From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:57386) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Tv9Rh-0005pZ-Dj for qemu-devel@nongnu.org; Tue, 15 Jan 2013 11:33:11 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Tv9Ra-0000YS-P0 for qemu-devel@nongnu.org; Tue, 15 Jan 2013 11:33:05 -0500 Received: from mx1.redhat.com ([209.132.183.28]:50155) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Tv9Ra-0000Y8-GF for qemu-devel@nongnu.org; Tue, 15 Jan 2013 11:32:58 -0500 Received: from int-mx12.intmail.prod.int.phx2.redhat.com (int-mx12.intmail.prod.int.phx2.redhat.com [10.5.11.25]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id r0FGWvxx010260 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Tue, 15 Jan 2013 11:32:58 -0500 Received: from redhat.com ([10.35.212.26]) by int-mx12.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with SMTP id r0FGWult014974 for ; Tue, 15 Jan 2013 11:32:57 -0500 Date: Tue, 15 Jan 2013 18:36:56 +0200 From: "Michael S. Tsirkin" Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Subject: [Qemu-devel] [PATCH 2/4] Makefile: clean timestamp generation rule List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org create timestamp by rule without sideeffects. Signed-off-by: Michael S. Tsirkin --- trace/Makefile.objs | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/trace/Makefile.objs b/trace/Makefile.objs index 27fe26b..dde9d57 100644 --- a/trace/Makefile.objs +++ b/trace/Makefile.objs @@ -4,24 +4,24 @@ # Auto-generated header for tracing routines $(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 $(call quiet-command,$(TRACETOOL) \ --format=h \ --backend=$(TRACE_BACKEND) \ < $< > $@," GEN $(patsubst %-timestamp,%,$@)") - @cmp -s $@ $(patsubst %-timestamp,%,$@) || cp $@ $(patsubst %-timestamp,%,$@) ###################################################################### # Auto-generated tracing routines (non-DTrace) ifneq ($(TRACE_BACKEND),dtrace) $(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 $(call quiet-command,$(TRACETOOL) \ --format=c \ --backend=$(TRACE_BACKEND) \ < $< > $@," GEN $(patsubst %-timestamp,%,$@)") - @cmp -s $@ $(patsubst %-timestamp,%,$@) || cp $@ $(patsubst %-timestamp,%,$@) $(obj)/generated-tracers.o: $(obj)/generated-tracers.c $(obj)/generated-tracers.h endif -- MST