I think some compilers already have modules as a language extension (not very portable though) http://clang.llvm.org/docs/Modules.html#includes-as-imports http

I think some compilers already have modules as a language extension (not very portable though) http://clang.llvm.org/docs/Modules.html#includes-as-imports http://clang.llvm.org/docs/Modules.html#includes-as-imports I have been in projects where a full build would be around an hour but mostly because the dependencies. That said, I seldom performed a full rebuild so it wasn't a huge deal for me. The major hassle is to wait for the build machine when you are sending a version to QA.