1 # sys_socket_h.m4 serial 3
2 dnl Copyright (C) 2005, 2006, 2007 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_CACHE_CHECK([whether <sys/socket.h> is self-contained],
12 [gl_cv_header_sys_socket_h_selfcontained],
14 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <sys/socket.h>], [])],
15 [gl_cv_header_sys_socket_h_selfcontained=yes],
16 [gl_cv_header_sys_socket_h_selfcontained=no])
18 if test $gl_cv_header_sys_socket_h_selfcontained = yes; then
21 SYS_SOCKET_H='sys/socket.h'
23 AC_CHECK_HEADERS([sys/socket.h])
24 gl_ABSOLUTE_HEADER([sys/socket.h])
25 ABSOLUTE_SYS_SOCKET_H=\"$gl_cv_absolute_sys_socket_h\"
26 AC_SUBST([ABSOLUTE_SYS_SOCKET_H])
27 if test $ac_cv_header_sys_socket_h = yes; then
33 dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
34 dnl the check for those headers unconditional; yet cygwin reports
35 dnl that the headers are present but cannot be compiled (since on
36 dnl cygwin, all socket information should come from sys/socket.h).
37 AC_CHECK_HEADERS([winsock2.h ws2tcpip.h])
38 if test $ac_cv_header_winsock2_h = yes; then
43 if test $ac_cv_header_ws2tcpip_h = yes; then
49 AC_SUBST([HAVE_SYS_SOCKET_H])
50 AC_SUBST([HAVE_WINSOCK2_H])
51 AC_SUBST([HAVE_WS2TCPIP_H])
53 AC_SUBST([SYS_SOCKET_H])