Can you try with the newest version first: http://killtube.org/downloads/libcod/2014_03_22/
By the compile date it can't have the native CoDScript functions in 1.0:
Code:$ git log ... commit ab4da6d1dd7951a8ce66da6f2babb7e8a22f6bf8 Author: M-itch <mitchhubers@gmail.com> Date: Sat Mar 8 18:46:00 2014 +0100 Added real function support to 1.0 (untested) ...