+# If you do not have a vfork system call or do not support
+# job control, you must change the definition of OPTIONS.
+#
+
+OPTIONS= -DV7 -DVMUNIX # vfork and job control
+#OPTIONS= -DV7 # no vfork or no job control
+
+LDFLAGS= -i # for separate I/D machines
+#LDFLAGS= -n # for nonseparate I/D machines
+
+CFLAGS= -O ${OPTIONS} ${INCLUDES} # for separate I/D machines
+#CFLAGS= -O -V ${OPTIONS} ${INCLUDES} # for nonseparate I/D machines
+
+LIBES= -ljobs -lc # for separate I/D machines
+#LIBES= -lovjobs -lovc # for nonseparate I/D machines
+
+SIGRETROSRC= # for those with job control
+SIGRETROOBJ= # for those with job control
+#SIGRETROSRC= sigretro.c # for those without job control
+#SIGRETROOBJ= sigretro.o # for those without job control