rlm@0: rlm@0: GNU LIBRARY GENERAL PUBLIC LICENSE rlm@0: Version 2, June 1991 rlm@0: rlm@0: rlm@0: Copyright (C) 1991 Free Software Foundation, Inc. rlm@0: 675 Mass Ave, Cambridge, MA 02139, USA rlm@0: Everyone is permitted to copy and distribute verbatim copies rlm@0: of this license document, but changing it is not allowed. rlm@0: rlm@0: [This is the first released version of the library GPL. It is rlm@0: numbered 2 because it goes with version 2 of the ordinary GPL.] rlm@0: rlm@0: Preamble rlm@0: rlm@0: The licenses for most software are designed to take away your rlm@0: freedom to share and change it. By contrast, the GNU General Public rlm@0: Licenses are intended to guarantee your freedom to share and change rlm@0: free software--to make sure the software is free for all its users. rlm@0: rlm@0: This license, the Library General Public License, applies to some rlm@0: specially designated Free Software Foundation software, and to any rlm@0: other libraries whose authors decide to use it. You can use it for rlm@0: your libraries, too. rlm@0: rlm@0: When we speak of free software, we are referring to freedom, not rlm@0: price. Our General Public Licenses are designed to make sure that you rlm@0: have the freedom to distribute copies of free software (and charge for rlm@0: this service if you wish), that you receive source code or can get it rlm@0: if you want it, that you can change the software or use pieces of it rlm@0: in new free programs; and that you know you can do these things. rlm@0: rlm@0: To protect your rights, we need to make restrictions that forbid rlm@0: anyone to deny you these rights or to ask you to surrender the rights. rlm@0: These restrictions translate to certain responsibilities for you if rlm@0: you distribute copies of the library, or if you modify it. rlm@0: rlm@0: For example, if you distribute copies of the library, whether gratis rlm@0: or for a fee, you must give the recipients all the rights that we gave rlm@0: you. You must make sure that they, too, receive or can get the source rlm@0: code. If you link a program with the library, you must provide rlm@0: complete object files to the recipients so that they can relink them rlm@0: with the library, after making changes to the library and recompiling rlm@0: it. And you must show them these terms so they know their rights. rlm@0: rlm@0: Our method of protecting your rights has two steps: (1) copyright rlm@0: the library, and (2) offer you this license which gives you legal rlm@0: permission to copy, distribute and/or modify the library. rlm@0: rlm@0: Also, for each distributor's protection, we want to make certain rlm@0: that everyone understands that there is no warranty for this free rlm@0: library. If the library is modified by someone else and passed on, we rlm@0: want its recipients to know that what they have is not the original rlm@0: version, so that any problems introduced by others will not reflect on rlm@0: the original authors' reputations. rlm@0: rlm@0: Finally, any free program is threatened constantly by software rlm@0: patents. We wish to avoid the danger that companies distributing free rlm@0: software will individually obtain patent licenses, thus in effect rlm@0: transforming the program into proprietary software. To prevent this, rlm@0: we have made it clear that any patent must be licensed for everyone's rlm@0: free use or not licensed at all. rlm@0: rlm@0: Most GNU software, including some libraries, is covered by the ordinary rlm@0: GNU General Public License, which was designed for utility programs. This rlm@0: license, the GNU Library General Public License, applies to certain rlm@0: designated libraries. This license is quite different from the ordinary rlm@0: one; be sure to read it in full, and don't assume that anything in it is rlm@0: the same as in the ordinary license. rlm@0: rlm@0: The reason we have a separate public license for some libraries is that rlm@0: they blur the distinction we usually make between modifying or adding to a rlm@0: program and simply using it. Linking a program with a library, without rlm@0: changing the library, is in some sense simply using the library, and is rlm@0: analogous to running a utility program or application program. However, in rlm@0: a textual and legal sense, the linked executable is a combined work, a rlm@0: derivative of the original library, and the ordinary General Public License rlm@0: treats it as such. rlm@0: rlm@0: Because of this blurred distinction, using the ordinary General rlm@0: Public License for libraries did not effectively promote software rlm@0: sharing, because most developers did not use the libraries. We rlm@0: concluded that weaker conditions might promote sharing better. rlm@0: rlm@0: However, unrestricted linking of non-free programs would deprive the rlm@0: users of those programs of all benefit from the free status of the rlm@0: libraries themselves. This Library General Public License is intended to rlm@0: permit developers of non-free programs to use free libraries, while rlm@0: preserving your freedom as a user of such programs to change the free rlm@0: libraries that are incorporated in them. (We have not seen how to achieve rlm@0: this as regards changes in header files, but we have achieved it as regards rlm@0: changes in the actual functions of the Library.) The hope is that this rlm@0: will lead to faster development of free libraries. rlm@0: rlm@0: The precise terms and conditions for copying, distribution and rlm@0: modification follow. Pay close attention to the difference between a rlm@0: "work based on the library" and a "work that uses the library". The rlm@0: former contains code derived from the library, while the latter only rlm@0: works together with the library. rlm@0: rlm@0: Note that it is possible for a library to be covered by the ordinary rlm@0: General Public License rather than by this special one. rlm@0: rlm@0: GNU LIBRARY GENERAL PUBLIC LICENSE rlm@0: TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION rlm@0: rlm@0: 0. This License Agreement applies to any software library which rlm@0: contains a notice placed by the copyright holder or other authorized rlm@0: party saying it may be distributed under the terms of this Library rlm@0: General Public License (also called "this License"). Each licensee is rlm@0: addressed as "you". rlm@0: rlm@0: A "library" means a collection of software functions and/or data rlm@0: prepared so as to be conveniently linked with application programs rlm@0: (which use some of those functions and data) to form executables. rlm@0: rlm@0: The "Library", below, refers to any such software library or work rlm@0: which has been distributed under these terms. A "work based on the rlm@0: Library" means either the Library or any derivative work under rlm@0: copyright law: that is to say, a work containing the Library or a rlm@0: portion of it, either verbatim or with modifications and/or translated rlm@0: straightforwardly into another language. (Hereinafter, translation is rlm@0: included without limitation in the term "modification".) rlm@0: rlm@0: "Source code" for a work means the preferred form of the work for rlm@0: making modifications to it. For a library, complete source code means rlm@0: all the source code for all modules it contains, plus any associated rlm@0: interface definition files, plus the scripts used to control compilation rlm@0: and installation of the library. rlm@0: rlm@0: Activities other than copying, distribution and modification are not rlm@0: covered by this License; they are outside its scope. The act of rlm@0: running a program using the Library is not restricted, and output from rlm@0: such a program is covered only if its contents constitute a work based rlm@0: on the Library (independent of the use of the Library in a tool for rlm@0: writing it). Whether that is true depends on what the Library does rlm@0: and what the program that uses the Library does. rlm@0: rlm@0: 1. You may copy and distribute verbatim copies of the Library's rlm@0: complete source code as you receive it, in any medium, provided that rlm@0: you conspicuously and appropriately publish on each copy an rlm@0: appropriate copyright notice and disclaimer of warranty; keep intact rlm@0: all the notices that refer to this License and to the absence of any rlm@0: warranty; and distribute a copy of this License along with the rlm@0: Library. rlm@0: rlm@0: You may charge a fee for the physical act of transferring a copy, rlm@0: and you may at your option offer warranty protection in exchange for a rlm@0: fee. rlm@0: rlm@0: 2. You may modify your copy or copies of the Library or any portion rlm@0: of it, thus forming a work based on the Library, and copy and rlm@0: distribute such modifications or work under the terms of Section 1 rlm@0: above, provided that you also meet all of these conditions: rlm@0: rlm@0: a) The modified work must itself be a software library. rlm@0: rlm@0: b) You must cause the files modified to carry prominent notices rlm@0: stating that you changed the files and the date of any change. rlm@0: rlm@0: c) You must cause the whole of the work to be licensed at no rlm@0: charge to all third parties under the terms of this License. rlm@0: rlm@0: d) If a facility in the modified Library refers to a function or a rlm@0: table of data to be supplied by an application program that uses rlm@0: the facility, other than as an argument passed when the facility rlm@0: is invoked, then you must make a good faith effort to ensure that, rlm@0: in the event an application does not supply such function or rlm@0: table, the facility still operates, and performs whatever part of rlm@0: its purpose remains meaningful. rlm@0: rlm@0: (For example, a function in a library to compute square roots has rlm@0: a purpose that is entirely well-defined independent of the rlm@0: application. Therefore, Subsection 2d requires that any rlm@0: application-supplied function or table used by this function must rlm@0: be optional: if the application does not supply it, the square rlm@0: root function must still compute square roots.) rlm@0: rlm@0: These requirements apply to the modified work as a whole. If rlm@0: identifiable sections of that work are not derived from the Library, rlm@0: and can be reasonably considered independent and separate works in rlm@0: themselves, then this License, and its terms, do not apply to those rlm@0: sections when you distribute them as separate works. But when you rlm@0: distribute the same sections as part of a whole which is a work based rlm@0: on the Library, the distribution of the whole must be on the terms of rlm@0: this License, whose permissions for other licensees extend to the rlm@0: entire whole, and thus to each and every part regardless of who wrote rlm@0: it. rlm@0: rlm@0: Thus, it is not the intent of this section to claim rights or contest rlm@0: your rights to work written entirely by you; rather, the intent is to rlm@0: exercise the right to control the distribution of derivative or rlm@0: collective works based on the Library. rlm@0: rlm@0: In addition, mere aggregation of another work not based on the Library rlm@0: with the Library (or with a work based on the Library) on a volume of rlm@0: a storage or distribution medium does not bring the other work under rlm@0: the scope of this License. rlm@0: rlm@0: 3. You may opt to apply the terms of the ordinary GNU General Public rlm@0: License instead of this License to a given copy of the Library. To do rlm@0: this, you must alter all the notices that refer to this License, so rlm@0: that they refer to the ordinary GNU General Public License, version 2, rlm@0: instead of to this License. (If a newer version than version 2 of the rlm@0: ordinary GNU General Public License has appeared, then you can specify rlm@0: that version instead if you wish.) Do not make any other change in rlm@0: these notices. rlm@0: rlm@0: Once this change is made in a given copy, it is irreversible for rlm@0: that copy, so the ordinary GNU General Public License applies to all rlm@0: subsequent copies and derivative works made from that copy. rlm@0: rlm@0: This option is useful when you wish to copy part of the code of rlm@0: the Library into a program that is not a library. rlm@0: rlm@0: 4. You may copy and distribute the Library (or a portion or rlm@0: derivative of it, under Section 2) in object code or executable form rlm@0: under the terms of Sections 1 and 2 above provided that you accompany rlm@0: it with the complete corresponding machine-readable source code, which rlm@0: must be distributed under the terms of Sections 1 and 2 above on a rlm@0: medium customarily used for software interchange. rlm@0: rlm@0: If distribution of object code is made by offering access to copy rlm@0: from a designated place, then offering equivalent access to copy the rlm@0: source code from the same place satisfies the requirement to rlm@0: distribute the source code, even though third parties are not rlm@0: compelled to copy the source along with the object code. rlm@0: rlm@0: 5. A program that contains no derivative of any portion of the rlm@0: Library, but is designed to work with the Library by being compiled or rlm@0: linked with it, is called a "work that uses the Library". Such a rlm@0: work, in isolation, is not a derivative work of the Library, and rlm@0: therefore falls outside the scope of this License. rlm@0: rlm@0: However, linking a "work that uses the Library" with the Library rlm@0: creates an executable that is a derivative of the Library (because it rlm@0: contains portions of the Library), rather than a "work that uses the rlm@0: library". The executable is therefore covered by this License. rlm@0: Section 6 states terms for distribution of such executables. rlm@0: rlm@0: When a "work that uses the Library" uses material from a header file rlm@0: that is part of the Library, the object code for the work may be a rlm@0: derivative work of the Library even though the source code is not. rlm@0: Whether this is true is especially significant if the work can be rlm@0: linked without the Library, or if the work is itself a library. The rlm@0: threshold for this to be true is not precisely defined by law. rlm@0: rlm@0: If such an object file uses only numerical parameters, data rlm@0: structure layouts and accessors, and small macros and small inline rlm@0: functions (ten lines or less in length), then the use of the object rlm@0: file is unrestricted, regardless of whether it is legally a derivative rlm@0: work. (Executables containing this object code plus portions of the rlm@0: Library will still fall under Section 6.) rlm@0: rlm@0: Otherwise, if the work is a derivative of the Library, you may rlm@0: distribute the object code for the work under the terms of Section 6. rlm@0: Any executables containing that work also fall under Section 6, rlm@0: whether or not they are linked directly with the Library itself. rlm@0: rlm@0: 6. As an exception to the Sections above, you may also compile or rlm@0: link a "work that uses the Library" with the Library to produce a rlm@0: work containing portions of the Library, and distribute that work rlm@0: under terms of your choice, provided that the terms permit rlm@0: modification of the work for the customer's own use and reverse rlm@0: engineering for debugging such modifications. rlm@0: rlm@0: You must give prominent notice with each copy of the work that the rlm@0: Library is used in it and that the Library and its use are covered by rlm@0: this License. You must supply a copy of this License. If the work rlm@0: during execution displays copyright notices, you must include the rlm@0: copyright notice for the Library among them, as well as a reference rlm@0: directing the user to the copy of this License. Also, you must do one rlm@0: of these things: rlm@0: rlm@0: a) Accompany the work with the complete corresponding rlm@0: machine-readable source code for the Library including whatever rlm@0: changes were used in the work (which must be distributed under rlm@0: Sections 1 and 2 above); and, if the work is an executable linked rlm@0: with the Library, with the complete machine-readable "work that rlm@0: uses the Library", as object code and/or source code, so that the rlm@0: user can modify the Library and then relink to produce a modified rlm@0: executable containing the modified Library. (It is understood rlm@0: that the user who changes the contents of definitions files in the rlm@0: Library will not necessarily be able to recompile the application rlm@0: to use the modified definitions.) rlm@0: rlm@0: b) Accompany the work with a written offer, valid for at rlm@0: least three years, to give the same user the materials rlm@0: specified in Subsection 6a, above, for a charge no more rlm@0: than the cost of performing this distribution. rlm@0: rlm@0: c) If distribution of the work is made by offering access to copy rlm@0: from a designated place, offer equivalent access to copy the above rlm@0: specified materials from the same place. rlm@0: rlm@0: d) Verify that the user has already received a copy of these rlm@0: materials or that you have already sent this user a copy. rlm@0: rlm@0: For an executable, the required form of the "work that uses the rlm@0: Library" must include any data and utility programs needed for rlm@0: reproducing the executable from it. However, as a special exception, rlm@0: the source code distributed need not include anything that is normally rlm@0: distributed (in either source or binary form) with the major rlm@0: components (compiler, kernel, and so on) of the operating system on rlm@0: which the executable runs, unless that component itself accompanies rlm@0: the executable. rlm@0: rlm@0: It may happen that this requirement contradicts the license rlm@0: restrictions of other proprietary libraries that do not normally rlm@0: accompany the operating system. Such a contradiction means you cannot rlm@0: use both them and the Library together in an executable that you rlm@0: distribute. rlm@0: rlm@0: 7. You may place library facilities that are a work based on the rlm@0: Library side-by-side in a single library together with other library rlm@0: facilities not covered by this License, and distribute such a combined rlm@0: library, provided that the separate distribution of the work based on rlm@0: the Library and of the other library facilities is otherwise rlm@0: permitted, and provided that you do these two things: rlm@0: rlm@0: a) Accompany the combined library with a copy of the same work rlm@0: based on the Library, uncombined with any other library rlm@0: facilities. This must be distributed under the terms of the rlm@0: Sections above. rlm@0: rlm@0: b) Give prominent notice with the combined library of the fact rlm@0: that part of it is a work based on the Library, and explaining rlm@0: where to find the accompanying uncombined form of the same work. rlm@0: rlm@0: 8. You may not copy, modify, sublicense, link with, or distribute rlm@0: the Library except as expressly provided under this License. Any rlm@0: attempt otherwise to copy, modify, sublicense, link with, or rlm@0: distribute the Library is void, and will automatically terminate your rlm@0: rights under this License. However, parties who have received copies, rlm@0: or rights, from you under this License will not have their licenses rlm@0: terminated so long as such parties remain in full compliance. rlm@0: rlm@0: 9. You are not required to accept this License, since you have not rlm@0: signed it. However, nothing else grants you permission to modify or rlm@0: distribute the Library or its derivative works. These actions are rlm@0: prohibited by law if you do not accept this License. Therefore, by rlm@0: modifying or distributing the Library (or any work based on the rlm@0: Library), you indicate your acceptance of this License to do so, and rlm@0: all its terms and conditions for copying, distributing or modifying rlm@0: the Library or works based on it. rlm@0: rlm@0: 10. Each time you redistribute the Library (or any work based on the rlm@0: Library), the recipient automatically receives a license from the rlm@0: original licensor to copy, distribute, link with or modify the Library rlm@0: subject to these terms and conditions. You may not impose any further rlm@0: restrictions on the recipients' exercise of the rights granted herein. rlm@0: You are not responsible for enforcing compliance by third parties to rlm@0: this License. rlm@0: rlm@0: 11. If, as a consequence of a court judgment or allegation of patent rlm@0: infringement or for any other reason (not limited to patent issues), rlm@0: conditions are imposed on you (whether by court order, agreement or rlm@0: otherwise) that contradict the conditions of this License, they do not rlm@0: excuse you from the conditions of this License. If you cannot rlm@0: distribute so as to satisfy simultaneously your obligations under this rlm@0: License and any other pertinent obligations, then as a consequence you rlm@0: may not distribute the Library at all. For example, if a patent rlm@0: license would not permit royalty-free redistribution of the Library by rlm@0: all those who receive copies directly or indirectly through you, then rlm@0: the only way you could satisfy both it and this License would be to rlm@0: refrain entirely from distribution of the Library. rlm@0: rlm@0: If any portion of this section is held invalid or unenforceable under any rlm@0: particular circumstance, the balance of the section is intended to apply, rlm@0: and the section as a whole is intended to apply in other circumstances. rlm@0: rlm@0: It is not the purpose of this section to induce you to infringe any rlm@0: patents or other property right claims or to contest validity of any rlm@0: such claims; this section has the sole purpose of protecting the rlm@0: integrity of the free software distribution system which is rlm@0: implemented by public license practices. Many people have made rlm@0: generous contributions to the wide range of software distributed rlm@0: through that system in reliance on consistent application of that rlm@0: system; it is up to the author/donor to decide if he or she is willing rlm@0: to distribute software through any other system and a licensee cannot rlm@0: impose that choice. rlm@0: rlm@0: This section is intended to make thoroughly clear what is believed to rlm@0: be a consequence of the rest of this License. rlm@0: rlm@0: 12. If the distribution and/or use of the Library is restricted in rlm@0: certain countries either by patents or by copyrighted interfaces, the rlm@0: original copyright holder who places the Library under this License may add rlm@0: an explicit geographical distribution limitation excluding those countries, rlm@0: so that distribution is permitted only in or among countries not thus rlm@0: excluded. In such case, this License incorporates the limitation as if rlm@0: written in the body of this License. rlm@0: rlm@0: 13. The Free Software Foundation may publish revised and/or new rlm@0: versions of the Library General Public License from time to time. rlm@0: Such new versions will be similar in spirit to the present version, rlm@0: but may differ in detail to address new problems or concerns. rlm@0: rlm@0: Each version is given a distinguishing version number. If the Library rlm@0: specifies a version number of this License which applies to it and rlm@0: "any later version", you have the option of following the terms and rlm@0: conditions either of that version or of any later version published by rlm@0: the Free Software Foundation. If the Library does not specify a rlm@0: license version number, you may choose any version ever published by rlm@0: the Free Software Foundation. rlm@0: rlm@0: 14. If you wish to incorporate parts of the Library into other free rlm@0: programs whose distribution conditions are incompatible with these, rlm@0: write to the author to ask for permission. For software which is rlm@0: copyrighted by the Free Software Foundation, write to the Free rlm@0: Software Foundation; we sometimes make exceptions for this. Our rlm@0: decision will be guided by the two goals of preserving the free status rlm@0: of all derivatives of our free software and of promoting the sharing rlm@0: and reuse of software generally. rlm@0: rlm@0: NO WARRANTY rlm@0: rlm@0: 15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO rlm@0: WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW. rlm@0: EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR rlm@0: OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY rlm@0: KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE rlm@0: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR rlm@0: PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE rlm@0: LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME rlm@0: THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. rlm@0: rlm@0: 16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN rlm@0: WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY rlm@0: AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU rlm@0: FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR rlm@0: CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE rlm@0: LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING rlm@0: RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A rlm@0: FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF rlm@0: SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH rlm@0: DAMAGES. rlm@0: rlm@0: END OF TERMS AND CONDITIONS rlm@0: rlm@0: Appendix: How to Apply These Terms to Your New Libraries rlm@0: rlm@0: If you develop a new library, and you want it to be of the greatest rlm@0: possible use to the public, we recommend making it free software that rlm@0: everyone can redistribute and change. You can do so by permitting rlm@0: redistribution under these terms (or, alternatively, under the terms of the rlm@0: ordinary General Public License). rlm@0: rlm@0: To apply these terms, attach the following notices to the library. It is rlm@0: safest to attach them to the start of each source file to most effectively rlm@0: convey the exclusion of warranty; and each file should have at least the rlm@0: "copyright" line and a pointer to where the full notice is found. rlm@0: rlm@0: <one line to give the library's name and a brief idea of what it does.> rlm@0: Copyright (C) <year> <name of author> rlm@0: rlm@0: This library is free software; you can redistribute it and/or rlm@0: modify it under the terms of the GNU Library General Public rlm@0: License as published by the Free Software Foundation; either rlm@0: version 2 of the License, or (at your option) any later version. rlm@0: rlm@0: This library is distributed in the hope that it will be useful, rlm@0: but WITHOUT ANY WARRANTY; without even the implied warranty of rlm@0: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU rlm@0: Library General Public License for more details. rlm@0: rlm@0: You should have received a copy of the GNU Library General Public rlm@0: License along with this library; if not, write to the Free rlm@0: Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. rlm@0: rlm@0: Also add information on how to contact you by electronic and paper mail. rlm@0: rlm@0: You should also get your employer (if you work as a programmer) or your rlm@0: school, if any, to sign a "copyright disclaimer" for the library, if rlm@0: necessary. Here is a sample; alter the names: rlm@0: rlm@0: Yoyodyne, Inc., hereby disclaims all copyright interest in the rlm@0: library `Frob' (a library for tweaking knobs) written by James Random Hacker. rlm@0: rlm@0: <signature of Ty Coon>, 1 April 1990 rlm@0: Ty Coon, President of Vice rlm@0: rlm@0: That's all there is to it! rlm@0: