[18310] | 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 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 | Finally, any free program is threatened constantly by software |
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| 56 | patents. We wish to avoid the danger that companies distributing free |
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| 57 | software will individually obtain patent licenses, thus in effect |
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| 58 | transforming the program into proprietary software. To prevent this, |
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| 59 | we have made it clear that any patent must be licensed for everyone's |
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| 60 | free use or not licensed at all. |
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| 61 | |
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| 62 | Most GNU software, including some libraries, is covered by the ordinary |
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| 63 | GNU General Public License, which was designed for utility programs. This |
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| 64 | license, the GNU Library General Public License, applies to certain |
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| 65 | designated libraries. This license is quite different from the ordinary |
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| 66 | one; be sure to read it in full, and don't assume that anything in it is |
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| 67 | the same as in the ordinary license. |
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| 68 | |
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| 69 | The reason we have a separate public license for some libraries is that |
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| 70 | they blur the distinction we usually make between modifying or adding to a |
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| 71 | program and simply using it. Linking a program with a library, without |
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| 72 | changing the library, is in some sense simply using the library, and is |
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| 73 | analogous to running a utility program or application program. However, in |
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| 74 | a textual and legal sense, the linked executable is a combined work, a |
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| 75 | derivative of the original library, and the ordinary General Public License |
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| 76 | treats it as such. |
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| 77 | |
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| 78 | Because of this blurred distinction, using the ordinary General |
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| 79 | Public License for libraries did not effectively promote software |
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| 80 | sharing, because most developers did not use the libraries. We |
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| 81 | concluded that weaker conditions might promote sharing better. |
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| 82 | |
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| 83 | However, unrestricted linking of non-free programs would deprive the |
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| 84 | users of those programs of all benefit from the free status of the |
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| 85 | libraries themselves. This Library General Public License is intended to |
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| 86 | permit developers of non-free programs to use free libraries, while |
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| 87 | preserving your freedom as a user of such programs to change the free |
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| 88 | libraries that are incorporated in them. (We have not seen how to achieve |
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| 89 | this as regards changes in header files, but we have achieved it as regards |
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| 90 | changes in the actual functions of the Library.) The hope is that this |
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| 91 | will lead to faster development of free libraries. |
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| 92 | |
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| 93 | The precise terms and conditions for copying, distribution and |
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| 94 | modification follow. Pay close attention to the difference between a |
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| 95 | "work based on the library" and a "work that uses the library". The |
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| 96 | former contains code derived from the library, while the latter only |
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| 97 | works together with the library. |
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| 98 | |
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| 99 | Note that it is possible for a library to be covered by the ordinary |
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| 100 | General Public License rather than by this special one. |
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| 101 | |
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| 102 | GNU LIBRARY GENERAL PUBLIC LICENSE |
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| 103 | TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION |
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| 104 | |
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| 105 | 0. This License Agreement applies to any software library which |
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| 106 | contains a notice placed by the copyright holder or other authorized |
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| 107 | party saying it may be distributed under the terms of this Library |
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| 110 | |
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| 111 | A "library" means a collection of software functions and/or data |
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| 112 | prepared so as to be conveniently linked with application programs |
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| 115 | The "Library", below, refers to any such software library or work |
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| 123 | "Source code" for a work means the preferred form of the work for |
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| 136 | |
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| 137 | 1. You may copy and distribute verbatim copies of the Library's |
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| 159 | c) You must cause the whole of the work to be licensed at no |
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| 161 | |
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| 162 | d) If a facility in the modified Library refers to a function or a |
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| 163 | table of data to be supplied by an application program that uses |
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| 166 | in the event an application does not supply such function or |
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| 168 | its purpose remains meaningful. |
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| 169 | |
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| 170 | (For example, a function in a library to compute square roots has |
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| 174 | be optional: if the application does not supply it, the square |
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| 175 | root function must still compute square roots.) |
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| 187 | |
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| 188 | Thus, it is not the intent of this section to claim rights or contest |
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| 196 | the scope of this License. |
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| 197 | |
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| 198 | 3. You may opt to apply the terms of the ordinary GNU General Public |
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| 207 | Once this change is made in a given copy, it is irreversible for |
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| 214 | 4. You may copy and distribute the Library (or a portion or |
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| 215 | derivative of it, under Section 2) in object code or executable form |
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| 218 | must be distributed under the terms of Sections 1 and 2 above on a |
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| 221 | If distribution of object code is made by offering access to copy |
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| 227 | 5. A program that contains no derivative of any portion of the |
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| 232 | |
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| 233 | However, linking a "work that uses the Library" with the Library |
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| 234 | creates an executable that is a derivative of the Library (because it |
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| 237 | Section 6 states terms for distribution of such executables. |
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| 238 | |
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| 239 | When a "work that uses the Library" uses material from a header file |
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| 244 | threshold for this to be true is not precisely defined by law. |
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| 246 | If such an object file uses only numerical parameters, data |
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| 247 | structure layouts and accessors, and small macros and small inline |
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| 250 | work. (Executables containing this object code plus portions of the |
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| 253 | Otherwise, if the work is a derivative of the Library, you may |
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| 254 | distribute the object code for the work under the terms of Section 6. |
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| 256 | whether or not they are linked directly with the Library itself. |
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| 257 | |
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| 258 | 6. As an exception to the Sections above, you may also compile or |
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| 261 | under terms of your choice, provided that the terms permit |
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| 263 | engineering for debugging such modifications. |
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| 264 | |
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| 265 | You must give prominent notice with each copy of the work that the |
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| 266 | Library is used in it and that the Library and its use are covered by |
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| 271 | of these things: |
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| 273 | a) Accompany the work with the complete corresponding |
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| 274 | machine-readable source code for the Library including whatever |
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| 275 | changes were used in the work (which must be distributed under |
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| 281 | that the user who changes the contents of definitions files in the |
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| 283 | to use the modified definitions.) |
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| 284 | |
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| 285 | b) Accompany the work with a written offer, valid for at |
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| 287 | specified in Subsection 6a, above, for a charge no more |
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| 289 | |
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| 290 | c) If distribution of the work is made by offering access to copy |
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| 292 | specified materials from the same place. |
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| 293 | |
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| 294 | d) Verify that the user has already received a copy of these |
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| 295 | materials or that you have already sent this user a copy. |
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| 297 | For an executable, the required form of the "work that uses the |
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| 300 | the source code distributed need not include anything that is normally |
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| 303 | which the executable runs, unless that component itself accompanies |
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| 306 | It may happen that this requirement contradicts the license |
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| 310 | distribute. |
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| 311 | |
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| 312 | 7. You may place library facilities that are a work based on the |
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| 313 | Library side-by-side in a single library together with other library |
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| 314 | facilities not covered by this License, and distribute such a combined |
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| 315 | library, provided that the separate distribution of the work based on |
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| 319 | a) Accompany the combined library with a copy of the same work |
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| 320 | based on the Library, uncombined with any other library |
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| 321 | facilities. This must be distributed under the terms of the |
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| 324 | b) Give prominent notice with the combined library of the fact |
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| 325 | that part of it is a work based on the Library, and explaining |
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| 327 | |
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| 328 | 8. You may not copy, modify, sublicense, link with, or distribute |
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| 329 | the Library except as expressly provided under this License. Any |
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| 330 | attempt otherwise to copy, modify, sublicense, link with, or |
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| 334 | terminated so long as such parties remain in full compliance. |
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| 335 | |
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| 336 | 9. You are not required to accept this License, since you have not |
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| 337 | signed it. However, nothing else grants you permission to modify or |
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| 338 | distribute the Library or its derivative works. These actions are |
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| 339 | prohibited by law if you do not accept this License. Therefore, by |
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| 343 | the Library or works based on it. |
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| 344 | |
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| 345 | 10. Each time you redistribute the Library (or any work based on the |
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| 349 | restrictions on the recipients' exercise of the rights granted herein. |
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| 350 | You are not responsible for enforcing compliance by third parties to |
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| 351 | this License. |
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| 352 | |
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| 353 | 11. If, as a consequence of a court judgment or allegation of patent |
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| 354 | infringement or for any other reason (not limited to patent issues), |
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| 355 | conditions are imposed on you (whether by court order, agreement or |
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| 356 | otherwise) that contradict the conditions of this License, they do not |
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| 358 | distribute so as to satisfy simultaneously your obligations under this |
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| 360 | may not distribute the Library at all. For example, if a patent |
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| 362 | all those who receive copies directly or indirectly through you, then |
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| 366 | If any portion of this section is held invalid or unenforceable under any |
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| 367 | particular circumstance, the balance of the section is intended to apply, |
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| 368 | and the section as a whole is intended to apply in other circumstances. |
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| 369 | |
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| 370 | It is not the purpose of this section to induce you to infringe any |
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| 371 | patents or other property right claims or to contest validity of any |
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| 372 | such claims; this section has the sole purpose of protecting the |
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| 373 | integrity of the free software distribution system which is |
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| 375 | generous contributions to the wide range of software distributed |
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| 377 | system; it is up to the author/donor to decide if he or she is willing |
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| 378 | to distribute software through any other system and a licensee cannot |
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| 379 | impose that choice. |
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| 380 | |
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| 381 | This section is intended to make thoroughly clear what is believed to |
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| 382 | be a consequence of the rest of this License. |
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| 383 | |
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| 384 | 12. If the distribution and/or use of the Library is restricted in |
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| 385 | certain countries either by patents or by copyrighted interfaces, the |
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| 386 | original copyright holder who places the Library under this License may add |
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| 387 | an explicit geographical distribution limitation excluding those countries, |
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| 388 | so that distribution is permitted only in or among countries not thus |
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| 389 | excluded. In such case, this License incorporates the limitation as if |
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| 390 | written in the body of this License. |
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| 391 | |
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| 392 | 13. The Free Software Foundation may publish revised and/or new |
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| 393 | versions of the Library General Public License from time to time. |
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| 394 | Such new versions will be similar in spirit to the present version, |
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| 395 | but may differ in detail to address new problems or concerns. |
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| 396 | |
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| 397 | Each version is given a distinguishing version number. If the Library |
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| 398 | specifies a version number of this License which applies to it and |
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| 399 | "any later version", you have the option of following the terms and |
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| 400 | conditions either of that version or of any later version published by |
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| 401 | the Free Software Foundation. If the Library does not specify a |
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| 402 | license version number, you may choose any version ever published by |
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| 403 | the Free Software Foundation. |
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| 404 | |
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| 405 | 14. If you wish to incorporate parts of the Library into other free |
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| 406 | programs whose distribution conditions are incompatible with these, |
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| 407 | write to the author to ask for permission. For software which is |
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| 408 | copyrighted by the Free Software Foundation, write to the Free |
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| 409 | Software Foundation; we sometimes make exceptions for this. Our |
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| 410 | decision will be guided by the two goals of preserving the free status |
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| 411 | of all derivatives of our free software and of promoting the sharing |
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| 412 | and reuse of software generally. |
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| 413 | |
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| 414 | NO WARRANTY |
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| 415 | |
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| 416 | 15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO |
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| 417 | WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW. |
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| 418 | EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR |
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| 420 | KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE |
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| 421 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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| 423 | LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME |
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| 424 | THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. |
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| 425 | |
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| 426 | 16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN |
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| 427 | WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY |
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| 428 | AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU |
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| 429 | FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR |
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| 430 | CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE |
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| 431 | LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING |
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| 432 | RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A |
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| 433 | FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF |
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| 434 | SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
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| 435 | DAMAGES. |
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| 436 | |
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| 437 | END OF TERMS AND CONDITIONS |
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| 438 | |
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| 439 | Appendix: How to Apply These Terms to Your New Libraries |
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| 440 | |
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| 441 | If you develop a new library, and you want it to be of the greatest |
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| 442 | possible use to the public, we recommend making it free software that |
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| 443 | everyone can redistribute and change. You can do so by permitting |
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| 444 | redistribution under these terms (or, alternatively, under the terms of the |
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| 445 | ordinary General Public License). |
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| 446 | |
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| 447 | To apply these terms, attach the following notices to the library. It is |
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| 448 | safest to attach them to the start of each source file to most effectively |
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| 449 | convey the exclusion of warranty; and each file should have at least the |
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| 450 | "copyright" line and a pointer to where the full notice is found. |
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| 451 | |
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| 452 | <one line to give the library's name and a brief idea of what it does.> |
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| 453 | Copyright (C) <year> <name of author> |
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| 454 | |
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| 455 | This library is free software; you can redistribute it and/or |
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| 456 | modify it under the terms of the GNU Library General Public |
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| 457 | License as published by the Free Software Foundation; either |
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| 458 | version 2 of the License, or (at your option) any later version. |
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| 459 | |
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| 460 | This library is distributed in the hope that it will be useful, |
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| 461 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 462 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 463 | Library General Public License for more details. |
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| 464 | |
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| 465 | You should have received a copy of the GNU Library General Public |
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| 466 | License along with this library; if not, write to the Free |
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| 467 | Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
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| 468 | MA 02111-1307, USA |
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| 469 | |
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| 470 | Also add information on how to contact you by electronic and paper mail. |
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| 471 | |
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| 472 | You should also get your employer (if you work as a programmer) or your |
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| 473 | school, if any, to sign a "copyright disclaimer" for the library, if |
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| 474 | necessary. Here is a sample; alter the names: |
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| 475 | |
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| 476 | Yoyodyne, Inc., hereby disclaims all copyright interest in the |
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| 477 | library `Frob' (a library for tweaking knobs) written by James Random Hacker. |
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| 478 | |
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| 479 | <signature of Ty Coon>, 1 April 1990 |
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| 480 | Ty Coon, President of Vice |
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| 481 | |
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| 482 | That's all there is to it! |
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