Installed clang++3.6 on Ubuntu, can't select as alternative

Question

I just installed clang++3.6 on my Ubuntu machine, but can\'t set it as the default c++ compiler.

sudo update-alternatives --config c++ 

tells

Answer 1

These work for me:

sudo update-alternatives --install /usr/bin/cc cc /usr/bin/clang-3.6 100
sudo update-alternatives --install /usr/bin/c++ c++ /usr/bin/clang++-3.6 100