Which g++ compiler for potato packages?

[Peter S Galbraith <GalbraithP@dfo-mpo.gc.ca>]

I'm running slink, but figure I must update my compiler
environment and update my potato packages.

In particular, I have a g++ packages called gri.
I notice that there a several g++ dev packages in potato:

            libstdc++2.9-glibc2.1-dev 2.91.66-1   (227.6k) 
            libstdc++2.9-dev 2.91.61-1   (225.7k) 
            libstdc++2.9-dev 2.91.60-4   (225.7k) 

Should I use libstdc++2.9-glibc2.1-dev ?

BTW, I had compiled the alpha version myself on faure.  I now see
that was a mistake since it probably also has the wrong libraries.

Thanks,
Peter