Re: [PATCH 4/4] sh: remove compiler flag duplication

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On Sun, 2023-02-19 at 23:15 +0900, Masahiro Yamada wrote:
> Every compiler flag added by arch/sh/Makefile is passed to the
> compiler twice.
> 
> $(KBUILD_CPPFLAGS) + $(KBUILD_CFLAGS) is used for compiling *.c
> $(KBUILD_CPPFLAGS) + $(KBUILD_AFLAGS) is used for compiling *.S
> 
> Given the above, adding $(cflags-y) to all of KBUILD_{CPP/C/A}FLAGS
> ends up with duplication.
> 
> Add -I options to $(KBUILD_CPPFLAGS), and the rest of $(cflags-y)
> to KBUILD_{C,A}FLAGS.
> 
> Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
> ---
> 
>  arch/sh/Makefile | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/arch/sh/Makefile b/arch/sh/Makefile
> index f1c6aace8acb..cab2f9c011a8 100644
> --- a/arch/sh/Makefile
> +++ b/arch/sh/Makefile
> @@ -145,10 +145,8 @@ cpuincdir-y			+= cpu-common	# Must be last
>  
>  drivers-y			+= arch/sh/drivers/
>  
> -cflags-y	+= $(addprefix -I $(srctree)/arch/sh/include/, $(cpuincdir-y) $(machdir-y))
> -
> +KBUILD_CPPFLAGS		+= $(addprefix -I $(srctree)/arch/sh/include/, $(cpuincdir-y) $(machdir-y))
>  KBUILD_CFLAGS		+= -pipe $(cflags-y)
> -KBUILD_CPPFLAGS		+= $(cflags-y)
>  KBUILD_AFLAGS		+= $(cflags-y)
>  
>  ifeq ($(CONFIG_MCOUNT),y)

Reviewed-by: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer
`. `'   Physicist
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