This isn't even compilers. clang is perfectly happy using other peoples std library implementations(well libstdc++ and MS STL's that I know of so far). I thin

This isn't even compilers. clang is perfectly happy using other peoples std library implementations(well libstdc++ and MS STL's that I know of so far). I think it is more apt to say that you do not mix libraries with the same names here, or in this case don't mix std library implementations.