Target Mac bots at 10.7+libc++ to approximate Chrome's 10.6+libc++.

gyp/common_conditions.gypi

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # conditions used in both common.gypi and skia.gyp in chromium
 #
 {
   'defines': [
     'SK_ALLOW_STATIC_GLOBAL_INITIALIZERS=<(skia_static_initializers)',
@@ skipping 370 matching lines @@
       # specifically requested. These should be temporary staging defines. Any
       # permanent defines should be moved into the skia_android_framework block
       # above.
       'includes' : [
         'skia_for_android_framework_defines.gypi',
       ],
       'defines': [
         '<@(skia_for_android_framework_defines)',
       ],
     }],
-    
+
     [ 'skia_use_sdl == 1',
       {
         'defines': [ 'SK_USE_SDL' ],
     }],
 
     [ 'skia_os in ["linux", "freebsd", "openbsd", "solaris", "chromeos"]',
       {
         'defines': [
           'SK_SAMPLES_FOR_X',
           'SK_BUILD_FOR_UNIX',
@@ skipping 87 matching lines @@
             'defines': [ 'NDEBUG' ],
           },
         },
         'xcode_settings': {
           'conditions': [
             [ 'skia_fast', { 'WARNING_CFLAGS': [ '<@(skia_fast_flags)' ] } ],
             [ 'skia_warnings_as_errors', { 'GCC_TREAT_WARNINGS_AS_ERRORS': 'YES' }],
             [ 'skia_arch_type == "x86"', { 'ARCHS': ['i386']   }],
             [ 'skia_arch_type == "x86_64"', { 'ARCHS': ['x86_64'] }],
             [ 'skia_osx_deployment_target==""', {
-              'MACOSX_DEPLOYMENT_TARGET': '10.6', # -mmacos-version-min, passed in env to ld.
+              'MACOSX_DEPLOYMENT_TARGET': '10.7', # -mmacos-version-min, passed in env to ld.
             }, {
               'MACOSX_DEPLOYMENT_TARGET': '<(skia_osx_deployment_target)',
             }],
           ],
+          'CLANG_CXX_LIBRARY':                         'libc++',
           'CLANG_CXX_LANGUAGE_STANDARD':               'c++11',
           'GCC_ENABLE_CPP_EXCEPTIONS':                 'NO',   # -fno-exceptions
           'GCC_ENABLE_CPP_RTTI':                       'NO',   # -fno-rtti
           'GCC_THREADSAFE_STATICS':                    'NO',   # -fno-threadsafe-statics
           'GCC_ENABLE_SUPPLEMENTAL_SSE3_INSTRUCTIONS': 'YES',  # -mssse3
           'GCC_SYMBOLS_PRIVATE_EXTERN':                'NO',   # -fvisibility=hidden
           'GCC_INLINES_ARE_PRIVATE_EXTERN':            'NO',   # -fvisibility-inlines-hidden
           'GCC_CW_ASM_SYNTAX':                         'NO',   # remove -fasm-blocks
           'GCC_ENABLE_PASCAL_STRINGS':                 'NO',   # remove -mpascal-strings
           'WARNING_CFLAGS': [
@@ skipping 123 matching lines @@
           'LD_RUNPATH_SEARCH_PATHS': ['@executable_path/.'],
       },
     }],
 
   ], # end 'conditions'
   # The Xcode SYMROOT must be at the root. See build/common.gypi in chromium for more details
   'xcode_settings': {
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }