llector will trace memory reachable from file scope or <TT>static</tt>
variables defined as part of the main executable.  This is sufficient
if either the program is statically linked, or if pointers to the
garbage-collected heap are never stored in non-stack variables
defined in dynamic libraries.
<P>
If dynamic library data sections must also be traced, then
<UL>
<LI><TT>DYNAMIC_LOADING</tt> must be defined in the appropriate section
of <TT>gcconfig.h</tt>.
<LI>An appropriate versions of the functions
<TT