Update SCons to latest checkpoint release, 1.2.0.d20090113....

third_party/scons/scons-local/SCons/SConf.py

 """SCons.SConf
 
 Autoconf-like configuration support.
 """
 
 #
-# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 The SCons Foundation
+# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 The SCons Foundation
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the
 # "Software"), to deal in the Software without restriction, including
 # without limitation the rights to use, copy, modify, merge, publish,
 # distribute, sublicense, and/or sell copies of the Software, and to
 # permit persons to whom the Software is furnished to do so, subject to
 # the following conditions:
 #
 # The above copyright notice and this permission notice shall be included
 # in all copies or substantial portions of the Software.
 #
 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
 # KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 # WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #
 
-__revision__ = "src/engine/SCons/SConf.py 3842 2008/12/20 22:59:52 scons"
+__revision__ = "src/engine/SCons/SConf.py 3897 2009/01/13 06:45:54 scons"
 
 import os
 import re
 import string
 import StringIO
 import sys
 import traceback
 import types
 
 import SCons.Action
@@ skipping 156 matching lines @@
         Return everything written to orig since the Streamer was created.
         """
         return self.s.getvalue()
 
     def flush(self):
         if self.orig:
             self.orig.flush()
         self.s.flush()
         
 
-class SConfBuildTask(SCons.Taskmaster.Task):
+class SConfBuildTask(SCons.Taskmaster.AlwaysTask):
     """
     This is almost the same as SCons.Script.BuildTask. Handles SConfErrors
     correctly and knows about the current cache_mode.
     """
     def display(self, message):
         if sconf_global.logstream:
             sconf_global.logstream.write("scons: Configure: " + message + "\n")
 
     def display_cached_string(self, bi):
         """
@@ skipping 786 matching lines @@
     if libs == []:
         libs = [None]
 
     if not SCons.Util.is_List(libs):
         libs = [libs]
 
     res = SCons.Conftest.CheckLib(context, libs, None, prog_prefix,
             call = call, language = language, autoadd = autoadd)
     context.did_show_result = 1
     return not res