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 fltk(3)                       6 January 2002                        fltk(3)
                             Fast Light Tool Kit

      fltk - the fast light tool kit

      The Fast Light Tool Kit ("FLTK", pronounced "fulltick") is a C++
      graphical user interface toolkit for the X Window System, MacOS(r), and
      Microsoft Windows(r) that supports OpenGL(r).  It was originally
      developed by Mr. Bill Spitzak and is currently maintained by a small
      group of developers across the world with a central repository in the
      US.  FLTK is provides under the terms of the GNU Library General Public
      License, with the following exceptions:

           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 derivative work.

           The authors do request that such modifications be contributed to
           the FLTK project - send all contributions through the "Software
           Trouble Report" on the following page:


           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

      fltk-config(1), fluid(1)
      FLTK Programming Manual

                                    - 1 -       Formatted:  December 9, 2021

 fltk(3)                       6 January 2002                        fltk(3)
                             Fast Light Tool Kit

      FLTK Web Site,

      Bill Spitzak and others.

                                    - 2 -       Formatted:  December 9, 2021