUG */
+# define YYDPRINTF(Args)
+# define YY_SYMBOL_PRINT(Title, Type, Value, Location)
+# define YY_STACK_PRINT(Bottom, Top)
+# define YY_REDUCE_PRINT(Rule)
+#endif /* !YYDEBUG */
+
+
+/* YYINITDEPTH -- initial size of the parser's stacks.  */
+#ifndef        YYINITDEPTH
+# define YYINITDEPTH 200
+#endif
+
+/* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
+   if the built-in stack extension method is used).
+
+   Do not make this value too large; the results are undefined if
+   YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH)
+   evaluated with infinite-precision integer arithmetic.  */
+
+#ifndef YYMAXDEPTH
+# define YYMAXDEPTH 10000
+#endif
+
+
+#if YYERROR_VERBOSE
+
+# ifndef yystrlen
+#  if defined __GLIBC__ && defined _STRING_H
+#   define yystrlen strlen
+#  else
+/* Return the length of YYSTR.  */
+#if (defined __STDC__ || defined __C99__FUNC__ \
+     || defined __cplusplus || defined _MSC_VER)
+static YYSIZE_T
+yystrlen (const char *yystr)
+#else
+static YYSIZE_T
+yystrlen (yystr)
+    const char *yystr;
+#endif
+{
+  YYSIZE_T yylen;
+  for (yylen = 0; yystr[yylen]; yylen++)
+    continue;
+  return yylen;
+}
+#  endif
+# endif
+
+# ifndef yystpcpy
+#  if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
+#   define yystpcpy stpcpy
+#  else
+/* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
+   YYDEST.  */
+#if (defined __STDC__ || defined __C99__FUNC__ \
+     || defined __cplusplus || defined _MSC_VER)
+static char *
+yystpcpy (char *yydest, const char *yysrc)
+#else
+static char *
+yystpcpy (yydest, yysrc)
+    char *yydest;
+    const char *yysrc;
+#endif
+{
+  char *yyd = yydest;
+  const char *yys = yysrc;
+
+  while ((*yyd++ = *yys++) != '\0')
+    continue;
+
+  return yyd - 1;
+}
+#  endif
+# endif
+
+# ifndef yytnamerr
+/* Copy to YYRES the contents of YYSTR after stripping away unnecessary
+   quotes and backslashes, so that it's suitable for yyerror.  The
+   heuristic is that double-quoting is unnecessary unless the string
+   contains an apostrophe, a comma, or backslash (other than
+   backslash-backslash).  YYSTR is taken from yytname.  If YYRES is
+   null, do not copy; instead, return the length of what the result
+   would have been.  */
+static YYSIZE_T
+yytnamerr (char *yyres, const char *yystr)
+{
+  if (*yystr == '"')
+    {
+      YYSIZE_T yyn = 0;
+      char const *yyp = yystr;
+
+      for (;;)
+       switch (*++yyp)
+         {
+         case '\'':
+         case ',':
+           goto do_not_strip_quotes;
+
+         case '\\':
+           if (*++yyp != '\\')
+             goto do_not_strip_quotes;
+           /* Fall through.  */
+         default:
+           if (yyres)
+             yyres[yyn] = *yyp;
+           yyn++;
+           break;
+
+         case '"':
+           if (yyres)
+             yyres[yyn] = '\0';
+           return yyn;
+         }
+    do_not_strip_quotes: ;
+    }
+
+  if (! yyres)
+    return yystrlen (yystr);
+
+  return yystpcpy (yyres, yystr) - yyres;
+}
+# endif
+
+/* Copy into *YYMSG, which is of size *YYMSG_ALLOC, an error message
+   about the unexpected token YYTOKEN for the state stack whose top is
+   YYSSP.
+
+   Return 0 if *YYMSG was successfully written.  Return 1 if *YYMSG is
+   not large enough to hold the message.  In that case, also set
+   *YYMSG_ALLOC to the required number of bytes.  Return 2 if the
+   required number of bytes is too large to store.  */
+static int
+yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
+                yytype_int16 *yyssp, int yytoken)
+{
+  YYSIZE_T yysize0 = yytnamerr (YY_NULL, yytname[yytoken]);
+  YYSIZE_T yysize = yysize0;
+  YYSIZE_T yysize1;
+  enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
+  /* Internationalized format string. */
+  const char *yyformat = YY_NULL;
+  /* Arguments of yyformat. */
+  char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
+  /* Number of reported tokens (one for the "unexpected", one per
+     "expected"). */
+  int yycount = 0;
+
+  /* There are many possibilities here to consider:
+     - Assume YYFAIL is not used.  It's too flawed to consider.  See
+       <http://lists.gnu.org/archive/html/bison-patches/2009-12/msg00024.html>
+       for details.  YYERROR is fine as it does not invoke this
+       function.
+     - If this state is a consistent state with a default action, then
+       the only way this function was invoked is if the default action
+       is an error action.  In that case, don't check for expected
+       tokens because there are none.
+     - The only way there can be no lookahead present (in yychar) is if
+       this state is a consistent state with a default action.  Thus,
+       detecting the absence of a lookahead is sufficient to determine
+       that there is no unexpected or expected token to report.  In that
+       case, just report a simple "syntax error".
+     - Don't assume there isn't a lookahead just because this state is a
+       consistent state with a default action.  There might have been a
+       previous inconsistent state, consistent state with a non-default
+       action, or user semantic action that manipulated yychar.
+     - Of course, the expected token list depends on states to have
+       correct lookahead information, and it depends on the parser not
+       to perform extra reductions after fetching a lookahead from the
+       scanner and before detecting a syntax error.  Thus, state merging
+       (from LALR or IELR) and default reductions corrupt the expected
+       token list.  However, the list is correct for canonical LR with
+       one exception: it will still contain any token that will not be
+       accepted due to an error action in a later state.
+  */
+  if (yytoken != YYEMPTY)
+    {
+      int yyn = yypact[*yyssp];
+      yyarg[yycount++] = yytname[yytoken];
+      if (!yypact_value_is_default (yyn))
+        {
+          /* Start YYX at -YYN if negative to avoid negative indexes in
+             YYCHECK.  In other words, skip the first -YYN actions for
+             this state because they are default actions.  */
+          int yyxbegin = yyn < 0 ? -yyn : 0;
+          /* Stay within bounds of both yycheck and yytname.  */
+          int yychecklim = YYLAST - yyn + 1;
+          int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
+          int yyx;
+
+          for (yyx = yyxbegin; yyx < yyxend; ++yyx)
+            if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR
+                && !yytable_value_is_error (yytable[yyx + yyn]))
+              {
+                if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
+                  {
+                    yycount = 1;
+                    yysize = yysize0;
+                    break;
+                  }
+                yyarg[yycount++] = yytname[yyx];
+                yysize1 = yysize + yytnamerr (YY_NULL, yytname[yyx]);
+                if (! (yysize <= yysize1
+                       && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
+                  return 2;
+                yysize = yysize1;
+              }
+        }
+    }
+
+  switch (yycount)
+    {
+# define YYCASE_(N, S)                      \
+      case N:                               \
+        yyformat = S;                       \
+      break
+      YYCASE_(0, YY_("syntax error"));
+      YYCASE_(1, YY_("syntax error, unexpected %s"));
+      YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
+      YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
+      YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
+      YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or 
%s"));
+# undef YYCASE_
+    }
+
+  yysize1 = yysize + yystrlen (yyformat);
+  if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
+    return 2;
+  yysize = yysize1;
+
+  if (*yymsg_alloc < yysize)
+    {
+      *yymsg_alloc = 2 * yysize;
+      if (! (yysize <= *yymsg_alloc
+             && *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM))
+        *yymsg_alloc = YYSTACK_ALLOC_MAXIMUM;
+      return 1;
+    }
+
+  /* Avoid sprintf, as that infringes on the user's name space.
+     Don't have undefined behavior even if the translation
+     produced a string with the wrong number of "%s"s.  */
+  {
+    char *yyp = *yymsg;
+    int yyi = 0;
+    while ((*yyp = *yyformat) != '\0')
+      if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount)
+        {
+          yyp += yytnamerr (yyp, yyarg[yyi++]);
+          yyformat += 2;
+        }
+      else
+        {
+          yyp++;
+          yyformat++;
+        }
+  }
+  return 0;
+}
+#endif /* YYERROR_VERBOSE */
+
+/*-----------------------------------------------.
+| Release the memory associated to this symbol.  |
+`-----------------------------------------------*/
+
+/*ARGSUSED*/
+#if (defined __STDC__ || defined __C99__FUNC__ \
+     || defined __cplusplus || defined _MSC_VER)
+static void
+yydestruct (const char *yymsg, int yytype, YYSTYPE *yyvaluep)
+#else
+static void
+yydestruct (yymsg, yytype, yyvaluep)
+    const char *yymsg;
+    int yytype;
+    YYSTYPE *yyvaluep;
+#endif
+{
+  YYUSE (yyvaluep);
+
+  if (!yymsg)
+    yymsg = "Deleting";
+  YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
+
+  switch (yytype)
+    {
+      case 57: /* "choice_entry" */
+
+       {
+       fprintf(stderr, "%s:%d: missing end statement for this entry\n",
+               (yyvaluep->menu)->file->name, (yyvaluep->menu)->lineno);
+       if (current_menu == (yyvaluep->menu))
+               menu_end_menu();
+};
+
+       break;
+      case 63: /* "if_entry" */
+
+       {
+       fprintf(stderr, "%s:%d: missing end statement for this entry\n",
+               (yyvaluep->menu)->file->name, (yyvaluep->menu)->lineno);
+       if (current_menu == (yyvaluep->menu))
+               menu_end_menu();
+};
+
+       break;
+      case 69: /* "menu_entry" */
+
+       {
+       fprintf(stderr, "%s:%d: missing end statement for this entry\n",
+               (yyvaluep->menu)->file->name, (yyvaluep->menu)->lineno);
+       if (current_menu == (yyvaluep->menu))
+               menu_end_menu();
+};
+
+       break;
+
+      default:
+       break;
+    }
+}
+
+
+/* Prevent warnings from -Wmissing-prototypes.  */
+#ifdef YYPARSE_PARAM
+#if defined __STDC__ || defined __cplusplus
+int yyparse (void *YYPARSE_PARAM);
+#else
+int yyparse ();
+#endif
+#else /* ! YYPARSE_PARAM */
+#if defined __STDC__ || defined __cplusplus
+int yyparse (void);
+#else
+int yyparse ();
+#endif
+#endif /* ! YYPARSE_PARAM */
+
+
+/* The lookahead symbol.  */
+int yychar;
+
+/* The semantic value of the lookahead symbol.  */
+YYSTYPE yylval;
+
+/* Number of syntax errors so far.  */
+int yynerrs;
+
+
+/*----------.
+| yyparse.  |
+`----------*/
+
+#ifdef YYPARSE_PARAM
+#if (defined __STDC__ || defined __C99__FUNC__ \
+     || defined __cplusplus || defined _MSC_VER)
+int
+yyparse (void *YYPARSE_PARAM)
+#else
+int
+yyparse (YYPARSE_PARAM)
+    void *YYPARSE_PARAM;
+#endif
+#else /* ! YYPARSE_PARAM */
+#if (defined __STDC__ || defined __C99__FUNC__ \
+     || defined __cplusplus || defined _MSC_VER)
+int
+yyparse (void)
+#else
+int
+yyparse ()
+
+#endif
+#endif
+{
+    int yystate;
+    /* Number of tokens to shift before error messages enabled.  */
+    int yyerrstatus;
+
+    /* The stacks and their tools:
+       `yyss': related to states.
+       `yyvs': related to semantic values.
+
+       Refer to the stacks through separate pointers, to allow yyoverflow
+       to reallocate them elsewhere.  */
+
+    /* The state stack.  */
+    yytype_int16 yyssa[YYINITDEPTH];
+    yytype_int16 *yyss;
+    yytype_int16 *yyssp;
+
+    /* The semantic value stack.  */
+    YYSTYPE yyvsa[YYINITDEPTH];
+    YYSTYPE *yyvs;
+    YYSTYPE *yyvsp;
+
+    YYSIZE_T yystacksize;
+
+  int yyn;
+  int yyresult;
+  /* Lookahead token as an internal (translated) token number.  */
+  int yytoken;
+  /* The variables used to return semantic value and location from the
+     action routines.  */
+  YYSTYPE yyval;
+
+#if YYERROR_VERBOSE
+  /* Buffer for error messages, and its allocated size.  */
+  char yymsgbuf[128];
+  char *yymsg = yymsgbuf;
+  YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
+#endif
+
+#define YYPOPSTACK(N)   (yyvsp -= (N), yyssp -= (N))
+
+  /* The number of symbols on the RHS of the reduced rule.
+     Keep to zero when no symbol should be popped.  */
+  int yylen = 0;
+
+  yytoken = 0;
+  yyss = yyssa;
+  yyvs = yyvsa;
+  yystacksize = YYINITDEPTH;
+
+  YYDPRINTF ((stderr, "Starting parse\n"));
+
+  yystate = 0;
+  yyerrstatus = 0;
+  yynerrs = 0;
+  yychar = YYEMPTY; /* Cause a token to be read.  */
+
+  /* Initialize stack pointers.
+     Waste one element of value and location stack
+     so that they stay on the same level as the state stack.
+     The wasted elements are never initialized.  */
+  yyssp = yyss;
+  yyvsp = yyvs;
+
+  goto yysetstate;
+
+/*------------------------------------------------------------.
+| yynewstate -- Push a new state, which is found in yystate.  |
+`------------------------------------------------------------*/
+ yynewstate:
+  /* In all cases, when you get here, the value and location stacks
+     have just been pushed.  So pushing a state here evens the stacks.  */
+  yyssp++;
+
+ yysetstate:
+  *yyssp = yystate;
+
+  if (yyss + yystacksize - 1 <= yyssp)
+    {
+      /* Get the current used size of the three stacks, in elements.  */
+      YYSIZE_T yysize = yyssp - yyss + 1;
+
+#ifdef yyoverflow
+      {
+       /* Give user a chance to reallocate the stack.  Use copies of
+          these so that the &'s don't force the real ones into
+          memory.  */
+       YYSTYPE *yyvs1 = yyvs;
+       yytype_int16 *yyss1 = yyss;
+
+       /* Each stack pointer address is followed by the size of the
+          data in use in that stack, in bytes.  This used to be a
+          conditional around just the two extra args, but that might
+          be undefined if yyoverflow is a macro.  */
+       yyoverflow (YY_("memory exhausted"),
+                   &yyss1, yysize * sizeof (*yyssp),
+                   &yyvs1, yysize * sizeof (*yyvsp),
+                   &yystacksize);
+
+       yyss = yyss1;
+       yyvs = yyvs1;
+      }
+#else /* no yyoverflow */
+# ifndef YYSTACK_RELOCATE
+      goto yyexhaustedlab;
+# else
+      /* Extend the stack our own way.  */
+      if (YYMAXDEPTH <= yystacksize)
+       goto yyexhaustedlab;
+      yystacksize *= 2;
+      if (YYMAXDEPTH < yystacksize)
+       yystacksize = YYMAXDEPTH;
+
+      {
+       yytype_int16 *yyss1 = yyss;
+       union yyalloc *yyptr =
+         (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
+       if (! yyptr)
+         goto yyexhaustedlab;
+       YYSTACK_RELOCATE (yyss_alloc, yyss);
+       YYSTACK_RELOCATE (yyvs_alloc, yyvs);
+#  undef YYSTACK_RELOCATE
+       if (yyss1 != yyssa)
+         YYSTACK_FREE (yyss1);
+      }
+# endif
+#endif /* no yyoverflow */
+
+      yyssp = yyss + yysize - 1;
+      yyvsp = yyvs + yysize - 1;
+
+      YYDPRINTF ((stderr, "Stack size increased to %lu\n",
+                 (unsigned long int) yystacksize));
+
+      if (yyss + yystacksize - 1 <= yyssp)
+       YYABORT;
+    }
+
+  YYDPRINTF ((stderr, "Entering state %d\n", yystate));
+
+  if (yystate == YYFINAL)
+    YYACCEPT;
+
+  goto yybackup;
+
+/*-----------.
+| yybackup.  |
+`-----------*/
+yybackup:
+
+  /* Do appropriate processing given the current state.  Read a
+     lookahead token if we need one and don't already have one.  */
+
+  /* First try to decide what to do without reference to lookahead token.  */
+  yyn = yypact[yystate];
+  if (yypact_value_is_default (yyn))
+    goto yydefault;
+
+  /* Not known => get a lookahead token if don't already have one.  */
+
+  /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol.  */
+  if (yychar == YYEMPTY)
+    {
+      YYDPRINTF ((stderr, "Reading a token: "));
+      yychar = YYLEX;
+    }
+
+  if (yychar <= YYEOF)
+    {
+      yychar = yytoken = YYEOF;
+      YYDPRINTF ((stderr, "Now at end of input.\n"));
+    }
+  else
+    {
+      yytoken = YYTRANSLATE (yychar);
+      YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
+    }
+
+  /* If the proper action on seeing token YYTOKEN is to reduce or to
+     detect an error, take that action.  */
+  yyn += yytoken;
+  if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)
+    goto yydefault;
+  yyn = yytable[yyn];
+  if (yyn <= 0)
+    {
+      if (yytable_value_is_error (yyn))
+        goto yyerrlab;
+      yyn = -yyn;
+      goto yyreduce;
+    }
+
+  /* Count tokens shifted since error; after three, turn off error
+     status.  */
+  if (yyerrstatus)
+    yyerrstatus--;
+
+  /* Shift the lookahead token.  */
+  YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
+
+  /* Discard the shifted token.  */
+  yychar = YYEMPTY;
+
+  yystate = yyn;
+  *++yyvsp = yylval;
+
+  goto yynewstate;
+
+
+/*-----------------------------------------------------------.
+| yydefault -- do the default action for the current state.  |
+`-----------------------------------------------------------*/
+yydefault:
+  yyn = yydefact[yystate];
+  if (yyn == 0)
+    goto yyerrlab;
+  goto yyreduce;
+
+
+/*-----------------------------.
+| yyreduce -- Do a reduction.  |
+`-----------------------------*/
+yyreduce:
+  /* yyn is the number of a rule to reduce with.  */
+  yylen = yyr2[yyn];
+
+  /* If YYLEN is nonzero, implement the default value of the action:
+     `$$ = $1'.
+
+     Otherwise, the following line sets YYVAL to garbage.
+     This behavior is undocumented and Bison
+     users should not rely upon it.  Assigning to YYVAL
+     unconditionally makes the parser a bit smaller, and it avoids a
+     GCC warning that YYVAL may be used uninitialized.  */
+  yyval = yyvsp[1-yylen];
+
+
+  YY_REDUCE_PRINT (yyn);
+  switch (yyn)
+    {
+        case 10:
+
+    { zconf_error("unexpected end statement"); }
+    break;
+
+  case 11:
+
+    { zconf_error("unknown statement \"%s\"", (yyvsp[(2) - (4)].string)); }
+    break;
+
+  case 12:
+
+    {
+       zconf_error("unexpected option \"%s\"", kconf_id_strings + (yyvsp[(2) - 
(4)].id)->name);
+}
+    break;
+
+  case 13:
+
+    { zconf_error("invalid statement"); }
+    break;
+
+  case 28:
+
+    { zconf_error("unknown option \"%s\"", (yyvsp[(1) - (3)].string)); }
+    break;
+
+  case 29:
+
+    { zconf_error("invalid option"); }
+    break;
+
+  case 30:
+
+    {
+       struct symbol *sym = sym_lookup((yyvsp[(2) - (3)].string), 0);
+       sym->flags |= SYMBOL_OPTIONAL;
+       menu_add_entry(sym);
+       printd(DEBUG_PARSE, "%s:%d:config %s\n", zconf_curname(), 
zconf_lineno(), (yyvsp[(2) - (3)].string));
+}
+    break;
+
+  case 31:
+
+    {
+       menu_end_entry();
+       printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), 
zconf_lineno());
+}
+    break;
+
+  case 32:
+
+    {
+       struct symbol *sym = sym_lookup((yyvsp[(2) - (3)].string), 0);
+       sym->flags |= SYMBOL_OPTIONAL;
+       menu_add_entry(sym);
+       printd(DEBUG_PARSE, "%s:%d:menuconfig %s\n", zconf_curname(), 
zconf_lineno(), (yyvsp[(2) - (3)].string));
+}
+    break;
+
+  case 33:
+
+    {
+       if (current_entry->prompt)
+               current_entry->prompt->type = P_MENU;
+       else
+               zconfprint("warning: menuconfig statement without prompt");
+       menu_end_entry();
+       printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), 
zconf_lineno());
+}
+    break;
+
+  case 41:
+
+    {
+       menu_set_type((yyvsp[(1) - (3)].id)->stype);
+       printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
+               zconf_curname(), zconf_lineno(),
+               (yyvsp[(1) - (3)].id)->stype);
+}
+    break;
+
+  case 42:
+
+    {
+       menu_add_prompt(P_PROMPT, (yyvsp[(2) - (4)].string), (yyvsp[(3) - 
(4)].expr));
+       printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
+}
+    break;
+
+  case 43:
+
+    {
+       menu_add_expr(P_DEFAULT, (yyvsp[(2) - (4)].expr), (yyvsp[(3) - 
(4)].expr));
+       if ((yyvsp[(1) - (4)].id)->stype != S_UNKNOWN)
+               menu_set_type((yyvsp[(1) - (4)].id)->stype);
+       printd(DEBUG_PARSE, "%s:%d:default(%u)\n",
+               zconf_curname(), zconf_lineno(),
+               (yyvsp[(1) - (4)].id)->stype);
+}
+    break;
+
+  case 44:
+
+    {
+       menu_add_symbol(P_SELECT, sym_lookup((yyvsp[(2) - (4)].string), 0), 
(yyvsp[(3) - (4)].expr));
+       printd(DEBUG_PARSE, "%s:%d:select\n", zconf_curname(), zconf_lineno());
+}
+    break;
+
+  case 45:
+
+    {
+       menu_add_expr(P_RANGE, expr_alloc_comp(E_RANGE,(yyvsp[(2) - 
(5)].symbol), (yyvsp[(3) - (5)].symbol)), (yyvsp[(4) - (5)].expr));
+       printd(DEBUG_PARSE, "%s:%d:range\n", zconf_curname(), zconf_lineno());
+}
+    break;
+
+  case 48:
+
+    {
+       const struct kconf_id *id = kconf_id_lookup((yyvsp[(2) - (3)].string), 
strlen((yyvsp[(2) - (3)].string)));
+       if (id && id->flags & TF_OPTION)
+               menu_add_option(id->token, (yyvsp[(3) - (3)].string));
+       else
+               zconfprint("warning: ignoring unknown option %s", (yyvsp[(2) - 
(3)].string));
+       free((yyvsp[(2) - (3)].string));
+}
+    break;
+
+  case 49:
+
+    { (yyval.string) = NULL; }
+    break;
+
+  case 50:
+
+    { (yyval.string) = (yyvsp[(2) - (2)].string); }
+    break;
+
+  case 51:
+
+    {
+       struct symbol *sym = sym_lookup((yyvsp[(2) - (3)].string), 
SYMBOL_CHOICE);
+       sym->flags |= SYMBOL_AUTO;
+       menu_add_entry(sym);
+       menu_add_expr(P_CHOICE, NULL, NULL);
+       printd(DEBUG_PARSE, "%s:%d:choice\n", zconf_curname(), zconf_lineno());
+}
+    break;
+
+  case 52:
+
+    {
+       (yyval.menu) = menu_add_menu();
+}
+    break;
+
+  case 53:
+
+    {
+       if (zconf_endtoken((yyvsp[(1) - (1)].id), T_CHOICE, T_ENDCHOICE)) {
+               menu_end_menu();
+               printd(DEBUG_PARSE, "%s:%d:endchoice\n", zconf_curname(), 
zconf_lineno());
+       }
+}
+    break;
+
+  case 61:
+
+    {
+       menu_add_prompt(P_PROMPT, (yyvsp[(2) - (4)].string), (yyvsp[(3) - 
(4)].expr));
+       printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
+}
+    break;
+
+  case 62:
+
+    {
+       if ((yyvsp[(1) - (3)].id)->stype == S_BOOLEAN || (yyvsp[(1) - 
(3)].id)->stype == S_TRISTATE) {
+               menu_set_type((yyvsp[(1) - (3)].id)->stype);
+               printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
+                       zconf_curname(), zconf_lineno(),
+                       (yyvsp[(1) - (3)].id)->stype);
+       } else
+               YYERROR;
+}
+    break;
+
+  case 63:
+
+    {
+       current_entry->sym->flags |= SYMBOL_OPTIONAL;
+       printd(DEBUG_PARSE, "%s:%d:optional\n", zconf_curname(), 
zconf_lineno());
+}
+    break;
+
+  case 64:
+
+    {
+       if ((yyvsp[(1) - (4)].id)->stype == S_UNKNOWN) {
+               menu_add_symbol(P_DEFAULT, sym_lookup((yyvsp[(2) - 
(4)].string), 0), (yyvsp[(3) - (4)].expr));
+               printd(DEBUG_PARSE, "%s:%d:default\n",
+                       zconf_curname(), zconf_lineno());
+       } else
+               YYERROR;
+}
+    break;
+
+  case 67:
+
+    {
+       printd(DEBUG_PARSE, "%s:%d:if\n", zconf_curname(), zconf_lineno());
+       menu_add_entry(NULL);
+       menu_add_dep((yyvsp[(2) - (3)].expr));
+       (yyval.menu) = menu_add_menu();
+}
+    break;
+
+  case 68:
+
+    {
+       if (zconf_endtoken((yyvsp[(1) - (1)].id), T_IF, T_ENDIF)) {
+               menu_end_menu();
+               printd(DEBUG_PARSE, "%s:%d:endif\n", zconf_curname(), 
zconf_lineno());
+       }
+}
+    break;
+
+  case 74:
+
+    {
+       menu_add_prompt(P_MENU, (yyvsp[(2) - (3)].string), NULL);
+}
+    break;
+
+  case 75:
+
+    {
+       menu_add_entry(NULL);
+       menu_add_prompt(P_MENU, (yyvsp[(2) - (3)].string), NULL);
+       printd(DEBUG_PARSE, "%s:%d:menu\n", zconf_curname(), zconf_lineno());
+}
+    break;
+
+  case 76:
+
+    {
+       (yyval.menu) = menu_add_menu();
+}
+    break;
+
+  case 77:
+
+    {
+       if (zconf_endtoken((yyvsp[(1) - (1)].id), T_MENU, T_ENDMENU)) {
+               menu_end_menu();
+               printd(DEBUG_PARSE, "%s:%d:endmenu\n", zconf_curname(), 
zconf_lineno());
+       }
+}
+    break;
+
+  case 83:
+
+    {
+       printd(DEBUG_PARSE, "%s:%d:source %s\n", zconf_curname(), 
zconf_lineno(), (yyvsp[(2) - (3)].string));
+       zconf_nextfile((yyvsp[(2) - (3)].string));
+}
+    break;
+
+  case 84:
+
+    {
+       menu_add_entry(NULL);
+       menu_add_prompt(P_COMMENT, (yyvsp[(2) - (3)].string), NULL);
+       printd(DEBUG_PARSE, "%s:%d:comment\n", zconf_curname(), zconf_lineno());
+}
+    break;
+
+  case 85:
+
+    {
+       menu_end_entry();
+}
+    break;
+
+  case 86:
+
+    {
+       printd(DEBUG_PARSE, "%s:%d:help\n", zconf_curname(), zconf_lineno());
+       zconf_starthelp();
+}
+    break;
+
+  case 87:
+
+    {
+       current_entry->help = (yyvsp[(2) - (2)].string);
+}
+    break;
+
+  case 92:
+
+    {
+       menu_add_dep((yyvsp[(3) - (4)].expr));
+       printd(DEBUG_PARSE, "%s:%d:depends on\n", zconf_curname(), 
zconf_lineno());
+}
+    break;
+
+  case 96:
+
+    {
+       menu_add_visibility((yyvsp[(2) - (2)].expr));
+}
+    break;
+
+  case 98:
+
+    {
+       menu_add_prompt(P_PROMPT, (yyvsp[(1) - (2)].string), (yyvsp[(2) - 
(2)].expr));
+}
+    break;
+
+  case 101:
+
+    { (yyval.id) = (yyvsp[(1) - (2)].id); }
+    break;
+
+  case 102:
+
+    { (yyval.id) = (yyvsp[(1) - (2)].id); }
+    break;
+
+  case 103:
+
+    { (yyval.id) = (yyvsp[(1) - (2)].id); }
+    break;
+
+  case 106:
+
+    { (yyval.expr) = NULL; }
+    break;
+
+  case 107:
+
+    { (yyval.expr) = (yyvsp[(2) - (2)].expr); }
+    break;
+
+  case 108:
+
+    { (yyval.expr) = expr_alloc_symbol((yyvsp[(1) - (1)].symbol)); }
+    break;
+
+  case 109:
+
+    { (yyval.expr) = expr_alloc_comp(E_LTH, (yyvsp[(1) - (3)].symbol), 
(yyvsp[(3) - (3)].symbol)); }
+    break;
+
+  case 110:
+
+    { (yyval.expr) = expr_alloc_comp(E_LEQ, (yyvsp[(1) - (3)].symbol), 
(yyvsp[(3) - (3)].symbol)); }
+    break;
+
+  case 111:
+
+    { (yyval.expr) = expr_alloc_comp(E_GTH, (yyvsp[(1) - (3)].symbol), 
(yyvsp[(3) - (3)].symbol)); }
+    break;
+
+  case 112:
+
+    { (yyval.expr) = expr_alloc_comp(E_GEQ, (yyvsp[(1) - (3)].symbol), 
(yyvsp[(3) - (3)].symbol)); }
+    break;
+
+  case 113:
+
+    { (yyval.expr) = expr_alloc_comp(E_EQUAL, (yyvsp[(1) - (3)].symbol), 
(yyvsp[(3) - (3)].symbol)); }
+    break;
+
+  case 114:
+
+    { (yyval.expr) = expr_alloc_comp(E_UNEQUAL, (yyvsp[(1) - (3)].symbol), 
(yyvsp[(3) - (3)].symbol)); }
+    break;
+
+  case 115:
+
+    { (yyval.expr) = (yyvsp[(2) - (3)].expr); }
+    break;
+
+  case 116:
+
+    { (yyval.expr) = expr_alloc_one(E_NOT, (yyvsp[(2) - (2)].expr)); }
+    break;
+
+  case 117:
+
+    { (yyval.expr) = expr_alloc_two(E_OR, (yyvsp[(1) - (3)].expr), (yyvsp[(3) 
- (3)].expr)); }
+    break;
+
+  case 118:
+
+    { (yyval.expr) = expr_alloc_two(E_AND, (yyvsp[(1) - (3)].expr), (yyvsp[(3) 
- (3)].expr)); }
+    break;
+
+  case 119:
+
+    { (yyval.symbol) = sym_lookup((yyvsp[(1) - (1)].string), 0); 
free((yyvsp[(1) - (1)].string)); }
+    break;
+
+  case 120:
+
+    { (yyval.symbol) = sym_lookup((yyvsp[(1) - (1)].string), SYMBOL_CONST); 
free((yyvsp[(1) - (1)].string)); }
+    break;
+
+  case 121:
+
+    { (yyval.string) = NULL; }
+    break;
+
+
+
+      default: break;
+    }
+  /* User semantic actions sometimes alter yychar, and that requires
+     that yytoken be updated with the new translation.  We take the
+     approach of translating immediately before every use of yytoken.
+     One alternative is translating here after every semantic action,
+     but that translation would be missed if the semantic action invokes
+     YYABORT, YYACCEPT, or YYERROR immediately after altering yychar or
+     if it invokes YYBACKUP.  In the case of YYABORT or YYACCEPT, an
+     incorrect destructor might then be invoked immediately.  In the
+     case of YYERROR or YYBACKUP, subsequent parser actions might lead
+     to an incorrect destructor call or verbose syntax error message
+     before the lookahead is translated.  */
+  YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
+
+  YYPOPSTACK (yylen);
+  yylen = 0;
+  YY_STACK_PRINT (yyss, yyssp);
+
+  *++yyvsp = yyval;
+
+  /* Now `shift' the result of the reduction.  Determine what state
+     that goes to, based on the state we popped back to and the rule
+     number reduced by.  */
+
+  yyn = yyr1[yyn];
+
+  yystate = yypgoto[yyn - YYNTOKENS] + *yyssp;
+  if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp)
+    yystate = yytable[yystate];
+  else
+    yystate = yydefgoto[yyn - YYNTOKENS];
+
+  goto yynewstate;
+
+
+/*------------------------------------.
+| yyerrlab -- here on detecting error |
+`------------------------------------*/
+yyerrlab:
+  /* Make sure we have latest lookahead translation.  See comments at
+     user semantic actions for why this is necessary.  */
+  yytoken = yychar == YYEMPTY ? YYEMPTY : YYTRANSLATE (yychar);
+
+  /* If not already recovering from an error, report this error.  */
+  if (!yyerrstatus)
+    {
+      ++yynerrs;
+#if ! YYERROR_VERBOSE
+      yyerror (YY_("syntax error"));
+#else
+# define YYSYNTAX_ERROR yysyntax_error (&yymsg_alloc, &yymsg, \
+                                        yyssp, yytoken)
+      {
+        char const *yymsgp = YY_("syntax error");
+        int yysyntax_error_status;
+        yysyntax_error_status = YYSYNTAX_ERROR;
+        if (yysyntax_error_status == 0)
+          yymsgp = yymsg;
+        else if (yysyntax_error_status == 1)
+          {
+            if (yymsg != yymsgbuf)
+              YYSTACK_FREE (yymsg);
+            yymsg = (char *) YYSTACK_ALLOC (yymsg_alloc);
+            if (!yymsg)
+              {
+                yymsg = yymsgbuf;
+                yymsg_alloc = sizeof yymsgbuf;
+                yysyntax_error_status = 2;
+              }
+            else
+              {
+                yysyntax_error_status = YYSYNTAX_ERROR;
+                yymsgp = yymsg;
+              }
+          }
+        yyerror (yymsgp);
+        if (yysyntax_error_status == 2)
+          goto yyexhaustedlab;
+      }
+# undef YYSYNTAX_ERROR
+#endif
+    }
+
+
+
+  if (yyerrstatus == 3)
+    {
+      /* If just tried and failed to reuse lookahead token after an
+        error, discard it.  */
+
+      if (yychar <= YYEOF)
+       {
+         /* Return failure if at end of input.  */
+         if (yychar == YYEOF)
+           YYABORT;
+       }
+      else
+       {
+         yydestruct ("Error: discarding",
+                     yytoken, &yylval);
+         yychar = YYEMPTY;
+       }
+    }
+
+  /* Else will try to reuse lookahead token after shifting the error
+     token.  */
+  goto yyerrlab1;
+
+
+/*---------------------------------------------------.
+| yyerrorlab -- error raised explicitly by YYERROR.  |
+`---------------------------------------------------*/
+yyerrorlab:
+
+  /* Pacify compilers like GCC when the user code never invokes
+     YYERROR and the label yyerrorlab therefore never appears in user
+     code.  */
+  if (/*CONSTCOND*/ 0)
+     goto yyerrorlab;
+
+  /* Do not reclaim the symbols of the rule which action triggered
+     this YYERROR.  */
+  YYPOPSTACK (yylen);
+  yylen = 0;
+  YY_STACK_PRINT (yyss, yyssp);
+  yystate = *yyssp;
+  goto yyerrlab1;
+
+
+/*-------------------------------------------------------------.
+| yyerrlab1 -- common code for both syntax error and YYERROR.  |
+`-------------------------------------------------------------*/
+yyerrlab1:
+  yyerrstatus = 3;     /* Each real token shifted decrements this.  */
+
+  for (;;)
+    {
+      yyn = yypact[yystate];
+      if (!yypact_value_is_default (yyn))
+       {
+         yyn += YYTERROR;
+         if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
+           {
+             yyn = yytable[yyn];
+             if (0 < yyn)
+               break;
+           }
+       }
+
+      /* Pop the current state because it cannot handle the error token.  */
+      if (yyssp == yyss)
+       YYABORT;
+
+
+      yydestruct ("Error: popping",
+                 yystos[yystate], yyvsp);
+      YYPOPSTACK (1);
+      yystate = *yyssp;
+      YY_STACK_PRINT (yyss, yyssp);
+    }
+
+  *++yyvsp = yylval;
+
+
+  /* Shift the error token.  */
+  YY_SYMBOL_PRINT ("Shifting", yystos[yyn], yyvsp, yylsp);
+
+  yystate = yyn;
+  goto yynewstate;
+
+
+/*-------------------------------------.
+| yyacceptlab -- YYACCEPT comes here.  |
+`-------------------------------------*/
+yyacceptlab:
+  yyresult = 0;
+  goto yyreturn;
+
+/*-----------------------------------.
+| yyabortlab -- YYABORT comes here.  |
+`-----------------------------------*/
+yyabortlab:
+  yyresult = 1;
+  goto yyreturn;
+
+#if !defined yyoverflow || YYERROR_VERBOSE
+/*-------------------------------------------------.
+| yyexhaustedlab -- memory exhaustion comes here.  |
+`-------------------------------------------------*/
+yyexhaustedlab:
+  yyerror (YY_("memory exhausted"));
+  yyresult = 2;
+  /* Fall through.  */
+#endif
+
+yyreturn:
+  if (yychar != YYEMPTY)
+    {
+      /* Make sure we have latest lookahead translation.  See comments at
+         user semantic actions for why this is necessary.  */
+      yytoken = YYTRANSLATE (yychar);
+      yydestruct ("Cleanup: discarding lookahead",
+                  yytoken, &yylval);
+    }
+  /* Do not reclaim the symbols of the rule which action triggered
+     this YYABORT or YYACCEPT.  */
+  YYPOPSTACK (yylen);
+  YY_STACK_PRINT (yyss, yyssp);
+  while (yyssp != yyss)
+    {
+      yydestruct ("Cleanup: popping",
+                 yystos[*yyssp], yyvsp);
+      YYPOPSTACK (1);
+    }
+#ifndef yyoverflow
+  if (yyss != yyssa)
+    YYSTACK_FREE (yyss);
+#endif
+#if YYERROR_VERBOSE
+  if (yymsg != yymsgbuf)
+    YYSTACK_FREE (yymsg);
+#endif
+  /* Make sure YYID is used.  */
+  return YYID (yyresult);
+}
+
+
+
+
+
+void conf_parse(const char *name)
+{
+       struct symbol *sym;
+       int i;
+
+       zconf_initscan(name);
+
+       sym_init();
+       _menu_init();
+       rootmenu.prompt = menu_add_prompt(P_MENU, "Linux Kernel Configuration", 
NULL);
+
+       if (getenv("ZCONF_DEBUG"))
+               zconfdebug = 1;
+       zconfparse();
+       if (zconfnerrs)
+               exit(1);
+       if (!modules_sym)
+               modules_sym = sym_find( "n" );
+
+       rootmenu.prompt->text = _(rootmenu.prompt->text);
+       rootmenu.prompt->text = sym_expand_string_value(rootmenu.prompt->text);
+
+       menu_finalize(&rootmenu);
+       for_all_symbols(i, sym) {
+               if (sym_check_deps(sym))
+                       zconfnerrs++;
+       }
+       if (zconfnerrs)
+               exit(1);
+       sym_set_change_count(1);
+}
+
+static const char *zconf_tokenname(int token)
+{
+       switch (token) {
+       case T_MENU:            return "menu";
+       case T_ENDMENU:         return "endmenu";
+       case T_CHOICE:          return "choice";
+       case T_ENDCHOICE:       return "endchoice";
+       case T_IF:              return "if";
+       case T_ENDIF:           return "endif";
+       case T_DEPENDS:         return "depends";
+       case T_VISIBLE:         return "visible";
+       }
+       return "<token>";
+}
+
+static bool zconf_endtoken(const struct kconf_id *id, int starttoken, int 
endtoken)
+{
+       if (id->token != endtoken) {
+               zconf_error("unexpected '%s' within %s block",
+                       kconf_id_strings + id->name, 
zconf_tokenname(starttoken));
+               zconfnerrs++;
+               return false;
+       }
+       if (current_menu->file != current_file) {
+               zconf_error("'%s' in different file than '%s'",
+                       kconf_id_strings + id->name, 
zconf_tokenname(starttoken));
+               fprintf(stderr, "%s:%d: location of the '%s'\n",
+                       current_menu->file->name, current_menu->lineno,
+                       zconf_tokenname(starttoken));
+               zconfnerrs++;
+               return false;
+       }
+       return true;
+}
+
+static void zconfprint(const char *err, ...)
+{
+       va_list ap;
+
+       fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
+       va_start(ap, err);
+       vfprintf(stderr, err, ap);
+       va_end(ap);
+       fprintf(stderr, "\n");
+}
+
+static void zconf_error(const char *err, ...)
+{
+       va_list ap;
+
+       zconfnerrs++;
+       fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
+       va_start(ap, err);
+       vfprintf(stderr, err, ap);
+       va_end(ap);
+       fprintf(stderr, "\n");
+}
+
+static void zconferror(const char *err)
+{
+       fprintf(stderr, "%s:%d: %s\n", zconf_curname(), zconf_lineno() + 1, 
err);
+}
+
+static void print_quoted_string(FILE *out, const char *str)
+{
+       const char *p;
+       int len;
+
+       putc('"', out);
+       while ((p = strchr(str, '"'))) {
+               len = p - str;
+               if (len)
+                       fprintf(out, "%.*s", len, str);
+               fputs("\\\"", out);
+               str = p + 1;
+       }
+       fputs(str, out);
+       putc('"', out);
+}
+
+static void print_symbol(FILE *out, struct menu *menu)
+{
+       struct symbol *sym = menu->sym;
+       struct property *prop;
+
+       if (sym_is_choice(sym))
+               fprintf(out, "\nchoice\n");
+       else
+               fprintf(out, "\nconfig %s\n", sym->name);
+       switch (sym->type) {
+       case S_BOOLEAN:
+               fputs("  boolean\n", out);
+               break;
+       case S_TRISTATE:
+               fputs("  tristate\n", out);
+               break;
+       case S_STRING:
+               fputs("  string\n", out);
+               break;
+       case S_INT:
+               fputs("  integer\n", out);
+               break;
+       case S_HEX:
+               fputs("  hex\n", out);
+               break;
+       default:
+               fputs("  ???\n", out);
+               break;
+       }
+       for (prop = sym->prop; prop; prop = prop->next) {
+               if (prop->menu != menu)
+                       continue;
+               switch (prop->type) {
+               case P_PROMPT:
+                       fputs("  prompt ", out);
+                       print_quoted_string(out, prop->text);
+                       if (!expr_is_yes(prop->visible.expr)) {
+                               fputs(" if ", out);
+                               expr_fprint(prop->visible.expr, out);
+                       }
+                       fputc('\n', out);
+                       break;
+               case P_DEFAULT:
+                       fputs( "  default ", out);
+                       expr_fprint(prop->expr, out);
+                       if (!expr_is_yes(prop->visible.expr)) {
+                               fputs(" if ", out);
+                               expr_fprint(prop->visible.expr, out);
+                       }
+                       fputc('\n', out);
+                       break;
+               case P_CHOICE:
+                       fputs("  #choice value\n", out);
+                       break;
+               case P_SELECT:
+                       fputs( "  select ", out);
+                       expr_fprint(prop->expr, out);
+                       fputc('\n', out);
+                       break;
+               case P_RANGE:
+                       fputs( "  range ", out);
+                       expr_fprint(prop->expr, out);
+                       fputc('\n', out);
+                       break;
+               case P_MENU:
+                       fputs( "  menu ", out);
+                       print_quoted_string(out, prop->text);
+                       fputc('\n', out);
+                       break;
+               default:
+                       fprintf(out, "  unknown prop %d!\n", prop->type);
+                       break;
+               }
+       }
+       if (menu->help) {
+               int len = strlen(menu->help);
+               while (menu->help[--len] == '\n')
+                       menu->help[len] = 0;
+               fprintf(out, "  help\n%s\n", menu->help);
+       }
+}
+
+void zconfdump(FILE *out)
+{
+       struct property *prop;
+       struct symbol *sym;
+       struct menu *menu;
+
+       menu = rootmenu.list;
+       while (menu) {
+               if ((sym = menu->sym))
+                       print_symbol(out, menu);
+               else if ((prop = menu->prompt)) {
+                       switch (prop->type) {
+                       case P_COMMENT:
+                               fputs("\ncomment ", out);
+                               print_quoted_string(out, prop->text);
+                               fputs("\n", out);
+                               break;
+                       case P_MENU:
+                               fputs("\nmenu ", out);
+                               print_quoted_string(out, prop->text);
+                               fputs("\n", out);
+                               break;
+                       default:
+                               ;
+                       }
+                       if (!expr_is_yes(prop->visible.expr)) {
+                               fputs("  depends ", out);
+                               expr_fprint(prop->visible.expr, out);
+                               fputc('\n', out);
+                       }
+               }
+
+               if (menu->list)
+                       menu = menu->list;
+               else if (menu->next)
+                       menu = menu->next;
+               else while ((menu = menu->parent)) {
+                       if (menu->prompt && menu->prompt->type == P_MENU)
+                               fputs("\nendmenu\n", out);
+                       if (menu->next) {
+                               menu = menu->next;
+                               break;
+                       }
+               }
+       }
+}
+
+#include "zconf.lex.c"
+#include "util.c"
+#include "confdata.c"
+#include "expr.c"
+#include "symbol.c"
+#include "menu.c"
+
diff --git a/xen/tools/kconfig/zconf.y b/xen/tools/kconfig/zconf.y
new file mode 100644
index 0000000..71bf8bf
--- /dev/null
+++ b/xen/tools/kconfig/zconf.y
@@ -0,0 +1,742 @@
+%{
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@xxxxxxxxxxxxxx>
+ * Released under the terms of the GNU GPL v2.0.
+ */
+
+#include <ctype.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+
+#include "lkc.h"
+
+#define printd(mask, fmt...) if (cdebug & (mask)) printf(fmt)
+
+#define PRINTD         0x0001
+#define DEBUG_PARSE    0x0002
+
+int cdebug = PRINTD;
+
+extern int zconflex(void);
+static void zconfprint(const char *err, ...);
+static void zconf_error(const char *err, ...);
+static void zconferror(const char *err);
+static bool zconf_endtoken(const struct kconf_id *id, int starttoken, int 
endtoken);
+
+struct symbol *symbol_hash[SYMBOL_HASHSIZE];
+
+static struct menu *current_menu, *current_entry;
+
+%}
+%expect 30
+
+%union
+{
+       char *string;
+       struct file *file;
+       struct symbol *symbol;
+       struct expr *expr;
+       struct menu *menu;
+       const struct kconf_id *id;
+}
+
+%token <id>T_MAINMENU
+%token <id>T_MENU
+%token <id>T_ENDMENU
+%token <id>T_SOURCE
+%token <id>T_CHOICE
+%token <id>T_ENDCHOICE
+%token <id>T_COMMENT
+%token <id>T_CONFIG
+%token <id>T_MENUCONFIG
+%token <id>T_HELP
+%token <string> T_HELPTEXT
+%token <id>T_IF
+%token <id>T_ENDIF
+%token <id>T_DEPENDS
+%token <id>T_OPTIONAL
+%token <id>T_PROMPT
+%token <id>T_TYPE
+%token <id>T_DEFAULT
+%token <id>T_SELECT
+%token <id>T_RANGE
+%token <id>T_VISIBLE
+%token <id>T_OPTION
+%token <id>T_ON
+%token <string> T_WORD
+%token <string> T_WORD_QUOTE
+%token T_UNEQUAL
+%token T_LESS
+%token T_LESS_EQUAL
+%token T_GREATER
+%token T_GREATER_EQUAL
+%token T_CLOSE_PAREN
+%token T_OPEN_PAREN
+%token T_EOL
+
+%left T_OR
+%left T_AND
+%left T_EQUAL T_UNEQUAL
+%left T_LESS T_LESS_EQUAL T_GREATER T_GREATER_EQUAL
+%nonassoc T_NOT
+
+%type <string> prompt
+%type <symbol> symbol
+%type <expr> expr
+%type <expr> if_expr
+%type <id> end
+%type <id> option_name
+%type <menu> if_entry menu_entry choice_entry
+%type <string> symbol_option_arg word_opt
+
+%destructor {
+       fprintf(stderr, "%s:%d: missing end statement for this entry\n",
+               $$->file->name, $$->lineno);
+       if (current_menu == $$)
+               menu_end_menu();
+} if_entry menu_entry choice_entry
+
+%{
+/* Include zconf.hash.c here so it can see the token constants. */
+#include "zconf.hash.c"
+%}
+
+%%
+input: nl start | start;
+
+start: mainmenu_stmt stmt_list | stmt_list;
+
+stmt_list:
+         /* empty */
+       | stmt_list common_stmt
+       | stmt_list choice_stmt
+       | stmt_list menu_stmt
+       | stmt_list end                 { zconf_error("unexpected end 
statement"); }
+       | stmt_list T_WORD error T_EOL  { zconf_error("unknown statement 
\"%s\"", $2); }
+       | stmt_list option_name error T_EOL
+{
+       zconf_error("unexpected option \"%s\"", kconf_id_strings + $2->name);
+}
+       | stmt_list error T_EOL         { zconf_error("invalid statement"); }
+;
+
+option_name:
+       T_DEPENDS | T_PROMPT | T_TYPE | T_SELECT | T_OPTIONAL | T_RANGE | 
T_DEFAULT | T_VISIBLE
+;
+
+common_stmt:
+         T_EOL
+       | if_stmt
+       | comment_stmt
+       | config_stmt
+       | menuconfig_stmt
+       | source_stmt
+;
+
+option_error:
+         T_WORD error T_EOL            { zconf_error("unknown option \"%s\"", 
$1); }
+       | error T_EOL                   { zconf_error("invalid option"); }
+;
+
+
+/* config/menuconfig entry */
+
+config_entry_start: T_CONFIG T_WORD T_EOL
+{
+       struct symbol *sym = sym_lookup($2, 0);
+       sym->flags |= SYMBOL_OPTIONAL;
+       menu_add_entry(sym);
+       printd(DEBUG_PARSE, "%s:%d:config %s\n", zconf_curname(), 
zconf_lineno(), $2);
+};
+
+config_stmt: config_entry_start config_option_list
+{
+       menu_end_entry();
+       printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), 
zconf_lineno());
+};
+
+menuconfig_entry_start: T_MENUCONFIG T_WORD T_EOL
+{
+       struct symbol *sym = sym_lookup($2, 0);
+       sym->flags |= SYMBOL_OPTIONAL;
+       menu_add_entry(sym);
+       printd(DEBUG_PARSE, "%s:%d:menuconfig %s\n", zconf_curname(), 
zconf_lineno(), $2);
+};
+
+menuconfig_stmt: menuconfig_entry_start config_option_list
+{
+       if (current_entry->prompt)
+               current_entry->prompt->type = P_MENU;
+       else
+               zconfprint("warning: menuconfig statement without prompt");
+       menu_end_entry();
+       printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), 
zconf_lineno());
+};
+
+config_option_list:
+         /* empty */
+       | config_option_list config_option
+       | config_option_list symbol_option
+       | config_option_list depends
+       | config_option_list help
+       | config_option_list option_error
+       | config_option_list T_EOL
+;
+
+config_option: T_TYPE prompt_stmt_opt T_EOL
+{
+       menu_set_type($1->stype);
+       printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
+               zconf_curname(), zconf_lineno(),
+               $1->stype);
+};
+
+config_option: T_PROMPT prompt if_expr T_EOL
+{
+       menu_add_prompt(P_PROMPT, $2, $3);
+       printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
+};
+
+config_option: T_DEFAULT expr if_expr T_EOL
+{
+       menu_add_expr(P_DEFAULT, $2, $3);
+       if ($1->stype != S_UNKNOWN)
+               menu_set_type($1->stype);
+       printd(DEBUG_PARSE, "%s:%d:default(%u)\n",
+               zconf_curname(), zconf_lineno(),
+               $1->stype);
+};
+
+config_option: T_SELECT T_WORD if_expr T_EOL
+{
+       menu_add_symbol(P_SELECT, sym_lookup($2, 0), $3);
+       printd(DEBUG_PARSE, "%s:%d:select\n", zconf_curname(), zconf_lineno());
+};
+
+config_option: T_RANGE symbol symbol if_expr T_EOL
+{
+       menu_add_expr(P_RANGE, expr_alloc_comp(E_RANGE,$2, $3), $4);
+       printd(DEBUG_PARSE, "%s:%d:range\n", zconf_curname(), zconf_lineno());
+};
+
+symbol_option: T_OPTION symbol_option_list T_EOL
+;
+
+symbol_option_list:
+         /* empty */
+       | symbol_option_list T_WORD symbol_option_arg
+{
+       const struct kconf_id *id = kconf_id_lookup($2, strlen($2));
+       if (id && id->flags & TF_OPTION)
+               menu_add_option(id->token, $3);
+       else
+               zconfprint("warning: ignoring unknown option %s", $2);
+       free($2);
+};
+
+symbol_option_arg:
+         /* empty */           { $$ = NULL; }
+       | T_EQUAL prompt        { $$ = $2; }
+;
+
+/* choice entry */
+
+choice: T_CHOICE word_opt T_EOL
+{
+       struct symbol *sym = sym_lookup($2, SYMBOL_CHOICE);
+       sym->flags |= SYMBOL_AUTO;
+       menu_add_entry(sym);
+       menu_add_expr(P_CHOICE, NULL, NULL);
+       printd(DEBUG_PARSE, "%s:%d:choice\n", zconf_curname(), zconf_lineno());
+};
+
+choice_entry: choice choice_option_list
+{
+       $$ = menu_add_menu();
+};
+
+choice_end: end
+{
+       if (zconf_endtoken($1, T_CHOICE, T_ENDCHOICE)) {
+               menu_end_menu();
+               printd(DEBUG_PARSE, "%s:%d:endchoice\n", zconf_curname(), 
zconf_lineno());
+       }
+};
+
+choice_stmt: choice_entry choice_block choice_end
+;
+
+choice_option_list:
+         /* empty */
+       | choice_option_list choice_option
+       | choice_option_list depends
+       | choice_option_list help
+       | choice_option_list T_EOL
+       | choice_option_list option_error
+;
+
+choice_option: T_PROMPT prompt if_expr T_EOL
+{
+       menu_add_prompt(P_PROMPT, $2, $3);
+       printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
+};
+
+choice_option: T_TYPE prompt_stmt_opt T_EOL
+{
+       if ($1->stype == S_BOOLEAN || $1->stype == S_TRISTATE) {
+               menu_set_type($1->stype);
+               printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
+                       zconf_curname(), zconf_lineno(),
+                       $1->stype);
+       } else
+               YYERROR;
+};
+
+choice_option: T_OPTIONAL T_EOL
+{
+       current_entry->sym->flags |= SYMBOL_OPTIONAL;
+       printd(DEBUG_PARSE, "%s:%d:optional\n", zconf_curname(), 
zconf_lineno());
+};
+
+choice_option: T_DEFAULT T_WORD if_expr T_EOL
+{
+       if ($1->stype == S_UNKNOWN) {
+               menu_add_symbol(P_DEFAULT, sym_lookup($2, 0), $3);
+               printd(DEBUG_PARSE, "%s:%d:default\n",
+                       zconf_curname(), zconf_lineno());
+       } else
+               YYERROR;
+};
+
+choice_block:
+         /* empty */
+       | choice_block common_stmt
+;
+
+/* if entry */
+
+if_entry: T_IF expr nl
+{
+       printd(DEBUG_PARSE, "%s:%d:if\n", zconf_curname(), zconf_lineno());
+       menu_add_entry(NULL);
+       menu_add_dep($2);
+       $$ = menu_add_menu();
+};
+
+if_end: end
+{
+       if (zconf_endtoken($1, T_IF, T_ENDIF)) {
+               menu_end_menu();
+               printd(DEBUG_PARSE, "%s:%d:endif\n", zconf_curname(), 
zconf_lineno());
+       }
+};
+
+if_stmt: if_entry if_block if_end
+;
+
+if_block:
+         /* empty */
+       | if_block common_stmt
+       | if_block menu_stmt
+       | if_block choice_stmt
+;
+
+/* mainmenu entry */
+
+mainmenu_stmt: T_MAINMENU prompt nl
+{
+       menu_add_prompt(P_MENU, $2, NULL);
+};
+
+/* menu entry */
+
+menu: T_MENU prompt T_EOL
+{
+       menu_add_entry(NULL);
+       menu_add_prompt(P_MENU, $2, NULL);
+       printd(DEBUG_PARSE, "%s:%d:menu\n", zconf_curname(), zconf_lineno());
+};
+
+menu_entry: menu visibility_list depends_list
+{
+       $$ = menu_add_menu();
+};
+
+menu_end: end
+{
+       if (zconf_endtoken($1, T_MENU, T_ENDMENU)) {
+               menu_end_menu();
+               printd(DEBUG_PARSE, "%s:%d:endmenu\n", zconf_curname(), 
zconf_lineno());
+       }
+};
+
+menu_stmt: menu_entry menu_block menu_end
+;
+
+menu_block:
+         /* empty */
+       | menu_block common_stmt
+       | menu_block menu_stmt
+       | menu_block choice_stmt
+;
+
+source_stmt: T_SOURCE prompt T_EOL
+{
+       printd(DEBUG_PARSE, "%s:%d:source %s\n", zconf_curname(), 
zconf_lineno(), $2);
+       zconf_nextfile($2);
+};
+
+/* comment entry */
+
+comment: T_COMMENT prompt T_EOL
+{
+       menu_add_entry(NULL);
+       menu_add_prompt(P_COMMENT, $2, NULL);
+       printd(DEBUG_PARSE, "%s:%d:comment\n", zconf_curname(), zconf_lineno());
+};
+
+comment_stmt: comment depends_list
+{
+       menu_end_entry();
+};
+
+/* help option */
+
+help_start: T_HELP T_EOL
+{
+       printd(DEBUG_PARSE, "%s:%d:help\n", zconf_curname(), zconf_lineno());
+       zconf_starthelp();
+};
+
+help: help_start T_HELPTEXT
+{
+       current_entry->help = $2;
+};
+
+/* depends option */
+
+depends_list:
+         /* empty */
+       | depends_list depends
+       | depends_list T_EOL
+       | depends_list option_error
+;
+
+depends: T_DEPENDS T_ON expr T_EOL
+{
+       menu_add_dep($3);
+       printd(DEBUG_PARSE, "%s:%d:depends on\n", zconf_curname(), 
zconf_lineno());
+};
+
+/* visibility option */
+
+visibility_list:
+         /* empty */
+       | visibility_list visible
+       | visibility_list T_EOL
+;
+
+visible: T_VISIBLE if_expr
+{
+       menu_add_visibility($2);
+};
+
+/* prompt statement */
+
+prompt_stmt_opt:
+         /* empty */
+       | prompt if_expr
+{
+       menu_add_prompt(P_PROMPT, $1, $2);
+};
+
+prompt:          T_WORD
+       | T_WORD_QUOTE
+;
+
+end:     T_ENDMENU T_EOL       { $$ = $1; }
+       | T_ENDCHOICE T_EOL     { $$ = $1; }
+       | T_ENDIF T_EOL         { $$ = $1; }
+;
+
+nl:
+         T_EOL
+       | nl T_EOL
+;
+
+if_expr:  /* empty */                  { $$ = NULL; }
+       | T_IF expr                     { $$ = $2; }
+;
+
+expr:    symbol                                { $$ = expr_alloc_symbol($1); }
+       | symbol T_LESS symbol                  { $$ = expr_alloc_comp(E_LTH, 
$1, $3); }
+       | symbol T_LESS_EQUAL symbol            { $$ = expr_alloc_comp(E_LEQ, 
$1, $3); }
+       | symbol T_GREATER symbol               { $$ = expr_alloc_comp(E_GTH, 
$1, $3); }
+       | symbol T_GREATER_EQUAL symbol         { $$ = expr_alloc_comp(E_GEQ, 
$1, $3); }
+       | symbol T_EQUAL symbol                 { $$ = expr_alloc_comp(E_EQUAL, 
$1, $3); }
+       | symbol T_UNEQUAL symbol               { $$ = 
expr_alloc_comp(E_UNEQUAL, $1, $3); }
+       | T_OPEN_PAREN expr T_CLOSE_PAREN       { $$ = $2; }
+       | T_NOT expr                            { $$ = expr_alloc_one(E_NOT, 
$2); }
+       | expr T_OR expr                        { $$ = expr_alloc_two(E_OR, $1, 
$3); }
+       | expr T_AND expr                       { $$ = expr_alloc_two(E_AND, 
$1, $3); }
+;
+
+symbol:          T_WORD        { $$ = sym_lookup($1, 0); free($1); }
+       | T_WORD_QUOTE  { $$ = sym_lookup($1, SYMBOL_CONST); free($1); }
+;
+
+word_opt: /* empty */                  { $$ = NULL; }
+       | T_WORD
+
+%%
+
+void conf_parse(const char *name)
+{
+       struct symbol *sym;
+       int i;
+
+       zconf_initscan(name);
+
+       sym_init();
+       _menu_init();
+       rootmenu.prompt = menu_add_prompt(P_MENU, "Linux Kernel Configuration", 
NULL);
+
+       if (getenv("ZCONF_DEBUG"))
+               zconfdebug = 1;
+       zconfparse();
+       if (zconfnerrs)
+               exit(1);
+       if (!modules_sym)
+               modules_sym = sym_find( "n" );
+
+       rootmenu.prompt->text = _(rootmenu.prompt->text);
+       rootmenu.prompt->text = sym_expand_string_value(rootmenu.prompt->text);
+
+       menu_finalize(&rootmenu);
+       for_all_symbols(i, sym) {
+               if (sym_check_deps(sym))
+                       zconfnerrs++;
+       }
+       if (zconfnerrs)
+               exit(1);
+       sym_set_change_count(1);
+}
+
+static const char *zconf_tokenname(int token)
+{
+       switch (token) {
+       case T_MENU:            return "menu";
+       case T_ENDMENU:         return "endmenu";
+       case T_CHOICE:          return "choice";
+       case T_ENDCHOICE:       return "endchoice";
+       case T_IF:              return "if";
+       case T_ENDIF:           return "endif";
+       case T_DEPENDS:         return "depends";
+       case T_VISIBLE:         return "visible";
+       }
+       return "<token>";
+}
+
+static bool zconf_endtoken(const struct kconf_id *id, int starttoken, int 
endtoken)
+{
+       if (id->token != endtoken) {
+               zconf_error("unexpected '%s' within %s block",
+                       kconf_id_strings + id->name, 
zconf_tokenname(starttoken));
+               zconfnerrs++;
+               return false;
+       }
+       if (current_menu->file != current_file) {
+               zconf_error("'%s' in different file than '%s'",
+                       kconf_id_strings + id->name, 
zconf_tokenname(starttoken));
+               fprintf(stderr, "%s:%d: location of the '%s'\n",
+                       current_menu->file->name, current_menu->lineno,
+                       zconf_tokenname(starttoken));
+               zconfnerrs++;
+               return false;
+       }
+       return true;
+}
+
+static void zconfprint(const char *err, ...)
+{
+       va_list ap;
+
+       fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
+       va_start(ap, err);
+       vfprintf(stderr, err, ap);
+       va_end(ap);
+       fprintf(stderr, "\n");
+}
+
+static void zconf_error(const char *err, ...)
+{
+       va_list ap;
+
+       zconfnerrs++;
+       fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
+       va_start(ap, err);
+       vfprintf(stderr, err, ap);
+       va_end(ap);
+       fprintf(stderr, "\n");
+}
+
+static void zconferror(const char *err)
+{
+       fprintf(stderr, "%s:%d: %s\n", zconf_curname(), zconf_lineno() + 1, 
err);
+}
+
+static void print_quoted_string(FILE *out, const char *str)
+{
+       const char *p;
+       int len;
+
+       putc('"', out);
+       while ((p = strchr(str, '"'))) {
+               len = p - str;
+               if (len)
+                       fprintf(out, "%.*s", len, str);
+               fputs("\\\"", out);
+               str = p + 1;
+       }
+       fputs(str, out);
+       putc('"', out);
+}
+
+static void print_symbol(FILE *out, struct menu *menu)
+{
+       struct symbol *sym = menu->sym;
+       struct property *prop;
+
+       if (sym_is_choice(sym))
+               fprintf(out, "\nchoice\n");
+       else
+               fprintf(out, "\nconfig %s\n", sym->name);
+       switch (sym->type) {
+       case S_BOOLEAN:
+               fputs("  boolean\n", out);
+               break;
+       case S_TRISTATE:
+               fputs("  tristate\n", out);
+               break;
+       case S_STRING:
+               fputs("  string\n", out);
+               break;
+       case S_INT:
+               fputs("  integer\n", out);
+               break;
+       case S_HEX:
+               fputs("  hex\n", out);
+               break;
+       default:
+               fputs("  ???\n", out);
+               break;
+       }
+       for (prop = sym->prop; prop; prop = prop->next) {
+               if (prop->menu != menu)
+                       continue;
+               switch (prop->type) {
+               case P_PROMPT:
+                       fputs("  prompt ", out);
+                       print_quoted_string(out, prop->text);
+                       if (!expr_is_yes(prop->visible.expr)) {
+                               fputs(" if ", out);
+                               expr_fprint(prop->visible.expr, out);
+                       }
+                       fputc('\n', out);
+                       break;
+               case P_DEFAULT:
+                       fputs( "  default ", out);
+                       expr_fprint(prop->expr, out);
+                       if (!expr_is_yes(prop->visible.expr)) {
+                               fputs(" if ", out);
+                               expr_fprint(prop->visible.expr, out);
+                       }
+                       fputc('\n', out);
+                       break;
+               case P_CHOICE:
+                       fputs("  #choice value\n", out);
+                       break;
+               case P_SELECT:
+                       fputs( "  select ", out);
+                       expr_fprint(prop->expr, out);
+                       fputc('\n', out);
+                       break;
+               case P_RANGE:
+                       fputs( "  range ", out);
+                       expr_fprint(prop->expr, out);
+                       fputc('\n', out);
+                       break;
+               case P_MENU:
+                       fputs( "  menu ", out);
+                       print_quoted_string(out, prop->text);
+                       fputc('\n', out);
+                       break;
+               default:
+                       fprintf(out, "  unknown prop %d!\n", prop->type);
+                       break;
+               }
+       }
+       if (menu->help) {
+               int len = strlen(menu->help);
+               while (menu->help[--len] == '\n')
+                       menu->help[len] = 0;
+               fprintf(out, "  help\n%s\n", menu->help);
+       }
+}
+
+void zconfdump(FILE *out)
+{
+       struct property *prop;
+       struct symbol *sym;
+       struct menu *menu;
+
+       menu = rootmenu.list;
+       while (menu) {
+               if ((sym = menu->sym))
+                       print_symbol(out, menu);
+               else if ((prop = menu->prompt)) {
+                       switch (prop->type) {
+                       case P_COMMENT:
+                               fputs("\ncomment ", out);
+                               print_quoted_string(out, prop->text);
+                               fputs("\n", out);
+                               break;
+                       case P_MENU:
+                               fputs("\nmenu ", out);
+                               print_quoted_string(out, prop->text);
+                               fputs("\n", out);
+                               break;
+                       default:
+                               ;
+                       }
+                       if (!expr_is_yes(prop->visible.expr)) {
+                               fputs("  depends ", out);
+                               expr_fprint(prop->visible.expr, out);
+                               fputc('\n', out);
+                       }
+               }
+
+               if (menu->list)
+                       menu = menu->list;
+               else if (menu->next)
+                       menu = menu->next;
+               else while ((menu = menu->parent)) {
+                       if (menu->prompt && menu->prompt->type == P_MENU)
+                               fputs("\nendmenu\n", out);
+                       if (menu->next) {
+                               menu = menu->next;
+                               break;
+                       }
+               }
+       }
+}
+
+#include "zconf.lex.c"
+#include "util.c"
+#include "confdata.c"
+#include "expr.c"
+#include "symbol.c"
+#include "menu.c"
-- 
2.4.10


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