?? lgpl-license
字號:
GNU Lesser General Public LicenseVersion 2.1, February 1999 Copyright (C) 1991, 1999 Free Software Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. [This is the first released version of the Lesser GPL. It also counts as the successor of the GNU Library Public License, version 2, hence the version number 2.1.]PreambleThe licenses for most software are designed to take away your freedom toshare and change it. By contrast, the GNU General Public Licenses areintended to guarantee your freedom to share and change free software--tomake sure the software is free for all its users.This license, the Lesser General Public License, applies to some speciallydesignated software packages--typically libraries--of the Free SoftwareFoundation and other authors who decide to use it. You can use it too, butwe suggest you first think carefully about whether this license or theordinary General Public License is the better strategy to use in anyparticular case, based on the explanations below.When we speak of free software, we are referring to freedom of use, notprice. Our General Public Licenses are designed to make sure that you havethe freedom to distribute copies of free software (and charge for thisservice if you wish); that you receive source code or can get it if you wantit; that you can change the software and use pieces of it in new freeprograms; and that you are informed that you can do these things.To protect your rights, we need to make restrictions that forbiddistributors to deny you these rights or to ask you to surrender theserights. These restrictions translate to certain responsibilities for you ifyou distribute copies of the library or if you modify it.For example, if you distribute copies of the library, whether gratis or fora fee, you must give the recipients all the rights that we gave you. Youmust make sure that they, too, receive or can get the source code. If youlink other code with the library, you must provide complete object files tothe recipients, so that they can relink them with the library after makingchanges to the library and recompiling it. And you must show them theseterms so they know their rights.We protect your rights with a two-step method: (1) we copyright the library,and (2) we offer you this license, which gives you legal permission to copy,distribute and/or modify the library.To protect each distributor, we want to make it very clear that there is nowarranty for the free library. Also, if the library is modified by someoneelse and passed on, the recipients should know that what they have is notthe original version, so that the original author's reputation will not beaffected by problems that might be introduced by others.Finally, software patents pose a constant threat to the existence of anyfree program. We wish to make sure that a company cannot effectivelyrestrict the users of a free program by obtaining a restrictive license froma patent holder. Therefore, we insist that any patent license obtained for aversion of the library must be consistent with the full freedom of usespecified in this license.Most GNU software, including some libraries, is covered by the ordinary GNUGeneral Public License. This license, the GNU Lesser General Public License,applies to certain designated libraries, and is quite different from theordinary General Public License. We use this license for certain librariesin order to permit linking those libraries into non-free programs.When a program is linked with a library, whether statically or using ashared library, the combination of the two is legally speaking a combinedwork, a derivative of the original library. The ordinary General PublicLicense therefore permits such linking only if the entire combination fitsits criteria of freedom. The Lesser General Public License permits more laxcriteria for linking other code with the library.We call this license the "Lesser" General Public License because it doesLess to protect the user's freedom than the ordinary General PublicLicense. It also provides other free software developers Less of anadvantage over competing non-free programs. These disadvantages are thereason we use the ordinary General Public License for manylibraries. However, the Lesser license provides advantages in certainspecial circumstances.For example, on rare occasions, there may be a special need to encourage thewidest possible use of a certain library, so that it becomes a de-factostandard. To achieve this, non-free programs must be allowed to use thelibrary. A more frequent case is that a free library does the same job aswidely used non-free libraries. In this case, there is little to gain bylimiting the free library to free software only, so we use the LesserGeneral Public License.In other cases, permission to use a particular library in non-free programsenables a greater number of people to use a large body of free software. Forexample, permission to use the GNU C Library in non-free programs enablesmany more people to use the whole GNU operating system, as well as itsvariant, the GNU/Linux operating system.Although the Lesser General Public License is Less protective of the users'freedom, it does ensure that the user of a program that is linked with theLibrary has the freedom and the wherewithal to run that program using amodified version of the Library.The precise terms and conditions for copying, distribution and modificationfollow. Pay close attention to the difference between a "work based on thelibrary" and a "work that uses the library". The former contains codederived from the library, whereas the latter must be combined with thelibrary in order to run. TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION ANDMODIFICATION0. This License Agreement applies to any software library or other programwhich contains a notice placed by the copyright holder or other authorizedparty saying it may be distributed under the terms of this Lesser GeneralPublic License (also called "this License"). Each licensee is addressed as"you".A "library" means a collection of software functions and/or data prepared soas to be conveniently linked with application programs (which use some ofthose functions and data) to form executables.The "Library", below, refers to any such software library or work which hasbeen distributed under these terms. A "work based on the Library" meanseither the Library or any derivative work under copyright law: that is tosay, a work containing the Library or a portion of it, either verbatim orwith modifications and/or translated straightforwardly into anotherlanguage. (Hereinafter, translation is included without limitation in theterm "modification".)"Source code" for a work means the preferred form of the work for makingmodifications to it. For a library, complete source code means all thesource code for all modules it contains, plus any associated interfacedefinition files, plus the scripts used to control compilation andinstallation of the library.Activities other than copying, distribution and modification are not coveredby this License; they are outside its scope. The act of running a programusing the Library is not restricted, and output from such a program iscovered only if its contents constitute a work based on the Library(independent of the use of the Library in a tool for writing it). Whetherthat is true depends on what the Library does and what the program that usesthe Library does.1. You may copy and distribute verbatim copies of the Library's completesource code as you receive it, in any medium, provided that youconspicuously and appropriately publish on each copy an appropriatecopyright notice and disclaimer of warranty; keep intact all the noticesthat refer to this License and to the absence of any warranty; anddistribute a copy of this License along with the Library.You may charge a fee for the physical act of transferring a copy, and youmay at your option offer warranty protection in exchange for a fee.2. You may modify your copy or copies of the Library or any portion of it,thus forming a work based on the Library, and copy and distribute suchmodifications or work under the terms of Section 1 above, provided that youalso meet all of these conditions: a) The modified work must itself be a software library. b) You must cause the files modified to carry prominent notices stating that you changed the files and the date of any change. c) You must cause the whole of the work to be licensed at no charge to all third parties under the terms of this License. d) If a facility in the modified Library refers to a function or a table of data to be supplied by an application program that uses the facility, other than as an argument passed when the facility is invoked, then you must make a good faith effort to ensure that, in the event an application does not supply such function or table, the facility still operates, and performs whatever part of its purpose remains meaningful. (For example, a function in a library to compute square roots has a purpose that is entirely well-defined independent of the application. Therefore, Subsection 2d requires that any application-supplied function or table used by this function must be optional: if the application does not supply it, the square root function must still compute square roots.) These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the Library, and can be reasonably considered independent and separate works in themselves, then this License, and its terms, do not apply to those sections when you distribute them as separate works. But when you distribute the same sections as part of a whole which is a work based on the Library, the distribution of the whole must be on the terms of this License, whose permissions for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote it. Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you; rather, the intent is to exercise the right to control the distribution of derivative or collective works based on the Library. In addition, mere aggregation of another work not based on the Library with the Library (or with a work based on the Library) on a volume of a storage or distribution medium does not bring the other work under the scope of this License.3. You may opt to apply the terms of the ordinary GNU General Public Licenseinstead of this License to a given copy of the Library. To do this, you mustalter all the notices that refer to this License, so that they refer to theordinary GNU General Public License, version 2, instead of to thisLicense. (If a newer version than version 2 of the ordinary GNU GeneralPublic License has appeared, then you can specify that version instead ifyou wish.) Do not make any other change in these notices.Once this change is made in a given copy, it is irreversible for that copy,so the ordinary GNU General Public License applies to all subsequent copiesand derivative works made from that copy.This option is useful when you wish to copy part of the code of the Libraryinto a program that is not a library.4. You may copy and distribute the Library (or a portion or derivative ofit, under Section 2) in object code or executable form under the terms ofSections 1 and 2 above provided that you accompany it with the completecorresponding machine-readable source code, which must be distributed underthe terms of Sections 1 and 2 above on a medium customarily used forsoftware interchange.If distribution of object code is made by offering access to copy from adesignated place, then offering equivalent access to copy the source codefrom the same place satisfies the requirement to distribute the source code,even though third parties are not compelled to copy the source along withthe object code.5. A program that contains no derivative of any portion of the Library, butis designed to work with the Library by being compiled or linked with it, iscalled a "work that uses the Library". Such a work, in isolation, is not aderivative work of the Library, and therefore falls outside the scope ofthis License.However, linking a "work that uses the Library" with the Library creates anexecutable that is a derivative of the Library (because it contains portionsof the Library), rather than a "work that uses the library". The executableis therefore covered by this License. Section 6 states terms for
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -