HaXe and HaXeNME come pretty close. Especially NME with which you can create GUIs and games compile to c++, compile to html5 using jeash, create native phone apps, and compile SWFs all from the same code. With HaXe itself the code usually needs a bit of modifying depending on the target. They added java recently to it which is not yet available for NME. If anything; it's fun to play with.