SRCDIR=..
VPATH=$(SRCDIR)

SOURCE=$(SRCDIR)/A.IN $(SRCDIR)/MixEd.ext $(SRCDIR)/lower.x $(SRCDIR)/upper.X

all: ci cs

# Case insensitive targets
ci: a.out mixed.out

# Case sensitive targets
cs: lower.out upper.out
cs: Hello HELLO

# Begin case-insensitive rules
prep::
	touch $(SRCDIR)/A.IN
	touch $(SRCDIR)/MixEd.ext
%.out: %.in
	cp $< $@
mixed.out: mixed.ext
	cp $< $@

# Begin case-sensitive rules
prep::
	touch $(SRCDIR)/lower.x
	touch $(SRCDIR)/upper.X
%.out: %.x
	@echo Using lower-case rule
	cp $< $@
%.out: %.X
	@echo Using upper-case rule
	cp $< $@
Hello:
	@echo $@
HELLO:
	@echo $@

clean:
	rm -f *.out

distclean: clean
	rm -f $(SOURCE)