From bc280f1c8108809abed700c2fe039340bb9ae1c0 Mon Sep 17 00:00:00 2001
From: "Daniele E. Domenichelli" <daniele.domenichelli@iit.it>
Date: Wed, 13 Nov 2013 09:02:56 +0100
Subject: [PATCH] set: Fix handling of empty value with PARENT_SCOPE

Just as

  set(VAR "")

sets VAR to an empty string in the current scope, the code

  set(VAR "" PARENT_SCOPE)

is documented to set the variable to an empty string in the parent
scope.  Fix the implementation to make it so.
---
 Source/cmSetCommand.cxx | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/Source/cmSetCommand.cxx b/Source/cmSetCommand.cxx
index 22b43832b..bb193bf9f 100644
--- a/Source/cmSetCommand.cxx
+++ b/Source/cmSetCommand.cxx
@@ -122,15 +122,8 @@ bool cmSetCommand
 
   if (parentScope)
     {
-    if (value.empty())
-      {
-      this->Makefile->RaiseScope(variable, 0);
-      }
-    else
-      {
-      this->Makefile->RaiseScope(variable, value.c_str());
-      }
-      return true;
+    this->Makefile->RaiseScope(variable, value.c_str());
+    return true;
     }