Messages in this thread | | | From | Naresh Kamboju <> | Date | Mon, 26 Dec 2022 19:34:51 +0530 | Subject | Re: [PATCH 8/8] btrfs: turn on -Wmaybe-uninitialized |
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On Mon, 26 Dec 2022 at 09:47, Nathan Chancellor <nathan@kernel.org> wrote: > > On Fri, Dec 16, 2022 at 03:15:58PM -0500, Josef Bacik wrote: > > We had a recent bug that would have been caught by a newer compiler with > > -Wmaybe-uninitialized and would have saved us a month of failing tests > > that I didn't have time to investigate. > > > > Signed-off-by: Josef Bacik <josef@toxicpanda.com> > > This needs to be moved to the condflags section, as > -Wmaybe-uninitialized is a GCC only flag, so this breaks our builds with > clang on next-20221226: > > error: unknown warning option '-Wmaybe-uninitialized'; did you mean '-Wuninitialized'? [-Werror,-Wunknown-warning-option]
LKFT test farm also noticed these build breaks with clang on next-20221226.
Regressions found on arm64, riscv, s390 and powerpc
- build/clang-lkftconfig - build/clang-15-lkftconfig - build/clang-15-defconfig-40bc7ee5 - build/clang-15-defconfig - build/clang-nightly-defconfig - build/clang-15-lkftconfig-compat - build/clang-nightly-defconfig-40bc7ee5 - build/clang-nightly-lkftconfig
make --silent --keep-going --jobs=8 O=/home/tuxbuild/.cache/tuxmake/builds/1/build LLVM=1 LLVM_IAS=1 ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- 'HOSTCC=sccache clang' 'CC=sccache clang'
error: unknown warning option '-Wmaybe-uninitialized'; did you mean '-Wuninitialized'? [-Werror,-Wunknown-warning-option] make[4]: *** [/builds/linux/scripts/Makefile.build:252: fs/btrfs/super.o] Error 1
> I can send a patch on Tuesday unless the original commit can be amended.
ref: https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20221226/testrun/13818773/suite/build/test/clang-15-defconfig/details/
- Naresh
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