Fixed sync on OS X v10.6 (Snow Leopard).

build/mac/find_sdk.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import os
 import re
 import subprocess
 import sys
 
@@ skipping 59 matching lines @@
         'This build requires the %s SDK, but it was not found on your system.' \
         % min_sdk_version
     print >>sys.stderr, \
         'Either install it, or explicitly set mac_sdk in your GYP_DEFINES.'
     print >>sys.stderr, ''
     print >>sys.stderr, '                                           ^^^^^^^'
     print >>sys.stderr, ''
     return min_sdk_version
 
   if options.print_sdk_path:
-    print subprocess.check_output(['xcodebuild', '-version', '-sdk',
-                                   'macosx' + best_sdk, 'Path']).strip()
+    job = subprocess.Popen(['xcodebuild', '-version', '-sdk',
+                            'macosx' + best_sdk, 'Path'],
+                           stdout=subprocess.PIPE,
+                           stderr=subprocess.STDOUT)
+    out, err = job.communicate()
+    if job.returncode != 0:
+      print >>sys.stderr, out
+      print >>sys.stderr, err
+      raise Exception('No %s SDK found' % best_sdk)
+    print out.strip()
 
   return best_sdk
 
 
 if __name__ == '__main__':
   if sys.platform != 'darwin':
     raise Exception("This script only runs on Mac")
   print main()