- Bootstrap: Rename already existing build directories to something more

  useful than *.old.<PID> - use the mtime of configure.in instead. 
  This gives us a time stamp of when this last build directory was created,
  e.g. "mysql-4.0.24-build-2005-01-31-16:47"


Build-tools/Bootstrap:
  - Rename already existing build directories to something more useful than
    *.old.<PID> - use the mtime of configure.in instead. This gives us a time
    stamp of when this last build directory was created, e.g.
    "mysql-4.0.24-build-2005-01-31-16:47"

Build-tools/Bootstrap

@@ -210,10 +210,16 @@ if (-d $target_dir)
 	}
 	else
 	{
-		&logger("Renaming $target_dir to $target_dir.old." . $$);
+		# Get the time stamp of "configure.in"
+		@stat= stat("$target_dir/configure.in");
+		my $mtime= $stat[9];
+		my ($sec,$min,$hour,$mday,$mon,$year) = localtime($mtime);
+		my $mtime= sprintf("%04d%-02d-%02d-%02d:%02d", $year+1900, $mon+1, $mday, $hour, $min);
+
+		&logger("Renaming $target_dir to $target_dir-$mtime");
 		$command= "mv ";
 		$command.= "-v " if ($opt_verbose || defined $opt_log);
-		$command.= "$target_dir $target_dir.old." . $$;
+		$command.= "$target_dir $target_dir-$mtime";
 		&run_command($command, "Could not rename $target_dir!");
 	}
 }