GSoC Qualification Test: Xiaozhong Ma

1) First I installed *gcc-arm-linux-gnueabi* on Xununtu.

  `sudo apt-get install gcc-arm-linux-gnueabi`

2) Then I compiled my *helloworld.c* file.

  `make CC=arm-linux-gnueabi-gcc`

3) Finally, I tested *helloworld.bin* on a Raspberry Pi. And it works properly.