banshee-pta is derived from David Gay's Region Compiler and the GNU C 
Compiler. 

It is thus
   Copyright (C) 1987, 88, 89, 92-7, 1998 Free Software Foundation, Inc.
and
   Copyright (C) 2000-2001 The Regents of the University of California.

banshee-pta 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.

banshee-pta 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 banshee-pta; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
