PERL_CALLCONV int Perl_my_socketpair(pTHX_ int family, int type, int protocol, int fd[2]);
#endif
+
+#if defined(USE_PERLIO) && !defined(USE_SFIO)
+PERL_CALLCONV int Perl_PerlIO_close(pTHX_ PerlIO *);
+PERL_CALLCONV int Perl_PerlIO_fill(pTHX_ PerlIO *);
+PERL_CALLCONV int Perl_PerlIO_fileno(pTHX_ PerlIO *);
+PERL_CALLCONV int Perl_PerlIO_eof(pTHX_ PerlIO *);
+PERL_CALLCONV int Perl_PerlIO_error(pTHX_ PerlIO *);
+PERL_CALLCONV int Perl_PerlIO_flush(pTHX_ PerlIO *);
+PERL_CALLCONV void Perl_PerlIO_clearerr(pTHX_ PerlIO *);
+PERL_CALLCONV void Perl_PerlIO_set_cnt(pTHX_ PerlIO *, int);
+PERL_CALLCONV void Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *, STDCHAR *, int);
+PERL_CALLCONV void Perl_PerlIO_setlinebuf(pTHX_ PerlIO *);
+PERL_CALLCONV SSize_t Perl_PerlIO_read(pTHX_ PerlIO *, void *, Size_t);
+PERL_CALLCONV SSize_t Perl_PerlIO_write(pTHX_ PerlIO *, const void *, Size_t);
+PERL_CALLCONV SSize_t Perl_PerlIO_unread(pTHX_ PerlIO *, const void *, Size_t);
+PERL_CALLCONV Off_t Perl_PerlIO_tell(pTHX_ PerlIO *);
+PERL_CALLCONV int Perl_PerlIO_seek(pTHX_ PerlIO *, Off_t, int);
+
+PERL_CALLCONV STDCHAR * Perl_PerlIO_get_base(pTHX_ PerlIO *);
+PERL_CALLCONV STDCHAR * Perl_PerlIO_get_ptr(pTHX_ PerlIO *);
+PERL_CALLCONV int Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *);
+PERL_CALLCONV int Perl_PerlIO_get_cnt(pTHX_ PerlIO *);
+
+PERL_CALLCONV PerlIO * Perl_PerlIO_stdin(pTHX);
+PERL_CALLCONV PerlIO * Perl_PerlIO_stdout(pTHX);
+PERL_CALLCONV PerlIO * Perl_PerlIO_stderr(pTHX);
+#endif /* PERLIO_LAYERS */
+
END_EXTERN_C