From Wiring to pure C
And back to my main question, how to generally use libraries of this kind with pure C avr programming?


just as how you would write under arduino ide -> arduino ide is nothing but pure c/c++ plus a set of canned libraries. so what you are trying to do is no different from what you are doing with arduino right now, maybe with your own libraries or libraries from folks other than the arduino folks.

nothing magic about going in "pure c".