Hi Naresh,

On Tue, Jun 06, 2023 at 01:57:46PM +0530, Naresh Kamboju wrote:

Linux next-20230606 powerpc build failed.

Regressions found on powerpc:

• build/clang-16-maple_defconfig
• build/clang-nightly-maple_defconfig
• build/clang-16-defconfig
• build/clang-nightly-defconfig
• build/clang-nightly-cell_defconfig
• build/clang-16-cell_defconfig

Boot:

make --silent --keep-going --jobs=8 O=/home/tuxbuild/.cache/tuxmake/builds/1/build ARCH=powerpc CROSS_COMPILE=powerpc64le-linux-gnu- HOSTCC=clang CC=clang LLVM=1 LLVM_IAS=0 LD=powerpc64le-linux-gnu-ld

arch/powerpc/kernel/exceptions-64s.S: Assembler messages: arch/powerpc/kernel/exceptions-64s.S:2976: Error: junk at end of line: `0b01010' arch/powerpc/kernel/exceptions-64s.S:2996: Error: junk at end of line: `0b01010' arch/powerpc/kernel/exceptions-64s.S:3011: Error: junk at end of line: `0b01010' arch/powerpc/kernel/exceptions-64s.S:3029: Error: junk at end of line: `0b01010' arch/powerpc/kernel/exceptions-64s.S:3049: Error: junk at end of line: `0b01010' arch/powerpc/kernel/exceptions-64s.S:3096: Error: junk at end of line: `0b01010' clang: error: assembler command failed with exit code 1 (use -v to see invocation) make[4]: *** [scripts/Makefile.build:374: arch/powerpc/kernel/head_64.o] Error 1 arch/powerpc/kernel/entry_64.S: Assembler messages: arch/powerpc/kernel/entry_64.S:174: Error: junk at end of line: `0b01010' clang: error: assembler command failed with exit code 1 (use -v to see invocation) make[4]: *** [scripts/Makefile.build:374: arch/powerpc/kernel/entry_64.o] Error 1 make[4]: Target 'arch/powerpc/kernel/' not remade because of errors. make[3]: *** [scripts/Makefile.build:494: arch/powerpc/kernel] Error 2 arch/powerpc/lib/copyuser_power7.S: Assembler messages: arch/powerpc/lib/copyuser_power7.S:305: Error: junk at end of line: `0b01000' arch/powerpc/lib/copyuser_power7.S:306: Error: junk at end of line: `0b01010' arch/powerpc/lib/copyuser_power7.S:308: Error: junk at end of line: `0b01000' arch/powerpc/lib/copyuser_power7.S:309: Error: junk at end of line: `0b01010' arch/powerpc/lib/copyuser_power7.S:311: Error: junk at end of line: `0b01010' clang: error: assembler command failed with exit code 1 (use -v to see invocation) make[4]: *** [scripts/Makefile.build:374: arch/powerpc/lib/copyuser_power7.o] Error 1 arch/powerpc/lib/copypage_power7.S: Assembler messages: arch/powerpc/lib/copypage_power7.S:34: Error: junk at end of line: `0b01000' arch/powerpc/lib/copypage_power7.S:35: Error: junk at end of line: `0b01010' arch/powerpc/lib/copypage_power7.S:37: Error: junk at end of line: `0b01000' arch/powerpc/lib/copypage_power7.S:38: Error: junk at end of line: `0b01010' arch/powerpc/lib/copypage_power7.S:40: Error: junk at end of line: `0b01010' clang: error: assembler command failed with exit code 1 (use -v to see invocation) make[4]: *** [scripts/Makefile.build:374: arch/powerpc/lib/copypage_power7.o] Error 1 arch/powerpc/lib/memcpy_power7.S: Assembler messages: arch/powerpc/lib/memcpy_power7.S:250: Error: junk at end of line: `0b01000' arch/powerpc/lib/memcpy_power7.S:251: Error: junk at end of line: `0b01010' arch/powerpc/lib/memcpy_power7.S:252: Error: junk at end of line: `0b01000' arch/powerpc/lib/memcpy_power7.S:253: Error: junk at end of line: `0b01010' arch/powerpc/lib/memcpy_power7.S:255: Error: junk at end of line: `0b01010' clang: error: assembler command failed with exit code 1 (use -v to see invocation) make[4]: *** [scripts/Makefile.build:374: arch/powerpc/lib/memcpy_power7.o] Error 1

Reported-by: Linux Kernel Functional Testing lkft@linaro.org

Thank you for the report, this is caused by the move of CLANG_FLAGS from KBUILD_{A,C}FLAGS to KBUILD_CPPFLAGS, as as-option does not contain KBUILD_CPPFLAGS, so we fail to pass necessary flags to the assembler. The following diff resolves this particular issue for me, can you test it to make sure it works for you? I will write up a changelog and sent along a formal patch later today.

Cheers, Nathan

diff --git a/scripts/Makefile.compiler b/scripts/Makefile.compiler index 437013f8def3..e31f18625fcf 100644 --- a/scripts/Makefile.compiler +++ b/scripts/Makefile.compiler @@ -32,7 +32,7 @@ try-run = $(shell set -e; \ # Usage: aflags-y += $(call as-option,-Wa$(comma)-isa=foo,)

as-option = $(call try-run,\ - $(CC) -Werror $(KBUILD_AFLAGS) $(1) -c -x assembler-with-cpp /dev/null -o "$$TMP",$(1),$(2)) + $(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(1) -c -x assembler-with-cpp /dev/null -o "$$TMP",$(1),$(2))

# as-instr # Usage: aflags-y += $(call as-instr,instr,option1,option2)