[ -f $$(word 1,$$^) -a -f $$(word 2,$$^) ]
$$(call concat_cmd,$(if $(IMAGE/$(2)/$(1)),$(IMAGE/$(2)/$(1)),$(IMAGE/$(2))))
+ .IGNORE: $(BIN_DIR)/$(call IMAGE_NAME,$(1),$(2))
$(BIN_DIR)/$(call IMAGE_NAME,$(1),$(2)): $(KDIR)/$(call IMAGE_NAME,$(1),$(2))
cp $$^ $$@