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 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.
7. You may place library facilities that are a work based on the
Library side-by-side in a single library together with other library
facilities not covered by this License, and distribute such a
combined library, provided that the separate distribution of the
work based on the Library and of the other library facilities is
otherwise permitted, and provided that you do these two things:
� a) Accompany the combined library with a copy of the same
work based on the Library, uncombined with any other library
facilities. This must be distributed under the terms of the
Sections above.
� b) Give prominent notice with the combined library of the
fact that part of it is a work based on the Library, and explaining
where to find the accompanying uncombined form of the same
work.
8. You may not copy, modify, sublicense, link with, or distribute
the Library except as expressly provided under this License. Any
attempt otherwise to copy, modify, sublicense, link with, or
distribute the Library is void, and will automatically terminate
your rights under this License. However, parties who have
received copies, or rights, from you under this License will not
have their licenses terminated so long as such parties remain in
full compliance.
9. You are not required to accept this License, since you have
not signed it. However, nothing else grants you permission to
modify or distribute the Library or its derivative works. These
actions are prohibited by law if you do not accept this License.
Therefore, by modifying or distributing the Library (or any work
based on the Library), you indicate your acceptance of this
License to do so, and all its terms and conditions for copying,
distributing or modifying the Library or works based on it.
10. Each time you redistribute the Library (or any work based
on the Library), the recipient automatically receives a license
100
