linux-kernel - Re: linux-next: build failure after merge of the tip tree

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Date:	Thu, 17 Sep 2015 10:34:23 +1000
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Jiri Olsa <jolsa@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: Re: linux-next: build failure after merge of the tip tree

Hi Jiri,

On Wed, 16 Sep 2015 08:16:52 +0200 Jiri Olsa <jolsa@...hat.com> wrote:
>
> On Wed, Sep 16, 2015 at 10:12:45AM +1000, Stephen Rothwell wrote:
> > 
> > After merging the tip tree, today's linux-next build (perf) failed
> > like this:
> > 
> > make[3]: *** No rule to make target 'tools/lib/api/fs/debugfs.h', needed by 'tools/perf/arch/common.o'.  Stop.
> > tools/build/Makefile.build:109: recipe for target 'arch' failed
> > make[4]: *** No rule to make target 'fs/debugfs.h', needed by 'tools/perf/fs/fs.o'.  Stop.
> > tools/build/Makefile.build:109: recipe for target 'fs' failed
> > make[3]: *** No rule to make target 'tools/lib/api/fs/debugfs.h', needed by 'tools/perf/util/abspath.o'.  Stop.
> > tools/build/Makefile.build:109: recipe for target 'util' failed
> > Makefile:32: recipe for target 'tools/perf/libapi-in.o' failed
> > Makefile.perf:417: recipe for target 'tools/perf/libapi.a' failed
> > Makefile.perf:393: recipe for target 'tools/perf/libperf-in.o' failed
> > Makefile:68: recipe for target 'all' failed
> > 
> > Maybe caused by commit
> > 
> >   60a1133a5b39 ("tools lib api fs: Remove debugfs, tracefs and findfs objects")
> > 
> > This is an incremental build i.e. I do not do a "make clean" after doing
> > the build for each tree merge (in case that matters).
> 
> it does in this case, removed header files stay in
> cmd build dependency file (like in .abspath.o.cmd above)
> and cause build error
> 
> build system is not smart enough yet to find out,
> I was postponning fixing this for some time now,
> I'll try to get this resolved asap

OK, for now I will clean out my objdir before doing the perf build
after the tip tree merge.  It would be nice to have this fixed, though,
if possible.

-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au
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