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License | 228 lines | 184 code | 44 blank | 0 comment | 0 complexity | ed506c8c1abf07f9caf7bd288ad387ee MD5 | raw file
  1	Preamble to the Gnu Lesser General Public License 	 
  3 Copyright (c) 2000 Franz Incorporated, Berkeley, CA 94704
  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.
 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.
 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.
 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.
 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.
 65                       Version 3, 29 June 2007
 67 Copyright (C) 2007 Free Software Foundation, Inc. <>
 68 Everyone is permitted to copy and distribute verbatim copies
 69 of this license document, but changing it is not allowed.
 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.
 76  0. Additional Definitions. 
 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.
 82  "The Library" refers to a covered work governed by this License,
 83other than an Application or a Combined Work as defined below.
 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.
 90  A "Combined Work" is a work produced by combining or linking an
 91Application with the Library.  The particular version of the Library
 92with which the Combined Work was made is also called the "Linked
 95  The "Minimal Corresponding Source" for a Combined Work means the
 96Corresponding Source for the Combined Work, excluding any source code
 97for portions of the Combined Work that, considered in isolation, are
 98based on the Application, and not on the Linked Version.
100  The "Corresponding Application Code" for a Combined Work means the
101object code and/or source code for the Application, including any data
102and utility programs needed for reproducing the Combined Work from the
103Application, but excluding the System Libraries of the Combined Work.
105  1. Exception to Section 3 of the GNU GPL.
107  You may convey a covered work under sections 3 and 4 of this License
108without being bound by section 3 of the GNU GPL.
110  2. Conveying Modified Versions.
112  If you modify a copy of the Library, and, in your modifications, a
113facility refers to a function or data to be supplied by an Application
114that uses the facility (other than as an argument passed when the
115facility is invoked), then you may convey a copy of the modified
118   a) under this License, provided that you make a good faith effort to
119   ensure that, in the event an Application does not supply the
120   function or data, the facility still operates, and performs
121   whatever part of its purpose remains meaningful, or
123   b) under the GNU GPL, with none of the additional permissions of
124   this License applicable to that copy.
126  3. Object Code Incorporating Material from Library Header Files.
128  The object code form of an Application may incorporate material from
129a header file that is part of the Library.  You may convey such object
130code under terms of your choice, provided that, if the incorporated
131material is not limited to numerical parameters, data structure
132layouts and accessors, or small macros, inline functions and templates
133(ten or fewer lines in length), you do both of the following:
135   a) Give prominent notice with each copy of the object code that the
136   Library is used in it and that the Library and its use are
137   covered by this License.
139   b) Accompany the object code with a copy of the GNU GPL and this license
140   document.
142  4. Combined Works.
144  You may convey a Combined Work under terms of your choice that,
145taken together, effectively do not restrict modification of the
146portions of the Library contained in the Combined Work and reverse
147engineering for debugging such modifications, if you also do each of
148the following:
150   a) Give prominent notice with each copy of the Combined Work that
151   the Library is used in it and that the Library and its use are
152   covered by this License.
154   b) Accompany the Combined Work with a copy of the GNU GPL and this license
155   document.
157   c) For a Combined Work that displays copyright notices during
158   execution, include the copyright notice for the Library among
159   these notices, as well as a reference directing the user to the
160   copies of the GNU GPL and this license document.
162   d) Do one of the following:
164       0) Convey the Minimal Corresponding Source under the terms of this
165       License, and the Corresponding Application Code in a form
166       suitable for, and under terms that permit, the user to
167       recombine or relink the Application with a modified version of
168       the Linked Version to produce a modified Combined Work, in the
169       manner specified by section 6 of the GNU GPL for conveying
170       Corresponding Source.
172       1) Use a suitable shared library mechanism for linking with the
173       Library.  A suitable mechanism is one that (a) uses at run time
174       a copy of the Library already present on the user's computer
175       system, and (b) will operate properly with a modified version
176       of the Library that is interface-compatible with the Linked
177       Version. 
179   e) Provide Installation Information, but only if you would otherwise
180   be required to provide such information under section 6 of the
181   GNU GPL, and only to the extent that such information is
182   necessary to install and execute a modified version of the
183   Combined Work produced by recombining or relinking the
184   Application with a modified version of the Linked Version. (If
185   you use option 4d0, the Installation Information must accompany
186   the Minimal Corresponding Source and Corresponding Application
187   Code. If you use option 4d1, you must provide the Installation
188   Information in the manner specified by section 6 of the GNU GPL
189   for conveying Corresponding Source.)
191  5. Combined Libraries.
193  You may place library facilities that are a work based on the
194Library side by side in a single library together with other library
195facilities that are not Applications and are not covered by this
196License, and convey such a combined library under terms of your
197choice, if you do both of the following:
199   a) Accompany the combined library with a copy of the same work based
200   on the Library, uncombined with any other library facilities,
201   conveyed under the terms of this License.
203   b) Give prominent notice with the combined library that part of it
204   is a work based on the Library, and explaining where to find the
205   accompanying uncombined form of the same work.
207  6. Revised Versions of the GNU Lesser General Public License.
209  The Free Software Foundation may publish revised and/or new versions
210of the GNU Lesser General Public License from time to time. Such new
211versions will be similar in spirit to the present version, but may
212differ in detail to address new problems or concerns.
214  Each version is given a distinguishing version number. If the
215Library as you received it specifies that a certain numbered version
216of the GNU Lesser General Public License "or any later version"
217applies to it, you have the option of following the terms and
218conditions either of that published version or of any later version
219published by the Free Software Foundation. If the Library as you
220received it does not specify a version number of the GNU Lesser
221General Public License, you may choose any version of the GNU Lesser
222General Public License ever published by the Free Software Foundation.
224  If the Library as you received it specifies that a proxy can decide
225whether future versions of the GNU Lesser General Public License shall
226apply, that proxy's public statement of acceptance of any version is
227permanent authorization for you to choose that version for the