Windows build problems for LLVM 3.1

Attempting to use VC++ 2008 Express, when I try to link a test program, I get a bunch of symbols like __imp_open not found. Attempting to use VC++ 2010 Express, I get "Solution Folders are not supported" so, although it will build, there's no way to build the INSTALL target.

- Paul

With VS 2010, you could try building with the -DLLVM_USE_FOLDERS=OFF option.