So as I'm trying to make a nim module from a c library, I've tried c2nim (with no much luck) and it didn't append neihter cdecl nor importc nor header effects, I'm somewhat confused. I assume that cdecl it's for the same naming convention as C (to make it compatible I guess?), importc for writing that in the generated C code, and header for adding that in the generated C code, but why c2nim does not add any of this?