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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".
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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 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
engineering for debugging such modifications.
You must give prominent notice with each copy of the
work that the Library is used in it and that the Library
and its use are covered by this License. You must supply
a copy of this License. If the work during execution
displays copyright notices, you must include the
copyright notice for the Library among them, as well as a
reference directing the user to the copy of this License.
Also, you must do one of these things:
a. Accompany the work with the complete
corresponding machine-readable source code
for the Library including whatever changes were
used in the work (which must be distributed
under Sections 1 and 2 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 produce a modified executable containing the
modified Library. (It is understood that the user
who changes the contents of definitions files in the
Library will not necessarily be able to recompile the
application to use the modified definitions.)
b. Use a suitable shared library mechanism for linking
with the Library. A suitable mechanism is one that
(1) uses at run time a copy of the library already
present on the user's computer system, rather than
copying library functions into the executable, and
(2) will operate properly with a modified version of
the library, if the user installs one, as long as the
modified version is interface-compatible with the
version that the work was made with.
c. Accompany the work with a written 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 this
distribution.
d. If distribution of the work is made by offering
access to copy from a designated place, offer
equivalent access to copy the above specified
materials from the same place.
e. Verify that the user has already received a copy of
these materials or that you have already sent this
user a copy. For an executable, the required form
of the "work that uses the Library" must include any
data and utility programs needed for reproducing
Section 2: Product Warranty
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