Comment 4 for bug 94720

Found more license info, snippet from README:

» This directory contains the source distribution for the University of Melbourne
» Mercury compiler, version 0.13.1.
»
» The Mercury implementation is free software, but it is Copyright
» (C) 1993-2006 The University of Melbourne. It is distributed
» under the terms of the GNU General Public License. See the file
» COPYING for copying permission.
»
» The Mercury library and runtime (the files in the library and
» runtime subdirectories) are distributed under the terms of the
» GNU Library General Public License. See the file COPYING.LIB for
» copying permissions for those files.
»
» If those licencing arrangements are not satisfactory, please
» contact us! We are willing to offer alternative arrangements,
» if the need should arise.
»
» The subdirectory `boehm_gc' contains a slightly modified copy of
» version 6.5 of the conservative garbage collector distributed
» by Hans Boehm:
»
» Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
» Copyright (c) 1991-1995 by Xerox Corporation. All rights reserved.
» Copyright (c) 1996-1999 by Silicon Graphics. All rights reserved.
» Copyright (c) 1999-2001 by Hewlett-Packard. All rights reserved.
»
» THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY
» EXPRESSED OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
»
» Permission is hereby granted to use or copy this program for any
» purpose, provided the above notices are retained on all copies.
» Permission to modify the code and to distribute modified code is
» granted, provided the above notices are retained, and a notice
» that the code was modified is included with the above copyright
» notice.
»
» A few files (config.guess, config.sub) are derived from code that is
» copyright by the Free Software Foundation, Inc, and are distributed
» under the GNU General Public License version 2.
»
» The program `texi2html' in the `doc' directory is copyright by CERN
» and is distributed under the GNU General Public
» License version 2:
»
» This program is the intellectual property of the European
» Laboratory for Particle Physics (known as CERN). No guarantee
» whatsoever is provided by CERN. No liability whatsoever is
» accepted for any loss or damage of any kind resulting from any
» defect or inaccuracy in this information or code.
»
» The files in the `samples' directory are either public domain, or
» distributed under the GNU General Public License.
»

------------------- The next text applies do a different source package, which we should not want to package, but stays here for reference -------------------

» Some of the files in the `extras' subdirectory (which is now distributed
» separately in the `mercury-extras' package) have fairly restrictive
» copyright licences:
»
» The `Togl' library in extras/graphics/mtogl/togl.* is copyright by
» Brian Paul and Ben Bederson; see the file
» extras/graphics/mtogl/LICENSE.TOGL.
»
» The Tk files in extras/graphics/mtogl/tk.* are copyright
» by the Regents of the University of California,
» Sun Microsystems, Inc., and other parties.
» See the file extras/graphics/mtogl/LICENSE.TK.
»
» THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED OR IMPLIED. ANY USE IS AT YOUR OWN RISK. See the file COPYING.

I will attempt to seek legal advice towards packaging this program (mercury, NOT mercury-extras), when I've the time.