Is it just this function that the linker can't resolve?
AFAIK, all of the cybergfx functions are handled via library call / tag call pragmas under storm so you shouldn't need to link with a stub library or object. I use the cgx devkit and not encountered any such problems. I use the following #include's...
#include
#include
#include
...all of which should be inside your default include directory. I guess if the compiler doesn't find the pragmas it assumes that the function definitions are in a link library.
Hope this helps.