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1 | 85e53d41 | bellard | GNU LESSER GENERAL PUBLIC LICENSE |
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2 | 85e53d41 | bellard | Version 2.1, February 1999 |
3 | 85e53d41 | bellard | |
4 | 85e53d41 | bellard | Copyright (C) 1991, 1999 Free Software Foundation, Inc. |
5 | 85e53d41 | bellard | 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
6 | 31e31b8a | bellard | Everyone is permitted to copy and distribute verbatim copies |
7 | 31e31b8a | bellard | of this license document, but changing it is not allowed. |
8 | 31e31b8a | bellard | |
9 | 85e53d41 | bellard | [This is the first released version of the Lesser GPL. It also counts |
10 | 85e53d41 | bellard | as the successor of the GNU Library Public License, version 2, hence |
11 | 85e53d41 | bellard | the version number 2.1.] |
12 | 31e31b8a | bellard | |
13 | 31e31b8a | bellard | Preamble |
14 | 31e31b8a | bellard | |
15 | 31e31b8a | bellard | The licenses for most software are designed to take away your |
16 | 31e31b8a | bellard | freedom to share and change it. By contrast, the GNU General Public |
17 | 31e31b8a | bellard | Licenses are intended to guarantee your freedom to share and change |
18 | 31e31b8a | bellard | free software--to make sure the software is free for all its users. |
19 | 31e31b8a | bellard | |
20 | 85e53d41 | bellard | This license, the Lesser General Public License, applies to some |
21 | 85e53d41 | bellard | specially designated software packages--typically libraries--of the |
22 | 85e53d41 | bellard | Free Software Foundation and other authors who decide to use it. You |
23 | 85e53d41 | bellard | can use it too, but we suggest you first think carefully about whether |
24 | 85e53d41 | bellard | this license or the ordinary General Public License is the better |
25 | 85e53d41 | bellard | strategy to use in any particular case, based on the explanations below. |
26 | 85e53d41 | bellard | |
27 | 85e53d41 | bellard | When we speak of free software, we are referring to freedom of use, |
28 | 85e53d41 | bellard | not price. Our General Public Licenses are designed to make sure that |
29 | 85e53d41 | bellard | you have the freedom to distribute copies of free software (and charge |
30 | 85e53d41 | bellard | for this service if you wish); that you receive source code or can get |
31 | 85e53d41 | bellard | it if you want it; that you can change the software and use pieces of |
32 | 85e53d41 | bellard | it in new free programs; and that you are informed that you can do |
33 | 85e53d41 | bellard | these things. |
34 | 31e31b8a | bellard | |
35 | 31e31b8a | bellard | To protect your rights, we need to make restrictions that forbid |
36 | 85e53d41 | bellard | distributors to deny you these rights or to ask you to surrender these |
37 | 85e53d41 | bellard | rights. These restrictions translate to certain responsibilities for |
38 | 85e53d41 | bellard | you if you distribute copies of the library or if you modify it. |
39 | 31e31b8a | bellard | |
40 | 31e31b8a | bellard | For example, if you distribute copies of the library, whether gratis |
41 | 31e31b8a | bellard | or for a fee, you must give the recipients all the rights that we gave |
42 | 31e31b8a | bellard | you. You must make sure that they, too, receive or can get the source |
43 | 85e53d41 | bellard | code. If you link other code with the library, you must provide |
44 | 85e53d41 | bellard | complete object files to the recipients, so that they can relink them |
45 | 85e53d41 | bellard | with the library after making changes to the library and recompiling |
46 | 31e31b8a | bellard | it. And you must show them these terms so they know their rights. |
47 | 31e31b8a | bellard | |
48 | 85e53d41 | bellard | We protect your rights with a two-step method: (1) we copyright the |
49 | 85e53d41 | bellard | library, and (2) we offer you this license, which gives you legal |
50 | 31e31b8a | bellard | permission to copy, distribute and/or modify the library. |
51 | 31e31b8a | bellard | |
52 | 85e53d41 | bellard | To protect each distributor, we want to make it very clear that |
53 | 85e53d41 | bellard | there is no warranty for the free library. Also, if the library is |
54 | 85e53d41 | bellard | modified by someone else and passed on, the recipients should know |
55 | 85e53d41 | bellard | that what they have is not the original version, so that the original |
56 | 85e53d41 | bellard | author's reputation will not be affected by problems that might be |
57 | 85e53d41 | bellard | introduced by others. |
58 | 31e31b8a | bellard | |
59 | 85e53d41 | bellard | Finally, software patents pose a constant threat to the existence of |
60 | 85e53d41 | bellard | any free program. We wish to make sure that a company cannot |
61 | 85e53d41 | bellard | effectively restrict the users of a free program by obtaining a |
62 | 85e53d41 | bellard | restrictive license from a patent holder. Therefore, we insist that |
63 | 85e53d41 | bellard | any patent license obtained for a version of the library must be |
64 | 85e53d41 | bellard | consistent with the full freedom of use specified in this license. |
65 | 85e53d41 | bellard | |
66 | 85e53d41 | bellard | Most GNU software, including some libraries, is covered by the |
67 | 85e53d41 | bellard | ordinary GNU General Public License. This license, the GNU Lesser |
68 | 85e53d41 | bellard | General Public License, applies to certain designated libraries, and |
69 | 85e53d41 | bellard | is quite different from the ordinary General Public License. We use |
70 | 85e53d41 | bellard | this license for certain libraries in order to permit linking those |
71 | 85e53d41 | bellard | libraries into non-free programs. |
72 | 85e53d41 | bellard | |
73 | 85e53d41 | bellard | When a program is linked with a library, whether statically or using |
74 | 85e53d41 | bellard | a shared library, the combination of the two is legally speaking a |
75 | 85e53d41 | bellard | combined work, a derivative of the original library. The ordinary |
76 | 85e53d41 | bellard | General Public License therefore permits such linking only if the |
77 | 85e53d41 | bellard | entire combination fits its criteria of freedom. The Lesser General |
78 | 85e53d41 | bellard | Public License permits more lax criteria for linking other code with |
79 | 85e53d41 | bellard | the library. |
80 | 85e53d41 | bellard | |
81 | 85e53d41 | bellard | We call this license the "Lesser" General Public License because it |
82 | 85e53d41 | bellard | does Less to protect the user's freedom than the ordinary General |
83 | 85e53d41 | bellard | Public License. It also provides other free software developers Less |
84 | 85e53d41 | bellard | of an advantage over competing non-free programs. These disadvantages |
85 | 85e53d41 | bellard | are the reason we use the ordinary General Public License for many |
86 | 85e53d41 | bellard | libraries. However, the Lesser license provides advantages in certain |
87 | 85e53d41 | bellard | special circumstances. |
88 | 85e53d41 | bellard | |
89 | 85e53d41 | bellard | For example, on rare occasions, there may be a special need to |
90 | 85e53d41 | bellard | encourage the widest possible use of a certain library, so that it becomes |
91 | 85e53d41 | bellard | a de-facto standard. To achieve this, non-free programs must be |
92 | 85e53d41 | bellard | allowed to use the library. A more frequent case is that a free |
93 | 85e53d41 | bellard | library does the same job as widely used non-free libraries. In this |
94 | 85e53d41 | bellard | case, there is little to gain by limiting the free library to free |
95 | 85e53d41 | bellard | software only, so we use the Lesser General Public License. |
96 | 85e53d41 | bellard | |
97 | 85e53d41 | bellard | In other cases, permission to use a particular library in non-free |
98 | 85e53d41 | bellard | programs enables a greater number of people to use a large body of |
99 | 85e53d41 | bellard | free software. For example, permission to use the GNU C Library in |
100 | 85e53d41 | bellard | non-free programs enables many more people to use the whole GNU |
101 | 85e53d41 | bellard | operating system, as well as its variant, the GNU/Linux operating |
102 | 85e53d41 | bellard | system. |
103 | 85e53d41 | bellard | |
104 | 85e53d41 | bellard | Although the Lesser General Public License is Less protective of the |
105 | 85e53d41 | bellard | users' freedom, it does ensure that the user of a program that is |
106 | 85e53d41 | bellard | linked with the Library has the freedom and the wherewithal to run |
107 | 85e53d41 | bellard | that program using a modified version of the Library. |
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112 | 85e53d41 | bellard | former contains code derived from the library, whereas the latter must |
113 | 85e53d41 | bellard | be combined with the library in order to run. |
114 | 31e31b8a | bellard | |
115 | 85e53d41 | bellard | GNU LESSER GENERAL PUBLIC LICENSE |
116 | 31e31b8a | bellard | TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION |
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118 | 85e53d41 | bellard | 0. This License Agreement applies to any software library or other |
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252 | 31e31b8a | bellard | When a "work that uses the Library" uses material from a header file |
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298 | 85e53d41 | bellard | b) Use a suitable shared library mechanism for linking with the |
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301 | 85e53d41 | bellard | rather than copying library functions into the executable, and (2) |
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306 | 85e53d41 | bellard | c) Accompany the work with a written offer, valid for at |
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311 | 85e53d41 | bellard | d) If distribution of the work is made by offering access to copy |
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315 | 85e53d41 | bellard | e) Verify that the user has already received a copy of these |
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318 | 31e31b8a | bellard | For an executable, the required form of the "work that uses the |
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325 | 31e31b8a | bellard | the executable. |
326 | 31e31b8a | bellard | |
327 | 31e31b8a | bellard | It may happen that this requirement contradicts the license |
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333 | 31e31b8a | bellard | 7. You may place library facilities that are a work based on the |
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340 | 31e31b8a | bellard | a) Accompany the combined library with a copy of the same work |
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345 | 31e31b8a | bellard | b) Give prominent notice with the combined library of the fact |
346 | 31e31b8a | bellard | that part of it is a work based on the Library, and explaining |
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349 | 31e31b8a | bellard | 8. You may not copy, modify, sublicense, link with, or distribute |
350 | 31e31b8a | bellard | the Library except as expressly provided under this License. Any |
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357 | 31e31b8a | bellard | 9. You are not required to accept this License, since you have not |
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359 | 31e31b8a | bellard | distribute the Library or its derivative works. These actions are |
360 | 31e31b8a | bellard | prohibited by law if you do not accept this License. Therefore, by |
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363 | 31e31b8a | bellard | all its terms and conditions for copying, distributing or modifying |
364 | 31e31b8a | bellard | the Library or works based on it. |
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366 | 31e31b8a | bellard | 10. Each time you redistribute the Library (or any work based on the |
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368 | 31e31b8a | bellard | original licensor to copy, distribute, link with or modify the Library |
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371 | 85e53d41 | bellard | You are not responsible for enforcing compliance by third parties with |
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374 | 31e31b8a | bellard | 11. If, as a consequence of a court judgment or allegation of patent |
375 | 31e31b8a | bellard | infringement or for any other reason (not limited to patent issues), |
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381 | 31e31b8a | bellard | may not distribute the Library at all. For example, if a patent |
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383 | 31e31b8a | bellard | all those who receive copies directly or indirectly through you, then |
384 | 31e31b8a | bellard | the only way you could satisfy both it and this License would be to |
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386 | 31e31b8a | bellard | |
387 | 31e31b8a | bellard | If any portion of this section is held invalid or unenforceable under any |
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389 | 31e31b8a | bellard | and the section as a whole is intended to apply in other circumstances. |
390 | 31e31b8a | bellard | |
391 | 31e31b8a | bellard | It is not the purpose of this section to induce you to infringe any |
392 | 31e31b8a | bellard | patents or other property right claims or to contest validity of any |
393 | 31e31b8a | bellard | such claims; this section has the sole purpose of protecting the |
394 | 31e31b8a | bellard | integrity of the free software distribution system which is |
395 | 31e31b8a | bellard | implemented by public license practices. Many people have made |
396 | 31e31b8a | bellard | generous contributions to the wide range of software distributed |
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399 | 31e31b8a | bellard | to distribute software through any other system and a licensee cannot |
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401 | 31e31b8a | bellard | |
402 | 31e31b8a | bellard | This section is intended to make thoroughly clear what is believed to |
403 | 31e31b8a | bellard | be a consequence of the rest of this License. |
404 | 31e31b8a | bellard | |
405 | 31e31b8a | bellard | 12. If the distribution and/or use of the Library is restricted in |
406 | 31e31b8a | bellard | certain countries either by patents or by copyrighted interfaces, the |
407 | 31e31b8a | bellard | original copyright holder who places the Library under this License may add |
408 | 31e31b8a | bellard | an explicit geographical distribution limitation excluding those countries, |
409 | 31e31b8a | bellard | so that distribution is permitted only in or among countries not thus |
410 | 31e31b8a | bellard | excluded. In such case, this License incorporates the limitation as if |
411 | 31e31b8a | bellard | written in the body of this License. |
412 | 31e31b8a | bellard | |
413 | 31e31b8a | bellard | 13. The Free Software Foundation may publish revised and/or new |
414 | 85e53d41 | bellard | versions of the Lesser General Public License from time to time. |
415 | 31e31b8a | bellard | Such new versions will be similar in spirit to the present version, |
416 | 31e31b8a | bellard | but may differ in detail to address new problems or concerns. |
417 | 31e31b8a | bellard | |
418 | 31e31b8a | bellard | Each version is given a distinguishing version number. If the Library |
419 | 31e31b8a | bellard | specifies a version number of this License which applies to it and |
420 | 31e31b8a | bellard | "any later version", you have the option of following the terms and |
421 | 31e31b8a | bellard | conditions either of that version or of any later version published by |
422 | 31e31b8a | bellard | the Free Software Foundation. If the Library does not specify a |
423 | 31e31b8a | bellard | license version number, you may choose any version ever published by |
424 | 31e31b8a | bellard | the Free Software Foundation. |
425 | 31e31b8a | bellard | |
426 | 31e31b8a | bellard | 14. If you wish to incorporate parts of the Library into other free |
427 | 31e31b8a | bellard | programs whose distribution conditions are incompatible with these, |
428 | 31e31b8a | bellard | write to the author to ask for permission. For software which is |
429 | 31e31b8a | bellard | copyrighted by the Free Software Foundation, write to the Free |
430 | 31e31b8a | bellard | Software Foundation; we sometimes make exceptions for this. Our |
431 | 31e31b8a | bellard | decision will be guided by the two goals of preserving the free status |
432 | 31e31b8a | bellard | of all derivatives of our free software and of promoting the sharing |
433 | 31e31b8a | bellard | and reuse of software generally. |
434 | 31e31b8a | bellard | |
435 | 31e31b8a | bellard | NO WARRANTY |
436 | 31e31b8a | bellard | |
437 | 31e31b8a | bellard | 15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO |
438 | 31e31b8a | bellard | WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW. |
439 | 31e31b8a | bellard | EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR |
440 | 31e31b8a | bellard | OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY |
441 | 31e31b8a | bellard | KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE |
442 | 31e31b8a | bellard | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
443 | 31e31b8a | bellard | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE |
444 | 31e31b8a | bellard | LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME |
445 | 31e31b8a | bellard | THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. |
446 | 31e31b8a | bellard | |
447 | 31e31b8a | bellard | 16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN |
448 | 31e31b8a | bellard | WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY |
449 | 31e31b8a | bellard | AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU |
450 | 31e31b8a | bellard | FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR |
451 | 31e31b8a | bellard | CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE |
452 | 31e31b8a | bellard | LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING |
453 | 31e31b8a | bellard | RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A |
454 | 31e31b8a | bellard | FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF |
455 | 31e31b8a | bellard | SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
456 | 31e31b8a | bellard | DAMAGES. |
457 | 31e31b8a | bellard | |
458 | 31e31b8a | bellard | END OF TERMS AND CONDITIONS |
459 | 31e31b8a | bellard | |
460 | 85e53d41 | bellard | How to Apply These Terms to Your New Libraries |
461 | 31e31b8a | bellard | |
462 | 31e31b8a | bellard | If you develop a new library, and you want it to be of the greatest |
463 | 31e31b8a | bellard | possible use to the public, we recommend making it free software that |
464 | 31e31b8a | bellard | everyone can redistribute and change. You can do so by permitting |
465 | 31e31b8a | bellard | redistribution under these terms (or, alternatively, under the terms of the |
466 | 31e31b8a | bellard | ordinary General Public License). |
467 | 31e31b8a | bellard | |
468 | 31e31b8a | bellard | To apply these terms, attach the following notices to the library. It is |
469 | 31e31b8a | bellard | safest to attach them to the start of each source file to most effectively |
470 | 31e31b8a | bellard | convey the exclusion of warranty; and each file should have at least the |
471 | 31e31b8a | bellard | "copyright" line and a pointer to where the full notice is found. |
472 | 31e31b8a | bellard | |
473 | 31e31b8a | bellard | <one line to give the library's name and a brief idea of what it does.> |
474 | 31e31b8a | bellard | Copyright (C) <year> <name of author> |
475 | 31e31b8a | bellard | |
476 | 31e31b8a | bellard | This library is free software; you can redistribute it and/or |
477 | 85e53d41 | bellard | modify it under the terms of the GNU Lesser General Public |
478 | 31e31b8a | bellard | License as published by the Free Software Foundation; either |
479 | 31e31b8a | bellard | version 2 of the License, or (at your option) any later version. |
480 | 31e31b8a | bellard | |
481 | 31e31b8a | bellard | This library is distributed in the hope that it will be useful, |
482 | 31e31b8a | bellard | but WITHOUT ANY WARRANTY; without even the implied warranty of |
483 | 31e31b8a | bellard | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
484 | 85e53d41 | bellard | Lesser General Public License for more details. |
485 | 31e31b8a | bellard | |
486 | 85e53d41 | bellard | You should have received a copy of the GNU Lesser General Public |
487 | 85e53d41 | bellard | License along with this library; if not, write to the Free Software |
488 | 85e53d41 | bellard | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
489 | 31e31b8a | bellard | |
490 | 31e31b8a | bellard | Also add information on how to contact you by electronic and paper mail. |
491 | 31e31b8a | bellard | |
492 | 31e31b8a | bellard | You should also get your employer (if you work as a programmer) or your |
493 | 31e31b8a | bellard | school, if any, to sign a "copyright disclaimer" for the library, if |
494 | 31e31b8a | bellard | necessary. Here is a sample; alter the names: |
495 | 31e31b8a | bellard | |
496 | 31e31b8a | bellard | Yoyodyne, Inc., hereby disclaims all copyright interest in the |
497 | 31e31b8a | bellard | library `Frob' (a library for tweaking knobs) written by James Random Hacker. |
498 | 31e31b8a | bellard | |
499 | 31e31b8a | bellard | <signature of Ty Coon>, 1 April 1990 |
500 | 31e31b8a | bellard | Ty Coon, President of Vice |
501 | 31e31b8a | bellard | |
502 | 31e31b8a | bellard | That's all there is to it! |
503 | 85e53d41 | bellard |