PERLVARI(Imaxo, int, MAXO) /* maximum number of ops */
PERLVAR(Iosname, char *) /* operating system */
-/* For binary compatibility with older versions only */
-PERLVARI(Ish_path_compat, const char *, SH_PATH)/* full path of shell */
-
PERLVAR(Isighandlerp, Sighandler_t)
PERLVAR(Ixnv_root, NV *) /* free xnv list */