For an eventual u-boot-installer, how do you install u-boot on wandboard?

And how do we detect that we have to use this kind of installation method based on u-boot's .config ?

For comparison, for sunxi, it's:

.config contains CONFIG_SYS_SOC="sunxi" => install via "dd if=u-boot-sunxi-with-spl.bin of=/dev/sdX bs=1024 seek=8".