-# SYSTEM = -Aa -D_HPUX_SOURCE -Dhpux # for HP-UX (obsolete)
-# SYSTEM = -DSYSV -Ae # for HP-UX
-# INCL = -I/usr/include/X11R5 # for HP-UX and others
-# INCL = -I/usr/local/X11/include # for SunOS and others
-# LIBS = -L/usr/lib/X11R5 -lXpm -lX11 -lm
-# # for HP-UX and others
-# LIBS = -L/usr/local/X11/lib -lXpm -lX11 -lm -lsocket -R/usr/local/X11/lib
-# # for SunOS and others
+# OPTIONS = $(DEBUG) -Wall # only for debugging purposes
+OPTIONS = $(DEBUG) -O3 -Wall # only for debugging purposes
+# OPTIONS = $(DEBUG) -Wall -ansi -pedantic # only for debugging purposes
+# OPTIONS = -O3 -Wall -ansi -pedantic
+# OPTIONS = -O3 -Wall
+# OPTIONS = -O3
+# OPTIONS = -DSYSV -Ae # may be needed for HP-UX