Maven编译Hadoop的trunk项目报错:exec (compile-proto)

解决方法：

1，http://protobuf.googlecode.com/files/protobuf-2.4.1.tar.gz 下载

解压，进目录
./configure --prefix=/usr/local
make
make check
sudo make install

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib

还是来张图：