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Makefile: clean timestamp generation rule

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create timestamp by rule without sideeffects.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2013-01-15 14:47:33 +02:00
parent 4b25966ab9
commit 6f329a5530
1 changed files with 2 additions and 2 deletions
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4
trace/Makefile.objs
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@ -4,24 +4,24 @@
# Auto-generated header for tracing routines # Auto-generated header for tracing routines
$(obj)/generated-tracers.h: $(obj)/generated-tracers.h-timestamp $(obj)/generated-tracers.h: $(obj)/generated-tracers.h-timestamp
@cmp -s $< $@ || cp $< $@
$(obj)/generated-tracers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak $(obj)/generated-tracers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
$(call quiet-command,$(TRACETOOL) \ $(call quiet-command,$(TRACETOOL) \
--format=h \ --format=h \
--backend=$(TRACE_BACKEND) \ --backend=$(TRACE_BACKEND) \
< $< > $@," GEN $(patsubst %-timestamp,%,$@)") < $< > $@," GEN $(patsubst %-timestamp,%,$@)")
@cmp -s $@ $(patsubst %-timestamp,%,$@) || cp $@ $(patsubst %-timestamp,%,$@)
###################################################################### ######################################################################
# Auto-generated tracing routines (non-DTrace) # Auto-generated tracing routines (non-DTrace)
ifneq ($(TRACE_BACKEND),dtrace) ifneq ($(TRACE_BACKEND),dtrace)
$(obj)/generated-tracers.c: $(obj)/generated-tracers.c-timestamp $(obj)/generated-tracers.c: $(obj)/generated-tracers.c-timestamp
@cmp -s $< $@ || cp $< $@
$(obj)/generated-tracers.c-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak $(obj)/generated-tracers.c-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
$(call quiet-command,$(TRACETOOL) \ $(call quiet-command,$(TRACETOOL) \
--format=c \ --format=c \
--backend=$(TRACE_BACKEND) \ --backend=$(TRACE_BACKEND) \
< $< > $@," GEN $(patsubst %-timestamp,%,$@)") < $< > $@," GEN $(patsubst %-timestamp,%,$@)")
@cmp -s $@ $(patsubst %-timestamp,%,$@) || cp $@ $(patsubst %-timestamp,%,$@)
$(obj)/generated-tracers.o: $(obj)/generated-tracers.c $(obj)/generated-tracers.h $(obj)/generated-tracers.o: $(obj)/generated-tracers.c $(obj)/generated-tracers.h
endif endif