> I worry what else is lurking in libc++ implementations that implies dependencies on things that aren't exactly portable... You do realize that the C++ runtim

> I worry what else is lurking in libc++ implementations that implies dependencies on things that aren't exactly portable... You do realize that the C++ runtime library is always a system or compiler supplied non-portable library? Just like the C library is also highly non-portable. It uses system-specific syscalls all over the place.