Re: perf version not set when building out of tree

[David Ahern <dsahern@gmail.com>]

On 11/1/13, 1:02 AM, Ingo Molnar wrote:
> I think we should pack the PERF-VERSION-FILE with the tarball and
> use that. This needs roughly 3 changes:
>
>   - make PERF-VERSION-FILE part of the tarball
>   - make sure it's not zapped on 'make clean'
>   - don't try to regenerate it if there's no git repository to get a version from

Solution was actually kind of easy. The head commit is already saved to 
HEAD file when the tar is generated:

diff --git a/perf/tools/perf/util/PERF-VERSION-GEN 
b/perf/tools/perf/util/PERF-VERSION-GEN
index 15a77b7c0e36..2155882e7c1d 100755
--- a/perf/tools/perf/util/PERF-VERSION-GEN
+++ b/perf/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$CID"
+elif test -f ../../HEAD
+then
+   TAG=$(cat ../../HEAD)
  fi
  if test -z "$TAG"
  then

David