#ifdef THREADS_HAVE_PIDS
PERLVARI(Gppid, IV, 0)
#endif
+
+#ifdef USE_ITHREADS
+PERLVAR(Gdollarzero_mutex, perl_mutex) /* Modifying $0 */
+#endif
+
+/* This is constant on most architectures, a global on OS/2 */
+PERLVARI(Gsh_path, char *, SH_PATH)/* full path of shell */