Can you switch from CLang back to gcc in FreeBSD 10.0

[Frank Leonhardt]

I've been dreading this for over a year now. It's going to reach 
critical soon. FreeBSD 10 is dropping gcc in favour of Clang (because 
the current version of gcc is GPL 3, which is too incompatible with the 
BSD license/philosophy - a debate for elsewhere).

gcc is still available in ports, and as it's not having to be part of 
the base system, I hope it'll be a newer version.

My question is: Can I dump CLang and replace it with gcc and re-compile 
everything once it's installed?

Supplementary question: Does anyone have the runes?

Thanks, Frank.