[1166] | 1 | GNU LIBRARY GENERAL PUBLIC LICENSE
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| 2 | Version 2, June 1991
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| 3 |
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| 4 | Copyright (C) 1991 Free Software Foundation, Inc.
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| 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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| 6 | Everyone is permitted to copy and distribute verbatim copies
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| 7 | of this license document, but changing it is not allowed.
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| 8 |
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| 9 | [This is the first released version of the library GPL. It is
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| 10 | numbered 2 because it goes with version 2 of the ordinary GPL.]
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| 11 |
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| 12 | Preamble
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| 13 |
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| 14 | The licenses for most software are designed to take away your
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| 15 | freedom to share and change it. By contrast, the GNU General Public
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| 16 | Licenses are intended to guarantee your freedom to share and change
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| 17 | free software--to make sure the software is free for all its users.
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| 18 |
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| 19 | This license, the Library General Public License, applies to some
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| 20 | specially designated Free Software Foundation software, and to any
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| 21 | other libraries whose authors decide to use it. You can use it for
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| 22 | your libraries, too.
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| 23 |
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| 24 | When we speak of free software, we are referring to freedom, not
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| 25 | price. Our General Public Licenses are designed to make sure that you
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| 26 | have the freedom to distribute copies of free software (and charge for
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| 27 | this service if you wish), that you receive source code or can get it
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| 28 | if you want it, that you can change the software or use pieces of it
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| 29 | in new free programs; and that you know you can do these things.
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| 30 |
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| 31 | To protect your rights, we need to make restrictions that forbid
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| 32 | anyone to deny you these rights or to ask you to surrender the rights.
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| 33 | These restrictions translate to certain responsibilities for you if
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| 34 | you distribute copies of the library, or if you modify it.
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| 35 |
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| 36 | For example, if you distribute copies of the library, whether gratis
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| 37 | or for a fee, you must give the recipients all the rights that we gave
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| 38 | you. You must make sure that they, too, receive or can get the source
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| 39 | code. If you link a program with the library, you must provide
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| 40 | complete object files to the recipients so that they can relink them
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| 41 | with the library, after making changes to the library and recompiling
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| 42 | it. And you must show them these terms so they know their rights.
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| 43 |
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| 44 | Our method of protecting your rights has two steps: (1) copyright
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| 45 | the library, and (2) offer you this license which gives you legal
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| 46 | permission to copy, distribute and/or modify the library.
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| 47 |
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| 48 | Also, for each distributor's protection, we want to make certain
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| 49 | that everyone understands that there is no warranty for this free
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| 50 | library. If the library is modified by someone else and passed on, we
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| 51 | want its recipients to know that what they have is not the original
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| 52 | version, so that any problems introduced by others will not reflect on
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| 53 | the original authors' reputations.
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| 54 | |
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| 55 |
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| 56 | Finally, any free program is threatened constantly by software
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| 57 | patents. We wish to avoid the danger that companies distributing free
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| 58 | software will individually obtain patent licenses, thus in effect
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| 59 | transforming the program into proprietary software. To prevent this,
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| 60 | we have made it clear that any patent must be licensed for everyone's
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| 61 | free use or not licensed at all.
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| 62 |
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| 63 | Most GNU software, including some libraries, is covered by the ordinary
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| 64 | GNU General Public License, which was designed for utility programs. This
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| 65 | license, the GNU Library General Public License, applies to certain
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| 66 | designated libraries. This license is quite different from the ordinary
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| 67 | one; be sure to read it in full, and don't assume that anything in it is
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| 68 | the same as in the ordinary license.
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| 69 |
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| 70 | The reason we have a separate public license for some libraries is that
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| 71 | they blur the distinction we usually make between modifying or adding to a
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| 72 | program and simply using it. Linking a program with a library, without
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| 73 | changing the library, is in some sense simply using the library, and is
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| 74 | analogous to running a utility program or application program. However, in
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| 75 | a textual and legal sense, the linked executable is a combined work, a
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| 76 | derivative of the original library, and the ordinary General Public License
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| 77 | treats it as such.
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| 78 |
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| 79 | Because of this blurred distinction, using the ordinary General
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| 80 | Public License for libraries did not effectively promote software
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| 81 | sharing, because most developers did not use the libraries. We
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| 82 | concluded that weaker conditions might promote sharing better.
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| 83 |
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| 84 | However, unrestricted linking of non-free programs would deprive the
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| 85 | users of those programs of all benefit from the free status of the
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| 86 | libraries themselves. This Library General Public License is intended to
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| 87 | permit developers of non-free programs to use free libraries, while
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| 88 | preserving your freedom as a user of such programs to change the free
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| 89 | libraries that are incorporated in them. (We have not seen how to achieve
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| 90 | this as regards changes in header files, but we have achieved it as regards
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| 91 | changes in the actual functions of the Library.) The hope is that this
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| 92 | will lead to faster development of free libraries.
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| 93 |
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| 94 | The precise terms and conditions for copying, distribution and
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| 96 | "work based on the library" and a "work that uses the library". The
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| 97 | former contains code derived from the library, while the latter only
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| 98 | works together with the library.
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| 99 |
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| 100 | Note that it is possible for a library to be covered by the ordinary
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| 101 | General Public License rather than by this special one.
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| 102 | |
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| 103 |
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| 104 | GNU LIBRARY GENERAL PUBLIC LICENSE
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| 105 | TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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| 107 | 0. This License Agreement applies to any software library which
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| 108 | contains a notice placed by the copyright holder or other authorized
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| 109 | party saying it may be distributed under the terms of this Library
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| 112 |
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| 131 | Activities other than copying, distribution and modification are not
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| 139 | 1. You may copy and distribute verbatim copies of the Library's
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| 173 | (For example, a function in a library to compute square roots has
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| 177 | be optional: if the application does not supply it, the square
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| 178 | root function must still compute square roots.)
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| 180 | These requirements apply to the modified work as a whole. If
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| 185 | distribute the same sections as part of a whole which is a work based
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| 190 |
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| 191 | Thus, it is not the intent of this section to claim rights or contest
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| 199 | the scope of this License.
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| 201 | 3. You may opt to apply the terms of the ordinary GNU General Public
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| 204 | that they refer to the ordinary GNU General Public License, version 2,
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| 241 | Section 6 states terms for distribution of such executables.
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| 262 |
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| 263 | 6. As an exception to the Sections above, you may also compile or
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| 290 | b) Accompany the work with a written offer, valid for at
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| 318 | 7. You may place library facilities that are a work based on the
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| 373 | If any portion of this section is held invalid or unenforceable under any
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| 393 | original copyright holder who places the Library under this License may add
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| 394 | an explicit geographical distribution limitation excluding those countries,
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| 395 | so that distribution is permitted only in or among countries not thus
|
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| 396 | excluded. In such case, this License incorporates the limitation as if
|
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| 397 | written in the body of this License.
|
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| 398 |
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| 399 | 13. The Free Software Foundation may publish revised and/or new
|
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| 400 | versions of the Library General Public License from time to time.
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| 401 | Such new versions will be similar in spirit to the present version,
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| 402 | but may differ in detail to address new problems or concerns.
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| 403 |
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| 404 | Each version is given a distinguishing version number. If the Library
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| 405 | specifies a version number of this License which applies to it and
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| 406 | "any later version", you have the option of following the terms and
|
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| 407 | conditions either of that version or of any later version published by
|
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| 408 | the Free Software Foundation. If the Library does not specify a
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| 409 | license version number, you may choose any version ever published by
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| 410 | the Free Software Foundation.
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| 411 | |
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| 412 |
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| 413 | 14. If you wish to incorporate parts of the Library into other free
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| 414 | programs whose distribution conditions are incompatible with these,
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| 415 | write to the author to ask for permission. For software which is
|
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| 416 | copyrighted by the Free Software Foundation, write to the Free
|
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| 417 | Software Foundation; we sometimes make exceptions for this. Our
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| 418 | decision will be guided by the two goals of preserving the free status
|
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| 419 | of all derivatives of our free software and of promoting the sharing
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| 420 | and reuse of software generally.
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| 421 |
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| 422 | NO WARRANTY
|
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| 423 |
|
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| 424 | 15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
|
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| 425 | WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
|
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| 426 | EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
|
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| 427 | OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
|
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| 428 | KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
|
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| 429 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
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| 430 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
|
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| 431 | LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
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| 432 | THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
|
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| 433 |
|
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| 434 | 16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
|
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| 435 | WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
|
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| 436 | AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
|
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| 437 | FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
|
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| 438 | CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
|
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| 439 | LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
|
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| 440 | RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
|
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| 441 | FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
|
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| 442 | SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
|
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| 443 | DAMAGES.
|
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| 444 |
|
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| 445 | END OF TERMS AND CONDITIONS
|
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| 446 | |
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| 447 |
|
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| 448 | Appendix: How to Apply These Terms to Your New Libraries
|
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| 449 |
|
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| 450 | If you develop a new library, and you want it to be of the greatest
|
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| 451 | possible use to the public, we recommend making it free software that
|
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| 452 | everyone can redistribute and change. You can do so by permitting
|
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| 453 | redistribution under these terms (or, alternatively, under the terms of the
|
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| 454 | ordinary General Public License).
|
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| 455 |
|
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| 456 | To apply these terms, attach the following notices to the library. It is
|
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| 457 | safest to attach them to the start of each source file to most effectively
|
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| 458 | convey the exclusion of warranty; and each file should have at least the
|
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| 459 | "copyright" line and a pointer to where the full notice is found.
|
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| 460 |
|
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| 461 | <one line to give the library's name and a brief idea of what it does.>
|
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| 462 | Copyright (C) <year> <name of author>
|
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| 463 |
|
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| 464 | This library is free software; you can redistribute it and/or
|
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| 465 | modify it under the terms of the GNU Library General Public
|
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| 466 | License as published by the Free Software Foundation; either
|
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| 467 | version 2 of the License, or (at your option) any later version.
|
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| 468 |
|
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| 469 | This library is distributed in the hope that it will be useful,
|
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| 470 | but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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| 471 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
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| 472 | Library General Public License for more details.
|
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| 473 |
|
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| 474 | You should have received a copy of the GNU Library General Public
|
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| 475 | License along with this library; if not, write to the Free
|
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| 476 | Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
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| 477 | MA 02110-1301, USA
|
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| 478 |
|
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| 479 | Also add information on how to contact you by electronic and paper mail.
|
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| 480 |
|
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| 481 | You should also get your employer (if you work as a programmer) or your
|
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| 482 | school, if any, to sign a "copyright disclaimer" for the library, if
|
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| 483 | necessary. Here is a sample; alter the names:
|
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| 484 |
|
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| 485 | Yoyodyne, Inc., hereby disclaims all copyright interest in the
|
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| 486 | library `Frob' (a library for tweaking knobs) written by James Random Hacker.
|
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| 487 |
|
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| 488 | <signature of Ty Coon>, 1 April 1990
|
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| 489 | Ty Coon, President of Vice
|
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| 490 |
|
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| 491 | That's all there is to it!
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