diff options
Diffstat (limited to 'Makefile.rules')
| -rw-r--r-- | Makefile.rules | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/Makefile.rules b/Makefile.rules index 205c89a983..3a1b415ad3 100644 --- a/Makefile.rules +++ b/Makefile.rules @@ -52,6 +52,7 @@ cmd_c_to_build = $(BUILDCC) $(BUILD_CFLAGS) \ cmd_c_to_host = $(HOSTCC) $(HOST_CFLAGS) -MMD -MF $@.d -o $@ \ $(sort $(foreach c,$($(*F)-objs),util/$(c:%.o=%.c)) $*.c) cmd_host_test = ./util/run_host_test $* $(silent) +cmd_date = ./util/getdate.sh > $@ cmd_version = ./util/getversion.sh > $@ cmd_mv_from_tmp = mv $(out)/$*.bin.tmp $(out)/$*.bin cmd_extractrw-y = dd if=$(out)/$(PROJECT).bin.tmp of=$(out)/$(PROJECT).RW.bin \ @@ -179,10 +180,33 @@ $(out)/vboot/%.o:$(VBOOT_SOURCE)/%.c $(out)/%.o:%.S $(call quiet,c_to_o,AS ) -$(out)/common/version.o: $(out)/ec_version.h -$(out)/ec_version.h: $(filter-out $(out)/common/version.o,$(objs)) +# Conditionally force the rebuilding of ec_version.h only if it would be +# changed. +old_version_hash := $(shell cat $(out)/ec_version.h 2> /dev/null | md5sum -) +new_version_hash := $(shell BOARD=$(BOARD) ./util/getversion.sh | md5sum -) + +ifneq ($(old_version_hash),$(new_version_hash)) +.PHONY: $(out)/ec_version.h +endif + +# All of the objects have an order only dependency on the ec_version header. +# This ensures that if ec_version.h needs to be build (because it was marked +# PHONY above) then it will be rebuilt before any objects. This is important +# because some source files will include ev_version.h and fail to compile if +# it doesn't already exist. This dependency shouldn't be a normal dependency +# because that would cause every object to be rebuilt when ec_version.h +# changes, instead of just the ones that actually depend on it. The objects +# that truly depend on ec_version.h will have that information encoded in their +# .d file. +$(objs): | $(out)/ec_version.h + +$(out)/ec_version.h: $(call quiet,version,VERSION) +$(out)/common/version.o: $(out)/ec_date.h +$(out)/ec_date.h: $(filter-out $(out)/common/version.o,$(objs)) + $(call quiet,date,DATE ) + $(out)/gen_pub_key.h: $(PEM) $(call quiet,pubkey,PUBKEY ) |