Clang with Microsoft CodeGen in VS 2015 Update 1
One of the challenges with developing and maintaining cross-platform C++ code is dealing with different C++ compilers for different platforms. You write some code that builds fine with the Visual C++ compiler for your Windows-targeting build, but then your Android-targeting build breaks because Clang is stricter about standards conformance and your code was accidentally depending on Visual C++ being more permissive. Or, you write new code that builds successfully with Clang for iOS, only to find out that you used a relatively new C++ language feature that Visual C++ does not yet support, and now you have to either re-implement the code without using that language feature, or maintain a separate implementation that works with Visual C++ for your Windows build.
To make it easier to develop cross-platform code that works well for both Windows and other platforms, we’ve released an additional compiler toolset for Visual Studio called Clang with Microsoft CodeGen.