Adding build script changes to support LiveObjectList functionality.

SConstruct

 # Copyright 2010 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 109 matching lines @@
       'CPPDEFINES':   ['ENABLE_VMSTATE_TRACKING', 'ENABLE_HEAP_PROTECTION'],
     },
     'profilingsupport:on': {
       'CPPDEFINES':   ['ENABLE_VMSTATE_TRACKING', 'ENABLE_LOGGING_AND_PROFILING'],
     },
     'debuggersupport:on': {
       'CPPDEFINES':   ['ENABLE_DEBUGGER_SUPPORT'],
     },
     'inspector:on': {
       'CPPDEFINES':   ['INSPECTOR'],
+    },
+    'liveobjectlist:on': {
+      'CPPDEFINES':   ['ENABLE_DEBUGGER_SUPPORT', 'INSPECTOR',
+                       'LIVE_OBJECT_LIST', 'OBJECT_PRINT'],
     }
   },
   'gcc': {
     'all': {
       'CCFLAGS':      ['$DIALECTFLAGS', '$WARNINGFLAGS'],
       'CXXFLAGS':     ['$CCFLAGS', '-fno-rtti', '-fno-exceptions'],
     },
     'visibility:hidden': {
       # Use visibility=default to disable this.
       'CXXFLAGS':     ['-fvisibility=hidden']
@@ skipping 605 matching lines @@
   'debuggersupport': {
     'values': ['on', 'off'],
     'default': 'on',
     'help': 'enable debugging of JavaScript code'
   },
   'inspector': {
     'values': ['on', 'off'],
     'default': 'off',
     'help': 'enable inspector features'
   },
+  'liveobjectlist': {
+    'values': ['on', 'off'],
+    'default': 'off',
+    'help': 'enable live object list features in the debugger'
+  },
   'soname': {
     'values': ['on', 'off'],
     'default': 'off',
     'help': 'turn on setting soname for Linux shared library'
   },
   'msvcrt': {
     'values': ['static', 'shared'],
     'default': 'static',
     'help': 'the type of Microsoft Visual C++ runtime library to use'
   },
@@ skipping 237 matching lines @@
     options['profilingsupport'] = 'on'
   if os == 'win32' and options['pgo'] != 'off' and options['msvcltcg'] == 'off':
     if 'msvcltcg' in ARGUMENTS:
       print "Warning: forcing msvcltcg on as it is required for pgo (%s)" % options['pgo']
     options['msvcltcg'] = 'on'
   if options['arch'] == 'mips':
     if ('regexp' in ARGUMENTS) and options['regexp'] == 'native':
       # Print a warning if native regexp is specified for mips
       print "Warning: forcing regexp to interpreted for mips"
     options['regexp'] = 'interpreted'
+  if options['liveobjectlist'] == 'on':
+    if (options['debuggersupport'] != 'on') or (options['mode'] == 'release'):
+      # Print a warning that liveobjectlist will implicitly enable the debugger
+      print "Warning: forcing debuggersupport on for liveobjectlist"
+    options['debuggersupport'] = 'on'
 
 
 def ParseEnvOverrides(arg, imports):
   # The environment overrides are in the format NAME0:value0,NAME1:value1,...
   # The environment imports are in the format NAME0,NAME1,...
   overrides = {}
   for var in imports.split(','):
     if var in os.environ:
       overrides[var] = os.environ[var]
   for override in arg.split(','):
@@ skipping 154 matching lines @@
 # version of scons.  Also, there's a bug in some revisions that
 # doesn't allow this flag to be set, so we swallow any exceptions.
 # Lovely.
 try:
   SetOption('warn', 'no-deprecated')
 except:
   pass
 
 
 Build()