linux-kernel - Re: [PATCH v2] kconfig: fix an "implicit declaration of function" warning

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Date:   Sat, 11 Jan 2020 16:15:51 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: Re: [PATCH v2] kconfig: fix an "implicit declaration of function" warning

On Fri, Jan 10, 2020 at 1:16 AM Bartosz Golaszewski <brgl@...ev.pl> wrote:
>
> From: Bartosz Golaszewski <bgolaszewski@...libre.com>
>
> strncasecmp() & strcasecmp() functions are declared in strings.h, not
> string.h. On most environments the former is implicitly included by
> the latter but on some setups, building menuconfig results in the
> following warning:
>
>   HOSTCC  scripts/kconfig/mconf.o
> scripts/kconfig/mconf.c: In function ‘search_conf’:
> scripts/kconfig/mconf.c:423:6: warning: implicit declaration of function ‘strncasecmp’ [-Wimplicit-function-declaration]
>   if (strncasecmp(dialog_input_result, CONFIG_, strlen(CONFIG_)) == 0)
>       ^~~~~~~~~~~
> scripts/kconfig/mconf.c: In function ‘main’:
> scripts/kconfig/mconf.c:1021:8: warning: implicit declaration of function ‘strcasecmp’ [-Wimplicit-function-declaration]
>    if (!strcasecmp(mode, "single_menu"))
>         ^~~~~~~~~~
>
> Fix it by explicitly including strings.h.
>
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>

Applied to linux-kbuild.
Thanks.


-- 
Best Regards
Masahiro Yamada