linux-kernel - Re: [PATCH] Makefile.extrawarn: remove -Wnested-externs warning

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Date:   Wed, 25 Nov 2020 13:20:39 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Nathan Chancellor <natechancellor@...il.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>
Subject: Re: [PATCH] Makefile.extrawarn: remove -Wnested-externs warning

On Wed, Nov 25, 2020 at 12:43 AM Arnd Bergmann <arnd@...nel.org> wrote:
>
> From: Arnd Bergmann <arnd@...db.de>
>
> The -Wnested-externs warning has become useless with gcc, since
> this warns every time that BUILD_BUG_ON() or similar macros
> are used.
>
> With clang, the warning option does nothing to start with, so
> just remove it entirely.
>
> Suggested-by: Nathan Chancellor <natechancellor@...il.com>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---

Applied to linux-kbuild.
Thanks.


>  scripts/Makefile.extrawarn | 1 -
>  1 file changed, 1 deletion(-)
>
> diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn
> index 6baee1200615..d53825503874 100644
> --- a/scripts/Makefile.extrawarn
> +++ b/scripts/Makefile.extrawarn
> @@ -61,7 +61,6 @@ endif
>  ifneq ($(findstring 2, $(KBUILD_EXTRA_WARN)),)
>
>  KBUILD_CFLAGS += -Wdisabled-optimization
> -KBUILD_CFLAGS += -Wnested-externs
>  KBUILD_CFLAGS += -Wshadow
>  KBUILD_CFLAGS += $(call cc-option, -Wlogical-op)
>  KBUILD_CFLAGS += -Wmissing-field-initializers
> --
> 2.27.0
>


-- 
Best Regards
Masahiro Yamada