Use MACOSX_DEPLOYMENT_TARGET instead of SDKROOT.

tools/find_mac_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
-
-"""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
-"""
-
-def parse_version(version_str):
-  """'10.6' => [10, 6]"""
-  return map(int, re.findall(r'(\d+)', version_str))
-
-def find_sdk_dir():
-  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')
-    
-  return sdk_dir
-
-def main():
-  min_sdk_version = '10.6'
-  if len(sys.argv) > 1:
-    min_sdk_version = sys.argv[1]
-
-  sdk_dir = find_sdk_dir()
-
-  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 = min(sdks, key=parse_version)
-
-  return best_sdk
-
-if __name__ == '__main__':
-  if sys.platform != 'darwin':
-    raise Exception("This script only runs on Mac")
-  print main()