getting "libstdc++.so.5" to work
to install "libstdc++.so.5" I used Synaptic Package Manager and searched for "libstdc++" by just the name and not the description. The results were files like libstdc++6 and libstdc++5 without the .so.5 or .so.6 at the end. It showed that I already had libstdc++6 installed, so I checked to install libstdc++5, saw that it didn't negatively affect my computer by un-installing anything else, and approved it. After the installation my program instantly found libstdc++.so.5 and worked just fine -- Hope this helps.