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Section 11
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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.
7. 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.
8. As an exception to the Sections above, you may also compile 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) 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.