LIB = $(obj)libdts.o
+ifeq ($(DEVICE_TREE),)
$(if $(CONFIG_DEFAULT_DEVICE_TREE),,\
$(error Please define CONFIG_DEFAULT_DEVICE_TREE in your board header file))
DEVICE_TREE = $(subst ",,$(CONFIG_DEFAULT_DEVICE_TREE))
+endif
$(if $(CONFIG_ARCH_DEVICE_TREE),,\
$(error Your architecture does not have device tree support enabled. \