From ed49a0b422d4415102e55ca1604dd913405e3d5c Mon Sep 17 00:00:00 2001
From: David Sansome <davidsansome@gmail.com>
Date: Tue, 8 Jun 2010 15:51:17 +0000
Subject: [PATCH] Make it possible to disable an engine again after enabling
 it, without having to delete the CMake cache

---
 AddEngine.cmake | 1 +
 1 file changed, 1 insertion(+)

diff --git a/AddEngine.cmake b/AddEngine.cmake
index cc79c614f..2ecabb82f 100644
--- a/AddEngine.cmake
+++ b/AddEngine.cmake
@@ -43,6 +43,7 @@ macro(add_engine engine lib_list src_list moc_list supported)
 
     # add to list of disabled engines
     set(ENGINES_DISABLED "${ENGINES_DISABLED} ${engine}")
+    set("HAVE_${name}" 0 CACHE INTERNAL ${name})
 
   endif(ENGINE_${name}_ENABLED AND NOT ENGINE_${name}_LIB_MISSING)