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# hostname.m4 serial 1 (gettext-0.11)
dnl Copyright (C) 2001-2002, 2015-2016 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
# Prerequisites of the hostname.c program.
AC_DEFUN([gt_PREREQ_HOSTNAME],
[
AC_CHECK_HEADERS(arpa/inet.h)
AC_CHECK_FUNCS(gethostname gethostbyname inet_ntop)
AC_MSG_CHECKING([for IPv6 sockets])
AC_CACHE_VAL(gt_cv_socket_ipv6,[
AC_TRY_COMPILE([
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>],
[int x = AF_INET6; struct in6_addr y; struct sockaddr_in6 z;],
gt_cv_socket_ipv6=yes, gt_cv_socket_ipv6=no)
])
AC_MSG_RESULT($gt_cv_socket_ipv6)
if test $gt_cv_socket_ipv6 = yes; then
AC_DEFINE(HAVE_IPV6, 1, [Define if <sys/socket.h> defines AF_INET6.])
fi
])
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