Android Oreo Preview compile failed

Hi, Terry!

How to build Oreo?

Build U-Boot:

$ cd ~/project/khadas/mmallow/uboot
$ make CROSS_COMPILE=aarch64-linux-gnu- kvim_defconfig
$ make CROSS_COMPILE=aarch64-linux-gnu-

Build Android:

$ cd ~/project/khadas/mmallow
$ source build/envsetup.sh
$ lunch “target”
$ make -jN otapackage

What is “target” for Oreo?