According to fptools/libraries/GLUT/Graphics/UI/GLUT.hs, the documentation of the GLUT package is derived from a document with the notice > Copyright (c) 1994, 1995, 1996 by Mark J. Kilgard, Silicon Graphics, Inc. > No part of this documentation may be reproduced, in any form or by any > means, without permission in writing from the original author. Do you have this permission, and if so what are its limits?