From 97a5faa85895ca77679d794788731cf76b8704ce Mon Sep 17 00:00:00 2001
From: Stephen Kelly <steveire@gmail.com>
Date: Sun, 4 Dec 2011 16:45:39 +0100
Subject: [PATCH] Make it safe to call this method without creating duplicates.

---
 Source/cmLocalGenerator.cxx | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Source/cmLocalGenerator.cxx b/Source/cmLocalGenerator.cxx
index b02fc364b2..961de37ae5 100644
--- a/Source/cmLocalGenerator.cxx
+++ b/Source/cmLocalGenerator.cxx
@@ -1378,8 +1378,12 @@ void cmLocalGenerator::GetIncludeDirectories(std::vector<std::string>& dirs,
   // Store the automatic include paths.
   if(includeBinaryDir)
     {
-    dirs.push_back(this->Makefile->GetStartOutputDirectory());
-    emitted.insert(this->Makefile->GetStartOutputDirectory());
+    if(emitted.find(
+                this->Makefile->GetStartOutputDirectory()) == emitted.end())
+      {
+      dirs.push_back(this->Makefile->GetStartOutputDirectory());
+      emitted.insert(this->Makefile->GetStartOutputDirectory());
+      }
     }
   if(includeSourceDir)
     {