NEWER = $(eval 4 := $(call TSTAMP,$(dir $2)$1))
NEWER += $(eval 5 := $(call TSTAMP,$2))
NEWER += $(if $(filter $5,$(firstword $(sort $4 $5))),$1,$2)
NEWER = $(eval 4 := $(call TSTAMP,$(dir $2)$1))
NEWER += $(eval 5 := $(call TSTAMP,$2))
NEWER += $(if $(filter $5,$(firstword $(sort $4 $5))),$1,$2)