I just downloaded the CLang sources, made a Visual C++ 10 IDE workspace by using CMake, and built everything from Visual C++ 10.0 (express).
Now I get a bunch of linker
Clang/LLVM's supports for Windows are still not perfect. Try to include this option: -Xclang -cxx-abi -Xclang microsoft. But, I'm not sure whether it makes work correctly.
-Xclang -cxx-abi -Xclang microsoft