[Fahrvergnuugen]

Well, to make it more advanced, you could explain how configure and make cache things. In otherwords, if you run ./configure and then make...and then run ./configure and make again, the second time through it will go extremely fast because it's not actually recompiling. You have to do a make clean or make dist to delete the results of configure and make.

I ran into this a while back while trying to compile php 4.1. I kept getting the same exact error no matter what I did. Turns out it was because it wasnt configuring from scratch, so my changes were ignored.