SRC_DIR := common
ifeq ($(CONFIG_BSP_USING_GPIO),y)
SRC_DIR += gpio
endif
ifeq ($(CONFIG_BSP_USING_UART),y)
SRC_DIR += uart
ifeq ($(CONFIG_BSP_USING_EXTMEM),y)
SRC_DIR += extmem
include $(KERNEL_ROOT)/compiler.mk