doc: dump_*.pl: support for gcc 4.5

- support for gcc 4.5 (gcc 4.5 will produce the translation unit
  dump file in the same directory as the output file, while older
  versions will always write it in the current directory).
- be more verbose on gcc error (display the complete gcc command line)
- cleanup temporary files even in the error case

doc/scripts/cdefs2doc/dump_cfg_defs.pl

@@ -228,9 +228,20 @@ if (! defined $opt_is_tu){
 	# => we have to create one
 	$src_fname=basename($file);
 	$tmp_file = "/tmp/" . mktemp ("dump_translation_unit_XXXXXX");
-	system("$gcc -fdump-translation-unit $c_defs -c $file -o $tmp_file.o && \
-			mv \"$src_fname\".001t.tu  $tmp_file") == 0 or
-		die "$gcc failed to generate a translation unit dump from $file";
+	# Note: gcc < 4.5 will produce the translation unit dump in a file in
+	# the current directory. gcc 4.5 will write it in the same directory as
+	# the output file.
+	system("$gcc -fdump-translation-unit $c_defs -c $file -o $tmp_file") == 0
+		or die "$gcc -fdump-translation-unit $c_defs -c $file -o $tmp_file" .
+			"  failed to generate a translation unit dump from $file";
+	if (system("if [ -f \"$src_fname\".001t.tu ]; then \
+					mv \"$src_fname\".001t.tu  $tmp_file; \
+				else mv /tmp/\"$src_fname\".001t.tu  $tmp_file; fi ") != 0) {
+		unlink($tmp_file, "$tmp_file.o");
+		die "could not find the gcc translation unit dump file" .
+				" ($src_fname.001t.tu) neither in the current directory" .
+				" or /tmp";
+	};
 	$tu=GCC::TranslationUnit::Parser->parsefile($tmp_file);
 	print(STDERR "src name $src_fname\n") if $dbg;
 	unlink($tmp_file, "$tmp_file.o");

doc/scripts/cdefs2doc/dump_rpcs.pl

@@ -221,9 +221,20 @@ if (! defined $opt_is_tu){
 	# => we have to create one
 	$src_fname=basename($file);
 	$tmp_file = "/tmp/" . mktemp ("dump_translation_unit_XXXXXX");
-	system("$gcc -fdump-translation-unit $c_defs -c $file -o $tmp_file && \
-			mv \"$src_fname\".001t.tu  $tmp_file") == 0 or
-		die "$gcc failed to generate a translation unit dump from $file";
+	# Note: gcc < 4.5 will produce the translation unit dump in a file in
+	# the current directory. gcc 4.5 will write it in the same directory as
+	# the output file.
+	system("$gcc -fdump-translation-unit $c_defs -c $file -o $tmp_file") == 0
+		or die "$gcc -fdump-translation-unit $c_defs -c $file -o $tmp_file" .
+			"  failed to generate a translation unit dump from $file";
+	if (system("if [ -f \"$src_fname\".001t.tu ]; then \
+					mv \"$src_fname\".001t.tu  $tmp_file; \
+				else mv /tmp/\"$src_fname\".001t.tu  $tmp_file; fi ") != 0) {
+		unlink($tmp_file, "$tmp_file.o");
+		die "could not find the gcc translation unit dump file" .
+				" ($src_fname.001t.tu) neither in the current directory" .
+				" or /tmp";
+	};
 	$tu=GCC::TranslationUnit::Parser->parsefile($tmp_file);
 	print(STDERR "src name $src_fname\n") if $dbg;
 	unlink($tmp_file, "$tmp_file.o");

doc/scripts/cdefs2doc/dump_selects.pl

@@ -391,9 +391,20 @@ sub process_file
 		# => we have to create one
 		$src_fname=basename($file);
 		$tmp_file = "/tmp/" . mktemp ("dump_translation_unit_XXXXXX");
-		system("$gcc -fdump-translation-unit $c_defs -c $file -o $tmp_file && \
-				mv \"$src_fname\".001t.tu  $tmp_file") == 0 or
-			die "$gcc failed to generate a translation unit dump from $file";
+		# Note: gcc < 4.5 will produce the translation unit dump in a file in
+		# the current directory. gcc 4.5 will write it in the same directory as
+		# the output file.
+		system("$gcc -fdump-translation-unit $c_defs -c $file -o $tmp_file") == 0
+			or die "$gcc -fdump-translation-unit $c_defs -c $file -o $tmp_file" .
+				"  failed to generate a translation unit dump from $file";
+		if (system("if [ -f \"$src_fname\".001t.tu ]; then \
+						mv \"$src_fname\".001t.tu  $tmp_file; \
+					else mv /tmp/\"$src_fname\".001t.tu  $tmp_file; fi ") != 0) {
+			unlink($tmp_file, "$tmp_file.o");
+			die "could not find the gcc translation unit dump file" .
+					" ($src_fname.001t.tu) neither in the current directory" .
+					" or /tmp";
+		};
 		$tu=GCC::TranslationUnit::Parser->parsefile($tmp_file);
 		print(STDERR "src name $src_fname\n") if $dbg;
 		unlink($tmp_file, "$tmp_file.o");