WESM zl Management and Configuration Guide WT.01.03 and greater

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with the library, you must provide complete object files to the recipients so
that they can relink them with the library, after making changes to the library
and recompiling it. And you must show them these terms so they know their
rights.
Our method of protecting your rights has two steps: (1) copyright the library,
and (2) offer you this license which gives you legal permission to copy,
distribute and/or modify the library.
Also, for each distributor's protection, we want to make certain that everyone
understands that there is no warranty for this free library. If the library is
modified by someone else and passed on, we want its recipients to know that what
they have is not the original version, so that any problems introduced by others
will not reflect on the original authors' reputations.
Finally, any free program is threatened constantly by software patents. We wish
to avoid the danger that companies distributing free software will individually
obtain patent licenses, thus in effect transforming the program into proprietary
software. To prevent this, we have made it clear that any patent must be
licensed for everyone's free use or not licensed at all.
Most GNU software, including some libraries, is covered by the ordinary GNU
General Public License, which was designed for utility programs. This license,
the GNU Library General Public License, applies to certain designated libraries.
This license is quite different from the ordinary one; be sure to read it in
full, and don't assume that anything in it is the same as in the ordinary
license.
The reason we have a separate public license for some libraries is that they blur
the distinction we usually make between modifying or adding to a program and
simply using it. Linking a program with a library, without changing the library,
is in some sense simply using the library, and is analogous to running a utility
program or application program. However, in a textual and legal sense, the
linked executable is a combined work, a derivative of the original library, and
the ordinary General Public License treats it as such.
Because of this blurred distinction, using the ordinary General Public License
for libraries did not effectively promote software sharing, because most
developers did not use the libraries. We concluded that weaker conditions might
promote sharing better.
However, unrestricted linking of non-free programs would deprive the users of
those programs of all benefit from the free status of the libraries themselves.
This Library General Public License is intended to permit developers of non-free
programs to use free libraries, while preserving your freedom as a user of such
programs to change the free this as regards changes in header files, but we have
achieved it as regardslibraries that are incorporated in them. (We have not seen
how to achieve changes in the actual functions of the Library.) The hope is that
this will lead to faster development of free libraries