72
NOTICES AND LICENCES FOR SOFTWARE USED IN THIS PRODUCT
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, which must be distributed under the terms of
Sections 1 and 2 above on a medium customarily used
for software interchange.
If distribution of object code is made by offering
access to copy from a designated place, then offering
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
compelled to copy the source along 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 not a derivative work of the Library, and
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 portions of 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.