+#if defined(PERL_CORE) || defined(PERL_EXT)
+# define MgBYTEPOS(mg,sv,pv,len) S_MgBYTEPOS(aTHX_ mg,sv,pv,len)
+/* assumes get-magic and stringification have already occurred */
+# define MgBYTEPOS_set(mg,sv,pv,off) ( \
+ assert_((mg)->mg_type == PERL_MAGIC_regex_global) \
+ SvPOK(sv) && !SvGMAGICAL(sv) \
+ ? (mg)->mg_len = (off), (mg)->mg_flags |= MGf_BYTES \
+ : ((mg)->mg_len = DO_UTF8(sv) \
+ ? (SSize_t)utf8_length((U8 *)(pv), (U8 *)(pv)+(off)) \
+ : (SSize_t)(off), \
+ (mg)->mg_flags &= ~MGf_BYTES))
+#endif
+
+#define whichsig(pv) whichsig_pv(pv)
+