On Thu, Dec 24, 2015 at 9:55 AM, Nicolas George <geo...@nsup.org> wrote: > 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.
The prototype checking is already done above via check_mathfunc, which follows your idea. The trouble is that check_ld succeeds with/without GNU_SOURCE, hence the issue reported by Michael. However, the function can only be used if GNU_SOURCE has been defined. > > Regards, > > -- > Nicolas George _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
