linux-kernel - Re: [PATCH v2] Makefile: enable -Werror=implicit-int and -Werror=strict-prototypes by default

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Date:	Thu, 15 Aug 2013 14:18:48 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Sergei Trofimovich <slyfox@...too.org>
Cc:	linux-kernel@...r.kernel.org, Michal Marek <mmarek@...e.cz>,
	linux-kbuild@...r.kernel.org
Subject: Re: [PATCH v2] Makefile: enable -Werror=implicit-int and
 -Werror=strict-prototypes by default

On Thu, 15 Aug 2013 21:37:31 +0300 Sergei Trofimovich <slyfox@...too.org> wrote:

> The common error type found in forward-ported/backported patches is missing headers.
> One recent example (files and function names are mangled):
> 
>     void foo(){}
>     EXPORT_SYMBOL(foo);
> 
> gave only warning
> 
>     foo.c:12345678:5: warning: function declaration isn't a prototype [-Wstrict-prototypes]
>     void foo(){}
>          ^
> 
>     foo.c:12345679:5: warning: data definition has no type or storage class [enabled by default]
>     EXPORT_SYMBOL(foo);
>     foo.c:12345679:5: warning: type defaults to 'int' in declaration of 'EXORT_SYMBOL' [-Werror=implicit-int]
> 
> Now it's a fata error. Tested on x86_64 allyesconfig.

Yes, let's try that.

Partly because the build still generates far too many warnings..
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