Mine

gcc -dynamiclib -Wl,-single_module -Wl,-install_name,/usr/local/lib/libswscale.dylib,-current_version,51.1.0,-compatibility_version,51.1.0 -Wl,-read_only_relocs,suppress -Wl,-dynamic,-search_paths_first  -L/opt/local/lib -o libswscale.0.dylib rgb2rgb.o swscale.o yuv2rgb.o -L"/Users/rob/source/ffmpeg"/libavutil -lavutil -lz -lm -lfaac -lfaad -lmp3lame -lm -ltheora -logg -lvorbisenc -lvorbis -logg   
ld: absolute addressing (perhaps -mdynamic-no-pic) used in _rgb24tobgr24_MMX from rgb2rgb.o not allowed in slidable image
collect2: ld returned 1 exit status
make[1]: *** [libswscale.0.dylib] Error 1