There is a proposal to add modules to the C++ standard.
This builds on a much earlier proposal in 2006 by Daveed Vandevoorde
Microsoft has done an early implementation in Visual Studio 2015 Update 1 (because the authors of the new module proposal package work at Microsoft)
I’m not terribly excited about some parts of their proposal and implementation. But I should play with it. So. I will play with it. Update to come.