From 7d8b6bd1265aa4de40bf490c21ce6ef1922489d7 Mon Sep 17 00:00:00 2001
From: Dane Springmeyer <dane@dbsgeo.com>
Date: Thu, 15 Jul 2010 16:29:39 +0000
Subject: [PATCH] scons: remove the '_CPPDEFFLAGS' variable, which otherwise
 would place -DNone in the compiler arguments when no other configure
 arguments are sent to scons

---
 SConstruct | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/SConstruct b/SConstruct
index 053dd2a93..add1131ad 100644
--- a/SConstruct
+++ b/SConstruct
@@ -1158,6 +1158,11 @@ if not HELP_REQUESTED:
     # export env so it is available in Sconscript files
     Export('env')
     
+    # clear the '_CPPDEFFLAGS' variable
+    # for unknown reasons this variable puts -DNone
+    # in the g++ args prompting unnecessary recompiles
+    env['_CPPDEFFLAGS'] = None
+
     
     if env['FAST']:
         # caching is 'auto' by default in SCons