2017-06-26 16:08:49 (8.82 KB/s) - Read error at byte 10119560/24112160 (Connection timed out). Giving up.

Download failed.
No more mirrors to try - giving up.
Makefile:53: recipe for target ‘/home/fly/workdir/LinkltSmart7688Duo-20170626/openwrt/dl/gdb-linaro-7.6-2013.05.tar.bz2‘ failed
make[3]: *** [/home/fly/workdir/LinkltSmart7688Duo-20170626/openwrt/dl/gdb-linaro-7.6-2013.05.tar.bz2] Error 2
make[3]: Leaving directory ‘/home/fly/workdir/LinkltSmart7688Duo-20170626/openwrt/toolchain/gdb‘
toolchain/Makefile:81: recipe for target ‘toolchain/gdb/prepare‘ failed
make[2]: *** [toolchain/gdb/prepare] Error 2
make[2]: Leaving directory ‘/home/fly/workdir/LinkltSmart7688Duo-20170626/openwrt‘
toolchain/Makefile:80: recipe for target ‘/home/fly/workdir/LinkltSmart7688Duo-20170626/openwrt/staging_dir/toolchain-mipsel_24kec+dsp_gcc-4.8-linaro_uClibc-0.9.33.2/stamp/.toolchain_install‘ failed
make[1]: *** [/home/fly/workdir/LinkltSmart7688Duo-20170626/openwrt/staging_dir/toolchain-mipsel_24kec+dsp_gcc-4.8-linaro_uClibc-0.9.33.2/stamp/.toolchain_install] Error 2
make[1]: Leaving directory ‘/home/fly/workdir/LinkltSmart7688Duo-20170626/openwrt‘
/home/fly/workdir/LinkltSmart7688Duo-20170626/openwrt/include/toplevel.mk:181: recipe for target ‘world‘ failed
make: *** [world] Error 2

https://github.com/MediaTek-Labs/linkit-smart-7688-feed编译失败