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From: Namhyung Kim <namhyung@kernel.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>,
        linux-kernel@vger.kernel.org, Andi Kleen <andi@firstfloor.org>,
        Arun Sharma <asharma@fb.com>,
        Benjamin Redelings <benjamin.redelings@nescent.org>,
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        "Frank Ch. Eigler" <fche@redhat.com>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        Ingo Molnar <mingo@redhat.com>, Jiri Olsa <jolsa@redhat.com>,
        Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
        Mike Galbraith <efault@gmx.de>, Namhyung Kim <namhyung.kim@lge.com>,
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        Shan Wei <davidshan@tencent.com>,
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Subject: Re: [GIT PULL 00/20] perf/core improvements
References: <1340128221-17348-1-git-send-email-acme@infradead.org>
	<20120620120141.GB1925@gmail.com> <1340201223.1520.5.camel@leonhard>
	<20120620144902.GB2007@gmail.com>
Date: Fri, 22 Jun 2012 13:16:11 +0900
In-Reply-To: <20120620144902.GB2007@gmail.com> (Ingo Molnar's message of "Wed,
	20 Jun 2012 16:49:02 +0200")
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Hi, Ingo

On Wed, 20 Jun 2012 16:49:02 +0200, Ingo Molnar wrote:
> Well, 'make' should notice that they are stale or should 
> regenerate them all the time.
>

Could you check the patch below does it?


diff --git a/tools/lib/traceevent/Makefile b/tools/lib/traceevent/Makefile
index 3d69aa9ff51e..42f018e15f36 100644
--- a/tools/lib/traceevent/Makefile
+++ b/tools/lib/traceevent/Makefile
@@ -250,8 +250,12 @@ endef
 all_objs := $(sort $(ALL_OBJS))
 all_deps := $(all_objs:%.o=.%.d)
 
+# let .d file also depends on the source and header files
 define check_deps
-               $(CC) -M $(CFLAGS) $< > $@;
+               @set -e; $(RM) $@; \
+               $(CC) -M $(CFLAGS) $< > $@.$$$$; \
+               sed 's,\($*\)\.o[ :]*,\1.o $@ : ,g' < $@.$$$$ > $@; \
+               $(RM) $@.$$$$
 endef
 
 $(gui_deps): ks_version.h
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