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

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Message-ID: <CAMpxmJX50pBQTDdsy=w1+uNQym+vGnZJiCrWBDmn0ti3igCjvQ@mail.gmail.com>
Date:   Thu, 9 Jan 2020 17:03:09 +0100
From:   Bartosz Golaszewski <bgolaszewski@...libre.com>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     Bartosz Golaszewski <brgl@...ev.pl>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] kconfig: fix an "implicit declaration of function" warning

czw., 9 sty 2020 o 16:59 Masahiro Yamada <masahiroy@...nel.org> napisał(a):
>
> On Thu, Jan 9, 2020 at 9:56 PM 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>
>
> Thanks.
>
> I see strncasecmp() in
> scripts/kconfig/nconf.c too.
>
> Could you fix both in a single patch?
>
> You can try it with "make nconfig".

Sure. It seems gconf needs the same change too.

Bart