2 dnl Copyright (C) 2004 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_MSG_CHECKING(for IPv4 sockets)
17 AC_CACHE_VAL(gl_cv_socket_ipv4,
18 [AC_TRY_COMPILE([#include <sys/types.h>
19 #include <sys/socket.h>
20 #include <netinet/in.h>],
21 [int x = AF_INET; struct in_addr y; struct sockaddr_in z;],
22 gl_cv_socket_ipv4=yes, gl_cv_socket_ipv4=no)])
23 AC_MSG_RESULT($gl_cv_socket_ipv4)
24 if test $gl_cv_socket_ipv4 = yes; then
25 AC_DEFINE(HAVE_IPV4, 1, [Define to 1 if <sys/socket.h> defines AF_INET.])
28 AC_MSG_CHECKING(for IPv6 sockets)
29 AC_CACHE_VAL(gl_cv_socket_ipv6,
30 [AC_TRY_COMPILE([#include <sys/types.h>
31 #include <sys/socket.h>
32 #include <netinet/in.h>],
33 [int x = AF_INET6; struct in6_addr y; struct sockaddr_in6 z;],
34 gl_cv_socket_ipv6=yes, gl_cv_socket_ipv6=no)])
35 AC_MSG_RESULT($gl_cv_socket_ipv6)
36 if test $gl_cv_socket_ipv6 = yes; then
37 AC_DEFINE(HAVE_IPV6, 1, [Define to 1 if <sys/socket.h> defines AF_INET6.])