Add {release,debug}_extra_cflags for mac and linux

build/common.gypi

 # Copyright (c) 2009 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.
 
 {
   'variables': {
     # .gyp files should set chromium_code to 1 if they build Chromium-specific
     # code, as opposed to external code.  This variable is used to control
     # such things as the set of warnings to enable, and whether warnings are
     # treated as errors.
@@ skipping 149 matching lines @@
           },{
             'msvs_large_module_debug_link_mode%': '2',  # Yes
           }],
         ],
       }],
     ],
   },
   'target_defaults': {
     'variables': {
       'mac_release_optimization%': '3', # Use -O3 unless overridden
-      'mac_debug_optimization%': '0'    # Use -O0 unless overridden
+      'mac_debug_optimization%': '0',   # Use -O0 unless overridden
+      'release_extra_cflags%': '',
+      'debug_extra_cflags%': '',
     },
     'conditions': [
       ['branding=="Chrome"', {
         'defines': ['GOOGLE_CHROME_BUILD'],
       }, {  # else: branding!="Chrome"
         'defines': ['CHROMIUM_BUILD'],
       }],
       ['toolkit_views==1', {
         'defines': ['TOOLKIT_VIEWS=1'],
       }],
@@ skipping 43 matching lines @@
     'configurations': {
        # VCLinkerTool LinkIncremental values below:
        #   0 == default
        #   1 == /INCREMENTAL:NO
        #   2 == /INCREMENTAL
        # Debug links incremental, Release does not.
       'Debug': {
         'xcode_settings': {
           'COPY_PHASE_STRIP': 'NO',
           'GCC_OPTIMIZATION_LEVEL': '<(mac_debug_optimization)',
+          'OTHER_CFLAGS': [ '<@(debug_extra_cflags)', ],
         },
         'conditions': [
           [ 'OS=="win"', {
             'configuration_platform': 'Win32',
             'msvs_configuration_attributes': {
               'OutputDirectory': '$(SolutionDir)$(ConfigurationName)',
               'IntermediateDirectory': '$(OutDir)\\obj\\$(ProjectName)',
               'CharacterSet': '1',
             },
             'msvs_settings': {
               'VCCLCompilerTool': {
                 'Optimization': '0',
                 'PreprocessorDefinitions': ['_DEBUG'],
                 'BasicRuntimeChecks': '3',
                 'RuntimeLibrary': '1',
               },
               'VCLinkerTool': {
                 'LinkIncremental': '<(msvs_debug_link_incremental)',
               },
               'VCResourceCompilerTool': {
                 'PreprocessorDefinitions': ['_DEBUG'],
               },
             },
           }],
+         ['OS=="linux"', {
+           'cflags': [
+             '<@(debug_extra_cflags)',
+           ],
+         }],
         ],
       },
       'Release': {
         'defines': [
           'NDEBUG',
         ],
         'xcode_settings': {
           'DEAD_CODE_STRIPPING': 'YES',  # -Wl,-dead_strip
           'GCC_OPTIMIZATION_LEVEL': '<(mac_release_optimization)',
+          'OTHER_CFLAGS': [ '<@(release_extra_cflags)', ],
         },
         'conditions': [
           [ 'OS=="win" and msvs_use_common_release', {
             'msvs_props': ['release.vsprops'],
           }],
           [ 'OS=="win"', {
             'configuration_platform': 'Win32',
             'msvs_configuration_attributes': {
               'OutputDirectory': '$(SolutionDir)$(ConfigurationName)',
               'IntermediateDirectory': '$(OutDir)\\obj\\$(ProjectName)',
               'CharacterSet': '1',
             },
             'msvs_settings': {
               'VCLinkerTool': {
                 'LinkIncremental': '1',
               },
             },
           }],
+         ['OS=="linux"', {
+           'cflags': [
+             '<@(release_extra_cflags)',
+           ],
+         }],
         ],
       },
       'conditions': [
         [ 'OS=="win"', {
           # TODO(bradnelson): add a gyp mechanism to make this more graceful.
           'Purify': {
             'configuration_platform': 'Win32',
             'defines': [
               'NDEBUG',
               'PURIFY',
@@ skipping 145 matching lines @@
               # One can use '-gstabs' to enable building the debugging
               # information in STABS format for breakpad's dumpsyms.
             ],
             'ldflags': [
               '-rdynamic',  # Allows backtrace to resolve symbols.
             ],
           },
           'Release': {
             'variables': {
               'release_optimize%': '2',
-              'release_extra_cflags%': '',
             },
             'cflags': [
               '-O<(release_optimize)',
               # Don't emit the GCC version ident directives, they just end up
               # in the .comment section taking up binary size.
               '-fno-ident',
               # Put data and code in their own sections, so that unused symbols
               # can be removed at link time with --gc-sections.
               '-fdata-sections',
               '-ffunction-sections',
-              '<(release_extra_cflags)',
             ],
           },
         },
         'variants': {
           'coverage': {
             'cflags': ['-fprofile-arcs', '-ftest-coverage'],
             'ldflags': ['-fprofile-arcs'],
           },
           'profile': {
             'cflags': ['-pg', '-g'],
@@ skipping 299 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',
   },
 }