[PATCH] perf: Fix version when building out of tree - v2

[David Ahern <dsahern@gmail.com>]

When building perf 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.

Fix by saving the perf version in the tar file and using that for the
out of tree builds.

v2: removed short form request and fixed up version string from usual output

Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
---
 scripts/package/Makefile         | 4 +++-
 tools/perf/util/PERF-VERSION-GEN | 3 +++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/scripts/package/Makefile b/scripts/package/Makefile
index a4f31c900fa6..c5d473393816 100644
--- a/scripts/package/Makefile
+++ b/scripts/package/Makefile
@@ -115,7 +115,9 @@ git --git-dir=$(srctree)/.git archive --prefix=$(perf-tar)/         \
 	-o $(perf-tar).tar;                                         \
 mkdir -p $(perf-tar);                                               \
 git --git-dir=$(srctree)/.git rev-parse HEAD > $(perf-tar)/HEAD;    \
-tar rf $(perf-tar).tar $(perf-tar)/HEAD;                            \
+(cd $(srctree)/tools/perf;                                          \
+util/PERF-VERSION-GEN ../../$(perf-tar)/ 2>/dev/null);              \
+tar rf $(perf-tar).tar $(perf-tar)/HEAD $(perf-tar)/PERF-VERSION-FILE; \
 rm -r $(perf-tar);                                                  \
 $(if $(findstring tar-src,$@),,                                     \
 $(if $(findstring bz2,$@),bzip2,                                    \
diff --git a/tools/perf/util/PERF-VERSION-GEN b/tools/perf/util/PERF-VERSION-GEN
index 15a77b7c0e36..00d88be4e50c 100755
--- a/tools/perf/util/PERF-VERSION-GEN
+++ b/tools/perf/util/PERF-VERSION-GEN
@@ -19,6 +19,9 @@ if test -d ../../.git -o -f ../../.git
 then
 	TAG=$(git describe --abbrev=0 --match "v[0-9].[0-9]*" 2>/dev/null )
 	CID=$(git log -1 --abbrev=4 --pretty=format:"%h" 2>/dev/null) && CID="-g$CID"
+elif test -f ../../PERF-VERSION-FILE
+then
+	TAG=$(cut -d' ' -f3 ../../PERF-VERSION-FILE | sed -e 's/\"//g')
 fi
 if test -z "$TAG"
 then
-- 
1.8.3.4 (Apple Git-47)