Differential D27245 Diff 75246 LICENSES/LGPL-2.0-or-later.txt

Changeset View

Standalone View

LICENSES/LGPL-2.0-or-later.txt

This file was added.

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