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You should have received a copy of
the GNU General Public License along
with this program; if not, write to the
Free Software Foundation, Inc., 51
Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.

Also add information on how to contact
you by electronic and paper mail.
If the program is interactive, make it output
a short notice like this when it starts in an
interactive mode:

Gnomovision version 69, Copyright ©
year name of author
Gnomovision comes with ABSOLUTELY
NO WARRANTY; for details type `show
w'. This is free software, and you are
welcome to redistribute it under
certain conditions; type `show c' for
details.

The hypothetical commands `show w' and
`show c' should show the appropriate parts
of the General Public License. Of course,
the commands you use may be called
something other than `show w' and `show
c'; they could even be mouse-clicks or
menu items--whatever suits your program.
You should also get your employer (if you
work as a programmer) or your school, if
any, to sign a "copyright disclaimer" for the
program, if necessary. Here is a sample;
alter the names:

Yoyodyne, Inc., hereby disclaims all
copyright interest in the program
`Gnomovision' (which makes passes at
compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice

This General Public License does not
permit incorporating your program into
proprietary programs. If your program is
a subroutine library, you may consider it
more useful to permit linking proprietary
applications with the library. If this is what
you want to do, use the GNU Lesser General
Public License instead of this License.

GNU LESSER

GENERAL PUBLIC

LICENSE

Version 2.1, February 1999
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.]

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 packages--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
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To protect your rights, we need to make
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For example, if you distribute copies of the
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We protect your rights with a two-step
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To protect each distributor, we want to
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Finally, software patents pose a constant
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We wish to make sure that a company
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insist that any patent license obtained for
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this license.
Most GNU software, including some

libraries, is covered by the ordinary GNU
General Public License. This license, the
GNU Lesser General Public License, applies
to certain designated libraries, and is quite
different from the ordinary General Public
License. We use this license for certain
libraries in order to permit linking those
libraries into non-free programs.
When a program is linked with a library,
whether statically or using a shared library,
the combination of the two is legally
speaking a combined work, a derivative of
the original library. The ordinary General
Public License therefore permits such
linking only if the entire combination fits
its criteria of freedom. The Lesser General
Public License permits more lax criteria for
linking other code with the library.
We call this license the "Lesser" General
Public License because it does Less to
protect the user's freedom than the
ordinary General 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 libraries. However,
the Lesser license provides advantages in
certain special circumstances.
For example, on rare occasions, there may
be a special need to encourage the widest
possible use of a certain library, so that it
becomes a de-facto standard. To achieve
this, non-free programs must be allowed to
use the library. A more frequent case is that
a free library does the same job as widely
used non-free libraries. In this case, there
is little to gain by limiting the free library
to free software only, so we use the Lesser
General Public License.
In other cases, permission to use a
particular library in non-free programs
enables a greater number of people to use
a large body of free software. For example,
permission to use the GNU C Library in
non-free programs enables many more
people to use the whole GNU operating
system, as well as its variant, the GNU/Linux
operating system.
Although the Lesser General Public License
is Less protective of the users' freedom, it
does ensure that the user of a program that
is 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
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