From 247a132422bd3f1c97f5fcf8457d5a105ab65687 Mon Sep 17 00:00:00 2001
From: David Cole <david.cole@kitware.com>
Date: Wed, 14 Mar 2012 17:36:31 -0400
Subject: [PATCH] Allow txt files as ExtraSources in object library targets

Necessary for the Xcode generator, in which the CMakeLists.txt
files are added as sources merely for convenient access, without
any associated custom command.
---
 Source/cmGeneratorTarget.cxx | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Source/cmGeneratorTarget.cxx b/Source/cmGeneratorTarget.cxx
index 369eb5cf2..b5fcae267 100644
--- a/Source/cmGeneratorTarget.cxx
+++ b/Source/cmGeneratorTarget.cxx
@@ -74,7 +74,10 @@ void cmGeneratorTarget::ClassifySources()
     else
       {
       this->ExtraSources.push_back(sf);
-      if(isObjLib) { badObjLib.push_back(sf); }
+      if(isObjLib && cmSystemTools::LowerCase(sf->GetExtension()) != "txt")
+        {
+        badObjLib.push_back(sf);
+        }
       }
     }