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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 executa-
ble 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 pro-
perly with a modified version of the library, if the user installs one, as long as the modified ver-
sion 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 perfor-
ming 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 distribu-
ted (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 accom-
panies 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.