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@node Library Copying

@appendixsec GNU LESSER GENERAL PUBLIC LICENSE

@cindex LGPL, Lesser General Public License

@center Version 2.1, February 1999

@display

Copyright @copyright{} 1991, 1999 Free Software Foundation, Inc.

51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA

Everyone is permitted to copy and distribute verbatim copies

of this license document, but changing it is not allowed.

[This is the first released version of the Lesser GPL.  It also counts

as the successor of the GNU Library Public License, version 2, hence the

version number 2.1.]

@end display

@appendixsubsec Preamble

  The licenses for most software are designed to take away your

freedom to share and change it.  By contrast, the GNU General Public

Licenses are intended to guarantee your freedom to share and change

free software---to make sure the software is free for all its users.

  This license, the Lesser General Public License, applies to some

specially designated software---typically libraries---of the Free

Software Foundation and other authors who decide to use it.  You can use

it too, but we suggest you first think carefully about whether this

license or the ordinary General Public License is the better strategy to

use in any particular case, based on the explanations below.

  When we speak of free software, we are referring to freedom of use,

not price.  Our General Public Licenses are designed to make sure that

you have the freedom to distribute copies of free software (and charge

for this service if you wish); that you receive source code or can get

it if you want it; that you can change the software and use pieces of it

in new free programs; and that you are informed that you can do these

things.

  To protect your rights, we need to make restrictions that forbid

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rights.  These restrictions translate to certain responsibilities for

you if you distribute copies of the library or if you modify it.

  For example, if you distribute copies of the library, whether gratis

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with the library after making changes to the library and recompiling

it.  And you must show them these terms so they know their rights.

  We protect your rights with a two-step method: (1) we copyright the

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  To protect each distributor, we want to make it very clear that

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  Finally, software patents pose a constant threat to the existence of

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  Most GNU software, including some libraries, is covered by the

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General Public License, applies to certain designated libraries, and

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  When a program is linked with a library, whether statically or using

a shared library, the combination of the two is legally speaking a

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Public License permits more lax criteria for linking other code with

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  We call this license the @dfn{Lesser} General Public License because it

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Public License.  It also provides other free software developers Less

of an advantage over competing non-free programs.  These disadvantages

are the reason we use the ordinary General Public License for many

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  For example, on rare occasions, there may be a special need to

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system.

  Although the Lesser General Public License is Less protective of the

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linked with the Library has the freedom and the wherewithal to run

that program using a modified version of the Library.

  The precise terms and conditions for copying, distribution and

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``work based on the library'' and a ``work that uses the library''.  The

former contains code derived from the library, whereas the latter must

be combined with the library in order to run.

@iftex

@appendixsubsec TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

@end iftex

@ifinfo

@center GNU LESSER GENERAL PUBLIC LICENSE

@center TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

@end ifinfo

@enumerate 0

@item

This License Agreement applies to any software library or other program

which contains a notice placed by the copyright holder or other

authorized party saying it may be distributed under the terms of this

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@enumerate a

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As an exception to the Sections above, you may also combine or

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@enumerate a

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Accompany the work with the complete corresponding

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@enumerate a

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@end enumerate

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If the distribution and/or use of the Library is restricted in

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The Free Software Foundation may publish revised and/or new

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If you wish to incorporate parts of the Library into other free

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@iftex

@heading NO WARRANTY

@end iftex

@ifinfo

@center NO WARRANTY

@end ifinfo

@item

BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO

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@item

IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN

WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY

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FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR

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LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING

RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A

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DAMAGES.

@end enumerate

@iftex

@heading END OF TERMS AND CONDITIONS

@end iftex

@ifinfo

@center END OF TERMS AND CONDITIONS

@end ifinfo

@page

@appendixsubsec How to Apply These Terms to Your New Libraries

  If you develop a new library, and you want it to be of the greatest

possible use to the public, we recommend making it free software that

everyone can redistribute and change.  You can do so by permitting

redistribution under these terms (or, alternatively, under the terms of the

ordinary General Public License).

  To apply these terms, attach the following notices to the library.  It is

safest to attach them to the start of each source file to most effectively

convey the exclusion of warranty; and each file should have at least the

``copyright'' line and a pointer to where the full notice is found.

@smallexample

@var{one line to give the library's name and an idea of what it does.}

Copyright (C) @var{year}  @var{name of author}

This library is free software; you can redistribute it and/or modify it

under the terms of the GNU Lesser General Public License as published by

the Free Software Foundation; either version 2.1 of the License, or (at

your option) any later version.

This library 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

Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public

License along with this library; if not, write to the Free Software

Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,

USA.

@end smallexample

Also add information on how to contact you by electronic and paper mail.

You should also get your employer (if you work as a programmer) or your

school, if any, to sign a ``copyright disclaimer'' for the library, if

necessary.  Here is a sample; alter the names:

@smallexample

Yoyodyne, Inc., hereby disclaims all copyright interest in the library

`Frob' (a library for tweaking knobs) written by James Random Hacker.

@var{signature of Ty Coon}, 1 April 1990

Ty Coon, President of Vice

@end smallexample

That's all there is to it!