dyld: Symbol not found: _clock_gettime

[alexeyvasilyev]

ISSUE:
ffmpeg compiled against iOS 10 SDK (XCode 8) will produce crash while accessing any RTSP source if it is running on iOS 9.x with the following error:
dyld: Symbol not found: _clock_gettime

The problem is that iOS 10 has clock_gettime function, but iOS 9 does not have.

FIX:
Right after configure put this line

sed -i -- 's/HAVE_CLOCK_GETTIME 1/HAVE_CLOCK_GETTIME 0/g' config.h

[kewlbear]

Thanks for sharing!