AC_DEFUN([AC_REQUIRE_SOCKET], [ AC_SEARCH_LIBS(socket, [xnet bsd socket inet], [have_socket=yes]) if test x"$have_socket" = x"yes"; then AC_SEARCH_LIBS(gethostbyname, [bsd socket inet netinet nsl]) AC_CHECK_MEMBERS([struct linger.l_linger], , , [ #include <sys/types.h> #include <sys/socket.h> ]) else AC_MSG_ERROR([Couldn't find socket functions]) fi ])