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Kbuild: Check if offsets.h was updated

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Do not rebuild offsets.h if it was not changed.

Change-Id: Idd7a4c0f1dad0575f09b84de1f47a92d20c05e70
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
This commit is contained in:
Anas Nashif 2015-08-28 15:04:39 -04:00
commit bdcf909978
1 changed files with 18 additions and 3 deletions
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21
Kbuild
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@ -92,8 +92,23 @@ cmd_cc_o_c_1 = $(CC) $(KBUILD_CFLAGS) $(OFFSETS_INCLUDE) -c -o $@ $<
arch/$(SRCARCH)/core/offsets/offsets.o: arch/$(SRCARCH)/core/offsets/offsets.c
$(Q)mkdir -p $(dir $@)
$(call if_changed_rule,cc_o_c_1)
$(call if_changed,cc_o_c_1)
$(obj)/include/generated/offsets.h: $(GENOFFSET_H) arch/$(SRCARCH)/core/offsets/offsets.o include/config/auto.conf FORCE
$(Q)$(GENOFFSET_H) -i arch/$(SRCARCH)/core/offsets/offsets.o -o $@
define offsetchk
$(Q)set -e; \
$(kecho) ' CHK $@'; \
mkdir -p $(dir $@); \
$(GENOFFSET_H) -i $(1) -o $@.tmp; \
if [ -r $@ ] && cmp -s $@ $@.tmp; then \
rm -f $@.tmp; \
else \
$(kecho) ' UPD $@'; \
mv -f $@.tmp $@; \
fi
endef
include/generated/offsets.h: $(GENOFFSET_H) arch/$(SRCARCH)/core/offsets/offsets.o \
include/config/auto.conf FORCE
$(call offsetchk,arch/$(SRCARCH)/core/offsets/offsets.o)