diff -r 000000000000 -r 83f4b4db085c toolsandutils/productionbldtools/differ.pl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolsandutils/productionbldtools/differ.pl	Tue Feb 02 01:39:43 2010 +0200
@@ -0,0 +1,55 @@
+#!\usr\bin\perl
+# Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).
+# All rights reserved.
+# This component and the accompanying materials are made available
+# under the terms of "Eclipse Public License v1.0"
+# which accompanies this distribution, and is available
+# at the URL "http://www.eclipse.org/legal/epl-v10.html".
+#
+# Initial Contributors:
+# Nokia Corporation - initial contribution.
+#
+# Contributors:
+#
+# Description:
+# Treates the output of diff -q to list common parts of filenames of differing
+# files
+# 
+#
+
+while (my $line=<STDIN>)
+	{
+	chomp($line);
+	
+	if ($line =~ /^Files .* differ$/)
+		{
+		if ($line =~ /^Files ([^\s]+) and ([^\s]+) differ$/)
+			{
+			# Files present but differing
+			my @one = reverse(split(/[\/\\]/,$1));
+			my @two = reverse(split(/[\/\\]/,$2));
+			my @common; # Shared RHS of path/filename
+
+			my $index = 0;
+
+			while
+			  (  ($index < scalar(@one))
+			  && ($index < scalar(@two))
+			  )
+				{
+				# If path section is identical, copy to @common
+				if ($one[$index] eq $two[$index])
+					{ unshift @common, $one[$index]; }
+				else
+					{ last; }
+				$index++;
+				}
+
+			print join("\\",@common)."\n";
+			}
+		else
+			{
+			die "Could not parse \"$line\"\n";
+			}
+		}
+	}