1
 2VPATH = t1
 3include rules.mk
 4.PHONY: all
 5all: foo.x
 6foo.x : rules.mk ; @echo MYVAR=$(MYVAR) FOOVAR=$(FOOVAR) ALLVAR=$(ALLVAR)
 7all: ALLVAR = xxx
 8foo.x: FOOVAR = bar
 9rules.mk : MYVAR = foo
10.INTERMEDIATE: foo.x rules.mk