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

[Stephen Rothwell]

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).

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?

-- 
Cheers,
Stephen Rothwell                    sfr@xxxxxxxxxxxxxxxx
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