--- tinderbox.pl.original	Mon Sep 22 11:22:53 2003
+++ tinderbox.pl	Mon Sep 22 11:41:43 2003
@@ -77,6 +77,11 @@
 
 if ($Tinderconfig::cvs) {
   Log($log,"about to cvs checkout $Tinderconfig::cvsmodule:\n");
+  system("cvs -z3 diff $Tinderconfig::cvsmodule > /dev/null");
+  if ($? == 0) {
+    Log($log,"No diff detected against current cvs.\n\n");
+    return(undef);
+  }
   Log($log,`cvs -z3 co $Tinderconfig::cvsmodule 2>&1`); # do the checkout
   Log($log,"cvs checkout complete\n\n");
 }
@@ -193,4 +198,4 @@
         exit();
 }
 exec("$0");
-exit();
\ No newline at end of file
+exit();