Added a profiling option (prof) to the SCons build. Currently...

SConstruct

 # Copyright 2008 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 183 matching lines @@
       'CCFLAGS':      ['-g', '-O0']
     }
   },
   'msvc': {
     'all': {
       'CCFLAGS': ['/nologo'],
     },
     'library:shared': {
       'CPPDEFINES': ['USING_V8_SHARED']
     },
+    'prof:on': {
+      'LINKFLAGS': ['/MAP']
+    },
     'mode:release': {
       'CCFLAGS':   ['/Ox', '/MT', '/GF'],
       'LINKFLAGS': ['/OPT:REF', '/OPT:ICF']
     },
     'mode:debug': {
       'CCFLAGS':   ['/Od', '/MTd'],
       'LINKFLAGS': ['/DEBUG']
     }
   }
 }
@@ skipping 59 matching lines @@
   'arch': {
     'values':['arm', 'ia32'],
     'default': ARCH_GUESS,
     'help': 'the architecture to build for'
   },
   'snapshot': {
     'values': ['on', 'off'],
     'default': 'off',
     'help': 'build using snapshots for faster start-up'
   },
+  'prof': {
+    'values': ['on', 'off'],
+    'default': 'off',
+    'help': 'enable profiling of build target'
+  },
   'library': {
     'values': ['static', 'shared'],
     'default': 'static',
     'help': 'the type of library to produce'
   },
   'wordsize': {
     'values': ['64', '32'],
     'default': WORDSIZE_GUESS,
     'help': 'the word size'
   },
@@ skipping 37 matching lines @@
       Abort("Illegal value for option %s '%s'." % (option, s))
       return False
   return True
 
 
 def VerifyOptions(env):
   if not IsLegal(env, 'mode', ['debug', 'release']):
     return False
   if not IsLegal(env, 'sample', ["shell", "process"]):
     return False
+  if env['os'] == 'win32' and env['library'] == 'shared' and env['prof'] == 'on':
+    Abort("Profiling on windows only supported for static library.")
   for (name, option) in SIMPLE_OPTIONS.iteritems():
     if (not option.get('default')) and (name not in ARGUMENTS):
       message = ("A value for option %s must be specified (%s)." %
           (name, ", ".join(option['values'])))
       Abort(message)
     if not env[name] in option['values']:
       message = ("Unknown %s value '%s'.  Possible values are (%s)." %
           (name, env[name], ", ".join(option['values'])))
       Abort(message)
 
@@ skipping 182 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()