From 2bf22a4b908592e363fc9aa93b3d09fbb5387b4d Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Mon, 22 Jun 2015 10:49:36 -0400
Subject: [PATCH] QtAutogen: Add comment explaining why rcc cannot use
 PRE_BUILD

---
 Source/cmQtAutoGenerators.cxx | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Source/cmQtAutoGenerators.cxx b/Source/cmQtAutoGenerators.cxx
index d2f6e3640..d8f826cc7 100644
--- a/Source/cmQtAutoGenerators.cxx
+++ b/Source/cmQtAutoGenerators.cxx
@@ -440,6 +440,9 @@ bool cmQtAutoGenerators::InitializeAutogenTarget(cmTarget* target)
               this->ListQt4RccInputs(sf, depends);
               }
 #if defined(_WIN32) && !defined(__CYGWIN__)
+            // Cannot use PRE_BUILD because the resource files themselves
+            // may not be sources within the target so VS may not know the
+            // target needs to re-build at all.
             usePRE_BUILD = false;
 #endif
             }