External C++ Library on iPad

Hello, friends.
I'm trying to integrate Zinnia [1]  on my iPad proyect. But I don't know how
to integrate a C++ library to my Objective-C proyect.
I've seen some tutorials on genereic integration of C++ and Objective-C++.
Can anyone help me? I'm quite lost.
Thanks.

[1] http://zinnia.sourceforge.net/