[FFmpeg-devel] [PATCH] avutil/mem: Fix invalid use of av_alloc_size

[James Almer]

On 11/25/2018 10:01 PM, Michael Niedermayer wrote:
> On Sat, Nov 24, 2018 at 01:02:02PM -0800, Mark Harris wrote:
>> The alloc_size attribute is valid only on functions that return a
>> pointer.  GCC 9 (not yet released) warns about invalid usage:
>>
>> ./libavutil/mem.h:342:1: warning: 'alloc_size' attribute ignored on a function returning int' [-Wattributes]
>>   342 | av_alloc_size(2, 3) int av_reallocp_array(void *ptr, size_t nmemb, size_t size);
>>       | ^~~~~~~~~~~~~
> 
> Is the attribute also useless on all other compilers ?

The attribute is only used when __GNUC__ is defined, so it should for
any such compiler (GCC and Clang).

https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html

> 
> thx
> 
> [...]
> 
> 
> 
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