New file to look for duplicate includes.

maint/dupincludes.pl

@@ -0,0 +1,40 @@
+#!/usr/bin/env perl
+
+# Copyright (c) 2005, Pavel Roskin
+# This script is Free Software, and it can be copied, distributed and
+# modified under the terms of GNU General Public License, version 2.
+
+# Locate duplicate includes
+
+use strict;
+
+my %sys_includes;
+my %loc_includes;
+
+if ($#ARGV != 0) {
+	print "Usage: dupincludes.pl file\n";
+	exit 1;
+}
+
+my $filename = $ARGV[0];
+
+if (!open (FILE, "$filename")) {
+	print "Cannot open file \"$filename\"\n";
+	exit 1;
+}
+
+foreach (<FILE>) {
+	if (/^\s*#\s*include\s*<(.*)>/) {
+		if (defined $sys_includes{$1}) {
+			print "$filename: duplicate <$1>\n";
+		} else {
+			$sys_includes{$1} = 1;
+		}
+	} elsif (/^\s*#\s*include\s*"(.*)"/) {
+		if (defined $loc_includes{$1}) {
+			print "$filename: duplicate \"$1\"\n";
+		} else {
+			$loc_includes{$1} = 1;
+		}
+	}
+}