This feeds holds the UBoot bootloader source code for the LinkIt Smart 7688 (Duo)
Start by cloning the tree
git clone https://github.com/MediaTek-Labs/linkit-smart-uboot.git
We need to install the cross toolchain required to build the source
sudo tar xjf buildroot-gcc342.tar.bz2 -C /opt/
Finally we can start building the source
make
Notes: Uboot firmware is uboot.bin NOT uboot.img