Added first shot at a development shell

src/SConscript

 # 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 46 matching lines @@
   'simulator:arm': ['simulator-arm.cc'],
   'os:linux':  ['platform-linux.cc'],
   'os:macos':  ['platform-macos.cc'],
   'os:nullos': ['platform-nullos.cc'],
   'os:win32':  ['platform-win32.cc'],
   'mode:release': [],
   'mode:debug': ['objects-debug.cc', 'prettyprinter.cc']
 }
 
 
+D8_FILES = {
+  'all': [
+    'd8.cc'
+  ],
+  'console:readline': [
+    'd8-readline.cc'
+  ]
+}
+
+
 LIBRARY_FILES = '''
 runtime.js
 v8natives.js
 array.js
 string.js
 uri.js
 math.js
 messages.js
 apinatives.js
 debug-delay.js
@@ skipping 20 matching lines @@
 def ConfigureObjectFiles():
   env = Environment()
   env.Replace(**context.flags['v8'])
   context.ApplyEnvOverrides(env)
   env['BUILDERS']['JS2C'] = Builder(action=js2c.JS2C)
   env['BUILDERS']['Snapshot'] = Builder(action='$SOURCE $TARGET --logfile $LOGFILE')
 
   # Build the standard platform-independent source files.
   source_files = context.GetRelevantSources(SOURCES)
 
+  d8_files = context.GetRelevantSources(D8_FILES)
+  d8_js = env.JS2C('d8-js.cc', 'd8.js', TYPE='D8')
+  d8_js_obj = context.ConfigureObject(env, d8_js, CPPPATH=['.'])
+  d8_objs = [context.ConfigureObject(env, [d8_files]), d8_js_obj]
+
   # Combine the JavaScript library files into a single C++ file and
   # compile it.
   library_files = [s for s in LIBRARY_FILES]
   library_files.append('macros.py')
-  libraries_src, libraries_empty_src = env.JS2C(['libraries.cc', 'libraries-empty.cc'], library_files)
+  libraries_src, libraries_empty_src = env.JS2C(['libraries.cc', 'libraries-empty.cc'], library_files, TYPE='CORE')
   libraries_obj = context.ConfigureObject(env, libraries_src, CPPPATH=['.'])
 
   # Build JSCRE.
   jscre_env = env.Copy()
   jscre_env.Replace(**context.flags['jscre'])
   jscre_files = [join('third_party', 'jscre', s) for s in JSCRE_FILES]
   jscre_obj = context.ConfigureObject(jscre_env, jscre_files)
 
   # Build dtoa.
   dtoa_env = env.Copy()
   dtoa_env.Replace(**context.flags['dtoa'])
   dtoa_files = ['dtoa-config.c']
   dtoa_obj = context.ConfigureObject(dtoa_env, dtoa_files)
 
   source_objs = context.ConfigureObject(env, source_files)
   non_snapshot_files = [jscre_obj, dtoa_obj, source_objs]
 
   # Create snapshot if necessary.
   empty_snapshot_obj = context.ConfigureObject(env, 'snapshot-empty.cc')
   if context.use_snapshot:
     mksnapshot_src = 'mksnapshot.cc'
     mksnapshot = env.Program('mksnapshot', [mksnapshot_src, libraries_obj, non_snapshot_files, empty_snapshot_obj], PDB='mksnapshot.exe.pdb')
     snapshot_cc = env.Snapshot('snapshot.cc', mksnapshot, LOGFILE=File('snapshot.log').abspath)
     snapshot_obj = context.ConfigureObject(env, snapshot_cc, CPPPATH=['.'])
     libraries_obj = context.ConfigureObject(env, libraries_empty_src, CPPPATH=['.'])
   else:
     snapshot_obj = empty_snapshot_obj
 
-  return [non_snapshot_files, libraries_obj, snapshot_obj]
+  library_objs = [non_snapshot_files, libraries_obj, snapshot_obj]
+  return (library_objs, d8_objs)
 
 
-library_objects = ConfigureObjectFiles()
-Return('library_objects')
+(library_objs, d8_objs) = ConfigureObjectFiles()
+Return('library_objs d8_objs')