Toshiba BDK21KU Owner's Manual

47When a program is linked with a library, whether statically or using a shared library, the combination of the two is legallyspeaking a combined work, a derivative of the original library. The ordinary General Public License therefore permitssuch linking only if the entire combination fits its criteria of freedom. The Lesser General Public License permits morelax criteria for linking other code with the library.We call this license the “Lesser” General Public License because it does Less to protect the user’s freedom than theordinary General Public License. It also provides other free software developers Less of an advantage over competingnon-free programs. These disadvantages are the reason we use the ordinary General Public License for many libraries.However, the Lesser license provides advantages in certain special circumstances.For example, on rare occasions, there may be a special need to encourage the widest possible use of a certain library,so that it becomes a de-facto standard. To achieve this, non-free programs must be allowed to use the library. A morefrequent case is that a free library does the same job as widely used non-free libraries. In this case, there is little to gainby 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 in non-free programs enables a greater number of people to usea large body of free software. For example, permission to use the GNU C Library in non-free programs enables manymore people to use the whole GNU operating system, as well as its variant, the GNU/Linux operating system.Although the Lesser General Public License is Less protective of the users’ freedom, it does ensure that the user ofa program that is linked with the Library has the freedom and the wherewithal to run that program using a modifiedversion of the Library.The precise terms and conditions for copying, distribution and modification follow. Pay close attention to the differencebetween a “work based on the library” and a “work that uses the library”. The former contains code derived from thelibrary, whereas the latter must be combined 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 library or other program which contains a notice placed by thecopyright holder or other authorized party saying it may be distributed under the terms of this Lesser General PublicLicense (also called “this License”). Each licensee is addressed as “you”.A “library” means a collection of software functions and/or data prepared so as to be conveniently linked with applicationprograms (which use some of those functions and data) to form executables.The “Library”, below, refers to any such software library or work which has been distributed under these terms. A“work based on the Library” means either the Library or any derivative work under copyright law: that is to say, a workcontaining the Library or a portion of it, either verbatim or with modifications and/or translated straightforwardly intoanother language. 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Therefore, Subsection 2d requires that any application-supplied function or table used by this functionmust be optional: if the application does not supply it, the square root function must still compute square roots.)