[account42]

> but it's not possible to use clang's standard library with GCC

Of course it is. Both libc++ and GCC do make the effort to keep that compatibility going.

> in a standard conforming way

What is that supposed to mean here? GCC doesn't let you simply specify -stdlib=libc++ but while it's unfortunate it just means that you have to use -nostdlib++ and add the libc++ include and linking flags manually.

> There are some hacks that let you use some parts of libc++ with GCC by using the nostdlib flag, but this disables a lot of C++ functionality such as exception handling, RTTI, type traits. These features are in turn used by things like std::vector, std::map, etc... so you won't be able to use those classes either, and so on so forth...

-nostdlib++ is not a hack but the documented way for using a different standard library implementation. This doesn't prevent you from using exceptions and other runtime functionality.