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+-*- text -*-
+
+Autoconf
+
+Autoconf is an extensible package of M4 macros that produce shell
+scripts to automatically configure software source code packages.
+These scripts can adapt the packages to many kinds of UNIX-like
+systems without manual user intervention.  Autoconf creates a
+configuration script for a package from a template file that lists the
+operating system features that the package can use, in the form of M4
+macro calls.
+
+Producing configuration scripts using Autoconf requires GNU M4 and
+Perl.  You should install GNU M4 (version 1.4.6 or later is required;
+1.4.14 or later is recommended) and Perl (5.005_03 or later) before
+configuring Autoconf, so that Autoconf's configure script can find
+them.  The configuration scripts produced by Autoconf are
+self-contained, so their users do not need to have Autoconf (or GNU
+M4, Perl, etc.).
+
+You can get GNU M4 here:
+
+ftp://ftp.gnu.org/gnu/m4/
+
+The file INSTALL should be distributed with packages that use
+Autoconf-generated configure scripts and Makefiles that conform to the
+GNU coding standards.  The package's README can just give an overview
+of the package, where to report bugs, and a pointer to INSTALL for
+instructions on compilation and installation.  This removes the need
+to maintain many similar sets of installation instructions.
+
+Be sure to read BUGS and INSTALL.
+
+Mail suggestions to autoconf@gnu.org, report bugs to
+bug-autoconf@gnu.org, and submit patches to autoconf-patches@gnu.org.
+All changes can be tracked at the read-only autoconf-commit@gnu.org.
+Always include the Autoconf version number, which you can get by
+running `autoconf --version'.  Archives of bug-autoconf@gnu.org can be
+found in <http://lists.gnu.org/archive/html/bug-autoconf/>, and
+similarly for the other mailing lists.
+
+Licensing
+
+Autoconf is released under the General Public License version 3 (GPLv3+).
+Additionally, Autoconf includes a licensing exception in some of its
+source files; see the respective copyright notices for how your
+project is impacted by including scripts generated by Autoconf, and the
+COPYING.EXCEPTION file for the exception in terms of the Additional
+Permissions as described in section 7 of GPLv3.
+
+For more licensing information, see
+<http://www.gnu.org/licenses/gpl-faq.html> and
+<http://www.gnu.org/licenses/exceptions.html>.
+
+For any copyright year range specified as YYYY-ZZZZ in this package
+note that the range specifies every single year in that closed interval.
+
+-----
+
+Copyright (C) 1992-1994, 1998, 2000-2011 Free Software Foundation,
+Inc.
+
+Copying and distribution of this file, with or without modification,
+are permitted in any medium without royalty provided the copyright
+notice and this notice are preserved.  This file is offered as-is,
+without warranty of any kind.