1# hostname.m4 serial 1 (gettext-0.11)
2dnl Copyright (C) 2001-2002 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
7# Prerequisites of the hostname.c program.
8AC_DEFUN([gt_PREREQ_HOSTNAME],
9[
10  AC_CHECK_HEADERS(arpa/inet.h)
11  AC_CHECK_FUNCS(gethostname gethostbyname inet_ntop)
12
13  AC_MSG_CHECKING([for IPv6 sockets])
14  AC_CACHE_VAL(gt_cv_socket_ipv6,[
15    AC_TRY_COMPILE([
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)
21  ])
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.])
25  fi
26])
27