编译OpenWrt失败

/home/fly/work_dir/OpenWrt-SDK/OpenWrt-Test/trunk/scripts/download.pl "/home/fly/work_dir/OpenWrt-SDK/OpenWrt-Test/trunk/dl" "linux-3.18.18.tar.xz" "6fce868a56f2d83f80cdad5fed457110" "@KERNEL/linux/kernel/v3.x"
--2017-06-22 10:11:53-- ftp://ftp.all.kernel.org/pub/linux/kernel/v3.x/linux-3.18.18.tar.xz
=> '-'
Resolving ftp.all.kernel.org (ftp.all.kernel.org)... failed: Name or service not known.
wget: unable to resolve host address 'ftp.all.kernel.org'
Download failed.
--2017-06-22 10:12:06-- http://ftp.all.kernel.org/pub/linux/kernel/v3.x/linux-3.18.18.tar.xz
Resolving ftp.all.kernel.org (ftp.all.kernel.org)... failed: Name or service not known.
wget: unable to resolve host address 'ftp.all.kernel.org'
Download failed.
--2017-06-22 10:12:16-- ftp://ftp.all.kernel.org/pub/linux/kernel/v3.x/longterm/v3.18.18/linux-3.18.18.tar.xz
=> '-'
Resolving ftp.all.kernel.org (ftp.all.kernel.org)... failed: Name or service not known.
wget: unable to resolve host address 'ftp.all.kernel.org'
Download failed.
--2017-06-22 10:12:26-- http://ftp.all.kernel.org/pub/linux/kernel/v3.x/longterm/v3.18.18/linux-3.18.18.tar.xz
Resolving ftp.all.kernel.org (ftp.all.kernel.org)... failed: Name or service not known.
wget: unable to resolve host address 'ftp.all.kernel.org'
Download failed.
--2017-06-22 10:12:36-- http://mirror2.openwrt.org/sources/linux-3.18.18.tar.xz
Resolving mirror2.openwrt.org (mirror2.openwrt.org)... 46.4.11.11
Connecting to mirror2.openwrt.org (mirror2.openwrt.org)|46.4.11.11|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2017-06-22 10:12:45 ERROR 404: Not Found.

Download failed.
--2017-06-22 10:12:45-- http://downloads.openwrt.org/sources/linux-3.18.18.tar.xz
Resolving downloads.openwrt.org (downloads.openwrt.org)... 78.24.191.177
Connecting to downloads.openwrt.org (downloads.openwrt.org)|78.24.191.177|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2017-06-22 10:12:50 ERROR 404: Not Found.

Download failed.
No more mirrors to try - giving up.
make[3]: *** [/home/fly/work_dir/OpenWrt-SDK/OpenWrt-Test/trunk/dl/linux-3.18.18.tar.xz] Error 2
make[3]: Leaving directory `/home/fly/work_dir/OpenWrt-SDK/OpenWrt-Test/trunk/toolchain/kernel-headers'
make[2]: *** [toolchain/kernel-headers/prepare] Error 2
make[2]: Leaving directory `/home/fly/work_dir/OpenWrt-SDK/OpenWrt-Test/trunk'
make[1]: *** [/home/fly/work_dir/OpenWrt-SDK/OpenWrt-Test/trunk/staging_dir/toolchain-mips_34kc_gcc-4.8-linaro_musl-1.1.10/stamp/.toolchain_install] Error 2
make[1]: Leaving directory `/home/fly/work_dir/OpenWrt-SDK/OpenWrt-Test/trunk'
make: *** [world] Error 2