xref: /openbmc/u-boot/Licenses/lgpl-2.0.txt (revision 90c08fa0)
1                  GNU LIBRARY GENERAL PUBLIC LICENSE
2                       Version 2, June 1991
3
4 Copyright (C) 1991 Free Software Foundation, Inc.
5 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
6 Everyone is permitted to copy and distribute verbatim copies
7 of this license document, but changing it is not allowed.
8
9[This is the first released version of the library GPL.  It is
10 numbered 2 because it goes with version 2 of the ordinary GPL.]
11
12                            Preamble
13
14  The licenses for most software are designed to take away your
15freedom to share and change it.  By contrast, the GNU General Public
16Licenses are intended to guarantee your freedom to share and change
17free software--to make sure the software is free for all its users.
18
19  This license, the Library General Public License, applies to some
20specially designated Free Software Foundation software, and to any
21other libraries whose authors decide to use it.  You can use it for
22your libraries, too.
23
24  When we speak of free software, we are referring to freedom, not
25price.  Our General Public Licenses are designed to make sure that you
26have the freedom to distribute copies of free software (and charge for
27this service if you wish), that you receive source code or can get it
28if you want it, that you can change the software or use pieces of it
29in new free programs; and that you know you can do these things.
30
31  To protect your rights, we need to make restrictions that forbid
32anyone to deny you these rights or to ask you to surrender the rights.
33These restrictions translate to certain responsibilities for you if
34you distribute copies of the library, or if you modify it.
35
36  For example, if you distribute copies of the library, whether gratis
37or for a fee, you must give the recipients all the rights that we gave
38you.  You must make sure that they, too, receive or can get the source
39code.  If you link a program with the library, you must provide
40complete object files to the recipients so that they can relink them
41with the library, after making changes to the library and recompiling
42it.  And you must show them these terms so they know their rights.
43
44  Our method of protecting your rights has two steps: (1) copyright
45the library, and (2) offer you this license which gives you legal
46permission to copy, distribute and/or modify the library.
47
48  Also, for each distributor's protection, we want to make certain
49that everyone understands that there is no warranty for this free
50library.  If the library is modified by someone else and passed on, we
51want its recipients to know that what they have is not the original
52version, so that any problems introduced by others will not reflect on
53the original authors' reputations.
54
55  Finally, any free program is threatened constantly by software
56patents.  We wish to avoid the danger that companies distributing free
57software will individually obtain patent licenses, thus in effect
58transforming the program into proprietary software.  To prevent this,
59we have made it clear that any patent must be licensed for everyone's
60free use or not licensed at all.
61
62  Most GNU software, including some libraries, is covered by the ordinary
63GNU General Public License, which was designed for utility programs.  This
64license, the GNU Library General Public License, applies to certain
65designated libraries.  This license is quite different from the ordinary
66one; be sure to read it in full, and don't assume that anything in it is
67the same as in the ordinary license.
68
69  The reason we have a separate public license for some libraries is that
70they blur the distinction we usually make between modifying or adding to a
71program and simply using it.  Linking a program with a library, without
72changing the library, is in some sense simply using the library, and is
73analogous to running a utility program or application program.  However, in
74a textual and legal sense, the linked executable is a combined work, a
75derivative of the original library, and the ordinary General Public License
76treats it as such.
77
78  Because of this blurred distinction, using the ordinary General
79Public License for libraries did not effectively promote software
80sharing, because most developers did not use the libraries.  We
81concluded that weaker conditions might promote sharing better.
82
83  However, unrestricted linking of non-free programs would deprive the
84users of those programs of all benefit from the free status of the
85libraries themselves.  This Library General Public License is intended to
86permit developers of non-free programs to use free libraries, while
87preserving your freedom as a user of such programs to change the free
88libraries that are incorporated in them.  (We have not seen how to achieve
89this as regards changes in header files, but we have achieved it as regards
90changes in the actual functions of the Library.)  The hope is that this
91will lead to faster development of free libraries.
92
93  The precise terms and conditions for copying, distribution and
94modification follow.  Pay close attention to the difference between a
95"work based on the library" and a "work that uses the library".  The
96former contains code derived from the library, while the latter only
97works together with the library.
98
99  Note that it is possible for a library to be covered by the ordinary
100General Public License rather than by this special one.
101
102                  GNU LIBRARY GENERAL PUBLIC LICENSE
103   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
104
105  0. This License Agreement applies to any software library which
106contains a notice placed by the copyright holder or other authorized
107party saying it may be distributed under the terms of this Library
108General Public License (also called "this License").  Each licensee is
109addressed as "you".
110
111  A "library" means a collection of software functions and/or data
112prepared so as to be conveniently linked with application programs
113(which use some of those functions and data) to form executables.
114
115  The "Library", below, refers to any such software library or work
116which has been distributed under these terms.  A "work based on the
117Library" means either the Library or any derivative work under
118copyright law: that is to say, a work containing the Library or a
119portion of it, either verbatim or with modifications and/or translated
120straightforwardly into another language.  (Hereinafter, translation is
121included without limitation in the term "modification".)
122
123  "Source code" for a work means the preferred form of the work for
124making modifications to it.  For a library, complete source code means
125all the source code for all modules it contains, plus any associated
126interface definition files, plus the scripts used to control compilation
127and installation of the library.
128
129  Activities other than copying, distribution and modification are not
130covered by this License; they are outside its scope.  The act of
131running a program using the Library is not restricted, and output from
132such a program is covered only if its contents constitute a work based
133on the Library (independent of the use of the Library in a tool for
134writing it).  Whether that is true depends on what the Library does
135and what the program that uses the Library does.
136
137  1. You may copy and distribute verbatim copies of the Library's
138complete source code as you receive it, in any medium, provided that
139you conspicuously and appropriately publish on each copy an
140appropriate copyright notice and disclaimer of warranty; keep intact
141all the notices that refer to this License and to the absence of any
142warranty; and distribute a copy of this License along with the
143Library.
144
145  You may charge a fee for the physical act of transferring a copy,
146and you may at your option offer warranty protection in exchange for a
147fee.
148
149  2. You may modify your copy or copies of the Library or any portion
150of it, thus forming a work based on the Library, and copy and
151distribute such modifications or work under the terms of Section 1
152above, provided that you also meet all of these conditions:
153
154    a) The modified work must itself be a software library.
155
156    b) You must cause the files modified to carry prominent notices
157    stating that you changed the files and the date of any change.
158
159    c) You must cause the whole of the work to be licensed at no
160    charge to all third parties under the terms of this License.
161
162    d) If a facility in the modified Library refers to a function or a
163    table of data to be supplied by an application program that uses
164    the facility, other than as an argument passed when the facility
165    is invoked, then you must make a good faith effort to ensure that,
166    in the event an application does not supply such function or
167    table, the facility still operates, and performs whatever part of
168    its purpose remains meaningful.
169
170    (For example, a function in a library to compute square roots has
171    a purpose that is entirely well-defined independent of the
172    application.  Therefore, Subsection 2d requires that any
173    application-supplied function or table used by this function must
174    be optional: if the application does not supply it, the square
175    root function must still compute square roots.)
176
177These requirements apply to the modified work as a whole.  If
178identifiable sections of that work are not derived from the Library,
179and can be reasonably considered independent and separate works in
180themselves, then this License, and its terms, do not apply to those
181sections when you distribute them as separate works.  But when you
182distribute the same sections as part of a whole which is a work based
183on the Library, the distribution of the whole must be on the terms of
184this License, whose permissions for other licensees extend to the
185entire whole, and thus to each and every part regardless of who wrote
186it.
187
188Thus, it is not the intent of this section to claim rights or contest
189your rights to work written entirely by you; rather, the intent is to
190exercise the right to control the distribution of derivative or
191collective works based on the Library.
192
193In addition, mere aggregation of another work not based on the Library
194with the Library (or with a work based on the Library) on a volume of
195a storage or distribution medium does not bring the other work under
196the scope of this License.
197
198  3. You may opt to apply the terms of the ordinary GNU General Public
199License instead of this License to a given copy of the Library.  To do
200this, you must alter all the notices that refer to this License, so
201that they refer to the ordinary GNU General Public License, version 2,
202instead of to this License.  (If a newer version than version 2 of the
203ordinary GNU General Public License has appeared, then you can specify
204that version instead if you wish.)  Do not make any other change in
205these notices.
206
207  Once this change is made in a given copy, it is irreversible for
208that copy, so the ordinary GNU General Public License applies to all
209subsequent copies and derivative works made from that copy.
210
211  This option is useful when you wish to copy part of the code of
212the Library into a program that is not a library.
213
214  4. You may copy and distribute the Library (or a portion or
215derivative of it, under Section 2) in object code or executable form
216under the terms of Sections 1 and 2 above provided that you accompany
217it with the complete corresponding machine-readable source code, which
218must be distributed under the terms of Sections 1 and 2 above on a
219medium customarily used for software interchange.
220
221  If distribution of object code is made by offering access to copy
222from a designated place, then offering equivalent access to copy the
223source code from the same place satisfies the requirement to
224distribute the source code, even though third parties are not
225compelled to copy the source along with the object code.
226
227  5. A program that contains no derivative of any portion of the
228Library, but is designed to work with the Library by being compiled or
229linked with it, is called a "work that uses the Library".  Such a
230work, in isolation, is not a derivative work of the Library, and
231therefore falls outside the scope of this License.
232
233  However, linking a "work that uses the Library" with the Library
234creates an executable that is a derivative of the Library (because it
235contains portions of the Library), rather than a "work that uses the
236library".  The executable is therefore covered by this License.
237Section 6 states terms for distribution of such executables.
238
239  When a "work that uses the Library" uses material from a header file
240that is part of the Library, the object code for the work may be a
241derivative work of the Library even though the source code is not.
242Whether this is true is especially significant if the work can be
243linked without the Library, or if the work is itself a library.  The
244threshold for this to be true is not precisely defined by law.
245
246  If such an object file uses only numerical parameters, data
247structure layouts and accessors, and small macros and small inline
248functions (ten lines or less in length), then the use of the object
249file is unrestricted, regardless of whether it is legally a derivative
250work.  (Executables containing this object code plus portions of the
251Library will still fall under Section 6.)
252
253  Otherwise, if the work is a derivative of the Library, you may
254distribute the object code for the work under the terms of Section 6.
255Any executables containing that work also fall under Section 6,
256whether or not they are linked directly with the Library itself.
257
258  6. As an exception to the Sections above, you may also compile or
259link a "work that uses the Library" with the Library to produce a
260work containing portions of the Library, and distribute that work
261under terms of your choice, provided that the terms permit
262modification of the work for the customer's own use and reverse
263engineering for debugging such modifications.
264
265  You must give prominent notice with each copy of the work that the
266Library is used in it and that the Library and its use are covered by
267this License.  You must supply a copy of this License.  If the work
268during execution displays copyright notices, you must include the
269copyright notice for the Library among them, as well as a reference
270directing the user to the copy of this License.  Also, you must do one
271of these things:
272
273    a) Accompany the work with the complete corresponding
274    machine-readable source code for the Library including whatever
275    changes were used in the work (which must be distributed under
276    Sections 1 and 2 above); and, if the work is an executable linked
277    with the Library, with the complete machine-readable "work that
278    uses the Library", as object code and/or source code, so that the
279    user can modify the Library and then relink to produce a modified
280    executable containing the modified Library.  (It is understood
281    that the user who changes the contents of definitions files in the
282    Library will not necessarily be able to recompile the application
283    to use the modified definitions.)
284
285    b) Accompany the work with a written offer, valid for at
286    least three years, to give the same user the materials
287    specified in Subsection 6a, above, for a charge no more
288    than the cost of performing this distribution.
289
290    c) If distribution of the work is made by offering access to copy
291    from a designated place, offer equivalent access to copy the above
292    specified materials from the same place.
293
294    d) Verify that the user has already received a copy of these
295    materials or that you have already sent this user a copy.
296
297  For an executable, the required form of the "work that uses the
298Library" must include any data and utility programs needed for
299reproducing the executable from it.  However, as a special exception,
300the source code distributed need not include anything that is normally
301distributed (in either source or binary form) with the major
302components (compiler, kernel, and so on) of the operating system on
303which the executable runs, unless that component itself accompanies
304the executable.
305
306  It may happen that this requirement contradicts the license
307restrictions of other proprietary libraries that do not normally
308accompany the operating system.  Such a contradiction means you cannot
309use both them and the Library together in an executable that you
310distribute.
311
312  7. You may place library facilities that are a work based on the
313Library side-by-side in a single library together with other library
314facilities not covered by this License, and distribute such a combined
315library, provided that the separate distribution of the work based on
316the Library and of the other library facilities is otherwise
317permitted, and provided that you do these two things:
318
319    a) Accompany the combined library with a copy of the same work
320    based on the Library, uncombined with any other library
321    facilities.  This must be distributed under the terms of the
322    Sections above.
323
324    b) Give prominent notice with the combined library of the fact
325    that part of it is a work based on the Library, and explaining
326    where to find the accompanying uncombined form of the same work.
327
328  8. You may not copy, modify, sublicense, link with, or distribute
329the Library except as expressly provided under this License.  Any
330attempt otherwise to copy, modify, sublicense, link with, or
331distribute the Library is void, and will automatically terminate your
332rights under this License.  However, parties who have received copies,
333or rights, from you under this License will not have their licenses
334terminated so long as such parties remain in full compliance.
335
336  9. You are not required to accept this License, since you have not
337signed it.  However, nothing else grants you permission to modify or
338distribute the Library or its derivative works.  These actions are
339prohibited by law if you do not accept this License.  Therefore, by
340modifying or distributing the Library (or any work based on the
341Library), you indicate your acceptance of this License to do so, and
342all its terms and conditions for copying, distributing or modifying
343the Library or works based on it.
344
345  10. Each time you redistribute the Library (or any work based on the
346Library), the recipient automatically receives a license from the
347original licensor to copy, distribute, link with or modify the Library
348subject to these terms and conditions.  You may not impose any further
349restrictions on the recipients' exercise of the rights granted herein.
350You are not responsible for enforcing compliance by third parties to
351this License.
352
353  11. If, as a consequence of a court judgment or allegation of patent
354infringement or for any other reason (not limited to patent issues),
355conditions are imposed on you (whether by court order, agreement or
356otherwise) that contradict the conditions of this License, they do not
357excuse you from the conditions of this License.  If you cannot
358distribute so as to satisfy simultaneously your obligations under this
359License and any other pertinent obligations, then as a consequence you
360may not distribute the Library at all.  For example, if a patent
361license would not permit royalty-free redistribution of the Library by
362all those who receive copies directly or indirectly through you, then
363the only way you could satisfy both it and this License would be to
364refrain entirely from distribution of the Library.
365
366If any portion of this section is held invalid or unenforceable under any
367particular circumstance, the balance of the section is intended to apply,
368and the section as a whole is intended to apply in other circumstances.
369
370It is not the purpose of this section to induce you to infringe any
371patents or other property right claims or to contest validity of any
372such claims; this section has the sole purpose of protecting the
373integrity of the free software distribution system which is
374implemented by public license practices.  Many people have made
375generous contributions to the wide range of software distributed
376through that system in reliance on consistent application of that
377system; it is up to the author/donor to decide if he or she is willing
378to distribute software through any other system and a licensee cannot
379impose that choice.
380
381This section is intended to make thoroughly clear what is believed to
382be a consequence of the rest of this License.
383
384  12. If the distribution and/or use of the Library is restricted in
385certain countries either by patents or by copyrighted interfaces, the
386original copyright holder who places the Library under this License may add
387an explicit geographical distribution limitation excluding those countries,
388so that distribution is permitted only in or among countries not thus
389excluded.  In such case, this License incorporates the limitation as if
390written in the body of this License.
391
392  13. The Free Software Foundation may publish revised and/or new
393versions of the Library General Public License from time to time.
394Such new versions will be similar in spirit to the present version,
395but may differ in detail to address new problems or concerns.
396
397Each version is given a distinguishing version number.  If the Library
398specifies a version number of this License which applies to it and
399"any later version", you have the option of following the terms and
400conditions either of that version or of any later version published by
401the Free Software Foundation.  If the Library does not specify a
402license version number, you may choose any version ever published by
403the Free Software Foundation.
404
405  14. If you wish to incorporate parts of the Library into other free
406programs whose distribution conditions are incompatible with these,
407write to the author to ask for permission.  For software which is
408copyrighted by the Free Software Foundation, write to the Free
409Software Foundation; we sometimes make exceptions for this.  Our
410decision will be guided by the two goals of preserving the free status
411of all derivatives of our free software and of promoting the sharing
412and reuse of software generally.
413
414                            NO WARRANTY
415
416  15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
417WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
418EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
419OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
420KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
421IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
422PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
423LIBRARY IS WITH YOU.  SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
424THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
425
426  16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
427WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
428AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
429FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
430CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
431LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
432RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
433FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
434SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
435DAMAGES.
436
437                     END OF TERMS AND CONDITIONS
438
439           How to Apply These Terms to Your New Libraries
440
441  If you develop a new library, and you want it to be of the greatest
442possible use to the public, we recommend making it free software that
443everyone can redistribute and change.  You can do so by permitting
444redistribution under these terms (or, alternatively, under the terms of the
445ordinary General Public License).
446
447  To apply these terms, attach the following notices to the library.  It is
448safest to attach them to the start of each source file to most effectively
449convey the exclusion of warranty; and each file should have at least the
450"copyright" line and a pointer to where the full notice is found.
451
452    <one line to give the library's name and a brief idea of what it does.>
453    Copyright (C) <year>  <name of author>
454
455    This library is free software; you can redistribute it and/or
456    modify it under the terms of the GNU Library General Public
457    License as published by the Free Software Foundation; either
458    version 2 of the License, or (at your option) any later version.
459
460    This library is distributed in the hope that it will be useful,
461    but WITHOUT ANY WARRANTY; without even the implied warranty of
462    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
463    Library General Public License for more details.
464
465    You should have received a copy of the GNU Library General Public
466    License along with this library; if not, write to the Free Software
467    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
468
469Also add information on how to contact you by electronic and paper mail.
470
471You should also get your employer (if you work as a programmer) or your
472school, if any, to sign a "copyright disclaimer" for the library, if
473necessary.  Here is a sample; alter the names:
474
475  Yoyodyne, Inc., hereby disclaims all copyright interest in the
476  library `Frob' (a library for tweaking knobs) written by James Random Hacker.
477
478  <signature of Ty Coon>, 1 April 1990
479  Ty Coon, President of Vice
480
481That's all there is to it!
482