/* New variables must be added to the very end for binary compatibility.
* XSUB.h provides wrapper functions via perlapi.h that make this
* irrelevant, but not all code may be expected to #include XSUB.h. */
+
+#if defined(USE_ITHREADS)
+PERLVAR(Iclone_callbacks, AV*) /* used for collecting callbacks during perl_clone*/
+#endif
+