PKG_CONFIG_PATH=/home/david/built_ffmpeg/lib/pkgconfig ./configure
--enable-cross-compile --cross-prefix=${CCPREFIX}  --prefix=/home/david/built_ffmpeg
--arch=armel --target-os=linux --enable-gpl --enable-libx264 --enable-nonfree --enable-libmp3lame --enable-libfdk-aac
--extra-cflags="-I/home/david/built_ffmpeg/include" --extra-ldflags="-L/home/david/built_ffmpeg/lib" --extra-libs=-ldl
--disable-debug  --disable-shared --disable-ffplay --disable-ffserver