The
libstdc++.so.5/6 is installed on most systems, but not all.
To install a missing
libstdc++ library, visit
http://rpm.pbone.net/ and search for
libstdc++ for your relevant distribution. Download and
rpm --install it (as root).
Link the installed library from the VNL
lib directory, like so:
ln -s /usr/lib/libstdc++.so.6 libstdc++.so.6
Modify as needed for the location of the installed library, as found by (as
root, in /)