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[Xen-devel] [PATCH] build: Conditional build/clean/distclean targets on subsystems

The commit 3378685 "Add conditional build of subsystems to configure.ac"
allows the user to disable/enable some components of Xen. After this commit
some targets are still called on every subsystems.

For Xen on ARM, the makefile targets build, clean and distclean will failed.

Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
 Makefile |   57 +++++++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 51 insertions(+), 6 deletions(-)

diff --git a/Makefile b/Makefile
index 32efb70..2217c20 100644
--- a/Makefile
+++ b/Makefile
@@ -10,6 +10,9 @@ all: dist
 SUBSYSTEMS?=xen kernels tools stubdom docs
 TARGS_DIST=$(patsubst %, dist-%, $(SUBSYSTEMS))
 TARGS_INSTALL=$(patsubst %, install-%, $(SUBSYSTEMS))
+TARGS_BUILD=$(patsubst %, install-%, $(SUBSYSTEMS))
+TARGS_CLEAN=$(patsubst %, clean-%, $(SUBSYSTEMS))
+TARGS_DISTCLEAN=$(patsubst %, distclean-%, $(SUBSYSTEMS))
 export XEN_ROOT=$(CURDIR)
 include Config.mk
@@ -23,15 +26,28 @@ include buildconfigs/Rules.mk
 install: $(TARGS_INSTALL)
 .PHONY: build
-build: kernels
+build: $(TARGS_BUILD)
+.PHONY: build-xen
        $(MAKE) -C xen build
+.PHONY: build-tools
        $(MAKE) -C tools build
+.PHONY: build-stubdom
        $(MAKE) -C stubdom build
 ifeq (x86_64,$(XEN_TARGET_ARCH))
        XEN_TARGET_ARCH=x86_32 $(MAKE) -C stubdom pv-grub
+.PHONY: build-docs
        $(MAKE) -C docs build
+build-kernels: kernels
 # The test target is for unit tests that can run without an installation.  Of
 # course, many tests require a machine running Xen itself, and these are
 # handled elsewhere.
@@ -146,30 +162,59 @@ debball: dist
 # clean doesn't do a kclean
 .PHONY: clean
+clean:: $(TARGS_CLEAN)
+.PHONY: clean-xen
        $(MAKE) -C xen clean
+.PHONY: clean-tools
        $(MAKE) -C tools clean
+.PHONY: clean-stubdom
        $(MAKE) -C stubdom crossclean
 ifeq (x86_64,$(XEN_TARGET_ARCH))
        XEN_TARGET_ARCH=x86_32 $(MAKE) -C stubdom crossclean
+.PHONY: clean-docs
        $(MAKE) -C docs clean
+       @: # do nothing
 # clean, but blow away kernel build tree plus tarballs
 .PHONY: distclean
+distclean: $(TARGS_DISTCLEAN)
        -rm config/Toplevel.mk
+       rm -rf dist patches/tmp
+       rm -rf patches/*/.makedep
+       rm -rf config.log config.status config.cache autom4te.cache
+.PHONY: distclean-xen
        $(MAKE) -C xen distclean
+.PHONY: distclean-tools
        $(MAKE) -C tools distclean
+.PHONY: distclean-stubdom
        $(MAKE) -C stubdom distclean
 ifeq (x86_64,$(XEN_TARGET_ARCH))
        XEN_TARGET_ARCH=x86_32 $(MAKE) -C stubdom distclean
+.PHONY: distclean-docs
        $(MAKE) -C docs distclean
-       rm -rf dist patches/tmp
        for i in $(ALLKERNELS) ; do $(MAKE) $$i-delete ; done
-       rm -rf patches/*/.makedep
-       rm -rf config.log config.status config.cache autom4te.cache
 # Linux name for GNU distclean
 .PHONY: mrproper

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