mac: Build in C++11 mode.

build/common.gypi

 # 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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 3229 matching lines @@
               # when building with clang. This warning is triggered when the
               # override keyword is used via the OVERRIDE macro from
               # base/compiler_specific.h.
               'CLANG_WARN_CXX0X_EXTENSIONS': 'NO',
               # Warn if automatic synthesis is triggered with
               # the -Wobjc-missing-property-synthesis flag.
               'CLANG_WARN_OBJC_MISSING_PROPERTY_SYNTHESIS': 'YES',
               'GCC_VERSION': 'com.apple.compilers.llvm.clang.1_0',
               'WARNING_CFLAGS': [
                 '-Wheader-hygiene',
+                # This warns on using ints as initializers for floats in

[Mark Mentovai, 2012/12/04 03:52:08]

I find these comments easier to read and it makes the compiler arguments they’re
attached to more obvious if there’s some vertical whitespace. So, blank line
before this line, and also before 3255.

+                # initializer lists (e.g. |int a = f(); CGSize s = { a, a };|),
+                # which happens in several places in chrome code. Not sure if
+                # this is worth fixing.
+                '-Wno-c++11-narrowing',
+                # This warns about code like |"0x%08"NACL_PRIxPTR| -- with C++11
+                # user-defined literals, this is now a string literal with a UD
+                # suffix. However, this is used heavily in NaCl code, so disable
+                # the warning for now.
+                '-Wno-reserved-user-defined-literal',
+
                 # Don't die on dtoa code that uses a char as an array index.
                 # This is required solely for base/third_party/dmg_fp/dtoa.cc.
                 '-Wno-char-subscripts',
                 # Clang spots more unused functions.
                 '-Wno-unused-function',
-                # See comments on this flag higher up in this file.
-                '-Wno-unnamed-type-template-args',
-                # This (rightfully) complains about 'override', which we use
-                # heavily.
-                '-Wno-c++11-extensions',
 
                 # Warns on switches on enums that cover all enum values but
                 # also contain a default: branch. Chrome is full of that.
                 '-Wno-covered-switch-default',
               ],
+              'OTHER_CPLUSPLUSFLAGS': [
+                # gnu++11 instead of c++11 so that __ANSI_C__ doesn't get
+                # defined.  (Else e.g. finite() in base/float_util.h needs to
+                # be isfinite() which doesn't exist on the android bots.)
+                # typeof() is also disabled in c++11 (but we could use
+                # decltype() instead).

[Mark Mentovai, 2012/12/04 03:52:08]

Ultimately, I’d rather these couple of things and use -std=c++11.

+                # TODO(thakis): Use CLANG_CXX_LANGUAGE_STANDARD instead once all
+                # bots use xcode 4 -- http://crbug.com/147515).
+                '$(inherited)', '-std=gnu++11',
+              ],
             }],
             ['clang==1 and clang_use_chrome_plugins==1', {
               'OTHER_CFLAGS': [
                 '<@(clang_chrome_plugins_flags)',
               ],
             }],
             ['clang==1 and clang_load!=""', {
               'OTHER_CFLAGS': [
                 '-Xclang', '-load', '-Xclang', '<(clang_load)',
               ],
@@ skipping 613 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }