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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, 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.

When a "work that uses the Library" uses material from a header file that is part of the Library, the object code for the work may be a derivative work of
the Library even though the source code is not. Whether this is true is especially significant if the work can be linked without the Library, or if the work is
itself a library. The threshold for this to be true is not precisely defined by law.

If such an object file uses only 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 of whether it is legally a derivative work. (Executables containing this object code
plus portions of the Library will still fall under Section 6.)

Otherwise, if the work is a derivative of 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 exception to the Sections above, you may also combine or link a "work that uses the Library" with the Library to produce a work containing

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