Last weekend I could solve my problem. Here a summary what I done.
First I located the broken symlinks regarding gcc in /usr/bin/
$ find . -xtype l
as I downgrade the gcc to 4.4 I changed the symlinks to the 4.4 Version. This doesen't work and now my System doesen't boot. As I learned now the Nvidia driver need the gcc compiler to work. Now I would like to get back to the default gcc but it doesen't work. What did I done yet...