PERL_CALLCONV U32 Perl_mg_length(pTHX_ SV* sv);
PERL_CALLCONV void Perl_mg_magical(pTHX_ SV* sv);
PERL_CALLCONV int Perl_mg_set(pTHX_ SV* sv);
-PERL_CALLCONV IV Perl_mg_size(pTHX_ SV* sv);
+PERL_CALLCONV I32 Perl_mg_size(pTHX_ SV* sv);
PERL_CALLCONV void Perl_mini_mktime(pTHX_ struct tm *pm);
PERL_CALLCONV OP* Perl_mod(pTHX_ OP* o, I32 type);
PERL_CALLCONV int Perl_mode_from_discipline(pTHX_ SV* discp);
#endif
#if defined(PERL_IN_MG_C) || defined(PERL_DECL_PROT)
-STATIC void S_save_magic(pTHX_ IV mgs_ix, SV *sv);
+STATIC void S_save_magic(pTHX_ I32 mgs_ix, SV *sv);
STATIC int S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth);
STATIC int S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 f, int n, SV *val);
#endif