6
dil32-b1.pdf
moreau1996 - 2013-10-29
http://www.orion-electric.co.jp/.../dil32-b1.pdf - 4.94MB - キャッシュ
21030view
52page / 4.94MB
copies of this license document, but changing it is notallowed.[This is the first released version of the Lesser GPL. It alsocounts 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 awayyour freedom to share and change it. By contrast, theGNU General Public Licenses are intended to guaranteeyour freedom to share and change free software--to makesure the software is free for all its users.This license, the Lesser General Public License, appliesto some specially designated software packages--typicallylibraries--of the Free Software Foundation and otherauthors who decide to use it. You can use it too, but wesuggest you first think carefully about whether this licenseor the ordinary General Public License is the betterstrategy to use in any particular case, based on theexplanations below.When we speak of free software, we are referring tofreedom of use, not price. Our General Public Licensesare designed to make sure that you have the freedom todistribute copies of free software (and charge for thisservice if you wish); that you receive source code or canget it if you want it; that you can change the software anduse pieces of it in new free programs; and that you areinformed that you can do these things.To protect your rights, we need to make restrictions thatforbid distributors to deny you these rights or to ask you tosurrender these rights. These restrictions translate tocertain responsibilities for you if you distribute copies ofthe library or if you modify it.For example, if you distribute copies of the library, whethergratis or for a fee, you must give the recipients all therights that we gave you. You must make sure that they,too, receive or can get the source code. If you link othercode with the library, you must provide complete objectfiles to the recipients, so that they can relink them with thelibrary after making changes to the library and recompilingit. And you must show them these terms so they knowtheir rights.We protect your rights with a two-step method: (1) wecopyright the library, and (2) we offer you this license,which gives you legal permission to copy, distribute and/ormodify the library.To protect each distributor, we want to make it very clear thatthere is no warranty for the free library. Also, if the library ismodified by someone else and passed on, the recipientsshould know that what they have is not the original version,so that the original author’s reputation will not be affectedby problems that might be introduced by others.Finally, software patents pose a constant threat to theexistence of any free program. We wish to make sure thata company cannot effectively restrict the users of a freeprogram by obtaining a restrictive license from a patentholder. Therefore, we insist that any patent licenseobtained for a version of the library must be consistentwith the full freedom of use specified in this license.Most GNU software, including some libraries, is coveredby the ordinary GNU General Public License. This license,the GNU Lesser General Public License, applies to certaindesignated libraries, and is quite different from the ordinaryGeneral Public License. We use this license for certainlibraries in order to permit linking those libraries into nonfree programs.When a program is linked with a library, whether staticallyor using a shared library, the combination of the two islegally speaking a combined work, a derivative of theoriginal library. The ordinary General Public Licensetherefore permits such linking only if the entire combinationfits its criteria of freedom. The Lesser General PublicLicense permits more lax criteria for linking other code withthe library.We call this license the ”Lesser” General Public Licensebecause it does Less to protect the user’s freedom thanthe ordinary General Public License. It also providesother free software developers Less of an advantage overcompeting non-free programs. These disadvantages arethe reason we use the ordinary General PublicLicense for many libraries. However, the Lesser licenseprovides advantages in certain special circumstances.For example, on rare occasions, there may be a specialneed to encourage the widest possible use of a certainlibrary, so that it becomes a de-facto standard. To achievethis, non-free programs must be allowed to use the library.A more frequent case is that a free library does the samejob as widely used non-free libraries. In this case, there islittle to gain by limiting the free library to free software only,so we use the Lesser General Public License.In other cases, permission to use a particular library innon-free programs enables a greater number of people touse a large body of free software. For example,permission to use the GNU C Library in non-free programsenables many more people to use the whole GNUoperating system, as well as its variant, the GNU/Linuxoperating system.Although the Lesser General Public License is Lessprotective of the users’ freedom, it does ensure that theuser of a program that is linked with the Library has thefreedom and the wherewithal to run that program using amodified version of the Library.その他The precise terms and conditions for copying, distributionand modification follow. Pay close attention to thedifference between a “work based on the library” and a“work that uses the library”. The former contains codederived from the library, whereas the latter must becombined with the library in order to run.GNU LESSER GENERAL PUBLIC LICENSETERMS AND CONDITIONS FOR COPYING,DISTRIBUTION AND MODIFICATION0. This License Agreement applies to any software libraryor other program which contains a notice placed bythe copyright holder or other authorized party sayingit may be distributed under the terms of this LesserGeneral Public License (also called “this License”).Each licensee is addressed as “you”. A “library” meansa collection of software functions and/or data preparedso as to be conveniently linked with applicationprograms (which use some of those functions anddata) to form executables.The “Library”, below, refers to any such software libraryor work which has been distributed under these terms.47
