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kbuild: asm symlink support for arch/$ARCH/include

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Adjust the asm symlink support so we do not create the
symlink unless really needed.
We check the precense of include/asm-$ARCH by checking
for the system.h file. We may end up with a stale directory
so it is not enough to check if the directory is present.

Signed-off-by: Sam Ravnborg <[email protected]>
This commit is contained in:
Sam Ravnborg 2008-06-22 21:42:06 +02:00
commit 2e57d05116
2 changed files with 29 additions and 16 deletions
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42
Makefile
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@ -925,7 +925,9 @@ ifneq ($(KBUILD_SRC),)
/bin/false; \
fi;
$(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
$(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
$(Q)if [ -e $(srctree)/include/asm-$(SRCARCH)/system.h ]; then \
ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
fi
endif
# prepare2 creates a makefile if using a separate output directory
@ -951,22 +953,34 @@ export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
# The asm symlink changes when $(ARCH) changes.
# Detect this and ask user to run make mrproper
include/asm: FORCE
$(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \
if [ -L include/asm ]; then \
if [ "$$asmlink" != "$(SRCARCH)" ]; then \
define check-symlink
set -e; \
if [ -L include/asm ]; then \
asmlink=`readlink include/asm | cut -d '-' -f 2`; \
if [ "$$asmlink" != "$(SRCARCH)" ]; then \
echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
exit 1; \
fi; \
else \
echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
if [ ! -d include ]; then \
mkdir -p include; \
fi; \
ln -fsn asm-$(SRCARCH) $@; \
exit 1; \
fi; \
fi
endef
# We create the target directory of the symlink if it does
# not exist so the test in chack-symlink works and we have a
# directory for generated filesas used by some architectures.
define create-symlink
if [ ! -L include/asm ]; then \
echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
if [ ! -d include/asm-$(SRCARCH) ]; then \
mkdir -p include/asm-$(SRCARCH); \
fi; \
ln -fsn asm-$(SRCARCH) $@; \
fi
endef
include/asm: FORCE
$(Q)$(check-symlink)
$(Q)$(create-symlink)
# Generate some files
# ---------------------------------------------------------------------------