从 OpenWrt 的 SDK 编译
# 以 ar71xx 平台为例
tar xJf openwrt-sdk-18.06.1-ar71xx-tiny_gcc-7.3.0_musl.Linux-x86_64.tar.xz
cd openwrt-sdk-*-ar71xx-*
# 获取 precompiled-feeds Makefile
git clone https://github.com/honwen/openwrt-precompiled-feeds.git package/precompiled
# 选择要编译的包
make menuconfig
# 开始编译
make package/precompiled/compile V=99