English

they can relink them with the library after mak- ing changes to the library and recompiling it. And you must show them these terms so they know their rights.

We protect your rights with a two-step meth- od: (1) we copyright the library, and (2) we of- fer 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 no warranty for the free library. Also, if the library is modified by someone else and passed on, the re- cipients should know that what they have is not the original version, so that the original author's reputation will not be affected by problems that might be introduced by oth-

ers. Finally, software patents pose a constant threat to the existence of

any free program. We wish to make sure that a company cannot effectively restrict the users of a free program by obtaining a restrictive license from a patent holder.

Therefore, we insist that any patent license obtained for a version of the library must be consistent with the full freedom of use specified in this license.

Most GNU software, including some li- braries, is covered by the ordinary GNU General Public License. This license, the GNU Lesser General Public License, ap- plies to certain designated libraries, and is quite different from the ordinary General Public License. We use this license for certain libraries in order to permit linking those librar- ies into non-free programs.

When a program is linked with a library, whether statically or using a shared library, the combination of the two is legally speaking a combined work, a derivative of the original li- brary. The ordinary General Public License therefore permits such linking only if the entire combination fits its criteria of freedom. The Lesser General Public License permits more lax criteria for linking other code with

the library.We

call this license the "Lesser" General Public

License because it does Less to protect the us- er's freedom than the ordinary General Public License. It also provides other free software developers Less of an advantage over compet- ing non-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 more frequent case is that a free library does the same job as widely used non-free libraries. In this case, there is little 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 in non- free programs enables a greater number of people to use a large body of free software. For example, permission to use the GNU C Library in non-free programs enables many more 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 of a program that is linked with the Library has the freedom and the wherewithal to run that program using a modified version of the

Library.The precise terms and conditions for copying, distribution and modification follow. Pay close attention to the difference between a "work based on the library" and a "work that uses the library". The former contains code derived from the library, whereas the latter must be combined with the library in order to run.

GNU LESSER GENERAL PULIC LICENSE

TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

0.This License Agreement applies to any software library or other program which con- tains a notice placed by the copyright holder or other authorized party saying it may be distributed under the terms of this Lesser

General Public License (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 application programs (which use some of those functions and data) to form executables.

The "Library", below, refers to any such