#define PL_sharehook (*Perl_Gsharehook_ptr(NULL))
#undef PL_thr_key
#define PL_thr_key (*Perl_Gthr_key_ptr(NULL))
+#undef PL_threadhook
+#define PL_threadhook (*Perl_Gthreadhook_ptr(NULL))
#undef PL_unlockhook
#define PL_unlockhook (*Perl_Gunlockhook_ptr(NULL))