From fb009f00aeae142b7fbf6bbec78dd1e6ab2f7ae2 Mon Sep 17 00:00:00 2001
From: Nils Gladitz <nilsgladitz@gmail.com>
Date: Fri, 3 Oct 2014 15:10:51 +0200
Subject: CPackWiX: Work around RelativePath() returning an empty string for
 the root

---
 Source/CPack/WiX/cmCPackWIXGenerator.cxx | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Source/CPack/WiX/cmCPackWIXGenerator.cxx b/Source/CPack/WiX/cmCPackWIXGenerator.cxx
index 744280a..7e00027 100644
--- a/Source/CPack/WiX/cmCPackWIXGenerator.cxx
+++ b/Source/CPack/WiX/cmCPackWIXGenerator.cxx
@@ -850,6 +850,11 @@ void cmCPackWIXGenerator::AddDirectoryAndFileDefinitons(
   std::string relativeDirectoryPath =
     cmSystemTools::RelativePath(toplevel.c_str(), topdir.c_str());
 
+  if(relativeDirectoryPath.empty())
+    {
+    relativeDirectoryPath = ".";
+    }
+
   cmInstalledFile const* directoryInstalledFile =
     this->GetInstalledFile(relativeDirectoryPath);
 
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