From 5e41ba8e4a25bec2b5d7c175f80a1ace0999a8ff Mon Sep 17 00:00:00 2001
From: Ben Boeckel <ben.boeckel@kitware.com>
Date: Fri, 17 Sep 2010 10:13:19 -0400
Subject: When using the API, check for Add vs. Remove

---
 Source/cmMakefile.cxx | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/Source/cmMakefile.cxx b/Source/cmMakefile.cxx
index 2908fa3..a9faa6b 100644
--- a/Source/cmMakefile.cxx
+++ b/Source/cmMakefile.cxx
@@ -3483,7 +3483,14 @@ void cmMakefile::RaiseScope(const char *var, const char *varDef)
     // directory's scope was initialized by the closure of the parent
     // scope, so we do not need to localize the definition first.
     cmMakefile* parent = plg->GetMakefile();
-    parent->AddDefinition(var, varDef);
+    if (varDef)
+      {
+      parent->AddDefinition(var, varDef);
+      }
+    else
+      {
+      parent->RemoveDefinition(var);
+      }
     }
   else
     {
-- 
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