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