Make skia_sanitizer work on Macs too.

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 416 matching lines @@
         },
         'conditions' : [
           [ 'skia_shared_lib', {
             'defines': [
               'SKIA_DLL',
               'SKIA_IMPLEMENTATION=1',
             ],
           }],
           # Enable asan, tsan, etc.
           [ 'skia_sanitizer', {
+            'cflags_cc!': [ '-fno-rtti' ],                        # vptr needs rtti
             'cflags': [
               '-fsanitize=<(skia_sanitizer)',                     # Turn on sanitizers.
               '-fno-sanitize-recover=<(skia_sanitizer)',          # Make any failure fatal.
               '-fsanitize-blacklist=<(skia_sanitizer_blacklist)', # Compile in our blacklist.
               '-include <(skia_sanitizer_blacklist)',             # Make every .cpp depend on it.
             ],
-            'cflags_cc!': [
-              '-fno-rtti'
-            ],
-            'ldflags': [
-              '-fsanitize=<(skia_sanitizer)',
-            ],
+            'ldflags': [ '-fsanitize=<(skia_sanitizer)' ],
             'conditions' : [
               [ 'skia_sanitizer == "thread"', {
                 'defines': [ 'THREAD_SANITIZER' ],
               }],
             ],
           }],
           [ 'skia_clang_build', {
             'cflags_cc': [
                 '-Wno-unknown-warning-option',  # Allows unknown warnings.
                 '-Wno-deprecated',              # From Qt, via debugger (older Clang).
@@ skipping 41 matching lines @@
           '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': '10.7', # -mmacos-version-min, passed in env to ld.
             }, {
               'MACOSX_DEPLOYMENT_TARGET': '<(skia_osx_deployment_target)',
             }],
+            [ 'skia_sanitizer', {
+              'GCC_ENABLE_CPP_RTTI': 'YES',                         # vptr needs rtti
+              'OTHER_CFLAGS': [
+                '-fsanitize=<(skia_sanitizer)',                     # Turn on sanitizers.
+                '-fno-sanitize-recover=<(skia_sanitizer)',          # Make any failure fatal.
+                '-fsanitize-blacklist=<(skia_sanitizer_blacklist)', # Compile in our blacklist.
+                '-include <(skia_sanitizer_blacklist)',             # Make every .cpp depend on it.
+              ],
+              # We want to pass -fsanitize=... to our final link call,
+              # but not to libtool. OTHER_LDFLAGS is passed to both.

[Nico, 2016/05/13 17:06:02]

...or you could check if _type is not static_library like e.g. here:
https://code.google.com/p/chromium/codesearch#chromium/src/build/common.gypi&...

That seems like a less hacky approach :-)

+              # To trick GYP into doing what we want, we'll piggyback on
+              # LIBRARY_SEARCH_PATHS, producing "-L/usr/lib -fsanitize=...".
+              # The -L/usr/lib is redundant but innocuous: it's a default path.
+              'LIBRARY_SEARCH_PATHS': [ '/usr/lib -fsanitize=<(skia_sanitizer)'],
+            }],
           ],
           '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
@@ skipping 129 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',
   },
 }