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_newSVpvn_share(pTHX_ const char* s, STRLEN len, U32 hash);
PERL_CALLCONV SV* Perl_newSVpvf(pTHX_ const char* pat, ...)
#ifdef CHECK_FORMAT
__attribute__((format(printf,pTHX_1,pTHX_2)))