Added missing prototypes.

This was mostly for XS functions defined in the core, but also
for a handful of functions in the :stdio layer.

perlio.c

@@ -310,6 +310,7 @@ PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
     return NULL;
 }
 
+XS(XS_PerlIO__Layer__find); /* prototype to pass -Wmissing-prototypes */
 XS(XS_PerlIO__Layer__find)
 {
     dXSARGS;
@@ -818,6 +819,7 @@ MGVTBL perlio_vtab = {
     perlio_mg_free
 };
 
+XS(XS_io_MODIFY_SCALAR_ATTRIBUTES); /* prototype to pass -Wmissing-prototypes */
 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
 {
     dXSARGS;
@@ -858,6 +860,7 @@ PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
     return sv;
 }
 
+XS(XS_PerlIO__Layer__NoWarnings); /* prototype to pass -Wmissing-prototypes */
 XS(XS_PerlIO__Layer__NoWarnings)
 {
     /* This is used as a %SIG{__WARN__} handler to suppress warnings
@@ -871,6 +874,7 @@ XS(XS_PerlIO__Layer__NoWarnings)
     XSRETURN(0);
 }
 
+XS(XS_PerlIO__Layer__find); /* prototype to pass -Wmissing-prototypes */
 XS(XS_PerlIO__Layer__find)
 {
     dVAR;

perliol.h

@@ -239,9 +239,17 @@ PERL_EXPORT_C PerlIO *  PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS
 PERL_EXPORT_C IV        PerlIOStdio_eof(pTHX_ PerlIO *f);
 PERL_EXPORT_C IV        PerlIOStdio_error(pTHX_ PerlIO *f);
 PERL_EXPORT_C IV        PerlIOStdio_fileno(pTHX_ PerlIO *f);
+#ifdef USE_STDIO_PTR
+PERL_EXPORT_C STDCHAR * PerlIOStdio_get_ptr(pTHX_ PerlIO *f);
+PERL_EXPORT_C SSize_t   PerlIOStdio_get_cnt(pTHX_ PerlIO *f);
+PERL_EXPORT_C void      PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt);
+#endif
 PERL_EXPORT_C IV        PerlIOStdio_fill(pTHX_ PerlIO *f);
 PERL_EXPORT_C IV        PerlIOStdio_flush(pTHX_ PerlIO *f);
+#ifdef FILE_base
 PERL_EXPORT_C STDCHAR * PerlIOStdio_get_base(pTHX_ PerlIO *f);
+PERL_EXPORT_C Size_t    PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f);
+#endif
 PERL_EXPORT_C char *    PerlIOStdio_mode(const char *mode, char *tmode);
 PERL_EXPORT_C PerlIO *  PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers, IV n, const char *mode, int fd, int imode, int perm, PerlIO *f, int narg, SV **args);
 PERL_EXPORT_C IV        PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab);

universal.c

@@ -328,6 +328,7 @@ Perl_croak_xs_usage(const CV *const cv, const char *const params)
     }
 }
 
+XS(XS_UNIVERSAL_isa); /* prototype to pass -Wmissing-prototypes */
 XS(XS_UNIVERSAL_isa)
 {
     dVAR;
@@ -348,6 +349,7 @@ XS(XS_UNIVERSAL_isa)
     }
 }
 
+XS(XS_UNIVERSAL_can); /* prototype to pass -Wmissing-prototypes */
 XS(XS_UNIVERSAL_can)
 {
     dVAR;
@@ -399,6 +401,7 @@ XS(XS_UNIVERSAL_can)
     XSRETURN(1);
 }
 
+XS(XS_UNIVERSAL_DOES); /* prototype to pass -Wmissing-prototypes */
 XS(XS_UNIVERSAL_DOES)
 {
     dVAR;
@@ -416,6 +419,7 @@ XS(XS_UNIVERSAL_DOES)
     }
 }
 
+XS(XS_utf8_is_utf8); /* prototype to pass -Wmissing-prototypes */
 XS(XS_utf8_is_utf8)
 {
      dVAR;
@@ -433,6 +437,7 @@ XS(XS_utf8_is_utf8)
      XSRETURN_EMPTY;
 }
 
+XS(XS_utf8_valid); /* prototype to pass -Wmissing-prototypes */
 XS(XS_utf8_valid)
 {
      dVAR;
@@ -451,6 +456,7 @@ XS(XS_utf8_valid)
      XSRETURN_EMPTY;
 }
 
+XS(XS_utf8_encode); /* prototype to pass -Wmissing-prototypes */
 XS(XS_utf8_encode)
 {
     dVAR;
@@ -462,6 +468,7 @@ XS(XS_utf8_encode)
     XSRETURN_EMPTY;
 }
 
+XS(XS_utf8_decode); /* prototype to pass -Wmissing-prototypes */
 XS(XS_utf8_decode)
 {
     dVAR;
@@ -479,6 +486,7 @@ XS(XS_utf8_decode)
     XSRETURN(1);
 }
 
+XS(XS_utf8_upgrade); /* prototype to pass -Wmissing-prototypes */
 XS(XS_utf8_upgrade)
 {
     dVAR;
@@ -496,6 +504,7 @@ XS(XS_utf8_upgrade)
     XSRETURN(1);
 }
 
+XS(XS_utf8_downgrade); /* prototype to pass -Wmissing-prototypes */
 XS(XS_utf8_downgrade)
 {
     dVAR;
@@ -512,6 +521,7 @@ XS(XS_utf8_downgrade)
     XSRETURN(1);
 }
 
+XS(XS_utf8_native_to_unicode); /* prototype to pass -Wmissing-prototypes */
 XS(XS_utf8_native_to_unicode)
 {
  dVAR;
@@ -525,6 +535,7 @@ XS(XS_utf8_native_to_unicode)
  XSRETURN(1);
 }
 
+XS(XS_utf8_unicode_to_native); /* prototype to pass -Wmissing-prototypes */
 XS(XS_utf8_unicode_to_native)
 {
  dVAR;
@@ -538,6 +549,7 @@ XS(XS_utf8_unicode_to_native)
  XSRETURN(1);
 }
 
+XS(XS_Internals_SvREADONLY); /* prototype to pass -Wmissing-prototypes */
 XS(XS_Internals_SvREADONLY)	/* This is dangerous stuff. */
 {
     dVAR;
@@ -575,6 +587,7 @@ XS(XS_Internals_SvREADONLY)	/* This is dangerous stuff. */
     XSRETURN_UNDEF; /* Can't happen. */
 }
 
+XS(XS_constant__make_const); /* prototype to pass -Wmissing-prototypes */
 XS(XS_constant__make_const)	/* This is dangerous stuff. */
 {
     dVAR;
@@ -605,6 +618,7 @@ XS(XS_constant__make_const)	/* This is dangerous stuff. */
     XSRETURN(0);
 }
 
+XS(XS_Internals_SvREFCNT); /* prototype to pass -Wmissing-prototypes */
 XS(XS_Internals_SvREFCNT)	/* This is dangerous stuff. */
 {
     dVAR;
@@ -630,6 +644,7 @@ XS(XS_Internals_SvREFCNT)	/* This is dangerous stuff. */
 
 }
 
+XS(XS_Internals_hv_clear_placehold); /* prototype to pass -Wmissing-prototypes */
 XS(XS_Internals_hv_clear_placehold)
 {
     dVAR;
@@ -644,6 +659,7 @@ XS(XS_Internals_hv_clear_placehold)
     }
 }
 
+XS(XS_PerlIO_get_layers); /* prototype to pass -Wmissing-prototypes */
 XS(XS_PerlIO_get_layers)
 {
     dVAR;
@@ -770,6 +786,7 @@ XS(XS_PerlIO_get_layers)
 }
 
 
+XS(XS_re_is_regexp); /* prototype to pass -Wmissing-prototypes */
 XS(XS_re_is_regexp)
 {
     dVAR; 
@@ -786,6 +803,7 @@ XS(XS_re_is_regexp)
     }
 }
 
+XS(XS_re_regnames_count); /* prototype to pass -Wmissing-prototypes */
 XS(XS_re_regnames_count)
 {
     REGEXP *rx = PL_curpm ? PM_GETRE(PL_curpm) : NULL;
@@ -809,6 +827,7 @@ XS(XS_re_regnames_count)
     XSRETURN(1);
 }
 
+XS(XS_re_regname); /* prototype to pass -Wmissing-prototypes */
 XS(XS_re_regname)
 {
     dVAR;
@@ -841,6 +860,7 @@ XS(XS_re_regname)
 }
 
 
+XS(XS_re_regnames); /* prototype to pass -Wmissing-prototypes */
 XS(XS_re_regnames)
 {
     dVAR;
@@ -896,6 +916,7 @@ XS(XS_re_regnames)
     return;
 }
 
+XS(XS_re_regexp_pattern); /* prototype to pass -Wmissing-prototypes */
 XS(XS_re_regexp_pattern)
 {
     dVAR;