Enable C++11. Synch toolchains with Chrome.

build/standalone.gypi

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 15 matching lines @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 # Definitions to be used when building stand-alone V8 binaries.
 
 {
   # We need to include toolchain.gypi here for third-party sources that don't
   # directly include it themselves.
   'includes': ['toolchain.gypi'],
   'variables': {
     'component%': 'static_library',
-    'clang%': 0,
     'asan%': 0,
     'tsan%': 0,
     'visibility%': 'hidden',
     'v8_enable_backtrace%': 0,
     'v8_enable_i18n_support%': 1,
     'v8_deprecation_warnings': 1,
     'msvs_multi_core_compile%': '1',
     'mac_deployment_target%': '10.5',
     'variables': {
       'variables': {
@@ skipping 63 matching lines @@
         'os_posix%': 0,
       }, {
         'os_posix%': 1,
       }],
       ['(v8_target_arch=="ia32" or v8_target_arch=="x64" or v8_target_arch=="x87") and \
         (OS=="linux" or OS=="mac")', {
         'v8_enable_gdbjit%': 1,
       }, {
         'v8_enable_gdbjit%': 0,
       }],
+      ['OS=="mac"', {
+        'clang%': 1,
+      }, {
+        'clang%': 0,
+      }],
     ],
     # Default ARM variable settings.
     'arm_version%': 'default',
     'arm_fpu%': 'vfpv3',
     'arm_float_abi%': 'default',
     'arm_thumb': 'default',
   },
   'target_defaults': {
     'variables': {
       'v8_code%': '<(v8_code)',
@@ skipping 77 matching lines @@
           'THREAD_SANITIZER',
         ],
       },
     }],
     ['OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris" \
        or OS=="netbsd"', {
       'target_defaults': {
         'cflags': [ '-Wall', '<(werror)', '-W', '-Wno-unused-parameter',
                     '-Wno-long-long', '-pthread', '-fno-exceptions',
                     '-pedantic' ],
-        'cflags_cc': [ '-Wnon-virtual-dtor', '-fno-rtti' ],
+        'cflags_cc': [ '-Wnon-virtual-dtor', '-fno-rtti', '-std=gnu++0x' ],
         'ldflags': [ '-pthread', ],
         'conditions': [
-          [ 'OS=="linux"', {
-            'cflags': [ '-ansi' ],
-          }],
           [ 'visibility=="hidden" and v8_enable_backtrace==0', {
             'cflags': [ '-fvisibility=hidden' ],
           }],
           [ 'component=="shared_library"', {
             'cflags': [ '-fPIC', ],
           }],
         ],
       },
     }],
     # 'OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris"
     #  or OS=="netbsd"'
     ['OS=="qnx"', {
       'target_defaults': {
         'cflags': [ '-Wall', '<(werror)', '-W', '-Wno-unused-parameter',
                     '-fno-exceptions' ],
-        'cflags_cc': [ '-Wnon-virtual-dtor', '-fno-rtti' ],
+        'cflags_cc': [ '-Wnon-virtual-dtor', '-fno-rtti', '-std=gnu++0x' ],
         'conditions': [
           [ 'visibility=="hidden"', {
             'cflags': [ '-fvisibility=hidden' ],
           }],
           [ 'component=="shared_library"', {
             'cflags': [ '-fPIC' ],
           }],
         ],
         'target_conditions': [
           [ '_toolset=="host" and host_os=="linux"', {
@@ skipping 77 matching lines @@
         },
       },
     }],  # OS=="win"
     ['OS=="mac"', {
       'xcode_settings': {
         'SYMROOT': '<(DEPTH)/xcodebuild',
       },
       'target_defaults': {
         'xcode_settings': {
           'ALWAYS_SEARCH_USER_PATHS': 'NO',
-          'GCC_C_LANGUAGE_STANDARD': 'ansi',        # -ansi
+          'GCC_C_LANGUAGE_STANDARD': 'c99',         # -std=c99
           'GCC_CW_ASM_SYNTAX': 'NO',                # No -fasm-blocks
           'GCC_DYNAMIC_NO_PIC': 'NO',               # No -mdynamic-no-pic
                                                     # (Equivalent to -fPIC)
           'GCC_ENABLE_CPP_EXCEPTIONS': 'NO',        # -fno-exceptions
           'GCC_ENABLE_CPP_RTTI': 'NO',              # -fno-rtti
           'GCC_ENABLE_PASCAL_STRINGS': 'NO',        # No -mpascal-strings
           # GCC_INLINES_ARE_PRIVATE_EXTERN maps to -fvisibility-inlines-hidden
           'GCC_INLINES_ARE_PRIVATE_EXTERN': 'YES',
           'GCC_SYMBOLS_PRIVATE_EXTERN': 'YES',      # -fvisibility=hidden
           'GCC_THREADSAFE_STATICS': 'NO',           # -fno-threadsafe-statics
@@ skipping 15 matching lines @@
         },
         'conditions': [
           ['werror==""', {
             'xcode_settings': {'GCC_TREAT_WARNINGS_AS_ERRORS': 'NO'},
           }, {
             'xcode_settings': {'GCC_TREAT_WARNINGS_AS_ERRORS': 'YES'},
           }],
           ['clang==1', {
             'xcode_settings': {
               'GCC_VERSION': 'com.apple.compilers.llvm.clang.1_0',
-              'CLANG_CXX_LANGUAGE_STANDARD': 'gnu++11',  # -std=gnu++11
+              'CLANG_CXX_LANGUAGE_STANDARD': 'gnu++0x',  # -std=gnu++0x
             },
           }],
         ],
         'target_conditions': [
           ['_type!="static_library"', {
             'xcode_settings': {'OTHER_LDFLAGS': ['-Wl,-search_paths_first']},
           }],
         ],  # target_conditions
       },  # target_defaults
     }],  # OS=="mac"
   ],
 }