From cb8f0f7c813f718bf8a8f8896b52de03bc9c6106 Mon Sep 17 00:00:00 2001
From: Chuck Atkins <chuck.atkins@kitware.com>
Date: Mon, 1 Sep 2014 13:40:27 -0400
Subject: [PATCH] FindGTK2: Fix missing optional include dirs.

FindGTK2 was adding optional include directories to the
interface include dirs regardless of whether or not they
existed.  This ensures that the directories only get added
if they are actually found. This is particularly a problem
on Solaris where the gtk2 libs and headers might exist but
the FreeType2 headers might not.
---
 Modules/FindGTK2.cmake | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Modules/FindGTK2.cmake b/Modules/FindGTK2.cmake
index eaa5e550e..67dc0ebdc 100644
--- a/Modules/FindGTK2.cmake
+++ b/Modules/FindGTK2.cmake
@@ -540,7 +540,11 @@ function(_GTK2_ADD_TARGET _var)
         endif()
 
         if(_${_var}_OPTIONAL_INCLUDES)
-            _GTK2_ADD_TARGET_INCLUDE_DIRS(${_var} ${_${_var}_OPTIONAL_INCLUDES})
+            foreach(_D ${_${_var}_OPTIONAL_INCLUDES})
+                if(_D)
+                    _GTK2_ADD_TARGET_INCLUDE_DIRS(${_var} ${_D})
+                endif()
+            endforeach()
         endif()
 
         if(GTK2_USE_IMPORTED_TARGETS)