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/tes...

- Naresh