How to compile and run KDE4

...or rather how to setup a KDE4 development environment. There already is a howto on techbase, but I'm using my own scripts since years, and they work just fine. I've made them public in my user space on techbase: User:Dhaumann/Compiling KDE4. The howto is very short but complete. It does not have any troubleshooting sections. This is intentional: If you have any errors, fix them and rerun the scripts. Happy compiling :)