+#ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
+/* File descriptor to talk to the child which dumps scalars. */
+PERLVARI(Idumper_fd, int, -1)
+#endif
+
+/* Stores the PPID */
+#ifdef THREADS_HAVE_PIDS
+PERLVARI(Ippid, IV, 0)
+#endif
+
+#ifdef PERL_MAD
+PERLVARI(Imadskills, bool, FALSE) /* preserve all syntactic info */
+ /* (MAD = Misc Attribute Decoration) */
+PERLVARI(Ixmlfp, PerlIO *,NULL)
+#endif
+
+#ifdef PL_OP_SLAB_ALLOC
+PERLVAR(IOpPtr,I32 **)
+PERLVARI(IOpSpace,I32,0)
+PERLVAR(IOpSlab,I32 *)
+#endif
+