Do not set sdk_root, it's already set by brightray.

common.gypi

@@ -4,7 +4,6 @@
     'conditions': [
       ['OS=="mac"', {
         'clang': 1,
-        'mac_sdk%': '<!(python tools/mac/find_sdk.py 10.8)',
       }],
       ['OS=="win" and (MSVS_VERSION=="2012e" or MSVS_VERSION=="2010e")', {
         'msvs_express': 1,
@@ -134,7 +133,6 @@
             '-fcolor-diagnostics',
           ],
 
-          'SDKROOT': 'macosx<(mac_sdk)',     # -isysroot
           'GCC_C_LANGUAGE_STANDARD': 'c99',  # -std=c99
         },
       },

tools/mac/find_sdk.py

@@ -1,82 +0,0 @@
-#!/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
-
-"""Prints the lowest locally available SDK version greater than or equal to a
-given minimum sdk version to standard output.
-
-Usage:
-  python find_sdk.py 10.6  # Ignores SDKs < 10.6
-"""
-
-from optparse import OptionParser
-
-
-def parse_version(version_str):
-  """'10.6' => [10, 6]"""
-  return map(int, re.findall(r'(\d+)', version_str))
-
-
-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")
-  (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
-    raise Exception(('Error %d running xcode-select, you might have to run '
-      '|sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer| '
-      'if you are using Xcode 4.') % job.returncode)
-  # The Developer folder moved in Xcode 4.3.
-  xcode43_sdk_path = os.path.join(
-      out.rstrip(), 'Platforms/MacOSX.platform/Developer/SDKs')
-  if os.path.isdir(xcode43_sdk_path):
-    sdk_dir = xcode43_sdk_path
-  else:
-    sdk_dir = os.path.join(out.rstrip(), 'SDKs')
-  sdks = [re.findall('^MacOSX(10\.\d+)\.sdk$', s) for s in os.listdir(sdk_dir)]
-  sdks = [s[0] for s in sdks if s]  # [['10.5'], ['10.6']] => ['10.5', '10.6']
-  sdks = [s for s in sdks  # ['10.5', '10.6'] => ['10.6']
-          if parse_version(s) >= parse_version(min_sdk_version)]
-  if not sdks:
-    raise Exception('No %s+ SDK found' % min_sdk_version)
-  best_sdk = sorted(sdks, key=parse_version)[0]
-
-  if options.verify and best_sdk != min_sdk_version and not options.sdk_path:
-    print >>sys.stderr, ''
-    print >>sys.stderr, '                                           vvvvvvv'
-    print >>sys.stderr, ''
-    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
-
-  return best_sdk
-
-
-if __name__ == '__main__':
-  if sys.platform != 'darwin':
-    raise Exception("This script only runs on Mac")
-  print main()