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

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Message-ID: <20150916063817.GC22064@krava.redhat.com>
Date:	Wed, 16 Sep 2015 08:38:17 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
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

On Wed, Sep 16, 2015 at 08:16:52AM +0200, Jiri Olsa wrote:
> On Wed, Sep 16, 2015 at 10:12:45AM +1000, Stephen Rothwell wrote:
> > Hi all,
> > 
> > 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
> 
> > 
> > I have used the tip tree from next-20150915 for today.
> > 
> > Also, building perf seems to ignore O=<dir> on the make invocation.
> > Is that expected?
> 
> hum, not sure about this one.. I'm not using it, but we have
> tests for this and I thought we're ok.. I'll check

seems to work on latest Arnaldo's perf/core,
what command line failed for you?

[jolsa@...va perf]$ make O=/tmp/krava/
...
[jolsa@...va perf]$ ll /tmp/krava/perf
-rwxrwxr-x. 1 jolsa jolsa 12669704 Sep 16 08:36 /tmp/krava/perf


jirka
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