If you still have trouble try to build a new one from source or extract a deb(it is much easier eg:
ar p $DEB.deb data.tar.gz|tar zx). Put the extracted libary(under usr/lib) in your game folder and use the LD_LIBRARY_PATH- or LD_PRELOAD-variable to start your game.
Sorry, I don't have a Gentoo machine currently available, so I can't check it personally. The RPM contains prebuilt stdc++.so.2.8.0, just extract the package. I've tested it with Ubuntu and it works flawlessly.
Forum topic: Dependecies no more available in Ubuntu
you can find precompiled libs on their sf page (SFML-1.5-dev-linux-32.tar.gz), download and extract the lib folder to your game path, start your game with
which is a bsd binary - bsd binaries dosnt work on a pure linux
system. the rpm is linked in the text
libsmfl-graphics.1.5 is no more available in the Ubuntu repositories.
Symbolic link with version 1.6 doesn't help
I run it from binary tarball. About what RPM do you speak?