Build PDFium with -std=c++11 instead of g++11.

build/standalone.gypi

 # Copyright 2014 PDFium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Definitions to be used when building stand-alone PDFium binaries.
 
 {
   'variables': {
     'component%': 'static_library',
     'clang%': 0,
@@ skipping 164 matching lines @@
       '-Wno-missing-field-initializers',
       # Code might someday be made clean for -Wsign-compare, but for now
       # this produces too much noise to be useful.
       '-Wno-sign-compare',
       '-Wno-unused-parameter',
       '-pthread',
       '-fno-exceptions',
       '-fvisibility=hidden',
     ],
     'cflags_cc': [
-      '-std=gnu++0x',
+      '-std=c++11',
       '-Wnon-virtual-dtor',
       '-fno-rtti',
     ],
     'ldflags': [
       '-pthread',
     ],
     'defines': [
       # Don't use deprecated V8 APIs anywhere.
       'V8_DEPRECATION_WARNINGS',
     ],
@@ skipping 130 matching lines @@
         'LinkIncremental': '1',
         # SubSystem values:
         #   0 == not set
         #   1 == /SUBSYSTEM:CONSOLE
         #   2 == /SUBSYSTEM:WINDOWS
         'SubSystem': '1',
       },
     },
     'xcode_settings': {
       'ALWAYS_SEARCH_USER_PATHS': 'NO',
-      'CLANG_CXX_LANGUAGE_STANDARD': 'gnu++11',
+      'CLANG_CXX_LANGUAGE_STANDARD': 'c++11',
       '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_TREAT_WARNINGS_AS_ERRORS': 'NO',     # -Werror
@@ skipping 106 matching lines @@
       ],
     }],  # OS=="linux" or OS=="mac"
     ["use_goma==1", {
       'make_global_settings': [
         ['CC_wrapper', '<(gomadir)/gomacc'],
         ['CXX_wrapper', '<(gomadir)/gomacc'],
       ],
     }],  # use_goma==1
   ],
 }