ライセンス情報48(つづき)A “work based on the Library” means either the Libraryor any derivative work under copyright law: that is tosay, a work containing the Library or a portion of it,either verbatim or with modifications and/or translatedstraightforwardly into another language. (Hereinafter,translation is included without limitation in the term“modification”.) “Source code” for a work means thepreferred form of the work for making modificationsto it. For a library, complete source code means allthe source code for all modules it contains, plus anyassociated interface definition files, plus the scriptsused to control compilation and installation of thelibrary.Activities other than copying, distribution andmodification are not covered by this License; they areoutside its scope. The act of running a program usingthe Library is not restricted, and output from such aprogram is covered only if its contents constitute awork based on the Library (independent of the useof the Library in a tool for writing it). Whether that istrue depends on what the Library does and what theprogram that uses the Library does.1. You may copy and distribute verbatim copies of theLibrary’s complete source code as you receive it, inany medium, provided that you conspicuously andappropriately publish on each copy an appropriatecopyright notice and disclaimer of warranty; keepintact all the notices that refer to this License and tothe absence of any warranty; and distribute a copy ofthis License along with the Library.You may charge a fee for the physical act oftransferring a copy, and you may at your option offerwarranty protection in exchange for a fee.2. You may modify your copy or copies of the Library orany portion of it, thus forming a work based on theLibrary, and copy and distribute such modificationsor work under the terms of Section 1 above, providedthat you also meet all of these conditions:a) The modified work must itself be a softwarelibrary.b) You must cause the files modified to carryprominent notices stating that you changed thefiles and the date of any change.c) You must cause the whole of the work to belicensed at no charge to all third parties underthe terms of this License.d) If a facility in the modified Library refers to afunction or a table of data to be supplied by anapplication program that uses the facility, otherthan as an argument passed when the facility isinvoked, then you must make a good faith effortto ensure that, in the event an application doesnot supply such function or table, the facility stilloperates, and performs whatever part of itspurpose remains meaningful.(For example, a function in a library to computesquare roots has a purpose that is entirelywell-defined independent of the application.Therefore, Subsection 2d requires that anyapplication-supplied function or table used bythis function must be optional: if the applicationdoes not supply it, the square root function muststill compute square roots.)These requirements apply to the modified workas a whole. If identifiable sections of that work arenot derived from the Library, and can bereasonably considered independent and separateworks in themselves, then this License, and itsterms, do not apply to those sections when youdistribute them as separate works. But whenyou distribute the same sections as part of awhole which is a work based on the Library, thedistribution of the whole must be on the termsof this License, whose permissions for otherlicensees extend to the entire whole, and thus toeach and every part regardless of who wrote it.Thus, it is not the intent of this section to claimrights or contest your rights to work written entirelyby you; rather, the intent is to exercise the right tocontrol the distribution of derivative or collectiveworks based on the Library.In addition, mere aggregation of another work notbased on the Library with the Library (or with awork based on the Library) on a volume of astorage or distribution medium does not bring theother work under the scope of this License.3. You may opt to apply the terms of the ordinary GNUGeneral Public License instead of this License to agiven copy of the Library. To do this, you must alter allthe notices that refer to this License, so that they referto the ordinary GNU General Public License, version2, instead of to this License. (If a newer version thanversion 2 of the ordinary GNU General Public Licensehas appeared, then you can specify that versioninstead if you wish.) Do not make any other change inthese notices.Once this change is made in a given copy, it isirreversible for that copy, so the ordinary GNU GeneralPublic License applies to all subsequent copies andderivative works made from that copy.This option is useful when you wish to copy part of thecode of the Library into a program that is not a library.4. You may copy and distribute the Library (or a portionor derivative of it, under Section 2) in object code orexecutable form under the terms of Sections 1 and2 above provided that you accompany it with thecomplete corresponding machinereadable sourcecode, which must be distributed under the terms ofSections 1 and 2 above on a medium customarily usedfor software interchange.If distribution of object code is made by offering accessto copy from a designated place, then offering equivalentaccess to copy the source code from the same placesatisfies the requirement to distribute the source code,even though third parties are not compelled to copy thesource along with the object code.5. A program that contains no derivative of any portionof the Library, but is designed to work with the Libraryby being compiled or linked with it, is called a “workthat uses the Library”. Such a work, in isolation, is nota derivative work of the Library, and therefore fallsoutside the scope of this License.However, linking a “work that uses the Library” withthe Library creates an executable that is a derivativeof the Library (because it contains portions of theLibrary), rather than a “work that uses the library”.The executable is therefore covered by this License.Section 6 states terms for distribution of suchexecutables. When a “work that uses the Library” usesmaterial from a header file that is part of the Library,the object code for the work may be a derivative workof the Library even though the source code is not.Whether this is true is especially significant if the workcan be linked without the Library, or if the work isitself a library. The threshold for this to be true is notprecisely defined by law. If such an object file uses