+# DEBUG = -DDEBUG -g -Wall -ansi -pedantic
+DEBUG = -DDEBUG -g -Wall
+# DEBUG = -O3 -Wall -ansi -pedantic
+# DEBUG = -O3 -Wall
+# DEBUG = -O3
+
+# 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
+
+# LIBS = -L/usr/X11R6/lib -lXpm -lX11 -lm
+# LIBS = -L/usr/X11R6/lib -lX11 -lm