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Date: Thu, 31 Oct 2013 17:31:55 -0600
From: David Ahern <dsahern@gmail.com>
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To: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>,
        LKML <linux-kernel@vger.kernel.org>,
        Namhyung Kim <namhyung@kernel.org>, Jiri Olsa <jolsa@redhat.com>,
        Ingo Molnar <mingo@kernel.org>
Subject: perf version not set when building out of tree
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When building out of tree:

make perf-tar-src-pkg
tar -xf perf-<ver>.tar -C /tmp
cd /tmp/perf<ver>
make -C tools/perf

you get the warning message:
make[1]: *** No rule to make target `kernelversion'.  Stop.

which comes from tools/perf/util/PERF-VERSION-GEN,

if test -z "$TAG"
then
     TAG=$(MAKEFLAGS= make -sC ../.. kernelversion)
fi

There is no top level Makefile. perf is actually built, but has no 
version info:

$ tools/perf/perf --version
perf version

I thought someone had proposed a way to fix that.

David