> To build a library with libstdc++ and link it with an application that has been built with libc++, there would (among other things) have to be a common string

> To build a library with libstdc++ and link it with an application that has been built with libc++, there would (among other things) have to be a common string type that they agree on. well, then there would be a single standard library implementation. I think that would be the way to go : just put libc++ out of the std namespace and in a custom namespace, `st2` for instance, and use its types from everywhere. MSVC, GCC, whatever.