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authorStefan Hajnoczi <stefanha@redhat.com>2015-10-28 14:45:10 +0000
committerStefan Hajnoczi <stefanha@redhat.com>2016-01-07 16:59:38 +0800
commit9967e4fec0dc6c0157f37574dd33ddd03ca3bee8 (patch)
tree5838384f79d41ef38075e24da513d12d71af7366 /trace
parentc6daed8654bb1a4d085d9229e5a7dd5363794180 (diff)
downloadqemu-arm-9967e4fec0dc6c0157f37574dd33ddd03ca3bee8.tar.gz
trace: fix make foo-timestamp rules
The Makefile uses intermediate timestamp files to avoid rebuilding if tracetool output is unchanged. Timestamps are implemented incorrectly. This was fixed for rules.mak in commit 4b25966ab976f3a7fd9008193b2defcc82f8f04d ("rules.mak: cleanup config generation rules") but never fixed in trace/Makefile.objs. The problem with the old timestamp implementation was that make doesn't notice the updated file modification time until the next time it is run. It was necessary to run make twice in a row to achieve a full rebuild. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'trace')
-rw-r--r--trace/Makefile.objs18
1 files changed, 9 insertions, 9 deletions
diff --git a/trace/Makefile.objs b/trace/Makefile.objs
index 32f7a32ce2..73bec383fc 100644
--- a/trace/Makefile.objs
+++ b/trace/Makefile.objs
@@ -5,20 +5,20 @@
ifeq ($(findstring ust,$(TRACE_BACKENDS)),ust)
$(obj)/generated-ust-provider.h: $(obj)/generated-ust-provider.h-timestamp
+ @cmp $< $@ >/dev/null 2>&1 || cp $< $@
$(obj)/generated-ust-provider.h-timestamp: $(SRC_PATH)/trace-events
$(call quiet-command,$(TRACETOOL) \
--format=ust-events-h \
--backends=$(TRACE_BACKENDS) \
< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
- @cmp -s $@ $(patsubst %-timestamp,%,$@) || cp $@ $(patsubst %-timestamp,%,$@)
$(obj)/generated-ust.c: $(obj)/generated-ust.c-timestamp $(BUILD_DIR)/config-host.mak
+ @cmp $< $@ >/dev/null 2>&1 || cp $< $@
$(obj)/generated-ust.c-timestamp: $(SRC_PATH)/trace-events
$(call quiet-command,$(TRACETOOL) \
--format=ust-events-c \
--backends=$(TRACE_BACKENDS) \
< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
- @cmp -s $@ $(patsubst %-timestamp,%,$@) || cp $@ $(patsubst %-timestamp,%,$@)
$(obj)/generated-events.h: $(obj)/generated-ust-provider.h
$(obj)/generated-events.c: $(obj)/generated-ust.c
@@ -28,20 +28,20 @@ endif
# Auto-generated event descriptions
$(obj)/generated-events.h: $(obj)/generated-events.h-timestamp
+ @cmp $< $@ >/dev/null 2>&1 || cp $< $@
$(obj)/generated-events.h-timestamp: $(SRC_PATH)/trace-events
$(call quiet-command,$(TRACETOOL) \
--format=events-h \
--backends=$(TRACE_BACKENDS) \
< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
- @cmp -s $@ $(patsubst %-timestamp,%,$@) || cp $@ $(patsubst %-timestamp,%,$@)
$(obj)/generated-events.c: $(obj)/generated-events.c-timestamp $(BUILD_DIR)/config-host.mak
+ @cmp $< $@ >/dev/null 2>&1 || cp $< $@
$(obj)/generated-events.c-timestamp: $(SRC_PATH)/trace-events
$(call quiet-command,$(TRACETOOL) \
--format=events-c \
--backends=$(TRACE_BACKENDS) \
< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
- @cmp -s $@ $(patsubst %-timestamp,%,$@) || cp $@ $(patsubst %-timestamp,%,$@)
util-obj-y += generated-events.o
@@ -81,12 +81,12 @@ $(obj)/generated-tracers.o: $(obj)/generated-tracers.c $(obj)/generated-tracers.
# rule file. So we use '.dtrace' instead
ifeq ($(findstring dtrace,$(TRACE_BACKENDS)),dtrace)
$(obj)/generated-tracers-dtrace.dtrace: $(obj)/generated-tracers-dtrace.dtrace-timestamp
+ @cmp $< $@ >/dev/null 2>&1 || cp $< $@
$(obj)/generated-tracers-dtrace.dtrace-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
$(call quiet-command,$(TRACETOOL) \
--format=d \
--backends=$(TRACE_BACKENDS) \
< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
- @cmp -s $@ $(patsubst %-timestamp,%,$@) || cp $@ $(patsubst %-timestamp,%,$@)
$(obj)/generated-tracers-dtrace.h: $(obj)/generated-tracers-dtrace.dtrace
$(call quiet-command,dtrace -o $@ -h -s $<, " GEN $@")
@@ -100,28 +100,28 @@ endif
# Translation level
$(obj)/generated-helpers-wrappers.h: $(obj)/generated-helpers-wrappers.h-timestamp
+ @cmp $< $@ >/dev/null 2>&1 || cp $< $@
$(obj)/generated-helpers-wrappers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
$(call quiet-command,$(TRACETOOL) \
--format=tcg-helper-wrapper-h \
--backend=$(TRACE_BACKENDS) \
< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
- @cmp -s $@ $(patsubst %-timestamp,%,$@) || cp $@ $(patsubst %-timestamp,%,$@)
$(obj)/generated-helpers.h: $(obj)/generated-helpers.h-timestamp
+ @cmp $< $@ >/dev/null 2>&1 || cp $< $@
$(obj)/generated-helpers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
$(call quiet-command,$(TRACETOOL) \
--format=tcg-helper-h \
--backend=$(TRACE_BACKENDS) \
< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
- @cmp -s $@ $(patsubst %-timestamp,%,$@) || cp $@ $(patsubst %-timestamp,%,$@)
$(obj)/generated-helpers.c: $(obj)/generated-helpers.c-timestamp
+ @cmp $< $@ >/dev/null 2>&1 || cp $< $@
$(obj)/generated-helpers.c-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
$(call quiet-command,$(TRACETOOL) \
--format=tcg-helper-c \
--backend=$(TRACE_BACKENDS) \
< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
- @cmp -s $@ $(patsubst %-timestamp,%,$@) || cp $@ $(patsubst %-timestamp,%,$@)
$(obj)/generated-helpers.o: $(obj)/generated-helpers.c
@@ -129,12 +129,12 @@ target-obj-y += generated-helpers.o
$(obj)/generated-tcg-tracers.h: $(obj)/generated-tcg-tracers.h-timestamp
+ @cmp $< $@ >/dev/null 2>&1 || cp $< $@
$(obj)/generated-tcg-tracers.h-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak
$(call quiet-command,$(TRACETOOL) \
--format=tcg-h \
--backend=$(TRACE_BACKENDS) \
< $< > $@," GEN $(patsubst %-timestamp,%,$@)")
- @cmp -s $@ $(patsubst %-timestamp,%,$@) || cp $@ $(patsubst %-timestamp,%,$@)
######################################################################