Messages in this thread Patch in this message | | | From | Will Chandler <> | Subject | [PATCH] perf tools: Fix empty version number when building outside of a git repo | Date | Tue, 27 Sep 2022 15:52:28 -0400 |
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When perf is built in a full source tree that is not a git repository, e.g. from a kernel source tarball, `perf version` will print empty tag and commit strings:
$ perf version perf version
Currently the tag version is only generated from the root Makefile when building in a git repository. If PERF-VERSION-FILE has not been generated and the source tree is not in a git repository, then PERF-VERSION-GEN will return an empty version.
The problem can be reproduced with the following steps:
$ wget https://git.kernel.org/torvalds/t/linux-6.0-rc7.tar.gz $ tar -xf linux-6.0-rc7.tar.gz && cd linux-6.0-rc7 $ make -C tools/perf $ tools/perf/perf -v perf version
Builds from tarballs generated with `make perf-tar-src-pkg` are not impacted by this issue as PERF-VERSION-FILE is included in the archive.
The perf RPM provided by Fedora for 5.18+ is experiencing this problem. Package build logs[0] show that the build is attempting to fall back on PERF-VERSION-FILE, but it is not present.
To resolve this, always use the tag from the root Makefile if available.
[0] https://kojipkgs.fedoraproject.org/packages/kernel-tools/5.19.4/200.fc36/data/logs/x86_64/build.log
Fixes: 7572733b8499 ("perf tools: Fix version kernel tag, 2022-02-21") Signed-off-by: Will Chandler <wfc@wfchandler.org> --- tools/perf/util/PERF-VERSION-GEN | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/tools/perf/util/PERF-VERSION-GEN b/tools/perf/util/PERF-VERSION-GEN index 0ee5af529238..43b8a8ea6f53 100755 --- a/tools/perf/util/PERF-VERSION-GEN +++ b/tools/perf/util/PERF-VERSION-GEN @@ -15,10 +15,13 @@ LF=' # CID= TAG= -if test -d ../../.git -o -f ../../.git +if test -r ../../Makefile then TAG=$(MAKEFLAGS= make -sC ../.. kernelversion) - CID=$(git log -1 --abbrev=12 --pretty=format:"%h" 2>/dev/null) && CID="-g$CID" + if test -d ../../.git -o -f ../../.git + then + CID=$(git log -1 --abbrev=12 --pretty=format:"%h" 2>/dev/null) && CID="-g$CID" + fi else TAG=$(cut -d' ' -f3 ../../PERF-VERSION-FILE | sed -e 's/\"//g') fi -- 2.37.3
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