# git rev-parse -q --verify feb843a469fb0ab00d2d23cfb9bcc379791011bb^{commit}
# git fetch -q -n -f git://gitlab.ozlabs.ibm.com/mirror/linux-kbuild.git for-next
remote: warning: multi-pack bitmap is missing required reverse index        
# git rev-parse -q --verify feb843a469fb0ab00d2d23cfb9bcc379791011bb^{commit}
feb843a469fb0ab00d2d23cfb9bcc379791011bb
# git checkout -q -f -B kisskb feb843a469fb0ab00d2d23cfb9bcc379791011bb
# git clean -qxdf
# < git log -1
# commit feb843a469fb0ab00d2d23cfb9bcc379791011bb
# Author: Masahiro Yamada <masahiroy@kernel.org>
# Date:   Sun Apr 9 23:53:57 2023 +0900
# 
#     kbuild: add $(CLANG_FLAGS) to KBUILD_CPPFLAGS
#     
#     When preprocessing arch/*/kernel/vmlinux.lds.S, the target triple is
#     not passed to $(CPP) because we add it only to KBUILD_{C,A}FLAGS.
#     
#     As a result, the linker script is preprocessed with predefined macros
#     for the build host instead of the target.
#     
#     Assuming you use an x86 build machine, compare the following:
#     
#      $ clang -dM -E -x c /dev/null
#      $ clang -dM -E -x c /dev/null -target aarch64-linux-gnu
#     
#     There is no actual problem presumably because our linker scripts do not
#     rely on such predefined macros, but it is better to define correct ones.
#     
#     Move $(CLANG_FLAGS) to KBUILD_CPPFLAGS, so that all *.c, *.S, *.lds.S
#     will be processed with the proper target triple.
#     
#     [Note]
#     After the patch submission, we got an actual problem that needs this
#     commit. (CBL issue 1859)
#     
#     Link: https://github.com/ClangBuiltLinux/linux/issues/1859
#     Reported-by: Tom Rini <trini@konsulko.com>
#     Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
#     Reviewed-by: Nathan Chancellor <nathan@kernel.org>
#     Tested-by: Nathan Chancellor <nathan@kernel.org>
# < /opt/cross/kisskb/korg/gcc-11.3.0-nolibc/aarch64-linux/bin/aarch64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-11.3.0-nolibc/aarch64-linux/bin/aarch64-linux-ld --version
# < git log --format=%s --max-count=1 feb843a469fb0ab00d2d23cfb9bcc379791011bb
# < make -s -j 40 ARCH=arm64 O=/kisskb/build/kbuild_arm64-defconfig_arm64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.3.0-nolibc/aarch64-linux/bin/aarch64-linux-  defconfig
# < make -s -j 40 ARCH=arm64 O=/kisskb/build/kbuild_arm64-defconfig_arm64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.3.0-nolibc/aarch64-linux/bin/aarch64-linux-  help
# make -s -j 40 ARCH=arm64 O=/kisskb/build/kbuild_arm64-defconfig_arm64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.3.0-nolibc/aarch64-linux/bin/aarch64-linux-  olddefconfig
# make -s -j 40 ARCH=arm64 O=/kisskb/build/kbuild_arm64-defconfig_arm64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.3.0-nolibc/aarch64-linux/bin/aarch64-linux-  
Completed OK
# rm -rf /kisskb/build/kbuild_arm64-defconfig_arm64-gcc11
# Build took: 0:05:10.478651