You can use any arm32 ELF/GNU/musl toolchain. 1.build mmc make CROSS_COMPILE=arm-none-eabi- p=sun8iw20p1 mmc 2.build nand make CROSS_COMPILE=arm-none-eabi- p=sun8iw20p1 nand 3.build spinor make CROSS_COMPILE=arm-none-eabi- p=sun8iw20p1 spinor 4.build fes make CROSS_COMPILE=arm-none-eabi- p=sun8iw20p1 fes