From bd7ffbc258c1ee206d65dd6cc50c207b28057ae2 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Wed, 18 Sep 2002 10:40:07 -0400
Subject: ENH: If SET(VAR) is called with no other arguments, remove the
 definition of VAR.

---
 Source/cmSetCommand.cxx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Source/cmSetCommand.cxx b/Source/cmSetCommand.cxx
index 3856444..6065780 100644
--- a/Source/cmSetCommand.cxx
+++ b/Source/cmSetCommand.cxx
@@ -24,9 +24,10 @@ bool cmSetCommand::InitialPass(std::vector<std::string> const& args)
     this->SetError("called with incorrect number of arguments");
     return false;
     }
-  // SET (VAR ) // this is a no-op
+  // SET (VAR) // Removes the definition of VAR.
   if (args.size() == 1)
     {
+    m_Makefile->RemoveDefinition(args[0].c_str());
     return true;
     }
 // here are the options 
-- 
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