Enable debugging symbols to always use DWARF-4 format.

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 3025 matching lines @@
         'configurations': {
           'Debug_Base': {
             'variables': {
               'debug_optimize%': '0',
             },
             'defines': [
               '_DEBUG',
             ],
             'cflags': [
               '-O>(debug_optimize)',
-              '-g',
+              '-g3', '-gdwarf-4',

[Mark Mentovai, 2014/03/13 13:12:04]

These are separate options, can you put them on separate lines?

[Mark Mentovai, 2014/03/13 13:12:04]

How do you expect this to interact with the “fastbuild” option?

[mithro-old, 2014/03/16 11:09:43]

Done.

[mithro-old, 2014/03/16 11:09:43]

Changed -g3 to be conditional on fastbuild==X.

             ],
             'conditions' : [
               ['OS=="android"', {
                 'ldflags': [
                   '-Wl,--fatal-warnings',
                   # Only link with needed input sections. This is to avoid
                   # getting undefined reference to __cxa_bad_typeid in the CDU
                   # library.
                   '-Wl,--gc-sections',
                   # Warn in case of text relocations.
@@ skipping 1987 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',
   },
 }