Well, we all know in the deep of our heart that KDE mission is World domination.
We are on the first step to it, as for now once you have installed KDE from source you can not uninstall it anymore.
~/build-cmake/kdelibs4_snapshot$ make uninstall
make: *** No rule to make target `uninstall'. Stop.
PS: That is a joke, not in the way that it is not real, but in the way that i know that it is beign worked out, but i'm so frustated with cmake at the moment that i had to make a joke about it or die.