49
EN
to copy from a designated place, then offering equivalent
access to copy the source code from the same place
satisfi es 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 fi le 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 signifi cant 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
defi ned by law.
If such an object fi le 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 fi le 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 modifi cation of the
work for the customer’s own use and reverse engineering
for debugging such modifi cations.
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 modifi ed executable containing
the modifi ed Library. (It is understood that the user
who changes the contents of defi nitions fi les in the
Library will not necessarily be able to recompile the
application to use the modifi ed defi nitions.)
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 modifi ed version of the library,
if the user installs one, as long as the modifi ed 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
specifi ed 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 specifi ed 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 fi nd 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