cl65 (and all cc65 binutils) are (C) Copyright 1998-2004 Ullrich von Bassewitz. For usage of the binaries and/or sources the following conditions do apply:
This software is provided 'as-is', without any expressed or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software.
Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions: