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Barco - RHDM-2301 - User manual 237
Addendum
one; be sure to read it in full, and don't assume that anything in it is the same as in the ordinary
license.
The reason we have a separate public license for some libraries is that they blur the distinction we
usually make between modifying or adding to a program and simply using it. Linking a program
with a library, without changing the library, is in some sense simply using the library, and is
analogous to running a utility program or application program. However, in a textual and legal
sense, the linked executable is a combined work, a derivative of the original library, and the
ordinary General Public License treats it as such.
Because of this blurred distinction, using the ordinary General Public License for libraries did not
effectively promote software sharing, because most developers did not use the libraries. We
concluded that weaker conditions might promote sharing better.
However, unrestricted linking of non-free programs would deprive the users of those programs of all
benefit from the free status of the libraries themselves. This Library General Public License is
intended to permit developers of non-free programs to use free libraries, while preserving your
freedom as a user of such programs to change the free libraries that are incorporated in them. (We
have not seen how to achieve this as regards changes in header files, but we have achieved it as
regards changes in the actual functions of the Library.) The hope is that this will lead to faster
development of free libraries.
The precise terms and conditions for copying, distribution and modification follow. Pay close
attention to the difference between a "work based on the library" and a "work that uses the library".
The former contains code derived from the library, while the latter only works together with the
library.
Note that it is possible for a library to be covered by the ordinary General Public License rather than
by this special one.
GNU LIBRARY GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. This License Agreement applies to any software library which contains a notice placed by the
copyright holder or other authorized party saying it may be distributed under the terms of this
Library General Public License (also called "this License"). Each licensee is addressed as "you".
A "library" means a collection of software functions and/or data prepared so as to be conveniently
linked with application programs (which use some of those functions and data) to form executables.
The "Library", below, refers to any such software library or work which has been distributed under
these terms. A "work based on the Library" means either the Library or any derivative work under
copyright law: that is to say, a work containing the Library or a portion of it, either verbatim or with
modifications and/or translated straightforwardly into another language. (Hereinafter, translation is
included without limitation in the term "modification".)