1 # sys_socket_h.m4 serial 2
2 dnl Copyright (C) 2005, 2006 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 dnl From Simon Josefsson.
9 AC_DEFUN([gl_HEADER_SYS_SOCKET],
11 AC_CHECK_HEADERS_ONCE([sys/socket.h])
12 if test $ac_cv_header_sys_socket_h = yes; then
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'
22 AC_SUBST(SYS_SOCKET_H)