[SLOF] [PATCH] libc: Add missing fallthrough annotation

[Alexey Kardashevskiy]

On 23/01/2021 10:34, Segher Boessenkool wrote:
> Hi!
> 
> On Fri, Jan 22, 2021 at 06:24:20PM +0100, Thomas Huth wrote:
>> On 22/01/2021 18.21, Philippe Mathieu-Daudé wrote:
>>> Silence warning when cross-compiling with GCC on Debian 10:
>>>
>>>    $ s390x-linux-gnu-gcc --version
>>>    s390x-linux-gnu-gcc (Debian 8.3.0-2) 8.3.0
>>>
>>>    lib/libc/stdio/vsnprintf.c: In function 'print_format':
>>>    lib/libc/stdio/vsnprintf.c:165:11: warning: this statement may fall
>>>    through [-Wimplicit-fallthrough=]
>>
>> Is -Wimplicit-fallthrough enabled by default there? Or did you enable it?
> 
> It is enabled by -W (aka -Wextra).  Everyone should always use that
> option (along with -Wall), but I do not know if SLOF does.

SLOF uses -Wall but not -Wextra which produces lot more warnings than 
this patch is fixing.



-- 
Alexey