make -C libavutil   all
make[1]: Entering directory `/home/tdn/wc/ffmpeg/libavutil'
make[1]: Nothing to be done for `all'.
make[1]: Leaving directory `/home/tdn/wc/ffmpeg/libavutil'
make -C libavcodec  all
make[1]: Entering directory `/home/tdn/wc/ffmpeg/libavcodec'
make[1]: Nothing to be done for `all'.
make[1]: Leaving directory `/home/tdn/wc/ffmpeg/libavcodec'
make -C libavformat all
make[1]: Entering directory `/home/tdn/wc/ffmpeg/libavformat'
make[1]: Nothing to be done for `all'.
make[1]: Leaving directory `/home/tdn/wc/ffmpeg/libavformat'
make -C libpostproc all
make[1]: Entering directory `/home/tdn/wc/ffmpeg/libpostproc'
make[1]: Nothing to be done for `all'.
make[1]: Leaving directory `/home/tdn/wc/ffmpeg/libpostproc'
make -C vhook all
make[1]: Entering directory `/home/tdn/wc/ffmpeg/vhook'
make[1]: Nothing to be done for `all'.
make[1]: Leaving directory `/home/tdn/wc/ffmpeg/vhook'
make -C doc all
make[1]: Entering directory `/home/tdn/wc/ffmpeg/doc'
make[1]: Nothing to be done for `all'.
make[1]: Leaving directory `/home/tdn/wc/ffmpeg/doc'
gcc -L"/home/tdn/wc/ffmpeg"/libavformat -L"/home/tdn/wc/ffmpeg"/libavcodec -L"/home/tdn/wc/ffmpeg"/libavutil -Wl,--warn-common  -pthread -rdynamic -export-dynamic -Wl,--as-needed -Wl,-rpath-link,"/home/tdn/wc/ffmpeg"/libavcodec -Wl,-rpath-link,"/home/tdn/wc/ffmpeg"/libavformat -Wl,-rpath-link,"/home/tdn/wc/ffmpeg"/libavutil -g -o ffmpeg_g ffmpeg.o cmdutils.o -lavformat -lavcodec -lavutil -lm -lz -la52 -ldts -lm -lgsm -lmp3lame -lm -ltheora -logg -lvorbis -lvorbisenc -logg -logg -lxvidcore -lx264 -ldc1394_control -lraw1394 -lfaac -lfaad -ldl
/home/tdn/wc/ffmpeg/libavcodec/libavcodec.a(if_rom.o): warning: definition of `dhf' overriding common
/home/tdn/wc/ffmpeg/libavcodec/libavcodec.a(enc_if.o): warning: common is here
/home/tdn/wc/ffmpeg/libavcodec/libavcodec.a(imgresample.o): In function `sws_scale':
/home/tdn/wc/ffmpeg/libavcodec/imgresample.c:795: undefined reference to `img_convert'
/home/tdn/wc/ffmpeg/libavcodec/imgresample.c:756: undefined reference to `img_convert'
collect2: ld returned 1 exit status
make: *** [ffmpeg_g] Error 1