how to add a new file to libstdc++ ?

[Marek Zuk]

I study computer science at the Warsaw University of Technology and
I'm in the final year of my studies. Now I'm working on my final
project.
I'm going to develop libstdc++, but  I'm relatively new at gcc. I've
just installed gcc 4.2.0 and I'm doing my first changes in STL.

I added new file to include/c++/bits directory, but I cannot use it in
my program (#include doesn't work). How to add new files with
templates to my own copy of STL?

The second thing is I'd like to use the standard red-black tree
templates that are in bits directory, but - as I know - they are not
in STL interface.
How can I use them in my programs?

Thanks in advance.

Marek Zuk