53
It
08
08
For example, on rare occasions, there may
be a special need to encourage the widest
possible use of a certain libra
becomes a de-facto standard. To achieve
this, non-free progra
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
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 operati
system.
Although the Lesser General Public
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 a
follow. Pay close attention to
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 i
TERMS AND CONDITIONS
COPYING, DISTRIBUTION AND
MODIFICATION
0. This License Agreement a
software library or other pr
contains a notice placed by the
copyright
party saying it may be di
the terms of this Lesser General Public
License (also called “this License”).
Each licensee is addressed as “you”.
A “library” means
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 “Libra
software library or wor
distributed under these terms. A “work
based on the Library” means either the
Library or any derivati
copyright law: that is to say, a work
containing the Library or a portion of it,
either verbatim or with modifications
and/or translated straightfor
another language. (Hereinafter,
translation is included without
limitation in the term “m
“Source code” for a work means the
preferred form of the work for
modifications to it. For a libra
complete source code means all the
source code for all mod
plus any associated
files, plus the
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 Librar
the use of the Library in a tool for writing
it). Whether that is true depends on
what the Library does and
program that uses the Library does.
1. You may copy and distribute
copies of the Library's complete sour
code as you receive it, in any medium,
provided that you conspicuously and
appropriat
appropriat
disclaimer of warranty
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 Librar
and copy
modifications or work under the terms
of Section 1 above, provided that you
also meet all of these conditions:
a)
software library.
b)
carry prominent notices stating that
you changed the files and the date of
any chan
c)
to be licensed at no
parties under the terms of this
License.
d)
refers to a function or a table of data
to be supplied by an ap
program that uses the facility, other
than as an argument passed w
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 oper
whatever pa
meaningful.
(For example, a function in a library to
compute square roots has a purp
that is entirely well-defin
of the application. Therefore,
Subsection 2d requires that any
application-supplied fun
used by this function must be optio
if the application
square root function must still
square
These requirements apply to the
modified work as a whole. If
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
the same sections as part of a whole
which is a work
the distribution of the whol
the terms of this License, whose
permissions for other licensees extend
to the entire whole, and thus to each
and every pa
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
collecti
In addition, mere aggreg
another work no
with the Library (or with a work based on
the Library) on a vo
distribut
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 co
the Library. To do this, you must alter all
the no
tices that refer to this License, so
that they refer to the ord
inary GNU
General Public License, version 2,
instead of to this License. (If a new
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 ir
the ordinary GNU G
License applies to all subsequent
copies and der
that copy.
This option is useful when you wish to
copy part of the code of
a program that is not a library.
4. Yo
(or a portio
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, which
must be distri
Sections 1 and 2 above on a medium
customarily used for sof
interc
If
offering access to copy from a
designate
equivalent access to copy the source
code from the same place satisfies the
requirement to distribute the source
code, even though third parties are not
compell
with the object code.
5. A program that contains no derivative of
any portion of the Library, but is
designed to work with the Library by
being compiled or linked with it, is
called a “work that uses the Library”.
Such a work, in isolation, is n
derivat
therefore falls outside the scope of this
License.
However, linking a “work that uses the
Library” with the Library creates an
executable that is a derivative of the
Library (because it contains
the Library), rather than a “work that
uses the library”. The executable is
therefore covered by this License.
Section 6 states terms for distribution of
such executables.
When a “work that uses the Library”
uses material from a header file that is
part of the Library, the object code fo
the work may be a derivative
Library even though the source code is
not. Whether this is true is es
significant if the work can be
without the Library, or if the work is itself
a library. The threshold for this to be true
is not precisely
If such an object file uses
numerical parameters, data structure
layouts and accessors, and small
macros and small inline functions (ten
lines or less in length), then the use of
the object file is unrestricted,
regardless o
derivati
containing this object code plus
portions of the Librar
Section 6.)
Otherwise, if the work is a der
the Library, you may distribute the
object code for the work under the
terms of Section 6. Any executables
containing that work also fall under
Section 6, whether or not they are linked
directly with the Library itself.
6. As an excepti
you may also combine
that uses the Library” with the Library to
produce a work containing portions of
the Library, and distribute that work
under terms of your choice, provided
that the terms permit modification of
the work for the customer’s own use
and reverse
such modifications.
You must give prominent notice with
each copy of the work that the Library is
used in i
use are covered by this License. You
must supply a copy of this Licens
work during execution displays
copyright notices, you must include the
copyright notice for the Library among
them, as well as a reference direc
the user to the copy of this License.
Also, you must do one of these things:
a)
complete
readable source code for
including whatever change
used in the work (which must be
distribut
above); and, if the work is an
executable linked with the Library,
with the complete machine-readable
“work that uses the Library”, as object
code and/or source code, so that the
user can modify the Library and then
relink to pr
executable containing the modified
Library. (It is understood that the user
who changes the contents of
definitions files in the Li
necessarily be ab
application to use the modified
definitions.)
b)
mechanism for linking with the
Library
that (1) uses at run time a copy of the
library already pr
computer system, rather than
copying librar
executable, and (2) will operate
properly with a modified version of the
library, if the u
as the mod
ified version is in
terface-
compatible with the version that the
work was made with.
c)
offer, valid for at least three years, to
give the same user the materials
specified in Subsection 6a, above, for
a charge no more than the cost of
performing th
d)
offering access to copy from a
designat
access to copy the above specified
materials from the same place.
e)
received a copy of these materials or
that you have already sent this us
copy.
For an executable, the required form of
the “work that uses the Library” must
include any data an
needed for reproducing the executable
from it. However, as a
the materials to be distributed need not
include anything that is nor
distributed (in either source or binary
form) with the major components
(compiler, kernel, and so on) of the
operating system on which the
executable runs, unless that
component itself accompanies the
executable.
It may happen that this requirement
contradicts the license restricti
other propri
normally accompany the opera
system. Such a contradiction means
you cannot use both them and the
Library together in an executable that
you distribute.
7. You may place library faci
work based on th
in a single library together with other
library facilities not covered by this
License, and distri
combined library, provided that the
separate distribution of the work based
on the Library and of the other librar
facilities is otherwise
provided that you do these two things:
a)
with a copy of the same work based
on the Library, uncombined with any
other library faciliti
distributed under the terms of the
Sections above.
b)
combined librar
of it is a work based on the Library,
and explaining where to find the
accompanying uncombined form of
the same work.
8. You may not copy, modify, sublicense,
link with, or distribute the Library except
as expressly pro
License. Any attempt otherwise to copy,
modify, sublicense, link with, or
distribute the Library i
automatically terminate your rights
under this License. However, parties
who have received copies, or rights,
from you under this License will not
have their licenses terminated so long
as such parties remain in f
compliance.
9. You are not required to accept this
License, since you have not signed it.
However, nothing else grants you
permission to modify or di
Library or
actions are prohibited by law if you do
not accept this License. Therefore, by
modifying o
any work based on the Librar
indicate your acceptance of this
License
conditions for copying, distr
modifyin
it.
10. Each time you r
(or any work ba
recipient automatically receives a
license from the origin
copy, distribute, link with or modify the
Library subject to these terms and
conditions. You may not impose any
further restri
exercise of the rights granted herein.
You are not responsible for enforcing
compliance by thir
License.
11. If, as a consequence of a court
judgment or allegation of patent
infringement or for any other rea
(not limited to patent issues),
conditions are imposed on you (whether
by court order, agreement or otherwise)
that contradict the conditions of this
License, they do not excuse you from
the conditions of this License. If you
cannot distribute so as to satisfy
simultaneously your obligations under
this License and any other pertinent
obligations, then as a consequence you
may not distribute the Library at all. For
example, if a patent license would not
permit royalty-f
Library by all those who receive copies
directly or indirectly through you, then
the only way you could satisfy b
and this License would be to refrain
entirely from distribution of the Lib
