They have a site covering compatibility with MSVC: http://clang.llvm.org/docs/MSVCCompatibility.html http://clang.llvm.org/docs/MSVCCompatibility.html I think

They have a site covering compatibility with MSVC: http://clang.llvm.org/docs/MSVCCompatibility.html http://clang.llvm.org/docs/MSVCCompatibility.html I think it's pretty acceptable, if you're writing C. As you can see, C++ support is only partially completed (no exceptions!). But you're right, Clang on Windows gets constantly improved. The creation of good debugging information (MSVC's /Zi or even /ZI option) is also missing. For a first class citizen, support of the (undocumented) PDB format is a requirement in my opinion.