COPYING

Copyright (c) 1993-2003 Richard Kelsey and Jonathan Rees
Copyright (c) 1994-2003 by Olin Shivers and Brian D. Carlstrom.
Copyright (c) 1999-2003 by Martin Gasbichler.
Copyright (c) 2001-2003 by Michael Sperber.
Copyright (c) 2009-2015 by Roderic Morris.

All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
3. The name of the authors may not be used to endorse or promote products
   derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Distributing Autoconf Output
****************************

[excerpt from autoconf documentation]

   The configuration scripts that Autoconf produces are covered by the
GNU General Public License.  This is because they consist almost
entirely of parts of Autoconf itself, rearranged somewhat, and Autoconf
is distributed under the terms of the GPL.  As applied to Autoconf, the
GPL just means that you need to distribute `configure.in' along with
`configure'.

   Programs that use Autoconf scripts to configure themselves do not
automatically come under the GPL.  Distributing an Autoconf
configuration script as part of a program is considered to be *mere
aggregation* of that work with the Autoconf script.  Such programs are
not derivative works based on Autoconf; only their configuration scripts
are.  We still encourage software authors to distribute their work under
terms like those of the GPL, but doing so is not required to use
Autoconf.