From bdcf909978dfbeca2718610afa9835a040827f9f Mon Sep 17 00:00:00 2001 From: Anas Nashif Date: Fri, 28 Aug 2015 15:04:39 -0400 Subject: Kbuild: Check if offsets.h was updated Do not rebuild offsets.h if it was not changed. Change-Id: Idd7a4c0f1dad0575f09b84de1f47a92d20c05e70 Signed-off-by: Anas Nashif --- Kbuild | 21 ++++++++++++++++++--- 1 file changed, 18 insertions(+), 3 deletions(-) (limited to 'Kbuild') diff --git a/Kbuild b/Kbuild index cb97e73d4..b90297862 100644 --- a/Kbuild +++ b/Kbuild @@ -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) + + +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 $@; \ + fi +endef -$(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 $@ +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) -- cgit v1.2.3