Your system might not be equipped with OpenGL support, comment out the OPENGL definitions at the start of the Makefile.

	@echo 
	@echo "  Toplevel makefile for Otools version" `cat version`
	@echo
	@echo "  CFLAGS=-DDEBUG_OTOOLS	Add to get debug printouts"
	@echo
	@echo "  help			This help text"
	@echo "  all			Make everything"
	@echo "  lib			Make the otools library only"
	@echo "  test			Make the test programs"
	@echo "  prog			Make the applications"
	@echo "  docs			Make the html docs"
	@echo "  clean			Cleanup the sourcetree"
	@echo