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1 Preamble to the Gnu Lesser General Public License 2 3 Copyright (c) 2000 Franz Incorporated, Berkeley, CA 94704 4 5The concept of the GNU Lesser General Public License version 2.1 6("LGPL") has been adopted to govern the use and distribution of 7above-mentioned application. However, the LGPL uses terminology that 8is more appropriate for a program written in C than one written in 9Lisp. Nevertheless, the LGPL can still be applied to a Lisp program if 10certain clarifications are made. This document details those 11clarifications. Accordingly, the license for the open-source Lisp 12applications consists of this document plus the LGPL. Wherever there 13is a conflict between this document and the LGPL, this document takes 14precedence over the LGPL. 15 16A "Library" in Lisp is a collection of Lisp functions, data and 17foreign modules. The form of the Library can be Lisp source code (for 18processing by an interpreter) or object code (usually the result of 19compilation of source code or built with some other 20mechanisms). Foreign modules are object code in a form that can be 21linked into a Lisp executable. When we speak of functions we do so in 22the most general way to include, in addition, methods and unnamed 23functions. Lisp "data" is also a general term that includes the data 24structures resulting from defining Lisp classes. A Lisp application 25may include the same set of Lisp objects as does a Library, but this 26does not mean that the application is necessarily a "work based on the 27Library" it contains. 28 29The Library consists of everything in the distribution file set before 30any modifications are made to the files. If any of the functions or 31classes in the Library are redefined in other files, then those 32redefinitions ARE considered a work based on the Library. If 33additional methods are added to generic functions in the Library, 34those additional methods are NOT considered a work based on the 35Library. If Library classes are subclassed, these subclasses are NOT 36considered a work based on the Library. If the Library is modified to 37explicitly call other functions that are neither part of Lisp itself 38nor an available add-on module to Lisp, then the functions called by 39the modified Library ARE considered a work based on the Library. The 40goal is to ensure that the Library will compile and run without 41getting undefined function errors. 42 43It is permitted to add proprietary source code to the Library, but it 44must be done in a way such that the Library will still run without 45that proprietary code present. Section 5 of the LGPL distinguishes 46between the case of a library being dynamically linked at runtime and 47one being statically linked at build time. Section 5 of the LGPL 48states that the former results in an executable that is a "work that 49uses the Library." Section 5 of the LGPL states that the latter 50results in one that is a "derivative of the Library", which is 51therefore covered by the LGPL. Since Lisp only offers one choice, 52which is to link the Library into an executable at build time, we 53declare that, for the purpose applying the LGPL to the Library, an 54executable that results from linking a "work that uses the Library" 55with the Library is considered a "work that uses the Library" and is 56therefore NOT covered by the LGPL. 57 58Because of this declaration, section 6 of LGPL is not applicable to 59the Library. However, in connection with each distribution of this 60executable, you must also deliver, in accordance with the terms and 61conditions of the LGPL, the source code of Library (or your derivative 62thereof) that is incorporated into this executable. 63 64 GNU LESSER GENERAL PUBLIC LICENSE 65 Version 3, 29 June 2007 66 67 Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> 68 Everyone is permitted to copy and distribute verbatim copies 69 of this license document, but changing it is not allowed. 70 71 72 This version of the GNU Lesser General Public License incorporates 73the terms and conditions of version 3 of the GNU General Public 74License, supplemented by the additional permissions listed below. 75 76 0. Additional Definitions. 77 78 As used herein, "this License" refers to version 3 of the GNU Lesser 79General Public License, and the "GNU GPL" refers to version 3 of the GNU 80General Public License. 81 82 "The Library" refers to a covered work governed by this License, 83other than an Application or a Combined Work as defined below. 84 85 An "Application" is any work that makes use of an interface provided 86by the Library, but which is not otherwise based on the Library. 87Defining a subclass of a class defined by the Library is deemed a mode 88of using an interface provided by the Library. 89 90 A "Combined Work" is a work produced by combining or linking an 91Application with the Library. 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