GTTF: Enable glibcxx debug mode for Debug builds by default.

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 1081 matching lines @@
 
     # The default type of gtest.
     'gtest_target_type%': 'executable',
 
     # Enable sampling based profiler.
     # See http://google-perftools.googlecode.com/svn/trunk/doc/cpuprofile.html
     'profiling%': '0',
     # Profile without optimizing out stack frames when profiling==1.
     'profiling_full_stack_frames%': '0',
 
-    # Enable strict glibc debug mode.
-    'glibcxx_debug%': 0,
     # And if we want to dump symbols for Breakpad-enabled builds.
     'linux_dump_symbols%': 0,
     # And if we want to strip the binary after dumping symbols.
     'linux_strip_binary%': 0,
     # Strip the test binaries needed for Linux reliability tests.
     'linux_strip_reliability_tests%': 0,
 
     # Enable TCMalloc.
     'linux_use_tcmalloc%': 1,
     'android_use_tcmalloc%': 0,
@@ skipping 1037 matching lines @@
       }],
       ['file_manager_extension==1', {
         'defines': ['FILE_MANAGER_EXTENSION=1'],
       }],
       ['image_loader_extension==1', {
         'defines': ['IMAGE_LOADER_EXTENSION=1'],
       }],
       ['profiling==1', {
         'defines': ['ENABLE_PROFILING=1'],
       }],
-      ['OS=="linux" and glibcxx_debug==1', {
-        'defines': ['_GLIBCXX_DEBUG=1',],
-        'cflags_cc+': ['-g'],
-      }],
       ['remoting==1', {
         'defines': ['ENABLE_REMOTING=1'],
       }],
       ['enable_webrtc==1', {
         'defines': ['ENABLE_WEBRTC=1'],
       }],
       ['proprietary_codecs==1', {
         'defines': ['USE_PROPRIETARY_CODECS'],
       }],
       ['enable_viewport==1', {
@@ skipping 558 matching lines @@
         'conditions': [
           ['OS=="linux" or OS=="android"', {
             'target_conditions': [
               ['_toolset=="target"', {
                 'cflags': [
                   '<@(debug_extra_cflags)',
                 ],
               }],
             ],
           }],
+          ['OS=="linux" and target_arch!="ia32"', {
+            # Enable libstdc++ debugging facilities to help catch problems
+            # early, see http://crbug.com/65151 .
+            # TODO(phajdan.jr): Should we enable this for all of POSIX?
+            'defines': ['_GLIBCXX_DEBUG=1',],
+          }],
           # Disabled on iOS because it was causing a crash on startup.
           # TODO(michelea): investigate, create a reduced test and possibly
           # submit a radar.
           ['release_valgrind_build==0 and OS!="ios"', {
             'xcode_settings': {
               'OTHER_CFLAGS': [
                 '-fstack-protector-all',  # Implies -fstack-protector
               ],
             },
           }],
@@ skipping 2051 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',
   },
 }