gistfile1.sh

    if ${cross_prefix}pkg-config --exists libavformat libavcodec libswscale 2>/dev/null; then
        LAVF_LIBS="$LAVF_LIBS $(${cross_prefix}pkg-config --libs libavformat libavcodec libavutil libswscale)"
        LAVF_CFLAGS="$LAVF_CFLAGS $(${cross_prefix}pkg-config --cflags libavformat libavcodec libavutil libswscale)"
    fi
    if [ -z "$LAVF_LIBS" -a -z "$LAVF_CFLAGS" ]; then
        LAVF_LIBS="-lavformat"
        for lib in -lpostproc -lavcodec -lavcore -lswscale -lavutil -lm -lz -lbz2 $libpthread -lavifil32; do
            cc_check "" $lib && LAVF_LIBS="$LAVF_LIBS $lib"
        done
    fi
    LAVF_LIBS="-L. $LAVF_LIBS"