Re: [PATCH 2/2] LoongArch: Include KBUILD_CPPFLAGS in CHECKFLAGS invocation

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On Tue, Jun 27, 2023 at 09:01:22PM +0800, WANG Xuerui wrote:
> From: WANG Xuerui <git@xxxxxxxxxx>
> 
> This is a port of commit 08f6554ff90e ("mips: Include KBUILD_CPPFLAGS
> in CHECKFLAGS invocation") to arch/loongarch, for fixing
> cross-compilation of Linux/LoongArch with Clang, where previously the
> `--target` flag would no longer be present for the CHECKFLAGS cc
> invocation leading to build failure.
> 
> Reported-by: Nathan Chancellor <nathan@xxxxxxxxxx>
> Link: https://github.com/ClangBuiltLinux/linux/issues/1787#issuecomment-1608306002
> Signed-off-by: WANG Xuerui <git@xxxxxxxxxx>

Thanks for the patch!

Reviewed-by: Nathan Chancellor <nathan@xxxxxxxxxx>

> ---
>  arch/loongarch/Makefile | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/loongarch/Makefile b/arch/loongarch/Makefile
> index a63683da3bcf..09ba338a64de 100644
> --- a/arch/loongarch/Makefile
> +++ b/arch/loongarch/Makefile
> @@ -112,7 +112,7 @@ KBUILD_CFLAGS += -isystem $(shell $(CC) -print-file-name=include)
>  KBUILD_LDFLAGS	+= -m $(ld-emul)
>  
>  ifdef CONFIG_LOONGARCH
> -CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
> +CHECKFLAGS += $(shell $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
>  	grep -E -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \
>  	sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
>  endif
> -- 
> 2.40.0
> 



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