BOARD_TYPE=ark1668ed_devb BOOTSTRAP_DIR=ark1668ed_board UBOOT_CONFIG_FILE=ark1668ed_devb_defconfig LINUX_CONFIG_FILE=ark1668ed_devb_defconfig BR_CONFIG_FILE=ark1668ed_devb_defconfig DTB_FILE_NAME=ark1668ed_devb.dtb TOOLCHAIN_CROSS_COMPILE=arm-none-linux-gnueabihf-
