.so.0: undefined reference to `av_log@LIBAVUTIL_49'
/usr/lib/gcc/i486-linux-gnu/4.4.3/../../../../lib/libhighgui.so: undefined reference to `avpicture_fill@LIBAVCODEC_52'
/usr/lib/gcc/i486-linux-gnu/4.4.3/../../../../lib/libhighgui.so: undefined reference to `av_free@LIBAVUTIL_49'
/usr/lib/gcc/i486-linux-gnu/4.4.3/../../../../lib/libhighgui.so: undefined reference to `av_write_trailer@LIBAVFORMAT_52'
/usr/lib/gcc/i486-linux-gnu/4.4.3/../../../../lib/libhighgui.so: undefined reference to `av_sub_q@LIBAVUTIL_49'
/usr/lib/gcc/i486-linux-gnu/4.4.3/../../../../lib/libhighgui.so: undefined reference to `av_alloc_format_context@LIBAVFORMAT_52'
/usr/lib/gcc/i486-linux-gnu/4.4.3/../../../../lib/libhighgui.so: undefined reference to `avcodec_close@LIBAVCODEC_52'
/usr/lib/gcc/i486-linux-gnu/4.4.3/../../../../lib/libhighgui.so: undefined reference to `av_guess_codec@LIBAVFORMAT_52'
/usr/lib/gcc/i486-linux-gnu/4.4.3/../../../../lib/libhighgui.so: undefined reference to `url_fopen@LIBAVFORMAT_52'
/usr/lib/gcc/i486-linux-gnu/4.4.3/../../../../lib/libhighgui.so: undefined reference to `av_new_stream@LIBAVFORMAT_52'
/usr/lib/libswscale.so.0: undefined reference to `av_mallocz@LIBAVUTIL_49'
/usr/lib/gcc/i486-linux-gnu/4.4.3/../../../../lib/libhighgui.so: undefined reference to `av_seek_frame@LIBAVFORMAT_52'
/usr/lib/gcc/i486-linux-gnu/4.4.3/../../../../lib/libhighgui.so: undefined reference to `av_init_packet@LIBAVFORMAT_52'
collect2: ld returned 1 exit status
make[2]: *** [qt-facetrainer] Error 1
make[1]: *** [CMakeFiles/qt-facetrainer.dir/all] Error 2
make: *** [all] Error 2
sam@subuntu:~/pam-face-authentication-0.3/build$