1
 2.SECONDEXPANSION:
 3
 4all: hello.tsk
 5dep1:=hello.o
 6dep2:=hello.h
 7hello.tsk: $$(dep1)
 8hello.tsk: $$(dep2); $(info $@ from $^)
 9hello.o:; $(info $@)
10hello.h:; $(info $@)