How to support C++ in a new OS

[Yuxin Ren]

Hi,

Now I want to support C++ in our research operating system, which is
written from "bare metal". So it does not have compatible system
interface with Linux, but it has a large part of standard C library.
As I am still a very beginner in both OS and programming language. I
do not clearly know how I can achieve this.
In general, what steps do I need?
I am very confused about the relationship among compiler (gcc),
libraries (libgcc, libstdc++, libc and so on) and OS.

Thanks a lot.
Yuxin