linux-kernel - Re: [PATCH] kbuild: flatten KBUILD

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Date:   Fri, 14 Jul 2023 12:42:11 +0200
From:   Nicolas Schier <nicolas@...sle.eu>
To:     Alexey Dobriyan <adobriyan@...il.com>
Cc:     akpm@...ux-foundation.org, masahiroy@...nel.org, nathan@...nel.org,
        ndesaulniers@...gle.com, linux-kernel@...r.kernel.org,
        linux-kbuild@...r.kernel.org
Subject: Re: [PATCH] kbuild: flatten KBUILD_CFLAGS

On Thu, Jul 13, 2023 at 09:52:28PM +0300, Alexey Dobriyan wrote:
> Make it slightly easier to see which compiler options are added and
> removed (and not worry about column limit too!).
> 
> Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
> ---
> 
>  Makefile |   22 +++++++++++++++++-----
>  1 file changed, 17 insertions(+), 5 deletions(-)
> 
> --- a/Makefile
> +++ b/Makefile
> @@ -555,11 +555,23 @@ LINUXINCLUDE    := \
>  		$(USERINCLUDE)
>  
>  KBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
> -KBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
> -		   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
> -		   -Werror=implicit-function-declaration -Werror=implicit-int \
> -		   -Werror=return-type -Wno-format-security -funsigned-char \
> -		   -std=gnu11
> +
> +KBUILD_CFLAGS :=
> +KBUILD_CFLAGS += -std=gnu11

If you want to put -std at top, on contrast to the sorted options below,
you could also merge the two lines above.

> +KBUILD_CFLAGS += -fshort-wchar
> +KBUILD_CFLAGS += -funsigned-char
> +KBUILD_CFLAGS += -fno-common
> +KBUILD_CFLAGS += -fno-PIE
> +KBUILD_CFLAGS += -fno-strict-aliasing
> +KBUILD_CFLAGS += -Wall
> +KBUILD_CFLAGS += -Wundef
> +KBUILD_CFLAGS += -Werror=implicit-function-declaration
> +KBUILD_CFLAGS += -Werror=implicit-int
> +KBUILD_CFLAGS += -Werror=return-type
> +KBUILD_CFLAGS += -Werror=strict-prototypes
> +KBUILD_CFLAGS += -Wno-format-security
> +KBUILD_CFLAGS += -Wno-trigraphs
> +
>  KBUILD_CPPFLAGS := -D__KERNEL__
>  KBUILD_RUSTFLAGS := $(rust_common_flags) \
>  		    --target=$(objtree)/scripts/target.json \

Thanks for the patch.

Reviewed-by: Nicolas Schier <n.schier@....de>

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