1 # hostname.m4 serial 1 (gettext-0.11)
2 dnl Copyright (C) 2001-2002 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 # Prerequisites of the hostname.c program.
8 AC_DEFUN([gt_PREREQ_HOSTNAME],
10 AC_CHECK_HEADERS(arpa/inet.h)
11 AC_CHECK_FUNCS(gethostname gethostbyname inet_ntop)
13 AC_MSG_CHECKING([for IPv6 sockets])
14 AC_CACHE_VAL(gt_cv_socket_ipv6,[
16 #include <sys/types.h>
17 #include <sys/socket.h>
18 #include <netinet/in.h>],
19 [int x = AF_INET6; struct in6_addr y; struct sockaddr_in6 z;],
20 gt_cv_socket_ipv6=yes, gt_cv_socket_ipv6=no)
22 AC_MSG_RESULT($gt_cv_socket_ipv6)
23 if test $gt_cv_socket_ipv6 = yes; then
24 AC_DEFINE(HAVE_IPV6, 1, [Define if <sys/socket.h> defines AF_INET6.])