Disable sometimes-uninitialized Clang warning for iOS

libyuv_test.gyp

 # Copyright 2011 The LibYuv 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.
 
 {
   'variables': {
@@ skipping 58 matching lines @@
         }],
         [ 'OS == "ios" and target_subarch == 64', {
           'defines': [
             'LIBYUV_DISABLE_NEON'
           ],
         }],
         [ 'OS == "ios"', {
           'xcode_settings': {
             'DEBUGGING_SYMBOLS': 'YES',
             'DEBUG_INFORMATION_FORMAT' : 'dwarf-with-dsym',
+            # Work around compile issue with isosim.mm, see
+            # https://code.google.com/p/libyuv/issues/detail?id=548 for details.
+            'WARNING_CFLAGS': [
+              '-Wno-sometimes-uninitialized',
+            ],
           },
+          'cflags': [
+            '-Wno-sometimes-uninitialized',
+          ],
         }],
         [ 'OS != "ios" and libyuv_disable_jpeg != 1', {
           'defines': [
             'HAVE_JPEG',
           ],
         }],
         ['OS=="android"', {
           'dependencies': [
             '<(DEPTH)/testing/android/native_test.gyp:native_test_native_code',
           ],
@@ skipping 121 matching lines @@
       ],
     }],
   ],
 }
 
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