$(if $(CONFIG_ARCH_DEVICE_TREE),,\
$(error Your architecture does not have device tree support enabled. \
Please define CONFIG_ARCH_DEVICE_TREE))
# We preprocess the device tree file provide a useful define
$(if $(CONFIG_ARCH_DEVICE_TREE),,\
$(error Your architecture does not have device tree support enabled. \
Please define CONFIG_ARCH_DEVICE_TREE))
# We preprocess the device tree file provide a useful define