Hi Catalin, On 17/01/2020 11:33, Catalin Marinas wrote: > On Mon, Dec 16, 2019 at 02:17:16PM +0530, Amit Daniel Kachhap wrote: >> diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include >> index d4adfbe..cc465dd 100644 >> --- a/scripts/Kconfig.include >> +++ b/scripts/Kconfig.include >> @@ -31,6 +31,10 @@ cc-option = $(success,$(CC) -Werror $(CLANG_FLAGS) $(1) -E -x c /dev/null -o /de >> # Return y if the linker supports <flag>, n otherwise >> ld-option = $(success,$(LD) -v $(1)) >> >> +# $(as-option,<flag>) >> +# Return y if the assembler supports <flag>, n otherwise >> +as-option = $(success, $(CC) $(CLANG_FLAGS) $(1) -E -x assembler /dev/null -o /dev/null) > > I had different experiments with this for MTE and noticed that clang > does not honour the -Wa, option (which you use in a subsequent patch). > So not sure how useful as-option is. > Not sure of your experiments for MTE, the kernel is built with clang but uses the GNU assembler. The -Wa, option is passed down to the assembler (GNU) which honors it. Said that, I agree with Masahiro Yamada about the "-c" option to be used in place of "-E" and on that sense I provided a patch to Amit last December which should be integrated in the next series (Amit can confirm, I hope ;) ). -- Regards, Vincenzo
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