Merge revision 21306 to trunk. This fixes an issue with xcode output parsing on 10.6

dart/tools/build.py

 #!/usr/bin/env python
 #
 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 #
 
 import optparse
 import os
 import shutil
@@ skipping 255 matching lines @@
     term = os.getenv('TERM', 'dumb')
     # The capability "clr_eol" means clear the line from cursor to end
     # of line.  See man pages for tput and terminfo.
     try:
       clr_eol = subprocess.check_output(['tput', '-T' + term, 'el'],
                                         stderr=subprocess.STDOUT)
       if clr_eol:
         is_fancy_tty = True
     except subprocess.CalledProcessError:
       is_fancy_tty = False
+    except AttributeError:
+      is_fancy_tty = False
   for line in unbuffered(process.stdout.readline):
     line = line.rstrip()
     if line.startswith('=== BUILD ') or line.startswith('** BUILD '):
       if not is_empty_chunk(chunk):
         print '\n'.join(chunk)
       section = line
       if is_fancy_tty:
         # If stdout is a terminal, emit "progress" information.  The
         # progress information is the first line of the current chunk.
         # After printing the line, move the cursor back to the
@@ skipping 120 matching lines @@
         process.wait()
         if process.returncode != 0:
           print "BUILD FAILED"
           return 1
 
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(Main())