Compile for amlogic?

I have an old M8S S812 box.

OS: Android 4.4

CPU: Amlogic S812 Quad core Cortex A9r4 2.0 GHz.

GPU: Octa-core Mali-450MP GPU @ 600MHz.

RAM: 2GB DDR3; ROM: 8GB EMMC.

I notice that the Github had amlogic. With RPi3, I would do "PROJECT=RPi2 ARCH=arm". How do I compile for amlogic?

Thanks

Thanks