I think he refers to this http://clang.llvm.org/docs/Modules.html See also http://isocpp.org/blog/2012/11/modules-update-on-work-in-pro...
I am not sure how to navigate that site, but it does not look like modules are planned for C++14. At least C++17 according to the picture on this page: http://isocpp.org/std/status