[jeroenhd]

Other compilers support modules in varying ways as well, but there's no universal module "std" yet.

Clang also requires some more command line flags to build modules it seems and g++ needs a command line flag to enable module support as well.

Microsoft's compiler seems to have the best language support in many areas, but seems to fail in others (notably the "core language features"). Then again, the standard isn't finished yet.

If I were to write a program in modern C++ I'd go for the Microsoft compiler. The open source and free implementations are clearly not capable of keeping up with a commercial software powerhouse when it comes to a complicated language like C++.