michael@0: $(shell \
michael@0: mkdir -p src/subd; \
michael@0: mkdir subd; \
michael@0: touch dummy; \
michael@0: sleep 2; \
michael@0: touch subd/test.out src/subd/test.in2; \
michael@0: sleep 2; \
michael@0: touch subd/test.out2 src/subd/test.in; \
michael@0: sleep 2; \
michael@0: touch subd/host_test.out subd/host_test.out2; \
michael@0: sleep 2; \
michael@0: touch host_prog; \
michael@0: )
michael@0: 
michael@0: VPATH = src
michael@0: 
michael@0: all: prog host_prog prog dir/
michael@0: 	test "$@" = "all"
michael@0: 	test "$<" = "prog"
michael@0: 	test "$^" = "prog host_prog dir"
michael@0: 	test "$?" = "prog host_prog dir"
michael@0: 	test "$+" = "prog host_prog prog dir"
michael@0: 	test "$(@D)" = "."
michael@0: 	test "$(@F)" = "all"
michael@0: 	test "$(<D)" = "."
michael@0: 	test "$(<F)" = "prog"
michael@0: 	test "$(^D)" = ". . ."
michael@0: 	test "$(^F)" = "prog host_prog dir"
michael@0: 	test "$(?D)" = ". . ."
michael@0: 	test "$(?F)" = "prog host_prog dir"
michael@0: 	test "$(+D)" = ". . . ."
michael@0: 	test "$(+F)" = "prog host_prog prog dir"
michael@0: 	@echo TEST-PASS
michael@0: 
michael@0: dir/:
michael@0: 	test "$@" = "dir"
michael@0: 	test "$<" = ""
michael@0: 	test "$^" = ""
michael@0: 	test "$(@D)" = "."
michael@0: 	test "$(@F)" = "dir"
michael@0: 	mkdir $@
michael@0: 
michael@0: prog: subd/test.out subd/test.out2
michael@0: 	test "$@" = "prog"
michael@0: 	test "$<" = "subd/test.out"
michael@0: 	test "$^" = "subd/test.out subd/test.out2" # ^
michael@0: 	test "$?" = "subd/test.out subd/test.out2" # ?
michael@0: 	cat $<
michael@0: 	test "$$(cat $<)" = "remade"
michael@0: 	test "$$(cat $(word 2,$^))" = ""
michael@0: 
michael@0: host_prog: subd/host_test.out subd/host_test.out2
michael@0: 	@echo TEST-FAIL No need to remake
michael@0: 
michael@0: %.out: %.in dummy
michael@0: 	test "$@" = "subd/test.out"
michael@0: 	test "$*" = "subd/test"              # *
michael@0: 	test "$<" = "src/subd/test.in"       # <
michael@0: 	test "$^" = "src/subd/test.in dummy" # ^
michael@0: 	test "$?" = "src/subd/test.in"       # ?
michael@0: 	test "$+" = "src/subd/test.in dummy" # +
michael@0: 	test "$(@D)" = "subd"
michael@0: 	test "$(@F)" = "test.out"
michael@0: 	test "$(*D)" = "subd"
michael@0: 	test "$(*F)" = "test"
michael@0: 	test "$(<D)" = "src/subd"
michael@0: 	test "$(<F)" = "test.in"
michael@0: 	test "$(^D)" = "src/subd ."          # ^D
michael@0: 	test "$(^F)" = "test.in dummy"
michael@0: 	test "$(?D)" = "src/subd"
michael@0: 	test "$(?F)" = "test.in"
michael@0: 	test "$(+D)" = "src/subd ."          # +D
michael@0: 	test "$(+F)" = "test.in dummy"
michael@0: 	printf "remade" >$@
michael@0: 
michael@0: %.out2: %.in2 dummy
michael@0: 	@echo TEST_FAIL No need to remake
michael@0: 
michael@0: .PHONY: all