[FFmpeg-devel] [PATCH] configure: add check_feature_test_macro for exp10, exp10f

[Nicolas George]

Le quartidi 4 nivôse, an CCXXIV, Ganesh Ajjanagadde a écrit :
> exp10 and exp10f need _GNU_SOURCE. check_mathfunc only tests if the
> function is available, and not whether it is locked or unlocked via
> _GNU_SOURCE.
> 
> This adds some support to configure to test for _GNU_SOURCE and
> accordingly report the existence of exp10, exp10f.

I do not think this is a good solution. IMHO, the correct way would be to
detect if the function has a prototype. It could probably be done by trying
to cast it to int: if it is not declared, it will fail.

Regards,

-- 
  Nicolas George
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