当我为 RPI 构建 root 时，在最后一步，当我输入 make 时，它返回一个错误，
jin@ubuntu:~/buildroot-rpi$ make
--2014-06-06 17:53:26-- http://www.metrological.com/rpi/arm-raspberrypi-linux-gnueabi_x86_64_gcc4.7.2.tar.gz
Resolving www.metrological.com... 199.27.74.175
Connecting to www.metrological.com|199.27.74.175|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2014-06-06 17:53:27 ERROR 404: Not Found.
--2014-06-06 17:53:27-- http://sources.buildroot.net//arm-raspberrypi-linux-gnueabi_x86_64_gcc4.7.2.tar.gz
Resolving sources.buildroot.net... 176.9.16.109
Connecting to sources.buildroot.net|176.9.16.109|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2014-06-06 17:53:28 ERROR 404: Not Found.
make: *** [/home/jin/buildroot-rpi/dl/arm-raspberrypi-linux-gnueabi_x86_64_gcc4.7.2.tar.gz] Error 1
如何解决这个问题，谢谢。