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# # The $(root ...) and $(notroot ) functions. # x := $(root /a) y := $(notroot /a) ifneq ($x,/) $(error x=$x) endif ifneq ($y,a) $(error y=$y) endif x := $(root /a /b /) y := $(notroot /a /b /) ifneq ($x,/ / /) $(error x=$x) endif ifneq ($y,a b .) $(error y=$y) endif # dummy all: echo The root and notroot functions works.