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there is no warranty for the free library.  Also, if the library is 
modified by someone else and passed on, the recipients should know 
that what they have is not the original version, so that the original 
author\xd5 s reputation will not be affected by problems that might be 
introduced by others. 
 
  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 libraries, is covered by the 
ordinary GNU General Public License.  This license, the GNU Lesser 
General Public License, applies 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 
libraries 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 library.  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 user\xd5 s freedom than the ordinary General 
Public License.  It also provides other free software developers Less 
of an advantage over competing 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\xd5  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