cc -L"/Users/rob/source/ffmpeg"/libavformat -L"/Users/rob/source/ffmpeg"/libavcodec -L"/Users/rob/source/ffmpeg"/libavutil -Wl,-dynamic,-search_paths_first  -rdynamic -g -o ffmpeg_g ffmpeg.o cmdutils.o -lavformat -lavcodec -lavutil -lz   
i686-apple-darwin8-gcc-4.0.1: unrecognized option '-rdynamic'
/usr/bin/ld: Undefined symbols:
_libgsm_ms_decoder
_libgsm_ms_encoder
collect2: ld returned 1 exit status
make: *** [ffmpeg_g] Error 1