--- SConstruct.orig	2015-12-02 19:01:34 UTC
+++ SConstruct
@@ -840,9 +840,9 @@ if has_option('variables-help'):
     print env_vars.GenerateHelpText(env)
     Exit(0)
 
-unknown_vars = env_vars.UnknownVariables()
-if unknown_vars:
-    env.FatalError("Unknown variables specified: {0}", ", ".join(unknown_vars.keys()))
+#unknown_vars = env_vars.UnknownVariables()
+#if unknown_vars:
+#    env.FatalError("Unknown variables specified: {0}", ", ".join(unknown_vars.keys()))
 
 def set_config_header_define(env, varname, varval = 1):
     env['CONFIG_HEADER_DEFINES'][varname] = varval