Extracted from openwrt BSP. For studying package build.
It needs to adjust 2 of Makefile.
rtl8812au 0bda:8812
5.4.154
mt7688 LinkIt Smart 7688
v4.3.14_13455.20150212_BTCOEX20150128-51
untar
copy rtl8812au-ct/ to openrt/package/kernel
make openrt/package/kernel/rtl8812au-ct/compile V=s
rtl8812au.ko at
openwrt/staging_dir/target-mipsel_musl/root-ramips/lib/modules/5.4.154/
#vi /etc/hostapd.conf
interface=wlan2
driver=nl80211
ssid=greatcat7
hw_mode=g
channel=1
bridge=br-lan
hostapd -d -B /etc/hostapd.conf &
#PC Wifi find a AP named greatcat7
#PC login AP and get IP 192.168.1.x