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fltk(3)			   Library Functions Manual		       fltk(3)

NAME
       fltk - the fast light tool kit

SYNOPSIS
       The  Fast  Light	 Tool Kit ("FLTK") is a	cross-platform C++ GUI toolkit
       for UNIX(r)/Linux(r) (X11 and Wayland),	Microsoft(r)  Windows(r),  and
       macOS(r).   FLTK	 provides  modern  GUI functionality without bloat and
       supports	3D graphics via	OpenGL(r) and its built-in GLUT	emulation.  It
       was originally developed	by Mr. Bill Spitzak  and  is  currently	 main-
       tained  by  a small group of developers across the world	with a central
       repository on GitHub.

       FLTK is provided	under the terms	of the GNU Library General Public  Li-
       cense, 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:

		  https://www.fltk.org/bugs.php

	      2.  Widgets that are subclassed from FLTK	widgets	do not consti-
	      tute a derivative	work.

	      3. Static	linking	of applications	and widgets to	the  FLTK  li-
	      brary 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 documenta-
	      tion to satisfy this requirement:

	      [program/widget] is based	in  part  on  the  work	 of  the  FLTK
	      project (https://www.fltk.org).

SEE ALSO
       fltk-config(1), fluid(1)
       FLTK Programming	Manual
       FLTK Web	Site, https://www.fltk.org/

AUTHORS
       Bill Spitzak and	others.

6 January 2002		      Fast Light Tool Kit		       fltk(3)

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