instead of unions use double cast for data pointer <-> function pointer

[p5sagit/p5-mst-13.2.git] / embed.pl

diff --git a/embed.pl b/embed.pl
index 9cdef07..27815ae 100755 (executable)
--- a/embed.pl
+++ b/embed.pl
@@ -24,6 +24,7 @@ sub do_not_edit ($)
     $years =~ s/1999,/1999,\n  / if length $years > 40;
 
     my $warning = <<EOW;
+ -*- buffer-read-only: t -*-
 
    $file
 
@@ -79,7 +80,7 @@ sub walk_table (&@) {
        $F = $filename;
     }
     else {
-       safer_unlink $filename;
+       safer_unlink $filename if $filename ne '/dev/null';
        open F, ">$filename" or die "Can't open $filename: $!";
        binmode F;
        $F = \*F;
@@ -120,7 +121,7 @@ sub munge_c_files () {
        if (@_ > 1) {
            $functions->{$_[2]} = \@_ if $_[@_-1] =~ /\.\.\./;
        }
-    } '/dev/null', '';
+    } '/dev/null', '', '';
     local $^I = '.bak';
     while (<>) {
 #      if (/^#\s*include\s+"perl.h"/) {
@@ -203,17 +204,17 @@ sub write_protos {
        $ret .= ")";
        my @attrs;
        if ( $flags =~ /r/ ) {
-           push @attrs, "__attribute__((noreturn))";
+           push @attrs, "__attribute__noreturn__";
        }
        if ( $flags =~ /a/ ) {
-           push @attrs, "__attribute__((malloc))";
+           push @attrs, "__attribute__malloc__";
            $flags .= "R"; # All allocing must check return value
        }
        if ( $flags =~ /R/ ) {
-           push @attrs, "__attribute__((warn_unused_result))";
+           push @attrs, "__attribute__warn_unused_result__";
        }
        if ( $flags =~ /P/ ) {
-           push @attrs, "__attribute__((pure))";
+           push @attrs, "__attribute__pure__";
        }
        if( $flags =~ /f/ ) {
            my $prefix = $has_context ? 'pTHX_' : '';
@@ -223,7 +224,7 @@ sub write_protos {
        }
        if ( @nonnull ) {
            my @pos = map { $has_context ? "pTHX_$_" : $_ } @nonnull;
-           push @attrs, sprintf( "__attribute__((nonnull(%s)))", join( ",", @pos ) );
+           push @attrs, map { sprintf( "__attribute__nonnull__(%s)", $_ ) } @pos;
        }
        if ( @attrs ) {
            $ret .= "\n";
@@ -250,8 +251,8 @@ sub write_global_sym {
     $ret;
 }
 
-walk_table(\&write_protos,     "proto.h", undef);
-walk_table(\&write_global_sym, "global.sym", undef);
+walk_table(\&write_protos,     "proto.h", undef, "/* ex: set ro: */\n");
+walk_table(\&write_global_sym, "global.sym", undef, "# ex: set ro:\n");
 
 # XXX others that may need adding
 #       warnhook
@@ -601,6 +602,7 @@ print EM <<'END';
 #  define Perl_sv_setpvf_mg_nocontext  Perl_sv_setpvf_mg
 #endif
 
+/* ex: set ro: */
 END
 
 close(EM) or die "Error closing EM: $!";
@@ -710,6 +712,8 @@ for $sym (sort @extvars) {
 print EM <<'END';
 
 #endif /* PERL_POLLUTE */
+
+/* ex: set ro: */
 END
 
 close(EM) or die "Error closing EM: $!";
@@ -790,10 +794,27 @@ EXTCONST void * const PL_force_link_funcs[] = {
 #define PERLVARIC(v,t,i) PERLVAR(v,t)
 #define PERLVARISC(v,i) PERLVAR(v,char)
 
+/* In Tru64 (__DEC && __osf__) the cc option -std1 causes that one
+ * cannot cast between void pointers and function pointers without
+ * info level warnings.  The PL_force_link_funcs[] would cause a few
+ * hundred of those warnings.  In code one can circumnavigate this by using
+ * unions that overlay the different pointers, but in declarations one
+ * cannot use this trick.  Therefore we just disable the warning here
+ * for the duration of the PL_force_link_funcs[] declaration. */
+
+#if defined(__DECC) && defined(__osf__)
+#pragma message save
+#pragma message disable (nonstandcast)
+#endif
+
 #include "thrdvar.h"
 #include "intrpvar.h"
 #include "perlvars.h"
 
+#if defined(__DECC) && defined(__osf__)
+#pragma message restore
+#endif
+
 #undef PERLVAR
 #undef PERLVARA
 #undef PERLVARI
@@ -829,6 +850,7 @@ print CAPIH <<'EOT';
 
 #endif /* __perlapi_h__ */
 
+/* ex: set ro: */
 EOT
 close CAPIH or die "Error closing CAPIH: $!";
 
@@ -905,6 +927,8 @@ unsigned char** Perl_Gfold_locale_ptr(pTHX) {
 END_EXTERN_C
 
 #endif /* MULTIPLICITY */
+
+/* ex: set ro: */
 EOT
 
 close(CAPI) or die "Error closing CAPI: $!";