C Extensions: calling across extensions

[Maxwell Sayles]

I have two C Extension modules written for python.  Within one module I
want to create an instance of an object within another module.  Say the
modules are named A and B.  Within A I have a creation method that looks
something like:

PyObject* A_new (int param)
{
  AType* self = PyObject_New (AType, &AType_definition);
  self->param = param;
  return (PyObject*)self;
}

within B i try to create an instance of AType like:

PyObject* A_new (int param);
PyObject* somefunction (PyObject* self, PyObject* args)
{
  PyObject* p = A_new (5);
  return p;
}

both of these functions are in seperate modules in seperate .so files
(linux).  I can import module A and everything works perfectly.  when i
import module B i get the error:
Import Error: ./B.so: undefined symbol: A_new

i compile both with
gcc -shared -o A.so A.c
gcc -shared -o B.so B.c

do i need to do special declarations for importing and exporting
functions across shared objects for python extension modules?  do i need
to compile with a -l option?  any help would be appreciated.

thanks, Maxwell Sayles