+LESSONS = files editor morefiles macros eqn C
+
+FILES = lrndef lrnref \
+ copy.c dounit.c learn.c list.c \
+ makpipe.c maktee.c mem.c mysys.c selsub.c selunit.c \
+ start.c whatnow.c wrapup.c \
+ lcount.c tee.c \
+ makefile
+
+OBJECTS = copy.o dounit.o learn.o list.o mem.o \
+ makpipe.o maktee.o mysys.o selsub.o selunit.o \
+ start.o whatnow.o wrapup.o
+
+CFLAGS = -O
+LIBRARY =
+LLIB = $(DESTDIR)/usr/lib/learn
+
+all: learn tee lcount
+
+install: all
+ install -s learn $(DESTDIR)/usr/bin
+ install -s tee $(LLIB)
+ install -s lcount $(LLIB)
+ rm *.o
+ @echo "Now do 'make lessons' if you need to extract the lesson archives"
+ @echo "Then do 'make play; make log' to make playpen and log directories"
+
+cmp: all
+ cmp learn /bin/learn
+ cmp tee $(LLIB)/tee
+ cmp lcount $(LLIB)/lcount
+ rm learn tee lcount *.o
+
+learn: $(OBJECTS)
+ cc -o learn $(CFLAGS) $(OBJECTS) $(LIBRARY)
+
+$(OBJECTS): lrnref
+learn.o: lrndef
+
+lcount tee:
+ cc $(CFLAGS) $@.c -o $@ $(LIBRARY)
+
+lessons: $(LESSONS)
+
+$(LESSONS):
+ -rm -r $(LLIB)/$@
+ mkdir $(LLIB)/$@
+ (cd $(LLIB)/$@; ar x ../$@.a)
+
+play log:
+ -rm -r $(LLIB)/$@; mkdir $(LLIB)/$@; chmod +w $(LLIB)/$@
+
+check:
+ -@test -r $(LLIB)/tee || echo 'tee not present; make tee'
+ -@test -r $(LLIB)/lcount || echo 'lcount not present; make lcount'
+ -@test -r $(LLIB)/play || echo 'play directory not present; make play'
+ -@test -r $(LLIB)/log || echo 'log directory not present; make log'
+ -@for i in $(LESSONS); do test -r $(LLIB)/$$i/L0 || echo $$i not unarchived, make $$i; done