Can someone point me to a guide which describes how to compile nginx dynamic modules?

Tried to give it a go myself and ended up with an error saying it didn't recognize some upstream symbol, and my head hurts from staying up so late, and I'm rambling, and any help would be most appreciated, bitte und danke.

P.S. I'm not looking for advice concerning how to compile in general. I know how to compile things. I'm looking for specific steps with regard to compiling things for nginx.