PERLVAR(Icurstname, SV *) /* name of current package */
PERLVAR(Ibeginav, AV *) /* names of BEGIN subroutines */
PERLVAR(Iendav, AV *) /* names of END subroutines */
+PERLVAR(Iunitcheckav, AV *) /* names of UNITCHECK subroutines */
PERLVAR(Icheckav, AV *) /* names of CHECK subroutines */
PERLVAR(Iinitav, AV *) /* names of INIT subroutines */
PERLVAR(Istrtab, HV *) /* shared string table */
PERLVAR(Isort_RealCmp, SVCOMPARE_t)
PERLVARI(Icheckav_save, AV*, NULL) /* save CHECK{}s when compiling */
+PERLVARI(Iunitcheckav_save, AV*, NULL) /* save UNITCHECK{}s when compiling */
PERLVARI(Iclocktick, long, 0) /* this many times() ticks in a second */