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Software License Notice
A-7
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Appendix
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 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 the executable from it.
However, as a special exception, the materials to be
distributed need not include anything that is normally
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 restrictions of other proprietary libraries that do
not normally accompany the operating system. Such a
contradiction means you cannot use both them and the
Library together in an executable that you distribute.
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