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- Make sure insn support detection uses the proper compiler flag in bi-arch

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Merge tag 'x86_build_for_v6.11_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 build update from Borislav Petkov:

 - Make sure insn support detection uses the proper compiler flag in
   bi-arch builds

* tag 'x86_build_for_v6.11_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/kconfig: Add as-instr64 macro to properly evaluate AS_WRUSS
This commit is contained in:
Linus Torvalds 2024-07-15 19:51:23 -07:00
parent 9319657544 469169803d
commit 1d86d35241
2 changed files with 3 additions and 2 deletions
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2
arch/x86/Kconfig.assembler
View file

@ -36,6 +36,6 @@ config AS_VPCLMULQDQ
Supported by binutils >= 2.30 and LLVM integrated assembler
config AS_WRUSS
def_bool $(as-instr,wrussq %rax$(comma)(%rbx))
def_bool $(as-instr64,wrussq %rax$(comma)(%rbx))
help
Supported by binutils >= 2.31 and LLVM integrated assembler

3
scripts/Kconfig.include
View file

@ -33,7 +33,8 @@ ld-option = $(success,$(LD) -v $(1))
# $(as-instr,<instr>)
# Return y if the assembler supports <instr>, n otherwise
as-instr = $(success,printf "%b\n" "$(1)" | $(CC) $(CLANG_FLAGS) -Wa$(comma)--fatal-warnings -c -x assembler-with-cpp -o /dev/null -)
as-instr = $(success,printf "%b\n" "$(1)" | $(CC) $(CLANG_FLAGS) $(2) -Wa$(comma)--fatal-warnings -c -x assembler-with-cpp -o /dev/null -)
as-instr64 = $(as-instr,$(1),$(m64-flag))
# check if $(CC) and $(LD) exist
$(error-if,$(failure,command -v $(CC)),C compiler '$(CC)' not found)