Spaces:
Sleeping
Sleeping
GNU LESSER GENERAL PUBLIC LICENSE | |
Version 2.1, February 1999 | |
Copyright (C) 1991, 1999 Free Software Foundation, Inc. | |
59 Temple Place, Suite 330, Boston, MA 02111-1307 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 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 | |
distributors to deny you these rights or to ask you to surrender these | |
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 | |
or for a fee, you must give the recipients all the rights that we gave | |
you. You must make sure that they, too, receive or can get the source | |
code. If you link other code with the library, you must provide | |
complete object files to the recipients, so that they can relink them | |
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 | |
library, and (2) we offer you this license, which gives you legal | |
permission to copy, distribute and/or modify the library. | |
To protect each distributor, we want to make it very clear that | |
there is no warranty for the free library. Also, if the library is | |
modified by someone else and passed on, the recipients should know | |
that what they have is not the original version, so that the original | |
author's reputation will not be affected by problems that might be | |
introduced by others. | |
Finally, software patents pose a constant threat to the existence of | |
any free program. We wish to make sure that a company cannot | |
effectively restrict the users of a free program by obtaining a | |
restrictive license from a patent holder. Therefore, we insist that | |
any patent license obtained for a version of the library must be | |
consistent with the full freedom of use specified in 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 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, whereas the latter must | |
be combined with the library in order to run. | |
GNU LESSER GENERAL PUBLIC LICENSE | |
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION | |
0. 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 Lesser 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".) | |
"Source code" for a work means the preferred form of the work for | |
making modifications to it. For a library, complete source code means | |
all the source code for all modules it contains, plus any associated | |
interface definition files, plus the scripts used to control compilation | |
and installation of the library. | |
Activities other than copying, distribution and modification are not | |
covered by this License; they are outside its scope. The act of | |
running a program using the Library is not restricted, and output from | |
such a program is covered only if its contents constitute a work based | |
on the Library (independent of the use of the Library in a tool for | |
writing it). Whether that is true depends on what the Library does | |
and what the program that uses the Library does. | |
1. You may copy and distribute verbatim copies of the Library's | |
complete source code as you receive it, in any medium, provided that | |
you conspicuously and appropriately publish on each copy an | |
appropriate copyright notice and disclaimer of warranty; keep intact | |
all the notices that refer to this License and to the absence of any | |
warranty; and distribute a copy of this License along with the | |
Library. | |
You may charge a fee for the physical act of transferring a copy, | |
and you may at your option offer warranty protection in exchange for a | |
fee. | |
2. You may modify your copy or copies of the Library or any portion | |
of it, thus forming a work based on the Library, and copy and | |
distribute such modifications or work under the terms of Section 1 | |
above, provided that you also meet all of these conditions: | |
a) The modified work must itself be a software library. | |
b) You must cause the files modified to carry prominent notices | |
stating that you changed the files and the date of any change. | |
c) You must cause the whole of the work to be licensed at no | |
charge to all third parties under the terms of this License. | |
d) If a facility in the modified Library refers to a function or a | |
table of data to be supplied by an application program that uses | |
the facility, other than as an argument passed when the facility | |
is invoked, then you must make a good faith effort to ensure that, | |
in the event an application does not supply such function or | |
table, the facility still operates, and performs whatever part of | |
its purpose remains meaningful. | |
(For example, a function in a library to compute square roots has | |
a purpose that is entirely well-defined independent of the | |
application. Therefore, Subsection 2d requires that any | |
application-supplied function or table used by this function must | |
be optional: if the application does not supply it, the square | |
root function must still compute square roots.) | |
These requirements apply to the modified work as a whole. If | |
identifiable sections of that work are not derived from the Library, | |
and can be reasonably considered independent and separate works in | |
themselves, then this License, and its terms, do not apply to those | |
sections when you distribute them as separate works. But when you | |
distribute the same sections as part of a whole which is a work based | |
on the Library, the distribution of the whole must be on the terms of | |
this License, whose permissions for other licensees extend to the | |
entire whole, and thus to each and every part regardless of who wrote | |
it. | |
Thus, it is not the intent of this section to claim rights or contest | |
your rights to work written entirely by you; rather, the intent is to | |
exercise the right to control the distribution of derivative or | |
collective works based on the Library. | |
In addition, mere aggregation of another work not based on the Library | |
with the Library (or with a work based on the Library) on a volume of | |
a storage or distribution medium does not bring the other work under | |
the scope of this License. | |
3. You may opt to apply the terms of the ordinary GNU General Public | |
License instead of this License to a given copy of the Library. To do | |
this, you must alter all the notices that refer to this License, so | |
that they refer to the ordinary GNU General Public License, version 2, | |
instead of to this License. (If a newer version than version 2 of the | |
ordinary GNU General Public License has appeared, then you can specify | |
that version instead if you wish.) Do not make any other change in | |
these notices. | |
Once this change is made in a given copy, it is irreversible for | |
that copy, so the ordinary GNU General Public License applies to all | |
subsequent copies and derivative works made from that copy. | |
This option is useful when you wish to copy part of the code of | |
the Library into a program that is not a library. | |
4. You may copy and distribute the Library (or a portion or | |
derivative of it, under Section 2) in object code or executable form | |
under the terms of Sections 1 and 2 above provided that you accompany | |
it with the complete corresponding machine-readable source code, which | |
must be distributed under the terms of Sections 1 and 2 above on a | |
medium customarily used for software interchange. | |
If distribution of object code is made by offering access to copy | |
from a designated place, then offering equivalent access to copy the | |
source code from the same place satisfies the requirement to | |
distribute the source code, even though third parties are not | |
compelled to copy the source along with the object code. | |
5. A program that contains no derivative of any portion of the | |
Library, but is designed to work with the Library by being compiled or | |
linked with it, is called a "work that uses the Library". Such a | |
work, in isolation, is not a derivative work of the Library, and | |
therefore falls outside the scope of this License. | |
However, linking a "work that uses the Library" with the Library | |
creates an executable that is a derivative of the Library (because it | |
contains portions of the Library), rather than a "work that uses the | |
library". The executable is therefore covered by this License. | |
Section 6 states terms for distribution of such executables. | |
When a "work that uses the Library" uses material from a header file | |
that is part of the Library, the object code for the work may be a | |
derivative work of the Library even though the source code is not. | |
Whether this is true is especially significant if the work can be | |
linked without the Library, or if the work is itself a library. The | |
threshold for this to be true is not precisely defined by law. | |
If such an object file uses only numerical parameters, data | |
structure layouts and accessors, and small macros and small inline | |
functions (ten lines or less in length), then the use of the object | |
file is unrestricted, regardless of whether it is legally a derivative | |
work. (Executables containing this object code plus portions of the | |
Library will still fall under Section 6.) | |
Otherwise, if the work is a derivative of the Library, you may | |
distribute the object code for the work under the terms of Section 6. | |
Any executables containing that work also fall under Section 6, | |
whether or not they are linked directly with the Library itself. | |
6. As an exception to the Sections above, you may also combine or | |
link a "work that uses the Library" with the Library to produce a | |
work containing portions of the Library, and distribute that work | |
under terms of your choice, provided that the terms permit | |
modification of the work for the customer's own use and reverse | |
engineering for debugging such modifications. | |
You must give prominent notice with each copy of the work that the | |
Library is used in it and that the Library and its use are covered by | |
this License. You must supply a copy of this License. If the work | |
during execution displays copyright notices, you must include the | |
copyright notice for the Library among them, as well as a reference | |
directing the user to the copy of this License. Also, you must do one | |
of these things: | |
a) Accompany the work with the complete corresponding | |
machine-readable source code for the Library including whatever | |
changes were used in the work (which must be distributed under | |
Sections 1 and 2 above); and, if the work is an executable linked | |
with the Library, with the complete machine-readable "work that | |
uses the Library", as object code and/or source code, so that the | |
user can modify the Library and then relink to produce a modified | |
executable containing the modified Library. (It is understood | |
that the user who changes the contents of definitions files in the | |
Library will not necessarily be able to recompile the application | |
to use the modified definitions.) | |
b) Use a suitable shared library mechanism for linking with the | |
Library. A suitable mechanism is one that (1) uses at run time a | |
copy of the library already present on the user's computer system, | |
rather than copying library functions into the executable, and (2) | |
will operate properly with a modified version of the library, if | |
the user installs one, as long as the modified version is | |
interface-compatible with the version that the work was made with. | |
c) Accompany the work with a written offer, valid for at | |
least three years, to give the same user the materials | |
specified in Subsection 6a, above, for a charge no more | |
than the cost of performing this distribution. | |
d) If distribution of the work is made by offering access to copy | |
from a designated place, offer equivalent access to copy the above | |
specified materials from the same place. | |
e) Verify that the user has already received a copy of these | |
materials or that you have already sent this user a copy. | |
For an executable, the required form of the "work that uses the | |
Library" must include any data and utility programs needed for | |
reproducing the executable from it. However, as a special exception, | |
the materials to be distributed need not include anything that is | |
normally distributed (in either source or binary form) with the major | |
components (compiler, kernel, and so on) of the operating system on | |
which the executable runs, unless that component itself accompanies | |
the executable. | |
It may happen that this requirement contradicts the license | |
restrictions of other proprietary libraries that do not normally | |
accompany the operating system. Such a contradiction means you cannot | |
use both them and the Library together in an executable that you | |
distribute. | |
7. You may place library facilities that are a work based on the | |
Library side-by-side in a single library together with other library | |
facilities not covered by this License, and distribute such a combined | |
library, provided that the separate distribution of the work based on | |
the Library and of the other library facilities is otherwise | |
permitted, and provided that you do these two things: | |
a) Accompany the combined library with a copy of the same work | |
based on the Library, uncombined with any other library | |
facilities. This must be distributed under the terms of the | |
Sections above. | |
b) Give prominent notice with the combined library of the fact | |
that part of it is a work based on the Library, and explaining | |
where to find the accompanying uncombined form of the same work. | |
8. You may not copy, modify, sublicense, link with, or distribute | |
the Library except as expressly provided under this License. Any | |
attempt otherwise to copy, modify, sublicense, link with, or | |
distribute the Library is void, and will automatically terminate your | |
rights under this License. However, parties who have received copies, | |
or rights, from you under this License will not have their licenses | |
terminated so long as such parties remain in full compliance. | |
9. You are not required to accept this License, since you have not | |
signed it. However, nothing else grants you permission to modify or | |
distribute the Library or its derivative works. These actions are | |
prohibited by law if you do not accept this License. Therefore, by | |
modifying or distributing the Library (or any work based on the | |
Library), you indicate your acceptance of this License to do so, and | |
all its terms and conditions for copying, distributing or modifying | |
the Library or works based on it. | |
10. Each time you redistribute the Library (or any work based on the | |
Library), the recipient automatically receives a license from the | |
original licensor to copy, distribute, link with or modify the Library | |
subject to these terms and conditions. You may not impose any further | |
restrictions on the recipients' exercise of the rights granted herein. | |
You are not responsible for enforcing compliance by third parties with | |
this License. | |
11. If, as a consequence of a court judgment or allegation of patent | |
infringement or for any other reason (not limited to patent issues), | |
conditions are imposed on you (whether by court order, agreement or | |
otherwise) that contradict the conditions of this License, they do not | |
excuse you from the conditions of this License. If you cannot | |
distribute so as to satisfy simultaneously your obligations under this | |
License and any other pertinent obligations, then as a consequence you | |
may not distribute the Library at all. For example, if a patent | |
license would not permit royalty-free redistribution of the Library by | |
all those who receive copies directly or indirectly through you, then | |
the only way you could satisfy both it and this License would be to | |
refrain entirely from distribution of the Library. | |
If any portion of this section is held invalid or unenforceable under any | |
particular circumstance, the balance of the section is intended to apply, | |
and the section as a whole is intended to apply in other circumstances. | |
It is not the purpose of this section to induce you to infringe any | |
patents or other property right claims or to contest validity of any | |
such claims; this section has the sole purpose of protecting the | |
integrity of the free software distribution system which is | |
implemented by public license practices. Many people have made | |
generous contributions to the wide range of software distributed | |
through that system in reliance on consistent application of that | |
system; it is up to the author/donor to decide if he or she is willing | |
to distribute software through any other system and a licensee cannot | |
impose that choice. | |
This section is intended to make thoroughly clear what is believed to | |
be a consequence of the rest of this License. | |
12. If the distribution and/or use of the Library is restricted in | |
certain countries either by patents or by copyrighted interfaces, the | |
original copyright holder who places the Library under this License may add | |
an explicit geographical distribution limitation excluding those countries, | |
so that distribution is permitted only in or among countries not thus | |
excluded. In such case, this License incorporates the limitation as if | |
written in the body of this License. | |
13. The Free Software Foundation may publish revised and/or new | |
versions of the Lesser General Public License from time to time. | |
Such new versions will be similar in spirit to the present version, | |
but may differ in detail to address new problems or concerns. | |
Each version is given a distinguishing version number. If the Library | |
specifies a version number of this License which applies to it and | |
"any later version", you have the option of following the terms and | |
conditions either of that version or of any later version published by | |
the Free Software Foundation. If the Library does not specify a | |
license version number, you may choose any version ever published by | |
the Free Software Foundation. | |
14. If you wish to incorporate parts of the Library into other free | |
programs whose distribution conditions are incompatible with these, | |
write to the author to ask for permission. For software which is | |
copyrighted by the Free Software Foundation, write to the Free | |
Software Foundation; we sometimes make exceptions for this. Our | |
decision will be guided by the two goals of preserving the free status | |
of all derivatives of our free software and of promoting the sharing | |
and reuse of software generally. | |
NO WARRANTY | |
15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO | |
WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW. | |
EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR | |
OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY | |
KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE | |
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE | |
LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME | |
THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. | |
16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN | |
WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY | |
AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU | |
FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR | |
CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE | |
LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING | |
RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A | |
FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF | |
SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH | |
DAMAGES. | |
END OF TERMS AND CONDITIONS | |
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. | |
<one line to give the library's name and a brief idea of what it does.> | |
Copyright (C) <year> <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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
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: | |
Yoyodyne, Inc., hereby disclaims all copyright interest in the | |
library `Frob' (a library for tweaking knobs) written by James Random Hacker. | |
<signature of Ty Coon>, 1 April 1990 | |
Ty Coon, President of Vice | |
That's all there is to it! | |