Get the proper Mac SDK path for the GN build.

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 13 matching lines @@
 
 
 def main():
   parser = OptionParser()
   parser.add_option("--verify",
                     action="store_true", dest="verify", default=False,
                     help="return the sdk argument and warn if it doesn't exist")
   parser.add_option("--sdk_path",
                     action="store", type="string", dest="sdk_path", default="",
                     help="user-specified SDK path; bypasses verification")
+  parser.add_option("--print_sdk_path",
+                    action="store_true", dest="print_sdk_path", default=False,
+                    help="Additionaly print the path the SDK (appears first).")
   (options, args) = parser.parse_args()
   min_sdk_version = args[0]
 
   job = subprocess.Popen(['xcode-select', '-print-path'],
                          stdout=subprocess.PIPE,
                          stderr=subprocess.STDOUT)
   out, err = job.communicate()
   if job.returncode != 0:
     print >>sys.stderr, out
     print >>sys.stderr, err
@@ skipping 22 matching lines @@
     print >>sys.stderr, \
         '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',

[Nico, 2014/01/16 22:52:58]

check_output is 2.7+…I guess that's fine these days.

+                                   'macosx' + best_sdk, 'Path']).strip()
+
   return best_sdk
 
 
 if __name__ == '__main__':
   if sys.platform != 'darwin':
     raise Exception("This script only runs on Mac")
   print main()