15.05.1
3.18.109
mt7688 LinkIt Smart 7688
3.1.0
(1) set path of cross compile, for example : PATH=$PATH:/home/ai7688/1208/AI7688H_OpenWRT_Build_FW_Setting_Tool_V1.0/openwrt/staging_dir/toolchain-mipsel_24kec+dsp_gcc-4.8-linaro_uClibc-0.9.33.2/bin
(2) make