Date: Mon, 25 Jun 2012 10:22:25 +0200
From: Ingo Molnar <mingo@kernel.org>
To: Namhyung Kim <namhyung@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>,
        Corey Ashford <cjashfor@linux.vnet.ibm.com>,
        Cyrill Gorcunov <gorcunov@openvz.org>, David Ahern <dsahern@gmail.com>,
        "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>,
        Paul Mackerras <paulus@samba.org>, Pekka Enberg <penberg@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Robert Richter <robert.richter@amd.com>,
        Shan Wei <davidshan@tencent.com>,
        Stephane Eranian <eranian@google.com>,
        Tom Zanussi <tzanussi@gmail.com>
Subject: Re: [GIT PULL 00/20] perf/core improvements
Message-ID: <20120625082225.GB24512@gmail.com>
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* Namhyung Kim <namhyung@kernel.org> wrote:

> 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

Yeah, something like this should do the trick.

Thanks,

	Ingo
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