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1 | @c The GNU Lesser General Public License. | ||
2 | @center Version 2.1, February 1999 | ||
3 | |||
4 | @c This file is intended to be included within another document, | ||
5 | @c hence no sectioning command or @node. | ||
6 | |||
7 | @display | ||
8 | Copyright @copyright{} 1991, 1999 Free Software Foundation, Inc. | ||
9 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA | ||
10 | |||
11 | Everyone is permitted to copy and distribute verbatim copies | ||
12 | of this license document, but changing it is not allowed. | ||
13 | |||
14 | [This is the first released version of the Lesser GPL. It also counts | ||
15 | as the successor of the GNU Library Public License, version 2, hence the | ||
16 | version number 2.1.] | ||
17 | @end display | ||
18 | |||
19 | @subheading Preamble | ||
20 | |||
21 | The licenses for most software are designed to take away your | ||
22 | freedom to share and change it. By contrast, the GNU General Public | ||
23 | Licenses are intended to guarantee your freedom to share and change | ||
24 | free software---to make sure the software is free for all its users. | ||
25 | |||
26 | This license, the Lesser General Public License, applies to some | ||
27 | specially designated software---typically libraries---of the Free | ||
28 | Software Foundation and other authors who decide to use it. You can use | ||
29 | it too, but we suggest you first think carefully about whether this | ||
30 | license or the ordinary General Public License is the better strategy to | ||
31 | use in any particular case, based on the explanations below. | ||
32 | |||
33 | When we speak of free software, we are referring to freedom of use, | ||
34 | not price. Our General Public Licenses are designed to make sure that | ||
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40 | |||
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86 | |||
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108 | system. | ||
109 | |||
110 | Although the Lesser General Public License is Less protective of the | ||
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120 | |||
121 | @subheading TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION | ||
122 | |||
123 | @enumerate 0 | ||
124 | @item | ||
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155 | and what the program that uses the Library does. | ||
156 | |||
157 | @item | ||
158 | You may copy and distribute verbatim copies of the Library's | ||
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168 | fee. | ||
169 | |||
170 | @item | ||
171 | You may modify your copy or copies of the Library or any portion | ||
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175 | |||
176 | @enumerate a | ||
177 | @item | ||
178 | The modified work must itself be a software library. | ||
179 | |||
180 | @item | ||
181 | You must cause the files modified to carry prominent notices | ||
182 | stating that you changed the files and the date of any change. | ||
183 | |||
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185 | You must cause the whole of the work to be licensed at no | ||
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189 | If a facility in the modified Library refers to a function or a | ||
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193 | in the event an application does not supply such function or | ||
194 | table, the facility still operates, and performs whatever part of | ||
195 | its purpose remains meaningful. | ||
196 | |||
197 | (For example, a function in a library to compute square roots has | ||
198 | a purpose that is entirely well-defined independent of the | ||
199 | application. Therefore, Subsection 2d requires that any | ||
200 | application-supplied function or table used by this function must | ||
201 | be optional: if the application does not supply it, the square | ||
202 | root function must still compute square roots.) | ||
203 | @end enumerate | ||
204 | |||
205 | These requirements apply to the modified work as a whole. If | ||
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214 | it. | ||
215 | |||
216 | Thus, it is not the intent of this section to claim rights or contest | ||
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224 | the scope of this License. | ||
225 | |||
226 | @item | ||
227 | You may opt to apply the terms of the ordinary GNU General Public | ||
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234 | these notices. | ||
235 | |||
236 | Once this change is made in a given copy, it is irreversible for | ||
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238 | subsequent copies and derivative works made from that copy. | ||
239 | |||
240 | This option is useful when you wish to copy part of the code of | ||
241 | the Library into a program that is not a library. | ||
242 | |||
243 | @item | ||
244 | You may copy and distribute the Library (or a portion or | ||
245 | derivative of it, under Section 2) in object code or executable form | ||
246 | under the terms of Sections 1 and 2 above provided that you accompany | ||
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249 | medium customarily used for software interchange. | ||
250 | |||
251 | If distribution of object code is made by offering access to copy | ||
252 | from a designated place, then offering equivalent access to copy the | ||
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254 | distribute the source code, even though third parties are not | ||
255 | compelled to copy the source along with the object code. | ||
256 | |||
257 | @item | ||
258 | A program that contains no derivative of any portion of the | ||
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260 | linked with it, is called a ``work that uses the Library''. Such a | ||
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262 | therefore falls outside the scope of this License. | ||
263 | |||
264 | However, linking a ``work that uses the Library'' with the Library | ||
265 | creates an executable that is a derivative of the Library (because it | ||
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269 | |||
270 | When a ``work that uses the Library'' uses material from a header file | ||
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275 | threshold for this to be true is not precisely defined by law. | ||
276 | |||
277 | If such an object file uses only numerical parameters, data | ||
278 | structure layouts and accessors, and small macros and small inline | ||
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280 | file is unrestricted, regardless of whether it is legally a derivative | ||
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283 | |||
284 | Otherwise, if the work is a derivative of the Library, you may | ||
285 | distribute the object code for the work under the terms of Section 6. | ||
286 | Any executables containing that work also fall under Section 6, | ||
287 | whether or not they are linked directly with the Library itself. | ||
288 | |||
289 | @item | ||
290 | As an exception to the Sections above, you may also combine or | ||
291 | link a ``work that uses the Library'' with the Library to produce a | ||
292 | work containing portions of the Library, and distribute that work | ||
293 | under terms of your choice, provided that the terms permit | ||
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295 | engineering for debugging such modifications. | ||
296 | |||
297 | You must give prominent notice with each copy of the work that the | ||
298 | Library is used in it and that the Library and its use are covered by | ||
299 | this License. You must supply a copy of this License. If the work | ||
300 | during execution displays copyright notices, you must include the | ||
301 | copyright notice for the Library among them, as well as a reference | ||
302 | directing the user to the copy of this License. Also, you must do one | ||
303 | of these things: | ||
304 | |||
305 | @enumerate a | ||
306 | @item | ||
307 | Accompany the work with the complete corresponding | ||
308 | machine-readable source code for the Library including whatever | ||
309 | changes were used in the work (which must be distributed under | ||
310 | Sections 1 and 2 above); and, if the work is an executable linked | ||
311 | with the Library, with the complete machine-readable ``work that | ||
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313 | user can modify the Library and then relink to produce a modified | ||
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315 | that the user who changes the contents of definitions files in the | ||
316 | Library will not necessarily be able to recompile the application | ||
317 | to use the modified definitions.) | ||
318 | |||
319 | @item | ||
320 | Use a suitable shared library mechanism for linking with the Library. A | ||
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322 | library already present on the user's computer system, rather than | ||
323 | copying library functions into the executable, and (2) will operate | ||
324 | properly with a modified version of the library, if the user installs | ||
325 | one, as long as the modified version is interface-compatible with the | ||
326 | version that the work was made with. | ||
327 | |||
328 | @item | ||
329 | Accompany the work with a written offer, valid for at | ||
330 | least three years, to give the same user the materials | ||
331 | specified in Subsection 6a, above, for a charge no more | ||
332 | than the cost of performing this distribution. | ||
333 | |||
334 | @item | ||
335 | If distribution of the work is made by offering access to copy | ||
336 | from a designated place, offer equivalent access to copy the above | ||
337 | specified materials from the same place. | ||
338 | |||
339 | @item | ||
340 | Verify that the user has already received a copy of these | ||
341 | materials or that you have already sent this user a copy. | ||
342 | @end enumerate | ||
343 | |||
344 | For an executable, the required form of the ``work that uses the | ||
345 | Library'' must include any data and utility programs needed for | ||
346 | reproducing the executable from it. However, as a special exception, | ||
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349 | components (compiler, kernel, and so on) of the operating system on | ||
350 | which the executable runs, unless that component itself accompanies the | ||
351 | executable. | ||
352 | |||
353 | It may happen that this requirement contradicts the license | ||
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355 | accompany the operating system. Such a contradiction means you cannot | ||
356 | use both them and the Library together in an executable that you | ||
357 | distribute. | ||
358 | |||
359 | @item | ||
360 | You may place library facilities that are a work based on the | ||
361 | Library side-by-side in a single library together with other library | ||
362 | facilities not covered by this License, and distribute such a combined | ||
363 | library, provided that the separate distribution of the work based on | ||
364 | the Library and of the other library facilities is otherwise | ||
365 | permitted, and provided that you do these two things: | ||
366 | |||
367 | @enumerate a | ||
368 | @item | ||
369 | Accompany the combined library with a copy of the same work | ||
370 | based on the Library, uncombined with any other library | ||
371 | facilities. This must be distributed under the terms of the | ||
372 | Sections above. | ||
373 | |||
374 | @item | ||
375 | Give prominent notice with the combined library of the fact | ||
376 | that part of it is a work based on the Library, and explaining | ||
377 | where to find the accompanying uncombined form of the same work. | ||
378 | @end enumerate | ||
379 | |||
380 | @item | ||
381 | You may not copy, modify, sublicense, link with, or distribute | ||
382 | the Library except as expressly provided under this License. Any | ||
383 | attempt otherwise to copy, modify, sublicense, link with, or | ||
384 | distribute the Library is void, and will automatically terminate your | ||
385 | rights under this License. However, parties who have received copies, | ||
386 | or rights, from you under this License will not have their licenses | ||
387 | terminated so long as such parties remain in full compliance. | ||
388 | |||
389 | @item | ||
390 | You are not required to accept this License, since you have not | ||
391 | signed it. However, nothing else grants you permission to modify or | ||
392 | distribute the Library or its derivative works. These actions are | ||
393 | prohibited by law if you do not accept this License. Therefore, by | ||
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395 | Library), you indicate your acceptance of this License to do so, and | ||
396 | all its terms and conditions for copying, distributing or modifying | ||
397 | the Library or works based on it. | ||
398 | |||
399 | @item | ||
400 | Each time you redistribute the Library (or any work based on the | ||
401 | Library), the recipient automatically receives a license from the | ||
402 | original licensor to copy, distribute, link with or modify the Library | ||
403 | subject to these terms and conditions. You may not impose any further | ||
404 | restrictions on the recipients' exercise of the rights granted herein. | ||
405 | You are not responsible for enforcing compliance by third parties with | ||
406 | this License. | ||
407 | |||
408 | @item | ||
409 | If, as a consequence of a court judgment or allegation of patent | ||
410 | infringement or for any other reason (not limited to patent issues), | ||
411 | conditions are imposed on you (whether by court order, agreement or | ||
412 | otherwise) that contradict the conditions of this License, they do not | ||
413 | excuse you from the conditions of this License. If you cannot | ||
414 | distribute so as to satisfy simultaneously your obligations under this | ||
415 | License and any other pertinent obligations, then as a consequence you | ||
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417 | license would not permit royalty-free redistribution of the Library by | ||
418 | all those who receive copies directly or indirectly through you, then | ||
419 | the only way you could satisfy both it and this License would be to | ||
420 | refrain entirely from distribution of the Library. | ||
421 | |||
422 | If any portion of this section is held invalid or unenforceable under any | ||
423 | particular circumstance, the balance of the section is intended to apply, | ||
424 | and the section as a whole is intended to apply in other circumstances. | ||
425 | |||
426 | It is not the purpose of this section to induce you to infringe any | ||
427 | patents or other property right claims or to contest validity of any | ||
428 | such claims; this section has the sole purpose of protecting the | ||
429 | integrity of the free software distribution system which is | ||
430 | implemented by public license practices. Many people have made | ||
431 | generous contributions to the wide range of software distributed | ||
432 | through that system in reliance on consistent application of that | ||
433 | system; it is up to the author/donor to decide if he or she is willing | ||
434 | to distribute software through any other system and a licensee cannot | ||
435 | impose that choice. | ||
436 | |||
437 | This section is intended to make thoroughly clear what is believed to | ||
438 | be a consequence of the rest of this License. | ||
439 | |||
440 | @item | ||
441 | If the distribution and/or use of the Library is restricted in | ||
442 | certain countries either by patents or by copyrighted interfaces, the | ||
443 | original copyright holder who places the Library under this License may add | ||
444 | an explicit geographical distribution limitation excluding those countries, | ||
445 | so that distribution is permitted only in or among countries not thus | ||
446 | excluded. In such case, this License incorporates the limitation as if | ||
447 | written in the body of this License. | ||
448 | |||
449 | @item | ||
450 | The Free Software Foundation may publish revised and/or new | ||
451 | versions of the Lesser General Public License from time to time. | ||
452 | Such new versions will be similar in spirit to the present version, | ||
453 | but may differ in detail to address new problems or concerns. | ||
454 | |||
455 | Each version is given a distinguishing version number. If the Library | ||
456 | specifies a version number of this License which applies to it and | ||
457 | ``any later version'', you have the option of following the terms and | ||
458 | conditions either of that version or of any later version published by | ||
459 | the Free Software Foundation. If the Library does not specify a | ||
460 | license version number, you may choose any version ever published by | ||
461 | the Free Software Foundation. | ||
462 | |||
463 | @item | ||
464 | If you wish to incorporate parts of the Library into other free | ||
465 | programs whose distribution conditions are incompatible with these, | ||
466 | write to the author to ask for permission. For software which is | ||
467 | copyrighted by the Free Software Foundation, write to the Free | ||
468 | Software Foundation; we sometimes make exceptions for this. Our | ||
469 | decision will be guided by the two goals of preserving the free status | ||
470 | of all derivatives of our free software and of promoting the sharing | ||
471 | and reuse of software generally. | ||
472 | |||
473 | @iftex | ||
474 | @heading NO WARRANTY | ||
475 | @end iftex | ||
476 | @ifinfo | ||
477 | @center NO WARRANTY | ||
478 | |||
479 | @end ifinfo | ||
480 | |||
481 | @item | ||
482 | BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO | ||
483 | WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW. | ||
484 | EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR | ||
485 | OTHER PARTIES PROVIDE THE LIBRARY ``AS IS'' WITHOUT WARRANTY OF ANY | ||
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489 | LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME | ||
490 | THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. | ||
491 | |||
492 | @item | ||
493 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN | ||
494 | WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY | ||
495 | AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU | ||
496 | FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR | ||
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498 | LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING | ||
499 | RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A | ||
500 | FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF | ||
501 | SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH | ||
502 | DAMAGES. | ||
503 | @end enumerate | ||
504 | |||
505 | @iftex | ||
506 | @heading END OF TERMS AND CONDITIONS | ||
507 | @end iftex | ||
508 | @ifinfo | ||
509 | @center END OF TERMS AND CONDITIONS | ||
510 | |||
511 | @end ifinfo | ||
512 | |||
513 | @page | ||
514 | @subheading How to Apply These Terms to Your New Libraries | ||
515 | |||
516 | If you develop a new library, and you want it to be of the greatest | ||
517 | possible use to the public, we recommend making it free software that | ||
518 | everyone can redistribute and change. You can do so by permitting | ||
519 | redistribution under these terms (or, alternatively, under the terms of the | ||
520 | ordinary General Public License). | ||
521 | |||
522 | To apply these terms, attach the following notices to the library. It is | ||
523 | safest to attach them to the start of each source file to most effectively | ||
524 | convey the exclusion of warranty; and each file should have at least the | ||
525 | ``copyright'' line and a pointer to where the full notice is found. | ||
526 | |||
527 | @smallexample | ||
528 | @var{one line to give the library's name and an idea of what it does.} | ||
529 | Copyright (C) @var{year} @var{name of author} | ||
530 | |||
531 | This library is free software; you can redistribute it and/or modify it | ||
532 | under the terms of the GNU Lesser General Public License as published by | ||
533 | the Free Software Foundation; either version 2.1 of the License, or (at | ||
534 | your option) any later version. | ||
535 | |||
536 | This library is distributed in the hope that it will be useful, but | ||
537 | WITHOUT ANY WARRANTY; without even the implied warranty of | ||
538 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
539 | Lesser General Public License for more details. | ||
540 | |||
541 | You should have received a copy of the GNU Lesser General Public | ||
542 | License along with this library; if not, write to the Free Software | ||
543 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, | ||
544 | USA. | ||
545 | @end smallexample | ||
546 | |||
547 | Also add information on how to contact you by electronic and paper mail. | ||
548 | |||
549 | You should also get your employer (if you work as a programmer) or your | ||
550 | school, if any, to sign a ``copyright disclaimer'' for the library, if | ||
551 | necessary. Here is a sample; alter the names: | ||
552 | |||
553 | @smallexample | ||
554 | Yoyodyne, Inc., hereby disclaims all copyright interest in the library | ||
555 | `Frob' (a library for tweaking knobs) written by James Random Hacker. | ||
556 | |||
557 | @var{signature of Ty Coon}, 1 April 1990 | ||
558 | Ty Coon, President of Vice | ||
559 | @end smallexample | ||
560 | |||
561 | That's all there is to it! | ||