PERL_CALLCONV int Perl_mg_set(pTHX_ SV* sv);
PERL_CALLCONV I32 Perl_mg_size(pTHX_ SV* sv);
PERL_CALLCONV OP* Perl_mod(pTHX_ OP* o, I32 type);
+PERL_CALLCONV int Perl_mode_from_discipline(pTHX_ SV* discp);
PERL_CALLCONV char* Perl_moreswitches(pTHX_ char* s);
PERL_CALLCONV OP* Perl_my(pTHX_ OP* o);
PERL_CALLCONV NV Perl_my_atof(pTHX_ const char *s);