This code is separated from qsdk and partially modified from the Makefile.
Select a compiled openwrt tree, clone the code to the openwrt/package/
directory, and execute "make menuconfig" to configure it.
Target System (Atheros AR7xxx/AR9xxx) --->
Subtarget (Generic) --->
Boot Loaders --->
<*> GL-uboot-ar750s.................... U-boot for AR750S
Target System (Atheros AR7xxx/AR9xxx) --->
Subtarget (Generic) --->
Boot Loaders --->
<*> GL-uboot-ar750.......................... U-boot for AR750S
Target System (Atheros AR7xxx/AR9xxx) --->
Subtarget (Generic) --->
Boot Loaders --->
<*> GL-uboot-x750-4g.................... U-boot for x750-4g
make package/uboot-gl-ar750-ar750s-x750/{clean,compile} V=s
The compiled binary is in the openwrt/bin/targets/ar71xx/generic/ directory