+/* For copying GCs, this points to the start of the dynamic space
+ * currently in use (that will become the from_space when the next GC
+ * is done). For the GENCGC, it always points to DYNAMIC_SPACE_START. */
+lispobj *current_dynamic_space =
+#ifndef GENCGC
+ DYNAMIC_0_SPACE_START;
+#else
+ DYNAMIC_SPACE_START;
+#endif
+