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Ve
rs
ion 2,
21
.12.
2006
d) If a facility in the modified Library refers to a function or a table of data to be supplied by an appli-
cation 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-sup-
plied 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 them-
selves, 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.
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that they refer to the ordinary GNU General Public License, version 2, instead of to this License. (If a
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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
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You may copy and distribute the Library (or a portion or derivative of it, under Section 2) in object
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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
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