Compile rtc_api_objc on Mac.

webrtc/api/api_tests.gyp

 # Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 {
   'includes': [ '../build/common.gypi', ],
@@ skipping 119 matching lines @@
             'java_in_dir': 'androidtests',
             'resource_dir': 'androidtests/res',
             'native_lib_target': 'libjingle_peerconnection_so',
             'is_test_apk': 1,
             'never_lint': 1,
           },
           'includes': [ '../../build/java_apk.gypi' ],
         },
       ],  # targets
     }],  # OS=="android"
-    ['OS=="ios"', {
+    ['OS=="ios" or (OS=="mac" and mac_deployment_target=="10.7")', {
       'targets': [
         {
           'target_name': 'rtc_api_objc_tests',
           'type': 'executable',
+          'includes': [
+            '../build/objc_common.gypi',
+          ],
           'dependencies': [
             '<(webrtc_root)/api/api.gyp:rtc_api_objc',
             '<(webrtc_root)/base/base_tests.gyp:rtc_base_tests_utils',
           ],
           'sources': [
             'objctests/RTCConfigurationTest.mm',
             'objctests/RTCDataChannelConfigurationTest.mm',
             'objctests/RTCIceCandidateTest.mm',
             'objctests/RTCIceServerTest.mm',
             'objctests/RTCMediaConstraintsTest.mm',
             'objctests/RTCSessionDescriptionTest.mm',
           ],
           'xcode_settings': {
-            'CLANG_ENABLE_OBJC_ARC': 'YES',
-            'CLANG_WARN_OBJC_MISSING_PROPERTY_SYNTHESIS': 'YES',
-            'GCC_PREFIX_HEADER': 'objc/WebRTC-Prefix.pch',
             # |-ObjC| flag needed to make sure category method implementations
             # are included:
             # https://developer.apple.com/library/mac/qa/qa1490/_index.html
             'OTHER_LDFLAGS': ['-ObjC'],
           },
         },
       ],
     }],  # OS=="ios"
     ['OS=="android"', {
       'targets': [
@@ skipping 18 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'peerconnection_unittests.isolate',
           ],
         },
       ],  # targets
     }],  # test_isolation_mode != "noop"
   ],  # conditions
 }