PERL_CALLCONV SV* Perl_newSVnv(pTHX_ NV n);
PERL_CALLCONV SV* Perl_newSVpv(pTHX_ const char* s, STRLEN len);
PERL_CALLCONV SV* Perl_newSVpvn(pTHX_ const char* s, STRLEN len);
PERL_CALLCONV SV* Perl_newSVnv(pTHX_ NV n);
PERL_CALLCONV SV* Perl_newSVpv(pTHX_ const char* s, STRLEN len);
PERL_CALLCONV SV* Perl_newSVpvn(pTHX_ const char* s, STRLEN len);