aclocal.m4

this is sample about DHCP-agent

# generated automatically by aclocal 1.7.5 -*- Autoconf -*-

# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002
# Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
# PARTICULAR PURPOSE.

dnl pcap.h winds up in wierd places.

AC_DEFUN(AC_WF_CHECK_PCAP_HEADER_DIR,
          [AC_MSG_CHECKING(for pcap header directory)
		  ac_pcap_header_dir="none"
		  for dir in $prefix/include /include /usr/include /usr/local/include /include/pcap /usr/include/pcap /usr/local/include/pcap
		  do
		    if test -f "$dir/pcap.h" ; then
			  ac_pcap_header_dir=$dir
		    fi
	  done
		  
	  if test $ac_pcap_header_dir = "none" ; then
          AC_MSG_ERROR([
I cannot find the pcap header file anywhere. Perhaps you did not install 
the pcap package, or you did not install its development header files.], 1)
	  fi
	  
	  AC_MSG_RESULT($ac_pcap_header_dir)])

dnl on some broken systems /usr/local/lib is not in the linker's
dnl default path. so we'll sift about.

AC_DEFUN(AC_WF_CHECK_PCAP_LIB_DIR,
          [AC_MSG_CHECKING(for pcap library directory)
		  ac_pcap_lib_dir="none"
		  for dir in $prefix/lib /lib /usr/lib /usr/local/lib
		  do
		    if test -f "$dir/libpcap.a" ; then
			  ac_pcap_lib_dir=$dir
		    fi
	  done
		  
	  if test $ac_pcap_lib_dir = "none" ; then
                    AC_MSG_ERROR([
I cannot find the pcap library anywhere. Perhaps you did not install
the pcap package, or you did not install its development header files.], 1)
	  fi

	  AC_MSG_RESULT($ac_pcap_lib_dir)])

AC_DEFUN(AC_WF_TRY_PRI_MACROS,
[AC_MSG_CHECKING(for stdint conversion macros)
 AC_TRY_COMPILE([#include <stdio.h>
                 #include <stdlib.h>
                 #include <inttypes.h>
], [uint32_t t=1; printf("%"PRIu32, t);], 
                        [AC_MSG_RESULT(found)
                        have_primacros="yes"],
                        AC_MSG_RESULT(not found))])

AC_DEFUN(AC_WF_CHECK_KILL_SIGNAL_DETECT,
[AC_MSG_CHECKING(if kill(0, pid) can be used to detect a process)
AC_TRY_RUN([
/* Check the behaviour of kill(pid, 0).
 * We expect it to return 0 for an existing process that we can
 * signal, and < 0 otherwise.
 */

#include <stdlib.h> 
#include <stdio.h>

#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
#include <unistd.h>

int main(int argc, char *argv[])
{
    pid_t child_pid;
    int kill_existing, kill_nonexisting;
    int wait_status;

    child_pid = fork();

    if (child_pid == -1) {
        perror("fork");
        exit(1);
    } else if (child_pid == 0) {
	(void)sleep(3600);
        _exit(0);
    }

    kill_existing = kill(child_pid, 0);

    (void)kill(child_pid, SIGTERM);
    (void)wait(&wait_status);

    kill_nonexisting = kill(child_pid, 0);

    if (kill_existing == 0 && kill_nonexisting < 0)
        exit(0); /* the behaviour we expect */
    else
        fprintf(stderr, "error: returned (%d,%d); expecting (0,-1)\n",
                kill_existing, kill_nonexisting);

    exit(1);
}
], [AC_DEFINE(KILL_SIGNAL_DETECT, 1, [kill(pid, 0) can be used to detect a process we can signal]) AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no)])])


AC_DEFUN(AC_WF_CHECK_BPF_IMMEDIATE,
[AC_MSG_CHECKING(for bpf immediate ioctl)
 AC_TRY_COMPILE([#include <stdio.h>
                 #include <stdlib.h>
                 #include <sys/types.h>
                 #include <sys/time.h>
                 #include <sys/ioctl.h>
                 #include <net/bpf.h>
                 #include <net/bpfdesc.h>
], [    ioctl(0, BIOCIMMEDIATE, NULL);], 
                        [AC_MSG_RESULT(found)
                        AC_DEFINE(HAVE_BPF_IMMEDIATE, 1, [have BPF_IMMEDIATE])],
                        AC_MSG_RESULT(not found))])

# Do all the work for Automake.                            -*- Autoconf -*-

# This macro actually does too much some checks are only needed if
# your package does certain things.  But this isn't really a big deal.

# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
# Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.

# serial 10

AC_PREREQ([2.54])

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# call (pre autoconf-2.50), which is being phased out.  PACKAGE
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AC_DEFUN([AM_INIT_AUTOMAKE],
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# test to see if srcdir already configured
if test "`cd $srcdir && pwd`" != "`pwd`" &&
   test -f $srcdir/config.status; then
  AC_MSG_ERROR([source directory already configured; run "make distclean" there first])
fi

# test whether we have cygpath
if test -z "$CYGPATH_W"; then
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fi
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m4_ifval([$2],
[m4_ifval([$3], [_AM_SET_OPTION([no-define])])dnl
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_AM_IF_OPTION([no-define],,
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# Some tools Automake needs.
AC_REQUIRE([AM_SANITY_CHECK])dnl
AC_REQUIRE([AC_ARG_PROGRAM])dnl
AM_MISSING_PROG(ACLOCAL, aclocal-${am__api_version})
AM_MISSING_PROG(AUTOCONF, autoconf)
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AM_MISSING_PROG(MAKEINFO, makeinfo)
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done
echo "timestamp for $1" >`AS_DIRNAME([$1])`/stamp-h[]$_am_stamp_count])

# Copyright 2002  Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA

# AM_AUTOMAKE_VERSION(VERSION)
# ----------------------------
# Automake X.Y traces this macro to ensure aclocal.m4 has been
# generated from the m4 files accompanying Automake X.Y.
AC_DEFUN([AM_AUTOMAKE_VERSION],[am__api_version="1.7"])

# AM_SET_CURRENT_AUTOMAKE_VERSION
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# Helper functions for option handling.                    -*- Autoconf -*-

# Copyright 2001, 2002  Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.

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#
# Check to make sure that the build environment is sane.
#

# Copyright 1996, 1997, 2000, 2001 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.

# serial 3

# AM_SANITY_CHECK
# ---------------
AC_DEFUN([AM_SANITY_CHECK],
[AC_MSG_CHECKING([whether build environment is sane])
# Just in case
sleep 1
echo timestamp > conftest.file
# Do `set' in a subshell so we don't clobber the current shell's
# arguments.  Must try -L first in case configure is actually a
# symlink; some systems play weird games with the mod time of symlinks
# (eg FreeBSD returns the mod time of the symlink's containing
# directory).
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   set X `ls -Lt $srcdir/configure conftest.file 2> /dev/null`
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   if test "$[*]" != "X $srcdir/configure conftest.file" \
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   )
then
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   :
else
   AC_MSG_ERROR([newly created file is older than distributed files!
Check your system clock])
fi
AC_MSG_RESULT(yes)])

#  -*- Autoconf -*-


# Copyright 1997, 1999, 2000, 2001 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the