Re: [Qemu-trivial] [Qemu-devel] [PATCH] audio: Replace macro GCC_ATTR by GCC_FMT_ATTR and use inline functions

["Andreas Färber" <afaerber@suse.de>]

Am 11.06.2013 14:38, schrieb Michael Tokarev:
> [Removing malc's email since it bounces]
> 09.06.2013 16:22, Stefan Weil wrote:
>> GCC_ATTR was only used in audio_int.h, so it is now unused and
>> the definition can be removed from compiler.h.
>>
>> Signed-off-by: Stefan Weil <sw@weilnetz.de>
>> ---
>>  audio/audio_int.h       |    8 +++-----
>>  include/qemu/compiler.h |    3 ---
>>  2 files changed, 3 insertions(+), 8 deletions(-)
>>
>> diff --git a/audio/audio_int.h b/audio/audio_int.h
>> index b9b0676..5a6284b 100644
>> --- a/audio/audio_int.h
>> +++ b/audio/audio_int.h
>> @@ -243,7 +243,7 @@ static inline int audio_ring_dist (int dst, int src, int len)
>>      return (dst >= src) ? (dst - src) : (len - src + dst);
>>  }
>>  
>> -static void GCC_ATTR dolog (const char *fmt, ...)
>> +static inline void GCC_FMT_ATTR(1, 2) dolog (const char *fmt, ...)
> 
> This change (adding `inline') causes build failure with at least with gcc-4.7:
> 
> audio/wavaudio.c: In function ‘dolog’:
> audio/audio_int.h:246:100: error: function ‘dolog’ can never be inlined because it uses variable argument lists
> 
> $ gcc --version
> gcc (Debian 4.7.2-5) 4.7.2
> 
> I think the addition of inline should be dropped here and in other
> similar places (the rest is ok).
> 
> I can do that myself if you want.

But having a static function in the header still needs the __unused__
attribute, which this patch tries to remove, doesn't it?

Andreas

> 
> Alternatively these functions can be turned into varargs #defines.
> 
> Thanks,
> 
> /mjt
> 


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