1 GNU LESSER GENERAL PUBLIC LICENSE
3 The Qt GUI Toolkit is Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
4 Contact: Nokia Corporation (qt-info@nokia.com)
6 You may use, distribute and copy the Qt GUI Toolkit under the terms of
7 GNU Lesser General Public License version 2.1, which is displayed below.
9 -------------------------------------------------------------------------
11 GNU LESSER GENERAL PUBLIC LICENSE
12 Version 2.1, February 1999
14 Copyright (C) 1991, 1999 Free Software Foundation, Inc.
15 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
16 Everyone is permitted to copy and distribute verbatim copies
17 of this license document, but changing it is not allowed.
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
21 the version number 2.1.]
25 The licenses for most software are designed to take away your
26 freedom to share and change it. By contrast, the GNU General Public
27 Licenses are intended to guarantee your freedom to share and change
28 free software--to make sure the software is free for all its users.
30 This license, the Lesser General Public License, applies to some
31 specially designated software packages--typically libraries--of the
32 Free Software Foundation and other authors who decide to use it. You
33 can use it too, but we suggest you first think carefully about whether
34 this license or the ordinary General Public License is the better
35 strategy to use in any particular case, based on the explanations below.
37 When we speak of free software, we are referring to freedom of use,
38 not price. Our General Public Licenses are designed to make sure that
39 you have the freedom to distribute copies of free software (and charge
40 for this service if you wish); that you receive source code or can get
41 it if you want it; that you can change the software and use pieces of
42 it in new free programs; and that you are informed that you can do
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
48 you if you distribute copies of the library or if you modify it.
50 For example, if you distribute copies of the library, whether gratis
51 or for a fee, you must give the recipients all the rights that we gave
52 you. You must make sure that they, too, receive or can get the source
53 code. If you link other code with the library, you must provide
54 complete object files to the recipients, so that they can relink them
55 with the library after making changes to the library and recompiling
56 it. And you must show them these terms so they know their rights.
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.
62 To protect each distributor, we want to make it very clear that
63 there is no warranty for the free library. Also, if the library is
64 modified by someone else and passed on, the recipients should know
65 that what they have is not the original version, so that the original
66 author's reputation will not be affected by problems that might be
69 Finally, software patents pose a constant threat to the existence of
70 any free program. We wish to make sure that a company cannot
71 effectively restrict the users of a free program by obtaining a
72 restrictive license from a patent holder. Therefore, we insist that
73 any patent license obtained for a version of the library must be
74 consistent with the full freedom of use specified in this license.
76 Most GNU software, including some libraries, is covered by the
77 ordinary GNU General Public License. This license, the GNU Lesser
78 General Public License, applies to certain designated libraries, and
79 is quite different from the ordinary General Public License. We use
80 this license for certain libraries in order to permit linking those
81 libraries into non-free programs.
83 When a program is linked with a library, whether statically or using
84 a 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
87 entire combination fits its criteria of freedom. The Lesser General
88 Public License permits more lax criteria for linking other code with
91 We call this license the "Lesser" General Public License because it
92 does Less to protect the user's freedom than the ordinary General
93 Public License. It also provides other free software developers Less
94 of an advantage over competing non-free programs. These disadvantages
95 are the reason we use the ordinary General Public License for many
96 libraries. However, the Lesser license provides advantages in certain
97 special circumstances.
99 For example, on rare occasions, there may be a special need to
100 encourage the widest possible use of a certain library, so that it becomes
101 a de-facto standard. To achieve this, non-free programs must be
102 allowed to use the library. A more frequent case is that a free
103 library does the same job as widely used non-free libraries. In this
104 case, there is little to gain by limiting the free library to free
105 software only, so we use the Lesser General Public License.
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
109 free software. For example, permission to use the GNU C Library in
110 non-free programs enables many more people to use the whole GNU
111 operating system, as well as its variant, the GNU/Linux operating
114 Although the Lesser General Public License is Less protective of the
115 users' freedom, it does ensure that the user of a program that is
116 linked with the Library has the freedom and the wherewithal to run
117 that program using a modified version of the Library.
119 The precise terms and conditions for copying, distribution and
120 modification follow. Pay close attention to the difference between a
121 "work based on the library" and a "work that uses the library". The
122 former contains code derived from the library, whereas the latter must
123 be combined with the library in order to run.
125 GNU LESSER GENERAL PUBLIC LICENSE
126 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
128 0. This License Agreement applies to any software library or other
129 program which contains a notice placed by the copyright holder or
130 other authorized party saying it may be distributed under the terms of
131 this Lesser General Public License (also called "this License").
132 Each licensee is addressed as "you".
134 A "library" means a collection of software functions and/or data
135 prepared so as to be conveniently linked with application programs
136 (which use some of those functions and data) to form executables.
138 The "Library", below, refers to any such software library or work
139 which has been distributed under these terms. A "work based on the
140 Library" means either the Library or any derivative work under
141 copyright law: that is to say, a work containing the Library or a
142 portion of it, either verbatim or with modifications and/or translated
143 straightforwardly into another language. (Hereinafter, translation is
144 included without limitation in the term "modification".)
146 "Source code" for a work means the preferred form of the work for
147 making modifications to it. For a library, complete source code means
148 all the source code for all modules it contains, plus any associated
149 interface definition files, plus the scripts used to control compilation
150 and installation of the library.
152 Activities other than copying, distribution and modification are not
153 covered by this License; they are outside its scope. The act of
154 running a program using the Library is not restricted, and output from
155 such a program is covered only if its contents constitute a work based
156 on the Library (independent of the use of the Library in a tool for
157 writing it). Whether that is true depends on what the Library does
158 and what the program that uses the Library does.
160 1. You may copy and distribute verbatim copies of the Library's
161 complete source code as you receive it, in any medium, provided that
162 you conspicuously and appropriately publish on each copy an
163 appropriate copyright notice and disclaimer of warranty; keep intact
164 all the notices that refer to this License and to the absence of any
165 warranty; and distribute a copy of this License along with the
168 You may charge a fee for the physical act of transferring a copy,
169 and you may at your option offer warranty protection in exchange for a
172 2. You may modify your copy or copies of the Library or any portion
173 of it, thus forming a work based on the Library, and copy and
174 distribute such modifications or work under the terms of Section 1
175 above, provided that you also meet all of these conditions:
177 a) The modified work must itself be a software library.
179 b) You must cause the files modified to carry prominent notices
180 stating that you changed the files and the date of any change.
182 c) You must cause the whole of the work to be licensed at no
183 charge to all third parties under the terms of this License.
185 d) If a facility in the modified Library refers to a function or a
186 table of data to be supplied by an application program that uses
187 the facility, other than as an argument passed when the facility
188 is invoked, then you must make a good faith effort to ensure that,
189 in the event an application does not supply such function or
190 table, the facility still operates, and performs whatever part of
191 its purpose remains meaningful.
193 (For example, a function in a library to compute square roots has
194 a purpose that is entirely well-defined independent of the
195 application. Therefore, Subsection 2d requires that any
196 application-supplied function or table used by this function must
197 be optional: if the application does not supply it, the square
198 root function must still compute square roots.)
200 These requirements apply to the modified work as a whole. If
201 identifiable sections of that work are not derived from the Library,
202 and can be reasonably considered independent and separate works in
203 themselves, then this License, and its terms, do not apply to those
204 sections when you distribute them as separate works. But when you
205 distribute the same sections as part of a whole which is a work based
206 on the Library, the distribution of the whole must be on the terms of
207 this License, whose permissions for other licensees extend to the
208 entire whole, and thus to each and every part regardless of who wrote
211 Thus, it is not the intent of this section to claim rights or contest
212 your rights to work written entirely by you; rather, the intent is to
213 exercise the right to control the distribution of derivative or
214 collective works based on the Library.
216 In addition, mere aggregation of another work not based on the Library
217 with the Library (or with a work based on the Library) on a volume of
218 a storage or distribution medium does not bring the other work under
219 the scope of this License.
221 3. You may opt to apply the terms of the ordinary GNU General Public
222 License instead of this License to a given copy of the Library. To do
223 this, you must alter all the notices that refer to this License, so
224 that they refer to the ordinary GNU General Public License, version 2,
225 instead of to this License. (If a newer version than version 2 of the
226 ordinary GNU General Public License has appeared, then you can specify
227 that version instead if you wish.) Do not make any other change in
230 Once this change is made in a given copy, it is irreversible for
231 that copy, so the ordinary GNU General Public License applies to all
232 subsequent copies and derivative works made from that copy.
234 This option is useful when you wish to copy part of the code of
235 the Library into a program that is not a library.
237 4. You may copy and distribute the Library (or a portion or
238 derivative of it, under Section 2) in object code or executable form
239 under the terms of Sections 1 and 2 above provided that you accompany
240 it with the complete corresponding machine-readable source code, which
241 must be distributed under the terms of Sections 1 and 2 above on a
242 medium customarily used for software interchange.
244 If distribution of object code is made by offering access to copy
245 from a designated place, then offering equivalent access to copy the
246 source code from the same place satisfies the requirement to
247 distribute the source code, even though third parties are not
248 compelled to copy the source along with the object code.
250 5. A program that contains no derivative of any portion of the
251 Library, but is designed to work with the Library by being compiled or
252 linked with it, is called a "work that uses the Library". Such a
253 work, in isolation, is not a derivative work of the Library, and
254 therefore falls outside the scope of this License.
256 However, linking a "work that uses the Library" with the Library
257 creates an executable that is a derivative of the Library (because it
258 contains portions of the Library), rather than a "work that uses the
259 library". The executable is therefore covered by this License.
260 Section 6 states terms for distribution of such executables.
262 When a "work that uses the Library" uses material from a header file
263 that is part of the Library, the object code for the work may be a
264 derivative work of the Library even though the source code is not.
265 Whether this is true is especially significant if the work can be
266 linked without the Library, or if the work is itself a library. The
267 threshold for this to be true is not precisely defined by law.
269 If such an object file uses only numerical parameters, data
270 structure layouts and accessors, and small macros and small inline
271 functions (ten lines or less in length), then the use of the object
272 file is unrestricted, regardless of whether it is legally a derivative
273 work. (Executables containing this object code plus portions of the
274 Library will still fall under Section 6.)
276 Otherwise, if the work is a derivative of the Library, you may
277 distribute the object code for the work under the terms of Section 6.
278 Any executables containing that work also fall under Section 6,
279 whether or not they are linked directly with the Library itself.
281 6. As an exception to the Sections above, you may also combine or
282 link a "work that uses the Library" with the Library to produce a
283 work containing portions of the Library, and distribute that work
284 under terms of your choice, provided that the terms permit
285 modification of the work for the customer's own use and reverse
286 engineering for debugging such modifications.
288 You must give prominent notice with each copy of the work that the
289 Library is used in it and that the Library and its use are covered by
290 this License. You must supply a copy of this License. If the work
291 during execution displays copyright notices, you must include the
292 copyright notice for the Library among them, as well as a reference
293 directing the user to the copy of this License. Also, you must do one
296 a) Accompany the work with the complete corresponding
297 machine-readable source code for the Library including whatever
298 changes were used in the work (which must be distributed under
299 Sections 1 and 2 above); and, if the work is an executable linked
300 with the Library, with the complete machine-readable "work that
301 uses the Library", as object code and/or source code, so that the
302 user can modify the Library and then relink to produce a modified
303 executable containing the modified Library. (It is understood
304 that the user who changes the contents of definitions files in the
305 Library will not necessarily be able to recompile the application
306 to use the modified definitions.)
308 b) Use a suitable shared library mechanism for linking with the
309 Library. A suitable mechanism is one that (1) uses at run time a
310 copy of the library already present on the user's computer system,
311 rather than copying library functions into the executable, and (2)
312 will operate properly with a modified version of the library, if
313 the user installs one, as long as the modified version is
314 interface-compatible with the version that the work was made with.
316 c) Accompany the work with a written offer, valid for at
317 least three years, to give the same user the materials
318 specified in Subsection 6a, above, for a charge no more
319 than the cost of performing this distribution.
321 d) If distribution of the work is made by offering access to copy
322 from a designated place, offer equivalent access to copy the above
323 specified materials from the same place.
325 e) Verify that the user has already received a copy of these
326 materials or that you have already sent this user a copy.
328 For an executable, the required form of the "work that uses the
329 Library" must include any data and utility programs needed for
330 reproducing the executable from it. However, as a special exception,
331 the materials to be distributed need not include anything that is
332 normally distributed (in either source or binary form) with the major
333 components (compiler, kernel, and so on) of the operating system on
334 which the executable runs, unless that component itself accompanies
337 It may happen that this requirement contradicts the license
338 restrictions of other proprietary libraries that do not normally
339 accompany the operating system. Such a contradiction means you cannot
340 use both them and the Library together in an executable that you
343 7. You may place library facilities that are a work based on the
344 Library side-by-side in a single library together with other library
345 facilities not covered by this License, and distribute such a combined
346 library, provided that the separate distribution of the work based on
347 the Library and of the other library facilities is otherwise
348 permitted, and provided that you do these two things:
350 a) Accompany the combined library with a copy of the same work
351 based on the Library, uncombined with any other library
352 facilities. This must be distributed under the terms of the
355 b) Give prominent notice with the combined library of the fact
356 that part of it is a work based on the Library, and explaining
357 where to find the accompanying uncombined form of the same work.
359 8. You may not copy, modify, sublicense, link with, or distribute
360 the Library except as expressly provided under this License. Any
361 attempt otherwise to copy, modify, sublicense, link with, or
362 distribute the Library is void, and will automatically terminate your
363 rights under this License. However, parties who have received copies,
364 or rights, from you under this License will not have their licenses
365 terminated so long as such parties remain in full compliance.
367 9. You are not required to accept this License, since you have not
368 signed it. However, nothing else grants you permission to modify or
369 distribute the Library or its derivative works. These actions are
370 prohibited by law if you do not accept this License. Therefore, by
371 modifying or distributing the Library (or any work based on the
372 Library), you indicate your acceptance of this License to do so, and
373 all its terms and conditions for copying, distributing or modifying
374 the Library or works based on it.
376 10. Each time you redistribute the Library (or any work based on the
377 Library), the recipient automatically receives a license from the
378 original licensor to copy, distribute, link with or modify the Library
379 subject to these terms and conditions. You may not impose any further
380 restrictions on the recipients' exercise of the rights granted herein.
381 You are not responsible for enforcing compliance by third parties with
384 11. If, as a consequence of a court judgment or allegation of patent
385 infringement or for any other reason (not limited to patent issues),
386 conditions are imposed on you (whether by court order, agreement or
387 otherwise) that contradict the conditions of this License, they do not
388 excuse you from the conditions of this License. If you cannot
389 distribute so as to satisfy simultaneously your obligations under this
390 License and any other pertinent obligations, then as a consequence you
391 may not distribute the Library at all. For example, if a patent
392 license would not permit royalty-free redistribution of the Library by
393 all those who receive copies directly or indirectly through you, then
394 the only way you could satisfy both it and this License would be to
395 refrain entirely from distribution of the Library.
397 If any portion of this section is held invalid or unenforceable under any
398 particular circumstance, the balance of the section is intended to apply,
399 and the section as a whole is intended to apply in other circumstances.
401 It is not the purpose of this section to induce you to infringe any
402 patents or other property right claims or to contest validity of any
403 such claims; this section has the sole purpose of protecting the
404 integrity of the free software distribution system which is
405 implemented by public license practices. Many people have made
406 generous contributions to the wide range of software distributed
407 through that system in reliance on consistent application of that
408 system; it is up to the author/donor to decide if he or she is willing
409 to distribute software through any other system and a licensee cannot
412 This section is intended to make thoroughly clear what is believed to
413 be a consequence of the rest of this License.
415 12. If the distribution and/or use of the Library is restricted in
416 certain countries either by patents or by copyrighted interfaces, the
417 original copyright holder who places the Library under this License may add
418 an explicit geographical distribution limitation excluding those countries,
419 so that distribution is permitted only in or among countries not thus
420 excluded. In such case, this License incorporates the limitation as if
421 written in the body of this License.
423 13. The Free Software Foundation may publish revised and/or new
424 versions of the Lesser General Public License from time to time.
425 Such new versions will be similar in spirit to the present version,
426 but may differ in detail to address new problems or concerns.
428 Each version is given a distinguishing version number. If the Library
429 specifies a version number of this License which applies to it and
430 "any later version", you have the option of following the terms and
431 conditions either of that version or of any later version published by
432 the Free Software Foundation. If the Library does not specify a
433 license version number, you may choose any version ever published by
434 the Free Software Foundation.
436 14. If you wish to incorporate parts of the Library into other free
437 programs whose distribution conditions are incompatible with these,
438 write to the author to ask for permission. For software which is
439 copyrighted by the Free Software Foundation, write to the Free
440 Software Foundation; we sometimes make exceptions for this. Our
441 decision will be guided by the two goals of preserving the free status
442 of all derivatives of our free software and of promoting the sharing
443 and reuse of software generally.
447 15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
448 WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
449 EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
450 OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
451 KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
452 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
453 PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
454 LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
455 THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
457 16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
458 WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
459 AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
460 FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
461 CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
462 LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
463 RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
464 FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
465 SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
468 END OF TERMS AND CONDITIONS
470 How to Apply These Terms to Your New Libraries
472 If you develop a new library, and you want it to be of the greatest
473 possible use to the public, we recommend making it free software that
474 everyone can redistribute and change. You can do so by permitting
475 redistribution under these terms (or, alternatively, under the terms of the
476 ordinary General Public License).
478 To apply these terms, attach the following notices to the library. It is
479 safest to attach them to the start of each source file to most effectively
480 convey the exclusion of warranty; and each file should have at least the
481 "copyright" line and a pointer to where the full notice is found.
483 <one line to give the library's name and a brief idea of what it does.>
484 Copyright (C) <year> <name of author>
486 This library is free software; you can redistribute it and/or
487 modify it under the terms of the GNU Lesser General Public
488 License as published by the Free Software Foundation; either
489 version 2.1 of the License, or (at your option) any later version.
491 This library is distributed in the hope that it will be useful,
492 but WITHOUT ANY WARRANTY; without even the implied warranty of
493 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
494 Lesser General Public License for more details.
496 You should have received a copy of the GNU Lesser General Public
497 License along with this library; if not, write to the Free Software
498 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
500 Also add information on how to contact you by electronic and paper mail.
502 You should also get your employer (if you work as a programmer) or your
503 school, if any, to sign a "copyright disclaimer" for the library, if
504 necessary. Here is a sample; alter the names:
506 Yoyodyne, Inc., hereby disclaims all copyright interest in the
507 library `Frob' (a library for tweaking knobs) written by James Random Hacker.
509 <signature of Ty Coon>, 1 April 1990
510 Ty Coon, President of Vice
512 That's all there is to it!