git clone 'https://github.com/e-user/cl-m4.git'
cl-m4 is a complete M4 implementation from scratch targeted at GNU M4 compatibility.
cl-m4 is completely written in Common Lisp and licensed under the GPLv3+. Please see the file COPYING in the top-level directory of the distribution tarball or see the link at  if you didn't receive a copy along with this file.
Since distribution in binary form requires static linking of Common Lisp libraries, distribution must include the file CREDITS also found in mentioned top-level directory to respect copyright of the respective holders.
Please see file INSTALL.
Homepage: http://www.cliki.net/cl-m4 Hacking: http://github.com/e-user/cl-m4
Copyright (C) 2009, 2010 Alexander Kahl <email@example.com> This file is part of cl-m4. cl-m4 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 3 of the License, or (at your option) any later version.
cl-m4 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, see http://www.gnu.org/licenses/.