Comment 1 for bug 1543876

It's Steams fault. They ship old libs and it clashes with Mesa requirements/dependencies.

https://github.com/ValveSoftware/steam-for-linux/issues/3801

A long fix here:
https://wirejungle.wordpress.com/2015/01/09/how-to-fix-broken-steam-linux-client-with-radeon-graphics-driver-workaround/

The quick fix is to rename the 'libstdc++.so.6' that lives under the steam-runtime folder.

cd $HOME/.steam/ubuntu12_32/steam-runtime/i386/usr/lib/i386-linux-gnu
mv libstdc++.so.6 libstdc++.so.6.bak
cd $HOME/.steam/ubuntu12_32/steam-runtime/amd64/usr/lib/x86_64-linux-gnu
mv libstdc++.so.6 libstdc++.so.6.bak

I'm not very knowledgable on deb packages but I'm sure it could be fixed with an updated deb that lives in a Mint repo.