autoreconf error: possibly undefine macro: AC_DEFINE

[Carlos Eduardo Rodrigues Diogenes]

Hi,

I'm running autoreconf and I'm getting the following error:

configure.ac:38: error: possibly undefined macro: AC_DEFINE
     If this token and others are legitimate, please use m4_pattern_allow.
     See the Autoconf documentation.

Anyone know why this is ocurring and, in the perfect fashion, how to 
solve it?

Here is the configure.ac file that I have, a peace of it:


dnl  Copyright 2005 Red Hat, Inc.
dnl
dnl  Permission to use, copy, modify, distribute, and sell this software 
and its
dnl  documentation for any purpose is hereby granted without fee, 
provided that
dnl  the above copyright notice appear in all copies and that both that
dnl  copyright notice and this permission notice appear in supporting
dnl  documentation, and that the name of Red Hat not be used in
dnl  advertising or publicity pertaining to distribution of the software 
without
dnl  specific, written prior permission.  Red Hat makes no
dnl  representations about the suitability of this software for any 
purpose.  It
dnl  is provided "as is" without express or implied warranty.
dnl
dnl  RED HAT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
dnl  INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
dnl  EVENT SHALL RED HAT BE LIABLE FOR ANY SPECIAL, INDIRECT OR
dnl  CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS 
OF USE,
dnl  DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
dnl  TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
dnl  PERFORMANCE OF THIS SOFTWARE.
dnl
dnl Process this file with autoconf to create configure.

AC_PREREQ([2.57])
AC_INIT(xdm,[0.99.1], 
[https://bugs.freedesktop.org/enter_bug.cgi?product=xorg],xdm)
AM_INIT_AUTOMAKE([dist-bzip2])
AM_MAINTAINER_MODE

AM_CONFIG_HEADER(config.h)

AC_PROG_CC
AC_PROG_INSTALL
AC_CANONICAL_HOST

XORG_PROG_RAWCPP

AC_FUNC_FORK
AC_CHECK_FUNC(mkstemp, AC_DEFINE(HAS_MKSTEMP,1,            <== the error 
occur here
   [Define to 1 if you have the 'mkstemp' function.]))
AC_CHECK_FUNC(getifaddrs, AC_DEFINE(HAS_GETIFADDRS,1,
   [Define to 1 if you have the 'getifaddrs' function.]))
AC_CHECK_FUNC(getspnam, AC_DEFINE(USESHADOW,1,
   [Define to 1 if you have the shadow password functions.]))

Thanks,
Carlos.