Initial patch from Will.

src/platform/pam_offline/SConstruct

 # -*- python -*-
 
 # Copyright (c) 2009-2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import os
 
 env = Environment()
 
 pam_sources = env.Split("""utils.cc
-                        pam_prompt_wrapper.cc
-                        credentials.cc
                         username_password.cc
                         username_password_fetcher.cc
-                        authenticator.cc
+                        credentials.cc
+                        pam_prompt_wrapper.cc
                         pam_offline.cc""")
 
 test_sources = env.Split("""pam_offline_testrunner.cc
                          username_password_unittest.cc
                          pam_prompt_wrapper_unittest.cc
                          username_password_fetcher_unittest.cc
-                         authenticator_unittest.cc
                          pam_offline_unittest.cc
                          """)
 
 env.Append(
     CPPPATH=['..'],
     CCFLAGS=['-g'],
     LINKFLAGS=['-fPIC'],
-    LIBS=['pam', 'ssl', 'base', 'rt', 'pthread', 'chromeos'],
+    LIBS=['pam', 'ssl', 'base', 'rt', 'pthread', 'chromeos', 'crosapi'],
 )
+
+env.ParseConfig('pkg-config --cflags --libs dbus-glib-1')
+
 for key in Split('CC CXX AR RANLIB LD NM CFLAGS CCFLAGS'):
   value = os.environ.get(key)
   if value != None:
     env[key] = Split(value)
 env['CCFLAGS'] += ['-fPIC', '-fno-exceptions', '-Wall']
 
 # Fix issue with scons not passing some vars through the environment.
 for key in Split('PKG_CONFIG_LIBDIR PKG_CONFIG_PATH SYSROOT'):
   if os.environ.has_key(key):
     env['ENV'][key] = os.environ[key]
 
 # Enable local account only if user has specified one
 if os.path.exists('pam_localaccount.h'):
   print """
 WARNING: pam local account is enabled!  If you don't want this, remove
 pam_localaccount.h.
 """
   env.Append(CPPDEFINES=['CHROMEOS_PAM_LOCALACCOUNT'])
 
 env_lib = env.Clone()
 env_lib.SharedLibrary('chromeos_pam_offline', pam_sources)
 
 env_test = env.Clone()
 env_test.Append(LIBS=['gtest'])
 env_test.Program('pam_offline_unittests', pam_sources + test_sources)