Means your G++ installation is bad. Somehow the “libstdc++.so.version” file gone mia, possibly due to mixed updates to the system.
Solutions include downgrading via
“apt-get install libstdc++6=4.4.5-8”
or upgrading via
“apt-get install -t wheezy g++ libstdc++”.
Check “ls /usr/lib/libstdc*” exists and symlinks are correct, then recompile.