Bug#18374703 COMPILATION ERROR WITH -DENABLE_DEBUG_SYNC=0 AND -DWITH_DEBUG=ON

The combination cmake -DENABLE_DEBUG_SYNC=0 -DWITH_DEBUG=ON fails to build.

Fix: Remove option ENABLE_DEBUG_SYNC.

CMakeLists.txt

-# Copyright (c) 2006, 2016, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2006, 2017, Oracle and/or its affiliates. All rights reserved.
 # 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -253,8 +253,7 @@ IF (WITH_ASAN)
 ENDIF()
 
 
-OPTION(ENABLE_DEBUG_SYNC "Enable debug sync (debug builds only)" ON) 
-IF(ENABLE_DEBUG_SYNC) 
+IF(CMAKE_BUILD_TYPE MATCHES "Debug" OR WITH_DEBUG)
   SET(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -DENABLED_DEBUG_SYNC") 
   SET(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -DENABLED_DEBUG_SYNC") 
 ENDIF()