1 Method
1.1 Export cross compiler
export PATH=$PATH:/usr/local/arm_linux_4.8/bin/
1.2 Compile uboot
make disclean
make nuc980_eth2uart_defconfig
make
2 Output file
root@vmuer-VirtualBox:/home/vmuer/tmp/nuc980bsp/u-boot-2016.11# ls spl/u-boot-spl.bin
root@vmuer-VirtualBox:/home/vmuer/tmp/nuc980bsp/u-boot-2016.11# ls u-boot.bin