Backporting LLVM 3.1 for Fedora 17

[Kevin Kofler]

Kalev Lember wrote:
> I am a strong believer that new features should only be introduced in
> new Fedora releases. This is why we have releases after all: so that
> people could choose when they get new features. If they want
> stability [1], they can choose not to upgrade; if they want new features
> (new LLVM/Clang, new Mesa), they upgrade to a new Fedora release [2].

The issue here is that Clang can't compile ANY C++ program in Fedora 17 as 
it is now. This is not about introducing a feature, it's about making the 
software we ship actually WORK.

        Kevin Kofler