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67 lines
3.5 KiB
67 lines
3.5 KiB
3 years ago
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http://opensource.franz.com/preamble.html
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Preamble to the Gnu Lesser General Public License
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Copyright (c) 2000 Franz Incorporated, Berkeley, CA 94704
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The concept of the GNU Lesser General Public License version 2.1
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("LGPL") has been adopted to govern the use and distribution of
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above-mentioned application. However, the LGPL uses terminology that
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is more appropriate for a program written in C than one written in
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Lisp. Nevertheless, the LGPL can still be applied to a Lisp program if
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certain clarifications are made. This document details those
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clarifications. Accordingly, the license for the open-source Lisp
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applications consists of this document plus the LGPL. Wherever there
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is a conflict between this document and the LGPL, this document takes
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precedence over the LGPL.
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A "Library" in Lisp is a collection of Lisp functions, data and
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foreign modules. The form of the Library can be Lisp source code (for
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processing by an interpreter) or object code (usually the result of
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compilation of source code or built with some other
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mechanisms). Foreign modules are object code in a form that can be
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linked into a Lisp executable. When we speak of functions we do so in
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the most general way to include, in addition, methods and unnamed
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functions. Lisp "data" is also a general term that includes the data
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structures resulting from defining Lisp classes. A Lisp application
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may include the same set of Lisp objects as does a Library, but this
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does not mean that the application is necessarily a "work based on the
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Library" it contains.
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The Library consists of everything in the distribution file set before
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any modifications are made to the files. If any of the functions or
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classes in the Library are redefined in other files, then those
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redefinitions ARE considered a work based on the Library. If
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additional methods are added to generic functions in the Library,
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those additional methods are NOT considered a work based on the
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Library. If Library classes are subclassed, these subclasses are NOT
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considered a work based on the Library. If the Library is modified to
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explicitly call other functions that are neither part of Lisp itself
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nor an available add-on module to Lisp, then the functions called by
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the modified Library ARE considered a work based on the Library. The
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goal is to ensure that the Library will compile and run without
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getting undefined function errors.
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It is permitted to add proprietary source code to the Library, but it
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must be done in a way such that the Library will still run without
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that proprietary code present. Section 5 of the LGPL distinguishes
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between the case of a library being dynamically linked at runtime and
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one being statically linked at build time. Section 5 of the LGPL
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states that the former results in an executable that is a "work that
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uses the Library." Section 5 of the LGPL states that the latter
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results in one that is a "derivative of the Library", which is
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therefore covered by the LGPL. Since Lisp only offers one choice,
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which is to link the Library into an executable at build time, we
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declare that, for the purpose applying the LGPL to the Library, an
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executable that results from linking a "work that uses the Library"
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with the Library is considered a "work that uses the Library" and is
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therefore NOT covered by the LGPL.
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Because of this declaration, section 6 of LGPL is not applicable to
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the Library. However, in connection with each distribution of this
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executable, you must also deliver, in accordance with the terms and
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conditions of the LGPL, the source code of Library (or your derivative
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thereof) that is incorporated into this executable.
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End of Document
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