On Sun, Jan 21, 2024 at 10:10:09AM -0800, Eric Biggers wrote: > On Sun, Jan 21, 2024 at 10:32:59PM +0800, Andy Chiu wrote: > > > > Maybe what we really should do is to upgrade the condition check to a > > one liner shell script and grep if "Warning" is being printed. Sadly > > this warning is not failing the compilation with -Werror. > > > > I can try forming a patch on this if it feels alright to people. > > What about -Wa,--fatal-warnings ? I suspect that would work, the following diff appears to work for me with a version of clang that does and does not support '.option arch', (although I am not sure if adding -Wa,--fatal-warnings will have any other consequences): diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index bffbd869a068..e3142ce531a0 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -315,7 +315,6 @@ config AS_HAS_OPTION_ARCH # https://reviews.llvm.org/D123515 def_bool y depends on $(as-instr, .option arch$(comma) +m) - depends on !$(as-instr, .option arch$(comma) -i) source "arch/riscv/Kconfig.socs" source "arch/riscv/Kconfig.errata" diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include index 5a84b6443875..3ee8ecfb8c04 100644 --- a/scripts/Kconfig.include +++ b/scripts/Kconfig.include @@ -33,7 +33,7 @@ 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) -c -x assembler-with-cpp -o /dev/null -) +as-instr = $(success,printf "%b\n" "$(1)" | $(CC) $(CLANG_FLAGS) -Wa$(comma)--fatal-warnings -c -x assembler-with-cpp -o /dev/null -) # check if $(CC) and $(LD) exist $(error-if,$(failure,command -v $(CC)),C compiler '$(CC)' not found)
