1# sys_socket_h.m4 serial 2 2dnl Copyright (C) 2005, 2006 Free Software Foundation, Inc. 3dnl This file is free software; the Free Software Foundation 4dnl gives unlimited permission to copy and/or distribute it, 5dnl with or without modifications, as long as this notice is preserved. 6 7dnl From Simon Josefsson. 8 9AC_DEFUN([gl_HEADER_SYS_SOCKET], 10[ 11 AC_CHECK_HEADERS_ONCE([sys/socket.h]) 12 if test $ac_cv_header_sys_socket_h = yes; then 13 SYS_SOCKET_H='' 14 else 15 dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make 16 dnl the check for those headers unconditional; yet cygwin reports 17 dnl that the headers are present but cannot be compiled (since on 18 dnl cygwin, all socket information should come from sys/socket.h). 19 AC_CHECK_HEADERS([winsock2.h ws2tcpip.h]) 20 SYS_SOCKET_H='sys/socket.h' 21 fi 22 AC_SUBST(SYS_SOCKET_H) 23]) 24