aeslua/License.txt

changeset 0
598d09faf89c
equal deleted inserted replaced
-1:000000000000 0:598d09faf89c
1 ----------------------------------------------------------------------
2 The aeslua (all versions) is provided under the terms and
3 conditions of the GNU Lesser General Public Library, which is stated
4 below. It can also be found at:
5
6 http://www.gnu.org/copyleft/lesser.html
7
8 ----------------------------------------------------------------------
9
10 GNU LESSER GENERAL PUBLIC LICENSE
11
12 Version 2.1, February 1999
13
14 Copyright (C) 1991, 1999 Free Software Foundation, Inc.
15 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 Everyone is permitted to copy and distribute verbatim copies
17 of this license document, but changing it is not allowed.
18
19 [This is the first released version of the Lesser GPL. It also counts
20 as the successor of the GNU Library Public License, version 2, hence the
21 version number 2.1.]
22
23 Preamble
24
25 The licenses for most software are designed to take away your freedom to
26 share and change it. By contrast, the GNU General Public Licenses are
27 intended to guarantee your freedom to share and change free software--to
28 make sure the software is free for all its users.
29
30 This license, the Lesser General Public License, applies to some
31 specially designated software packages--typically libraries--of the Free
32 Software Foundation and other authors who decide to use it. You can use
33 it too, but we suggest you first think carefully about whether this
34 license or the ordinary General Public License is the better strategy to
35 use in any particular case, based on the explanations below.
36
37 When we speak of free software, we are referring to freedom of use, not
38 price. Our General Public Licenses are designed to make sure that you
39 have the freedom to distribute copies of free software (and charge for
40 this service if you wish); that you receive source code or can get it if
41 you want it; that you can change the software and use pieces of it in
42 new free programs; and that you are informed that you can do these
43 things.
44
45 To protect your rights, we need to make restrictions that forbid
46 distributors to deny you these rights or to ask you to surrender these
47 rights. These restrictions translate to certain responsibilities for you
48 if you distribute copies of the library or if you modify it.
49
50 For example, if you distribute copies of the library, whether gratis or
51 for a fee, you must give the recipients all the rights that we gave you.
52 You must make sure that they, too, receive or can get the source code.
53 If you link other code with the library, you must provide complete
54 object files to the recipients, so that they can relink them with the
55 library after making changes to the library and recompiling it. And you
56 must show them these terms so they know their rights.
57
58 We protect your rights with a two-step method: (1) we copyright the
59 library, and (2) we offer you this license, which gives you legal
60 permission to copy, distribute and/or modify the library.
61
62 To protect each distributor, we want to make it very clear that there is
63 no warranty for the free library. Also, if the library is modified by
64 someone else and passed on, the recipients should know that what they
65 have is not the original version, so that the original author's
66 reputation will not be affected by problems that might be introduced by
67 others.
68
69 Finally, software patents pose a constant threat to the existence of any
70 free program. We wish to make sure that a company cannot effectively
71 restrict the users of a free program by obtaining a restrictive license
72 from a patent holder. Therefore, we insist that any patent license
73 obtained for a version of the library must be consistent with the full
74 freedom of use specified in this license.
75
76 Most GNU software, including some libraries, is covered by the ordinary
77 GNU General Public License. This license, the GNU Lesser General Public
78 License, applies to certain designated libraries, and is quite different
79 from the ordinary General Public License. We use this license for
80 certain libraries in order to permit linking those libraries into
81 non-free programs.
82
83 When a program is linked with a library, whether statically or using a
84 shared library, the combination of the two is legally speaking a
85 combined work, a derivative of the original library. The ordinary
86 General Public License therefore permits such linking only if the entire
87 combination fits its criteria of freedom. The Lesser General Public
88 License permits more lax criteria for linking other code with the
89 library.
90
91 We call this license the "Lesser" General Public License because it does
92 Less to protect the user's freedom than the ordinary General Public
93 License. It also provides other free software developers Less of an
94 advantage over competing non-free programs. These disadvantages are the
95 reason we use the ordinary General Public License for many libraries.
96 However, the Lesser license provides advantages in certain special
97 circumstances.
98
99 For example, on rare occasions, there may be a special need to encourage
100 the widest possible use of a certain library, so that it becomes a
101 de-facto standard. To achieve this, non-free programs must be allowed to
102 use the library. A more frequent case is that a free library does the
103 same job as widely used non-free libraries. In this case, there is
104 little to gain by limiting the free library to free software only, so we
105 use the Lesser General Public License.
106
107 In other cases, permission to use a particular library in non-free
108 programs enables a greater number of people to use a large body of free
109 software. For example, permission to use the GNU C Library in non-free
110 programs enables many more people to use the whole GNU operating system,
111 as well as its variant, the GNU/Linux operating system.
112
113 Although the Lesser General Public License is Less protective of the
114 users' freedom, it does ensure that the user of a program that is linked
115 with the Library has the freedom and the wherewithal to run that program
116 using a modified version of the Library.
117
118 The precise terms and conditions for copying, distribution and
119 modification follow. Pay close attention to the difference between a
120 "work based on the library" and a "work that uses the library". The
121 former contains code derived from the library, whereas the latter must
122 be combined with the library in order to run.
123
124 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
125
126 0. This License Agreement applies to any software library or other
127 program which contains a notice placed by the copyright holder or other
128 authorized party saying it may be distributed under the terms of this
129 Lesser General Public License (also called "this License"). Each
130 licensee is addressed as "you".
131
132 A "library" means a collection of software functions and/or data
133 prepared so as to be conveniently linked with application programs
134 (which use some of those functions and data) to form executables.
135
136 The "Library", below, refers to any such software library or work which
137 has been distributed under these terms. A "work based on the Library"
138 means either the Library or any derivative work under copyright law:
139 that is to say, a work containing the Library or a portion of it, either
140 verbatim or with modifications and/or translated straightforwardly into
141 another language. (Hereinafter, translation is included without
142 limitation in the term "modification".)
143
144 "Source code" for a work means the preferred form of the work for making
145 modifications to it. For a library, complete source code means all the
146 source code for all modules it contains, plus any associated interface
147 definition files, plus the scripts used to control compilation and
148 installation of the library.
149
150 Activities other than copying, distribution and modification are not
151 covered by this License; they are outside its scope. The act of running
152 a program using the Library is not restricted, and output from such a
153 program is covered only if its contents constitute a work based on the
154 Library (independent of the use of the Library in a tool for writing
155 it). Whether that is true depends on what the Library does and what the
156 program that uses the Library does.
157
158 1. You may copy and distribute verbatim copies of the Library's complete
159 source code as you receive it, in any medium, provided that you
160 conspicuously and appropriately publish on each copy an appropriate
161 copyright notice and disclaimer of warranty; keep intact all the notices
162 that refer to this License and to the absence of any warranty; and
163 distribute a copy of this License along with the Library.
164
165 You may charge a fee for the physical act of transferring a copy, and
166 you may at your option offer warranty protection in exchange for a fee.
167
168 2. You may modify your copy or copies of the Library or any portion of
169 it, thus forming a work based on the Library, and copy and distribute
170 such modifications or work under the terms of Section 1 above, provided
171 that you also meet all of these conditions:
172
173 a) The modified work must itself be a software library.
174 b) You must cause the files modified to carry prominent notices
175 stating that you changed the files and the date of any change.
176 c) You must cause the whole of the work to be licensed at no
177 charge to all third parties under the terms of this License.
178 d) If a facility in the modified Library refers to a function or a
179 table of data to be supplied by an application program that uses
180 the facility, other than as an argument passed when the facility
181 is invoked, then you must make a good faith effort to ensure that,
182 in the event an application does not supply such function or
183 table, the facility still operates, and performs whatever part of
184 its purpose remains meaningful.
185
186 (For example, a function in a library to compute square roots has
187 a purpose that is entirely well-defined independent of the application.
188 Therefore, Subsection 2d requires that any application-supplied function
189 or table used by this function must be optional: if the application does
190 not supply it, the square root function must still compute square
191 roots.)
192
193 These requirements apply to the modified work as a whole. If
194 identifiable sections of that work are not derived from the Library, and
195 can be reasonably considered independent and separate works in
196 themselves, then this License, and its terms, do not apply to those
197 sections when you distribute them as separate works. But when you
198 distribute the same sections as part of a whole which is a work based on
199 the Library, the distribution of the whole must be on the terms of this
200 License, whose permissions for other licensees extend to the entire
201 whole, and thus to each and every part regardless of who wrote it.
202
203 Thus, it is not the intent of this section to claim rights or
204 contest your rights to work written entirely by you; rather, the intent
205 is to exercise the right to control the distribution of derivative or
206 collective works based on the Library.
207
208 In addition, mere aggregation of another work not based on the
209 Library with the Library (or with a work based on the Library) on a
210 volume of a storage or distribution medium does not bring the other work
211 under the scope of this License.
212
213 3. You may opt to apply the terms of the ordinary GNU General Public
214 License instead of this License to a given copy of the Library. To do
215 this, you must alter all the notices that refer to this License, so that
216 they refer to the ordinary GNU General Public License, version 2,
217 instead of to this License. (If a newer version than version 2 of the
218 ordinary GNU General Public License has appeared, then you can specify
219 that version instead if you wish.) Do not make any other change in these
220 notices.
221
222 Once this change is made in a given copy, it is irreversible for that
223 copy, so the ordinary GNU General Public License applies to all
224 subsequent copies and derivative works made from that copy.
225
226 This option is useful when you wish to copy part of the code of the
227 Library into a program that is not a library.
228
229 4. You may copy and distribute the Library (or a portion or derivative
230 of it, under Section 2) in object code or executable form under the
231 terms of Sections 1 and 2 above provided that you accompany it with the
232 complete corresponding machine-readable source code, which must be
233 distributed under the terms of Sections 1 and 2 above on a medium
234 customarily used for software interchange.
235
236 If distribution of object code is made by offering access to copy from a
237 designated place, then offering equivalent access to copy the source
238 code from the same place satisfies the requirement to distribute the
239 source code, even though third parties are not compelled to copy the
240 source along with the object code.
241
242 5. A program that contains no derivative of any portion of the Library,
243 but is designed to work with the Library by being compiled or linked
244 with it, is called a "work that uses the Library". Such a work, in
245 isolation, is not a derivative work of the Library, and therefore falls
246 outside the scope of this License.
247
248 However, linking a "work that uses the Library" with the Library creates
249 an executable that is a derivative of the Library (because it contains
250 portions of the Library), rather than a "work that uses the library".
251 The executable is therefore covered by this License. Section 6 states
252 terms for distribution of such executables.
253
254 When a "work that uses the Library" uses material from a header file
255 that is part of the Library, the object code for the work may be a
256 derivative work of the Library even though the source code is not.
257 Whether this is true is especially significant if the work can be linked
258 without the Library, or if the work is itself a library. The threshold
259 for this to be true is not precisely defined by law.
260
261 If such an object file uses only numerical parameters, data structure
262 layouts and accessors, and small macros and small inline functions (ten
263 lines or less in length), then the use of the object file is
264 unrestricted, regardless of whether it is legally a derivative work.
265 (Executables containing this object code plus portions of the Library
266 will still fall under Section 6.)
267
268 Otherwise, if the work is a derivative of the Library, you may
269 distribute the object code for the work under the terms of Section 6.
270 Any executables containing that work also fall under Section 6, whether
271 or not they are linked directly with the Library itself.
272
273 6. As an exception to the Sections above, you may also combine or link a
274 "work that uses the Library" with the Library to produce a work
275 containing portions of the Library, and distribute that work under terms
276 of your choice, provided that the terms permit modification of the work
277 for the customer's own use and reverse engineering for debugging such
278 modifications.
279
280 You must give prominent notice with each copy of the work that the
281 Library is used in it and that the Library and its use are covered by
282 this License. You must supply a copy of this License. If the work during
283 execution displays copyright notices, you must include the copyright
284 notice for the Library among them, as well as a reference directing the
285 user to the copy of this License. Also, you must do one of these things:
286
287 a) Accompany the work with the complete corresponding
288 machine-readable source code for the Library including whatever
289 changes were used in the work (which must be distributed under
290 Sections 1 and 2 above); and, if the work is an executable linked
291 with the Library, with the complete machine-readable "work that
292 uses the Library", as object code and/or source code, so that the
293 user can modify the Library and then relink to produce a modified
294 executable containing the modified Library. (It is understood that
295 the user who changes the contents of definitions files in the
296 Library will not necessarily be able to recompile the application
297 to use the modified definitions.)
298 b) Use a suitable shared library mechanism for linking with the
299 Library. A suitable mechanism is one that (1) uses at run time a
300 copy of the library already present on the user's computer system,
301 rather than copying library functions into the executable, and (2)
302 will operate properly with a modified version of the library, if
303 the user installs one, as long as the modified version is
304 interface-compatible with the version that the work was made with.
305 c) Accompany the work with a written offer, valid for at least
306 three years, to give the same user the materials specified in
307 Subsection 6a, above, for a charge no more than the cost of
308 performing this distribution.
309 d) If distribution of the work is made by offering access to copy
310 from a designated place, offer equivalent access to copy the above
311 specified materials from the same place.
312 e) Verify that the user has already received a copy of these
313 materials or that you have already sent this user a copy.
314
315 For an executable, the required form of the "work that uses the Library"
316 must include any data and utility programs needed for reproducing the
317 executable from it. However, as a special exception, the materials to be
318 distributed need not include anything that is normally distributed (in
319 either source or binary form) with the major components (compiler,
320 kernel, and so on) of the operating system on which the executable runs,
321 unless that component itself accompanies the executable.
322
323 It may happen that this requirement contradicts the license restrictions
324 of other proprietary libraries that do not normally accompany the
325 operating system. Such a contradiction means you cannot use both them
326 and the Library together in an executable that you distribute.
327
328 7. You may place library facilities that are a work based on the Library
329 side-by-side in a single library together with other library facilities
330 not covered by this License, and distribute such a combined library,
331 provided that the separate distribution of the work based on the Library
332 and of the other library facilities is otherwise permitted, and provided
333 that you do these two things:
334
335 a) Accompany the combined library with a copy of the same work
336 based on the Library, uncombined with any other library
337 facilities. This must be distributed under the terms of the
338 Sections above.
339 b) Give prominent notice with the combined library of the fact
340 that part of it is a work based on the Library, and explaining
341 where to find the accompanying uncombined form of the same work.
342
343 8. You may not copy, modify, sublicense, link with, or distribute the
344 Library except as expressly provided under this License. Any attempt
345 otherwise to copy, modify, sublicense, link with, or distribute the
346 Library is void, and will automatically terminate your rights under this
347 License. However, parties who have received copies, or rights, from you
348 under this License will not have their licenses terminated so long as
349 such parties remain in full compliance.
350
351 9. You are not required to accept this License, since you have not
352 signed it. However, nothing else grants you permission to modify or
353 distribute the Library or its derivative works. These actions are
354 prohibited by law if you do not accept this License. Therefore, by
355 modifying or distributing the Library (or any work based on the
356 Library), you indicate your acceptance of this License to do so, and all
357 its terms and conditions for copying, distributing or modifying the
358 Library or works based on it.
359
360 10. Each time you redistribute the Library (or any work based on the
361 Library), the recipient automatically receives a license from the
362 original licensor to copy, distribute, link with or modify the Library
363 subject to these terms and conditions. You may not impose any further
364 restrictions on the recipients' exercise of the rights granted herein.
365 You are not responsible for enforcing compliance by third parties with
366 this License.
367
368 11. If, as a consequence of a court judgment or allegation of patent
369 infringement or for any other reason (not limited to patent issues),
370 conditions are imposed on you (whether by court order, agreement or
371 otherwise) that contradict the conditions of this License, they do not
372 excuse you from the conditions of this License. If you cannot distribute
373 so as to satisfy simultaneously your obligations under this License and
374 any other pertinent obligations, then as a consequence you may not
375 distribute the Library at all. For example, if a patent license would
376 not permit royalty-free redistribution of the Library by all those who
377 receive copies directly or indirectly through you, then the only way you
378 could satisfy both it and this License would be to refrain entirely from
379 distribution of the Library.
380
381 If any portion of this section is held invalid or unenforceable under
382 any particular circumstance, the balance of the section is intended to
383 apply, and the section as a whole is intended to apply in other
384 circumstances.
385
386 It is not the purpose of this section to induce you to infringe any
387 patents or other property right claims or to contest validity of any
388 such claims; this section has the sole purpose of protecting the
389 integrity of the free software distribution system which is implemented
390 by public license practices. Many people have made generous
391 contributions to the wide range of software distributed through that
392 system in reliance on consistent application of that system; it is up to
393 the author/donor to decide if he or she is willing to distribute
394 software through any other system and a licensee cannot impose that
395 choice.
396
397 This section is intended to make thoroughly clear what is believed to be
398 a consequence of the rest of this License.
399
400 12. If the distribution and/or use of the Library is restricted in
401 certain countries either by patents or by copyrighted interfaces, the
402 original copyright holder who places the Library under this License may
403 add an explicit geographical distribution limitation excluding those
404 countries, so that distribution is permitted only in or among countries
405 not thus excluded. In such case, this License incorporates the
406 limitation as if written in the body of this License.
407
408 13. The Free Software Foundation may publish revised and/or new versions
409 of the Lesser General Public License from time to time. Such new
410 versions will be similar in spirit to the present version, but may
411 differ in detail to address new problems or concerns.
412
413 Each version is given a distinguishing version number. If the Library
414 specifies a version number of this License which applies to it and "any
415 later version", you have the option of following the terms and
416 conditions either of that version or of any later version published by
417 the Free Software Foundation. If the Library does not specify a license
418 version number, you may choose any version ever published by the Free
419 Software Foundation.
420
421 14. If you wish to incorporate parts of the Library into other free
422 programs whose distribution conditions are incompatible with these,
423 write to the author to ask for permission. For software which is
424 copyrighted by the Free Software Foundation, write to the Free Software
425 Foundation; we sometimes make exceptions for this. Our decision will be
426 guided by the two goals of preserving the free status of all derivatives
427 of our free software and of promoting the sharing and reuse of software
428 generally.
429
430 NO WARRANTY
431
432 15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
433 FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
434 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
435 PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
436 EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
437 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
438 ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE LIBRARY IS WITH
439 YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
440 NECESSARY SERVICING, REPAIR OR CORRECTION.
441
442 16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
443 WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
444 AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU FOR
445 DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL
446 DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE LIBRARY
447 (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED
448 INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF
449 THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF SUCH HOLDER OR
450 OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

mercurial