-you should consider enabling and using thread local allocation (<I>e.g.</i>
-<TT>GC_LOCAL_MALLOC</tt>, see <TT>gc_local_alloc.h</tt>. If your platform
+you should consider enabling and using thread local allocation.
+For GC versions before 7.0, use <I>e.g.</i>
+<TT>GC_LOCAL_MALLOC</tt> and see <TT>gc_local_alloc.h</tt>;
+for later versions enabling thread-local allocations when the collector
+library is built changes the
+implementation of <TT>GC_MALLOC</tt>, so the client doesn't need to
+change.
+<P>
+If your platform