问题：
g++-4.6 : Depends: libstdc++6-4.6-dev (= 4.6.3-1ubuntu5) but it is not going to be installed
libstdc++6-4.6-dbg : Depends: libgcc1-dbg but it is not going to be installed
Recommends: libstdc++6-4.6-dev (= 4.6.3-1ubuntu5)
。。。。
解决方案：
sudo apt-get install libstdc++6-4.6-dev libgcc1-dbg