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@ -14,8 +14,9 @@ of this license document, but changing it is not allowed.
the version number 2.1.] the version number 2.1.]
Preamble Preamble
The licenses for most software are designed to take away your freedom to share and The licenses for most software are designed to take away your freedom to share and
change it. By contrast, the GNU General Public Licenses are intended to guarantee your change it. By contrast, the GNU General Public Licenses are intended to guarantee
freedom to share and change free software--to make sure the software is free for all your freedom to share and change free software--to make sure the software is free
for all
its users. its users.
This license, the Lesser General Public License, applies to some specially designated This license, the Lesser General Public License, applies to some specially designated
software packages--typically libraries--of the Free Software Foundation and other software packages--typically libraries--of the Free Software Foundation and other
@ -24,44 +25,45 @@ carefully about whether this license or the ordinary General Public License is t
better strategy to use in any particular case, based on the explanations below. better strategy to use in any particular case, based on the explanations below.
When we speak of free software, we are referring to freedom of use, not price. Our When we speak of free software, we are referring to freedom of use, not price. Our
General Public Licenses are designed to make sure that you have the freedom to General Public Licenses are designed to make sure that you have the freedom to
distribute copies of free software (and charge for this service if you wish); that you distribute copies of free software (and charge for this service if you wish); that
receive source code or can get it if you want it; that you can change the software and you receive source code or can get it if you want it; that you can change the
use pieces of it in new free programs; and that you are informed that you can do these software and use pieces of it in new free programs; and that you are informed that
things. you can do these things.
To protect your rights, we need to make restrictions that forbid distributors to deny To protect your rights, we need to make restrictions that forbid distributors to deny
you these rights or to ask you to surrender these rights. These restrictions translate you these rights or to ask you to surrender these rights. These restrictions
to certain responsibilities for you if you distribute copies of the library or if you translate to certain responsibilities for you if you distribute copies of the library
modify it. or if you modify it.
For example, if you distribute copies of the library, whether gratis or for a fee, you For example, if you distribute copies of the library, whether gratis or for a fee,
must give the recipients all the rights that we gave you. You must make sure that they, you must give the recipients all the rights that we gave you. You must make sure that
too, receive or can get the source code. If you link other code with the library, you they, too, receive or can get the source code. If you link other code with the
must provide complete object files to the recipients, so that they can relink them library, you must provide complete object files to the recipients, so that they can
with the library after making changes to the library and recompiling it. And you must relink them with the library after making changes to the library and recompiling it.
show them these terms so they know their rights. And you must show them these terms so they know their rights.
We protect your rights with a two-step method: (1) we copyright the library, and (2) 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 we offer you this license, which gives you legal permission to copy, distribute
modify the library. and/or modify the library.
To protect each distributor, we want to make it very clear that there is no warranty 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, for the free library. Also, if the library is modified by someone else and passed
the recipients should know that what they have is not the original version, so that on, the recipients should know that what they have is not the original version, so
the original author's reputation will not be affected by problems that might be that the original author's reputation will not be affected by problems that might be
introduced by others. introduced by others.
Finally, software patents pose a constant threat to the existence of any free program. Finally, software patents pose a constant threat to the existence of any free
We wish to make sure that a company cannot effectively restrict the users of a free program. We wish to make sure that a company cannot effectively restrict the users
program by obtaining a restrictive license from a patent holder. Therefore, we insist of a free program by obtaining a restrictive license from a patent holder.
that any patent license obtained for a version of the library must be consistent with Therefore, we insist that any patent license obtained for a version of the library
the full freedom of use specified in this license. must be consistent with the full freedom of use specified in this license.
Most GNU software, including some libraries, is covered by the ordinary GNU General Most GNU software, including some libraries, is covered by the ordinary GNU General
Public License. This license, the GNU Lesser General Public License, applies to Public License. This license, the GNU Lesser General Public License, applies to
certain designated libraries, and is quite different from the ordinary General Public certain designated libraries, and is quite different from the ordinary General
License. We use this license for certain libraries in order to permit linking those Public License. We use this license for certain libraries in order to permit linking
libraries into non-free programs. those libraries into non-free programs.
When a program is linked with a library, whether statically or using a shared library, When a program is linked with a library, whether statically or using a shared
the combination of the two is legally speaking a combined work, a derivative of the library, the combination of the two is legally speaking a combined work, a
original library. The ordinary General Public License therefore permits such linking derivative of the original library. The ordinary General Public License therefore
only if the entire combination fits its criteria of freedom. The Lesser General Public permits such linking only if the entire combination fits its criteria of freedom.
License permits more lax criteria for linking other code with the library. 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 We call this license the "Lesser" General Public License because it does Less to
protect the user's freedom than the ordinary General Public License. It also provides protect the user's freedom than the ordinary General Public License. It also provides
other free software developers Less of an advantage over competing non-free programs. other free software developers Less of an advantage over competing non-free programs.
@ -69,11 +71,11 @@ These disadvantages are the reason we use the ordinary General Public License fo
many libraries. However, the Lesser license provides advantages in certain special many libraries. However, the Lesser license provides advantages in certain special
circumstances. circumstances.
For example, on rare occasions, there may be a special need to encourage the widest 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 possible use of a certain library, so that it becomes a de-facto standard. To
this, non-free programs must be allowed to use the library. A more frequent case is achieve this, non-free programs must be allowed to use the library. A more frequent
that a free library does the same job as widely used non-free libraries. In this case, case is that a free library does the same job as widely used non-free libraries. In
there is little to gain by limiting the free library to free software only, so we use this case, there is little to gain by limiting the free library to free software only,
the Lesser General Public License. so we use the Lesser General Public License.
In other cases, permission to use a particular library in non-free programs enables 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, 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 permission to use the GNU C Library in non-free programs enables many more people to