beautypg.com

30 english – Toshiba BDX1250 User Manual

Page 30

background image

30

English

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 Li-

cense. This license, the GNU Lesser General Public

License, applies to certain designated libraries, and

is quite different from the ordinary General Pub-

lic 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 PULIC 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 or work under the

terms of Section 1 above, provided that you also meet all of

these conditions:

a) The modified work must itself be a software

library.

b) You must cause the files modified to carry

prominent notices stating that you changed

the files and the date of any change.

c) You must cause the whole of the work to be licensed at

no charge to all third parties under the terms of this License.

d) If a facility in the modified Library refers to a function

or a table of data to be supplied by an application program

that uses the facility, other than as an argument passed

when the facility is invoked, then you must make a good faith

effort to ensure that, in the event an application does not

supply such function or table, the facility still operates, and

performs whatever part of its purpose remains meaningful.

(For example, a function in a library to compute square

roots has a purpose that is entirely well-defined independent

of the application. Therefore, Subsection 2d requires that any

application-supplied function or table used by this function

must be optional: if the application does not supply it, the

square root function must still compute square roots.) These

requirements apply to the modified work as a whole. If

identifiable sections of that work are not derived from the

Library, and can be reasonably considered independent and

separate works in themselves, then this License, and its

terms, do not apply to those sections when you distribute

them as separate works. But when you distribute the same

sections as part of a whole which is a work based on the

Library, the distribution of the whole must be on the terms of

this License, whose permissions for other licensees extend to

the entire whole, and thus to each and every part regardless

of who wrote it. Thus, it is not the intent of this section to

claim rights or contest your rights to work written entirely

by you; rather, the intent is to exercise the right to control

the distribution of derivative or collective works based on the

Library. In addition, mere aggregation of another work not

based on the Library with the Library (or with a work based on

the Library) on a volume of a storage or distribution medium

does not bring the other work under the scope of this License.

3. You may opt to apply the terms of the ordinary GNU

General Public License instead of this License to a given

copy of the Library. To do this, you must alter all the

notices that refer to this License, so that they refer to the

ordinary GNU General Public License, version 2, instead