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[XEN PATCH for-4.17 v6 1/5] libs: Fix auto-generation of version-script for unstable libs

  • To: <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Anthony PERARD <anthony.perard@xxxxxxxxxx>
  • Date: Fri, 20 Jan 2023 19:44:27 +0000
  • Authentication-results: esa4.hc3370-68.iphmx.com; dkim=none (message not signed) header.i=none
  • Cc: Anthony PERARD <anthony.perard@xxxxxxxxxx>, Andrew Cooper <Andrew.Cooper3@xxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Juergen Gross <jgross@xxxxxxxx>
  • Delivery-date: Fri, 20 Jan 2023 19:45:03 +0000
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  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
When there isn't a version-script for a shared library (like for
unstable libs), we create one based on the current Xen version. But
that version-script became out-of-date as soon as Xen's version
changes and make as no way to regenerate the version-script on
rebuild.

For unstable libs, we only needs the symver to be different from a
previous release of Xen. There's an option "--default-symver" which
allow to use the soname as symver and as the soname have the Xen
release version, it will be different for every release. With
--default-symver we don't need to generate a version-script.

But we also need to know if there's already an existing version script
, for that we introduce $(version-script) to be used to point to the
path of the existing script. (Guessing if a version script exist for a
stable library with for example $(wildcard) won't work as a file will
exist when building the library without this patch.)

We don't need the version-script unless we are making the shared
library so it is removed from the "all" target.

Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---

Notes:
    v6:
    - use --default-symver instead of generating a version-script.
      (option was available in binutils 2.16, according to the doc, so that
      should work.)
    
    v4:
    - new patch
    
    CC: Andrew Cooper <Andrew.Cooper3@xxxxxxxxxx>

 tools/libs/call/Makefile          |  1 +
 tools/libs/ctrl/Makefile          |  3 ---
 tools/libs/devicemodel/Makefile   |  1 +
 tools/libs/evtchn/Makefile        |  1 +
 tools/libs/foreignmemory/Makefile |  1 +
 tools/libs/gnttab/Makefile        |  1 +
 tools/libs/guest/Makefile         |  3 ---
 tools/libs/hypfs/Makefile         |  1 +
 tools/libs/light/Makefile         |  1 -
 tools/libs/stat/Makefile          |  2 +-
 tools/libs/store/Makefile         |  1 +
 tools/libs/toolcore/Makefile      |  1 +
 tools/libs/toollog/Makefile       |  1 +
 tools/libs/util/Makefile          |  3 ---
 tools/libs/vchan/Makefile         |  3 ---
 tools/libs/libs.mk                | 10 ++++------
 .gitignore                        |  6 ------
 17 files changed, 14 insertions(+), 26 deletions(-)

diff --git a/tools/libs/call/Makefile b/tools/libs/call/Makefile
index 103f5ad360..56a964b517 100644
--- a/tools/libs/call/Makefile
+++ b/tools/libs/call/Makefile
@@ -3,6 +3,7 @@ include $(XEN_ROOT)/tools/Rules.mk
 
 MAJOR    = 1
 MINOR    = 3
+version-script := libxencall.map
 
 include Makefile.common
 
diff --git a/tools/libs/ctrl/Makefile b/tools/libs/ctrl/Makefile
index 93442ab389..094e84b8d8 100644
--- a/tools/libs/ctrl/Makefile
+++ b/tools/libs/ctrl/Makefile
@@ -10,6 +10,3 @@ PKG_CONFIG_NAME := Xencontrol
 NO_HEADERS_CHK := y
 
 include $(XEN_ROOT)/tools/libs/libs.mk
-
-clean::
-       rm -f libxenctrl.map
diff --git a/tools/libs/devicemodel/Makefile b/tools/libs/devicemodel/Makefile
index b70dd774e4..20d1d112e7 100644
--- a/tools/libs/devicemodel/Makefile
+++ b/tools/libs/devicemodel/Makefile
@@ -3,6 +3,7 @@ include $(XEN_ROOT)/tools/Rules.mk
 
 MAJOR    = 1
 MINOR    = 4
+version-script := libxendevicemodel.map
 
 include Makefile.common
 
diff --git a/tools/libs/evtchn/Makefile b/tools/libs/evtchn/Makefile
index 3dad3840c6..18cdaab89e 100644
--- a/tools/libs/evtchn/Makefile
+++ b/tools/libs/evtchn/Makefile
@@ -3,6 +3,7 @@ include $(XEN_ROOT)/tools/Rules.mk
 
 MAJOR    = 1
 MINOR    = 2
+version-script := libxenevtchn.map
 
 include Makefile.common
 
diff --git a/tools/libs/foreignmemory/Makefile 
b/tools/libs/foreignmemory/Makefile
index b70dd774e4..81398e88b1 100644
--- a/tools/libs/foreignmemory/Makefile
+++ b/tools/libs/foreignmemory/Makefile
@@ -3,6 +3,7 @@ include $(XEN_ROOT)/tools/Rules.mk
 
 MAJOR    = 1
 MINOR    = 4
+version-script := libxenforeignmemory.map
 
 include Makefile.common
 
diff --git a/tools/libs/gnttab/Makefile b/tools/libs/gnttab/Makefile
index 3dad3840c6..4528830bdc 100644
--- a/tools/libs/gnttab/Makefile
+++ b/tools/libs/gnttab/Makefile
@@ -3,6 +3,7 @@ include $(XEN_ROOT)/tools/Rules.mk
 
 MAJOR    = 1
 MINOR    = 2
+version-script := libxengnttab.map
 
 include Makefile.common
 
diff --git a/tools/libs/guest/Makefile b/tools/libs/guest/Makefile
index 19d3ff2fdb..93338a9301 100644
--- a/tools/libs/guest/Makefile
+++ b/tools/libs/guest/Makefile
@@ -14,6 +14,3 @@ NO_HEADERS_CHK := y
 include $(XEN_ROOT)/tools/libs/libs.mk
 
 libxenguest.so.$(MAJOR).$(MINOR): LDLIBS += $(ZLIB_LIBS) -lz
-
-clean::
-       rm -f libxenguest.map
diff --git a/tools/libs/hypfs/Makefile b/tools/libs/hypfs/Makefile
index 630e1e6f3e..7fae5c750d 100644
--- a/tools/libs/hypfs/Makefile
+++ b/tools/libs/hypfs/Makefile
@@ -3,6 +3,7 @@ include $(XEN_ROOT)/tools/Rules.mk
 
 MAJOR    = 1
 MINOR    = 0
+version-script := libxenhypfs.map
 
 LDLIBS += -lz
 
diff --git a/tools/libs/light/Makefile b/tools/libs/light/Makefile
index 4fddcc6f51..cd3fa855e1 100644
--- a/tools/libs/light/Makefile
+++ b/tools/libs/light/Makefile
@@ -262,6 +262,5 @@ clean::
        $(RM) testidl.c.new testidl.c *.api-ok
        $(RM) $(TEST_PROGS) libxenlight_test.so libxl_test_*.opic
        $(RM) -r __pycache__
-       $(RM) libxenlight.map
        $(RM) $(AUTOSRCS) $(AUTOINCS)
        $(MAKE) -C $(ACPI_PATH) ACPI_BUILD_DIR=$(CURDIR) clean
diff --git a/tools/libs/stat/Makefile b/tools/libs/stat/Makefile
index 7eaf50e91e..ee5c42bf7b 100644
--- a/tools/libs/stat/Makefile
+++ b/tools/libs/stat/Makefile
@@ -134,4 +134,4 @@ uninstall:: uninstall-perl-bindings
 endif
 
 clean::
-       $(RM) libxenstat.map $(BINDINGS) $(BINDINGSRC)
+       $(RM) $(BINDINGS) $(BINDINGSRC)
diff --git a/tools/libs/store/Makefile b/tools/libs/store/Makefile
index 3557a8c76d..daed9d148f 100644
--- a/tools/libs/store/Makefile
+++ b/tools/libs/store/Makefile
@@ -3,6 +3,7 @@ include $(XEN_ROOT)/tools/Rules.mk
 
 MAJOR = 4
 MINOR = 0
+version-script := libxenstore.map
 
 ifeq ($(CONFIG_Linux),y)
 LDLIBS += -ldl
diff --git a/tools/libs/toolcore/Makefile b/tools/libs/toolcore/Makefile
index 0d92b68b3b..20671dadd0 100644
--- a/tools/libs/toolcore/Makefile
+++ b/tools/libs/toolcore/Makefile
@@ -3,6 +3,7 @@ include $(XEN_ROOT)/tools/Rules.mk
 
 MAJOR  = 1
 MINOR  = 0
+version-script := libxentoolcore.map
 
 LIBHEADER := xentoolcore.h
 
diff --git a/tools/libs/toollog/Makefile b/tools/libs/toollog/Makefile
index 2361b8cbf1..d612227c85 100644
--- a/tools/libs/toollog/Makefile
+++ b/tools/libs/toollog/Makefile
@@ -3,6 +3,7 @@ include $(XEN_ROOT)/tools/Rules.mk
 
 MAJOR  = 1
 MINOR  = 0
+version-script := libxentoollog.map
 
 include Makefile.common
 
diff --git a/tools/libs/util/Makefile b/tools/libs/util/Makefile
index 493d2e00be..e016baf888 100644
--- a/tools/libs/util/Makefile
+++ b/tools/libs/util/Makefile
@@ -47,6 +47,3 @@ $(OBJS-y) $(PIC_OBJS): $(AUTOINCS)
 %.c %.h:: %.l
        @rm -f $*.[ch]
        $(FLEX) --header-file=$*.h --outfile=$*.c $<
-
-clean::
-       $(RM) libxenutil.map
diff --git a/tools/libs/vchan/Makefile b/tools/libs/vchan/Makefile
index ac2bff66f5..a1ef60ac8e 100644
--- a/tools/libs/vchan/Makefile
+++ b/tools/libs/vchan/Makefile
@@ -11,6 +11,3 @@ OBJS-y += io.o
 NO_HEADERS_CHK := y
 
 include $(XEN_ROOT)/tools/libs/libs.mk
-
-clean::
-       rm -f libxenvchan.map
diff --git a/tools/libs/libs.mk b/tools/libs/libs.mk
index 3eb91fc8f3..0e4b5e0bd0 100644
--- a/tools/libs/libs.mk
+++ b/tools/libs/libs.mk
@@ -4,6 +4,7 @@
 #   PKG_CONFIG: name of pkg-config file (xen$(LIBNAME).pc if empty)
 #   MAJOR:   major version of lib (Xen version if empty)
 #   MINOR:   minor version of lib (0 if empty)
+#   version-script: Specify the name of a version script to the linker.
 
 LIBNAME := $(notdir $(CURDIR))
 
@@ -53,7 +54,7 @@ $(PKG_CONFIG_LOCAL): PKG_CONFIG_INCDIR = $(XEN_INCLUDE)
 $(PKG_CONFIG_LOCAL): PKG_CONFIG_LIBDIR = $(CURDIR)
 
 .PHONY: all
-all: $(TARGETS) $(PKG_CONFIG_LOCAL) libxen$(LIBNAME).map $(LIBHEADERS)
+all: $(TARGETS) $(PKG_CONFIG_LOCAL) $(LIBHEADERS)
 
 ifneq ($(NO_HEADERS_CHK),y)
 all: headers.chk
@@ -71,9 +72,6 @@ headers.lst: FORCE
        @{ set -e; $(foreach h,$(LIBHEADERS),echo $(h);) } > $@.tmp
        @$(call move-if-changed,$@.tmp,$@)
 
-libxen$(LIBNAME).map:
-       echo 'VERS_$(MAJOR).$(MINOR) { global: *; };' >$@
-
 lib$(LIB_FILE_NAME).a: $(OBJS-y)
        $(AR) rc $@ $^
 
@@ -82,8 +80,8 @@ lib$(LIB_FILE_NAME).so: lib$(LIB_FILE_NAME).so.$(MAJOR)
 lib$(LIB_FILE_NAME).so.$(MAJOR): lib$(LIB_FILE_NAME).so.$(MAJOR).$(MINOR)
        $(SYMLINK_SHLIB) $< $@
 
-lib$(LIB_FILE_NAME).so.$(MAJOR).$(MINOR): $(PIC_OBJS) libxen$(LIBNAME).map
-       $(CC) $(LDFLAGS) $(PTHREAD_LDFLAGS) -Wl,$(SONAME_LDFLAG) 
-Wl,lib$(LIB_FILE_NAME).so.$(MAJOR) -Wl,--version-script=libxen$(LIBNAME).map 
$(SHLIB_LDFLAGS) -o $@ $(PIC_OBJS) $(LDLIBS) $(APPEND_LDFLAGS)
+lib$(LIB_FILE_NAME).so.$(MAJOR).$(MINOR): $(PIC_OBJS) $(version-script)
+       $(CC) $(LDFLAGS) $(PTHREAD_LDFLAGS) -Wl,$(SONAME_LDFLAG) 
-Wl,lib$(LIB_FILE_NAME).so.$(MAJOR) -Wl,$(if 
$(version-script),--version-script=$(version-script),--default-symver) 
$(SHLIB_LDFLAGS) -o $@ $(PIC_OBJS) $(LDLIBS) $(APPEND_LDFLAGS)
 
 # If abi-dumper is available, write out the ABI analysis
 ifneq ($(ABI_DUMPER),)
diff --git a/.gitignore b/.gitignore
index 880ba88c55..d9c906670d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -110,8 +110,6 @@ tools/config.cache
 config/Tools.mk
 config/Stubdom.mk
 config/Docs.mk
-tools/libs/ctrl/libxenctrl.map
-tools/libs/guest/libxenguest.map
 tools/libs/guest/xc_bitops.h
 tools/libs/guest/xc_core.h
 tools/libs/guest/xc_core_arm.h
@@ -121,7 +119,6 @@ tools/libs/light/_*.[ch]
 tools/libs/light/*.pyc
 tools/libs/light/_libxl.api-for-check
 tools/libs/light/*.api-ok
-tools/libs/light/libxenlight.map
 tools/libs/light/libxl-save-helper
 tools/libs/light/dsdt*
 tools/libs/light/mk_dsdt
@@ -131,13 +128,10 @@ tools/libs/light/testidl.c
 tools/libs/light/test_timedereg
 tools/libs/light/test_fdderegrace
 tools/libs/light/tmp.*
-tools/libs/stat/libxenstat.map
 tools/libs/store/list.h
 tools/libs/store/utils.h
 tools/libs/store/xs_lib.c
 tools/libs/util/libxlu_cfg_y.output
-tools/libs/util/libxenutil.map
-tools/libs/vchan/libxenvchan.map
 tools/debugger/gdb/gdb-6.2.1-linux-i386-xen/*
 tools/debugger/gdb/gdb-6.2.1/*
 tools/debugger/gdb/gdb-6.2.1.tar.bz2
-- 
Anthony PERARD

 

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