When configured with --disable-network, mplayer fails to link (tested on MacOS 10.6.2). Link error is: Undefined symbols: "_closesocket", referenced from: _tcp_close in libavformat.a(tcp.o) _tcp_open in libavformat.a(tcp.o) _tcp_open in libavformat.a(tcp.o) _udp_close in libavformat.a(udp.o) _udp_open in libavformat.a(udp.o) "_ff_socket_nonblock", referenced from: _tcp_open in libavformat.a(tcp.o) _udp_open in libavformat.a(udp.o) ld: symbol(s) not found collect2: ld returned 1 exit status make: *** [mplayer] Error 1 Disabling libavformat network protocols fixes the build: ./configure --disable-network --disable-protocol=udp --disable-protocol=tcp --disable-protocol=rtp Andrew