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December 11, 2001
The FLTK library and included programs are provided under the terms
of the GNU Library General Public License (LGPL) with the following
1. Modifications to the FLTK configure script, config
header file, and makefiles by themselves to support
a specific platform do not constitute a modified or
The authors do request that such modifications be
contributed to the FLTK project - send all
contributions to "firstname.lastname@example.org".
2. Widgets that are subclassed from FLTK widgets do not
constitute a derivative work.
3. Static linking of applications and widgets to the
FLTK library does not constitute a derivative work
and does not require the author to provide source
code for the application or widget, use the shared
FLTK libraries, or link their applications or
widgets against a user-supplied version of FLTK.
If you link the application or widget to a modified
version of FLTK, then the changes to FLTK must be
provided under the terms of the LGPL in sections
1, 2, and 4.
4. You do not have to provide a copy of the FLTK license
with programs that are linked to the FLTK library, nor
do you have to identify the FLTK license in your
program or documentation as required by section 6
of the LGPL.
However, programs must still identify their use of FLTK.
The following example statement can be included in user
documentation to satisfy this requirement:
[program/widget] is based in part on the work of
the FLTK project (http://www.fltk.org).