[FFmpeg-devel] [PATCH 2/2] Use gcc/clang builtins for av_sat_(add|sub)_64_c if available.

[James Almer]

On 5/1/2020 4:50 PM, Dale Curtis wrote:
> On Fri, May 1, 2020 at 12:37 PM Carl Eugen Hoyos <ceffmpeg at gmail.com> wrote:
> 
>>>
>>> So ICC on Linux defines __GNUC__ >= 5 yet doesn't support these builtins?
>>
>> No, but yes, this is the effect.
>>
> 
> Does this patch work instead on the ICC compiler? GCC 4.2+ have support for
> __has_builtin() which shouldn't be masqueraded by the ICC.

Just make the check

(AV_GCC_VERSION_AT_LEAST(5,1) || defined(__clang__)) &&
!defined(__INTEL_COMPILER)

And yes, make it 5.1 since that's the first release. 5.0 was the
in-development version.

> 
> - dale
> 
> 
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