[ninja/mac] Add xcode_emulation support for -Wobjc-missing-property-synthesis.

pylib/gyp/xcode_emulation.py

 # Copyright (c) 2012 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """
 This module contains classes that help to emulate xcodebuild behavior on top of
 other build systems, such as make and ninja.
 """
 
 import copy
@@ skipping 451 matching lines @@
     gc_policy = self._Settings().get('GCC_ENABLE_OBJC_GC', 'unsupported')
     if gc_policy == 'supported':
       flags.append('-fobjc-gc')
     elif gc_policy == 'required':
       flags.append('-fobjc-gc-only')
 
   def _AddObjectiveCARCFlags(self, flags):
     if self._Test('CLANG_ENABLE_OBJC_ARC', 'YES', default='NO'):
       flags.append('-fobjc-arc')
 
+  def _AddObjectiveCMissingPropertySynthesisFlags(self, flags):
+    if self._Test('CLANG_WARN_OBJC_MISSING_PROPERTY_SYNTHESIS',
+                  'YES', default='NO'):
+      flags.append('-Wobjc-missing-property-synthesis')
+
   def GetCflagsObjC(self, configname):
     """Returns flags that need to be added to .m compilations."""
     self.configname = configname
     cflags_objc = []
     self._AddObjectiveCGarbageCollectionFlags(cflags_objc)
     self._AddObjectiveCARCFlags(cflags_objc)
+    self._AddObjectiveCMissingPropertySynthesisFlags(cflags_objc)
     self.configname = None
     return cflags_objc
 
   def GetCflagsObjCC(self, configname):
     """Returns flags that need to be added to .mm compilations."""
     self.configname = configname
     cflags_objcc = []
     self._AddObjectiveCGarbageCollectionFlags(cflags_objcc)
     self._AddObjectiveCARCFlags(cflags_objcc)
+    self._AddObjectiveCMissingPropertySynthesisFlags(cflags_objcc)
     if self._Test('GCC_OBJC_CALL_CXX_CDTORS', 'YES', default='NO'):
       cflags_objcc.append('-fobjc-call-cxx-cdtors')
     self.configname = None
     return cflags_objcc
 
   def GetInstallNameBase(self):
     """Return DYLIB_INSTALL_NAME_BASE for this target."""
     # Xcode sets this for shared_libraries, and for nonbundled loadable_modules.
     if (self.spec['type'] != 'shared_library' and
         (self.spec['type'] != 'loadable_module' or self._IsBundle())):
@@ skipping 793 matching lines @@
         new_config_dict['xcode_settings']['SDKROOT'] = 'iphoneos'
       target_dict['configurations'][new_config_name] = new_config_dict
   return targets
 
 def CloneConfigurationForDeviceAndEmulator(target_dicts):
   """If |target_dicts| contains any iOS targets, automatically create -iphoneos
   targets for iOS device builds."""
   if _HasIOSTarget(target_dicts):
     return _AddIOSDeviceConfigurations(target_dicts)
   return target_dicts