How to compile .c code from Cython with gcc?

That is a linker (ld) error and not a compiler error. You should provide the path to the library (-l and -L) and not only to the headers (-I).

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.