Adding GYP_DEFINES=ASAN to enable ASAN build

build/common.gypi

 # Copyright (c) 2011 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 384 matching lines @@
 
     # These two variables can be set in GYP_DEFINES while running
     # |gclient runhooks| to let clang run a plugin in every compilation.
     # Only has an effect if 'clang=1' is in GYP_DEFINES as well.
     # Example:
     #     GYP_DEFINES='clang=1 clang_load=/abs/path/to/libPrintFunctionNames.dylib clang_add_plugin=print-fns' gclient runhooks
 
     'clang_load%': '',
     'clang_add_plugin%': '',
 
+    # Enable building with ASAN.
+    # See https://sites.google.com/a/chromium.org/dev/developers/testing/addresssanitizer
+    'asan%': 0,

[Nico, 2011/08/05 18:37:19]

Should setting this set 'clang' to 1 automatically?

[glotov, 2011/08/10 18:10:30]

Done.

+
     # Enable sampling based profiler.
     # See http://google-perftools.googlecode.com/svn/trunk/doc/cpuprofile.html
     'profiling%': '0',
 
     # Override whether we should use Breakpad on Linux. I.e. for Chrome bot.
     'linux_breakpad%': 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,
@@ skipping 1089 matching lines @@
           }],
           ['clang==1 and clang_load!="" and clang_add_plugin!=""', {
             'target_conditions': [
               ['_toolset=="target"', {
                 'cflags': [
                   '-Xclang', '-load', '-Xclang', '<(clang_load)',
                   '-Xclang', '-add-plugin', '-Xclang', '<(clang_add_plugin)',
                 ],
               }]],
           }],
+          ['clang==1 and asan==1', {
+            'target_conditions': [

[Nico, 2011/08/05 18:37:19]

I think the 'target_conditions'/ '_toolset' part should no longer be necessary
when people build with CC.host set as now described on
http://code.google.com/p/chromium/wiki/Clang

[glotov, 2011/08/10 18:10:30]

Done.

+              ['_toolset=="target"', {
+                'cflags': [
+                  '-fasan',
+                ],
+              }]],
+          }],
           ['no_strict_aliasing==1', {
             'cflags': [
               '-fno-strict-aliasing',
             ],
           }],
           ['linux_breakpad==1', {
             'cflags': [ '-g' ],
             'defines': ['USE_LINUX_BREAKPAD'],
           }],
           ['linux_use_heapchecker==1', {
@@ skipping 388 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',
   },
 }