The softwareinstaller shows that libstdc++devel and libstdc++ are installed but I don't find them in the folder /usr/bin
The error message is: ./setup: error while loading shared libraries: libstdc++.so.5: cannot open shared object file: No such file or directory
You could use this site for finding the rpms:
http://rpm.pbone.net, which would have yielded that you need to install compat-libstdc++-33, which can be done like this:
yum install compat-libstdc++-33
I think you will have more issues, perhaps you should check if you can find the requirements you need first. Hast du dieses Test script schon gefunden und benutzt:
http://www.b1gmail.de/requirements/servertest.htm (weiss nicht ob es alles checkt, es schaut sich an dass es nur die PHP und MySQL Funktionalitat uberprüft vom Screenshot)