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kbuild: asm symlink support for arch/$ARCH/include
Adjust the asm symlink support so we do not create the symlink unless really needed. We check the precense of include/asm-$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 <sam@ravnborg.org>
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parent
a53ce098a7
commit
2e57d05116
2 changed files with 29 additions and 16 deletions
3
Kbuild
3
Kbuild
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@ -43,7 +43,7 @@ $(obj)/$(bounds-file): kernel/bounds.s Kbuild
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# 2) Generate asm-offsets.h
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#
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offsets-file := include/asm-$(SRCARCH)/asm-offsets.h
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offsets-file := include/asm/asm-offsets.h
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always += $(offsets-file)
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targets += $(offsets-file)
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@ -81,7 +81,6 @@ arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \
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$(call if_changed_dep,cc_s_c)
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$(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild
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$(Q)mkdir -p $(dir $@)
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$(call cmd,offsets)
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#####
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28
Makefile
28
Makefile
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@ -925,7 +925,9 @@ ifneq ($(KBUILD_SRC),)
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/bin/false; \
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fi;
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$(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
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$(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
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$(Q)if [ -e $(srctree)/include/asm-$(SRCARCH)/system.h ]; then \
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ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
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fi
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endif
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# prepare2 creates a makefile if using a separate output directory
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@ -951,22 +953,34 @@ export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
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# The asm symlink changes when $(ARCH) changes.
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# Detect this and ask user to run make mrproper
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include/asm: FORCE
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$(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \
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define check-symlink
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set -e; \
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if [ -L include/asm ]; then \
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asmlink=`readlink include/asm | cut -d '-' -f 2`; \
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if [ "$$asmlink" != "$(SRCARCH)" ]; then \
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echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
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echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
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exit 1; \
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fi; \
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else \
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fi
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endef
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# We create the target directory of the symlink if it does
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# not exist so the test in chack-symlink works and we have a
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# directory for generated filesas used by some architectures.
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define create-symlink
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if [ ! -L include/asm ]; then \
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echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
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if [ ! -d include ]; then \
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mkdir -p include; \
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if [ ! -d include/asm-$(SRCARCH) ]; then \
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mkdir -p include/asm-$(SRCARCH); \
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fi; \
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ln -fsn asm-$(SRCARCH) $@; \
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fi
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endef
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include/asm: FORCE
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$(Q)$(check-symlink)
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$(Q)$(create-symlink)
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# Generate some files
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# ---------------------------------------------------------------------------
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