Pioneer AVIC-F220 Uživatelská příručka

Stránka 4

Advertising
background image

4

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'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' 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 PUBLIC
LICENSE

TERMS AND CONDITIONS FOR COPYING,
DISTRIBUTION AND MODIFICATION

0. This License Agreement applies to any software
library or other program which contains 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 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 work containing the
Library or a portion of it, either verbatim or with
modifications and/or translated straightforwardly into
another language. (Hereinafter, translation is
included without limitation in the term „modification“.)
„Source code“ for a work means the preferred form
of the work for making modifications to it. For a
library, complete source code means all the source
code for all modules it contains, plus any associated
interface definition files, plus the scripts used to
control compilation and installation of the library.
Activities other than copying, distribution and
modification are not covered by this License; they
are outside its scope. The act of running a program
using the Library is not restricted, and output from
such a program is covered only if its contents
constitute a work based on the Library (independent
of the use of the Library in a tool for writing it).
Whether that is true depends on what the Library
does and what the program that uses the Library
does.
1. You may copy and distribute verbatim copies of
the Library's complete source code as you receive it,
in any medium, provided that you conspicuously and
appropriately publish on each copy an appropriate
copyright notice and disclaimer of warranty; keep
intact all the notices that refer to this License and to
the absence of any warranty; and distribute a copy of
this License along with the Library.
You may charge a fee for the physical act of
transferring a copy, and you may at your option offer
warranty protection in exchange for a fee.
2. You may modify your copy or copies of the Library
or any portion of it, thus forming a work based on the
Library, and copy and distribute such modifications

INFO-AVICF220-CZ.fm Page 4 Tuesday, March 30, 2010 11:17 AM

Advertising