Yes I have read those; as mentioned the tutorial is for C++ but my library should be only in C.
The reason I wanted to create the library is that I have also read that void functions need to be put in a separate library, especially if they should take custom data types as inputs.
It's weekend now and I have other commitments but I will try to upload code so that at least I can get the functions working correctly.
Meanwhile, if somebody has managed to get the code from wikipedia to compile -- first of all, congrats! -- please share 8)
Thanks for your help!