2 dnl Copyright (C) 2004, 2006, 2009-2020 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 Test for some common socket protocol families (PF_INET, PF_INET6, ...)
8 dnl and some common address families (AF_INET, AF_INET6, ...).
9 dnl This test assumes that a system supports an address family if and only if
10 dnl it supports the corresponding protocol family.
12 dnl From Bruno Haible.
14 AC_DEFUN([gl_SOCKET_FAMILIES],
16 AC_REQUIRE([gl_HEADER_SYS_SOCKET])
17 AC_CHECK_HEADERS_ONCE([netinet/in.h])
19 AC_CACHE_CHECK([for IPv4 sockets],
21 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
22 #ifdef HAVE_SYS_SOCKET_H
23 #include <sys/socket.h>
25 #ifdef HAVE_NETINET_IN_H
26 #include <netinet/in.h>
28 #ifdef HAVE_WINSOCK2_H
31 [[int x = AF_INET; struct in_addr y; struct sockaddr_in z;
32 if (&x && &y && &z) return 0;]])],
33 gl_cv_socket_ipv4=yes, gl_cv_socket_ipv4=no)])
34 if test $gl_cv_socket_ipv4 = yes; then
35 AC_DEFINE([HAVE_IPV4], [1], [Define to 1 if <sys/socket.h> defines AF_INET.])
38 AC_CACHE_CHECK([for IPv6 sockets],
40 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
41 #ifdef HAVE_SYS_SOCKET_H
42 #include <sys/socket.h>
44 #ifdef HAVE_NETINET_IN_H
45 #include <netinet/in.h>
47 #ifdef HAVE_WINSOCK2_H
50 #ifdef HAVE_WS2TCPIP_H
53 [[int x = AF_INET6; struct in6_addr y; struct sockaddr_in6 z;
54 if (&x && &y && &z) return 0;]])],
55 gl_cv_socket_ipv6=yes, gl_cv_socket_ipv6=no)])
56 if test $gl_cv_socket_ipv6 = yes; then
57 AC_DEFINE([HAVE_IPV6], [1], [Define to 1 if <sys/socket.h> defines AF_INET6.])
61 AC_DEFUN([gl_SOCKET_FAMILY_UNIX],
63 AC_REQUIRE([gl_HEADER_SYS_SOCKET])
64 AC_CHECK_HEADERS_ONCE([sys/un.h])
66 AC_CACHE_CHECK([for UNIX domain sockets],
68 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
69 #ifdef HAVE_SYS_SOCKET_H
70 #include <sys/socket.h>
75 #ifdef HAVE_WINSOCK2_H
78 [[int x = AF_UNIX; struct sockaddr_un y;
79 if (&x && &y) return 0;]])],
80 gl_cv_socket_unix=yes, gl_cv_socket_unix=no)])
81 if test $gl_cv_socket_unix = yes; then
82 AC_DEFINE([HAVE_UNIXSOCKET], [1], [Define to 1 if <sys/socket.h> defines AF_UNIX.])