Enable -Wunused-local-typedef

sdch/sdch.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 53 matching lines @@
         [ 'OS == "win"', { 'include_dirs': [ 'win' ] } ],
       ],
       # open-vcdiff's logging.h introduces static initializers. This was
       # reported upstream years ago (
       # https://code.google.com/p/open-vcdiff/issues/detail?id=33 ). Since
       # upstream won't fix this, work around it on the chromium side:
       # Inject a header that forwards to base/logging.h instead (which doesn't
       # introduce static initializers, and which prevents open-vcdiff's
       # logging.h from being used).
       'variables': {
+        'clang_warning_flags': [
+          # sdch uses the pre-c++11 typedef-as-static_assert hack.
+          # https://code.google.com/p/open-vcdiff/issues/detail?id=44
+          '-Wno-unused-local-typedef',
+        ],
         'logging_path': 'logging_forward.h',
         'conditions': [
           # gyp leaves unspecified what the cwd is when running the compiler,
           # and gyp/linux doesn't have a built-in way for forcing an include.
           # So hardcode the base directory. If this spreads, provide native
           # support in gyp, like we have for gyp/mac and gyp/windows.
           # path.
           ['"<(GENERATOR)"=="ninja"', { 'logging_dir': '../..' },
                                       { 'logging_dir': '.' }
           ],
@@ skipping 11 matching lines @@
         }
       },
       'cflags': [
         '-include', '<(logging_dir)/sdch/<(logging_path)',
         # TODO(mostynb): remove this if open-vcdiff is ever updated for c++11:
         '-Wno-deprecated-declarations',
       ],
     },
   ],
 }