michael@0: VPATH = foo bar
michael@0: 
michael@0: $(shell \
michael@0: mkdir bar; touch bar/test.source; \
michael@0: sleep 2; \
michael@0: mkdir foo; touch foo/tfile1; \
michael@0: touch bar/tfile2 bar/tfile3 bar/test.objtest; \
michael@0: )
michael@0: 
michael@0: all: tfile1 tfile2 tfile3 test.objtest test.source
michael@0: 	test "$^" = "foo/tfile1 bar/tfile2 bar/tfile3 bar/test.objtest bar/test.source"
michael@0: 	@echo TEST-PASS
michael@0: 
michael@0: tfile3: test.objtest
michael@0: 
michael@0: %.objtest: %.source
michael@0: 	test "$<" = bar/test.source
michael@0: 	test "$@" = test.objtest