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