From fb8b30663864d7be1fe3c4e051a35db4743a589c Mon Sep 17 00:00:00 2001
From: Fernando Cacciola <fernando.cacciola@geometryfactory.com>
Date: Mon, 1 Sep 2008 21:14:20 +0000
Subject: [PATCH] Fixed *REALLY ODD* problem with CMake not properly testing
 for CGAL_REFERENCE_DIR

---
 Installation/CMakeLists.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Installation/CMakeLists.txt b/Installation/CMakeLists.txt
index d97fb7a8269..64bcf1d7a2b 100644
--- a/Installation/CMakeLists.txt
+++ b/Installation/CMakeLists.txt
@@ -24,7 +24,9 @@ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CGAL_CMAKE_MODULE_PATH} )
 # This allows else(), endif(), etc... (without repeating the expression)
 set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS true)
 
-if ( ${CGAL_REFERENCE_CACHE_DIR} )
+message( STATUS "CGAL_REFERENCE_CACHE_DIR=${CGAL_REFERENCE_CACHE_DIR}" )
+
+if ( NOT "${CGAL_REFERENCE_CACHE_DIR}" STREQUAL "" )
   if ( EXISTS ${CGAL_REFERENCE_CACHE_DIR} )
     if ( EXISTS ${CGAL_REFERENCE_CACHE_DIR}/CMakeCache.txt )
       message( STATUS "Loading reference cache from ${CGAL_REFERENCE_CACHE_DIR}" )