CLISP-exception-2.0.txt

Summary:
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation; see file GNU-GPL.
This program 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, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
Note:
This copyright does NOT cover user programs that run in CLISP and third-party packages not part of CLISP, if a) They only reference external symbols in CLISP's public packages that define API also provided by many other Common Lisp implementations (namely the packages COMMON-LISP, COMMON-LISP-USER, KEYWORD, CLOS, GRAY, EXT), i.e. if they don't rely on CLISP internals and would as well run in any other Common Lisp implementation. Or b) They only reference external symbols in CLISP's public packages that define API also provided by many other Common Lisp implementations (namely the packages COMMON-LISP, COMMON-LISP-USER, KEYWORD, CLOS, GRAY, EXT) and some external, not CLISP specific, symbols in third-party packages that are released with source code under a GPL compatible license and that run in a great number of Common Lisp implementations, i.e. if they rely on CLISP internals only to the extent needed for gaining some functionality also available in a great number of Common Lisp implementations. Such user programs are not covered by the term """"derived work"""" used in the GNU GPL. Neither is their compiled code, i.e. the result of compiling them by use of the function COMPILE-FILE. We refer to such user programs as """"independent work"""".
You may copy and distribute memory image files generated by the function SAVEINITMEM, if it was generated only from CLISP and independent work, and provided that you accompany them, in the sense of section 3 of the GNU GPL, with the source code of CLISP - precisely the same CLISP version that was used to build the memory image -, the source or compiled code of the user programs needed to rebuild the memory image (source code for all the parts that are not independent work, see above), and a precise description how to rebuild the memory image from these.
Foreign non-Lisp code that is linked with CLISP or loaded into CLISP through dynamic linking is not exempted from this copyright. I.e. such code, when distributed for use with CLISP, must be distributed under the GPL.