This also lists the objects from those two libraries as internal (by adding the ff_ prefix) so that they can then be hidden via linker scripts. (cherry picked from commit c6610a216e)
c6610a216e
Originally committed as revision 23289 to svn://svn.ffmpeg.org/ffmpeg/trunk
needing an external MD5 command. Originally committed as revision 23257 to svn://svn.ffmpeg.org/ffmpeg/trunk