beautypg.com

45 english – Toshiba BDX1250 User Manual

Page 45

background image

45

English

not the original version, so that the original author'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'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 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 of to this License. (If a newer version than version

2 of the ordinary GNU General Public License has appeared,

then you can specify that version instead if you wish.) Do not

make any other change in these notices. Once this change

is made in a given copy, it is irreversible for that copy, so the

ordinary GNU General Public License applies to all subsequent

copies and derivative works made from that copy. This option

is useful when you wish to copy part of the code of the Library

into a program that is not a library. 4. You may copy and

distribute the Library (or a portion or derivative of it, under

Section 2) in object code or executable form under the terms

of Sections 1 and 2 above provided that you accompany it with

the complete corresponding machine-readable source code,