Fiix LPBUG#798629

Define USE_MARIA_FOR_TMP_TABLES preprocessor constant by default if Aria engine is compiled in.
Use CMake variable WITH_ARIA_TMP_TABLES to control the temp table engine setting.

CMakeLists.txt

@@ -318,10 +318,12 @@ ENDIF(NOT WITHOUT_PARTITION_STORAGE_ENGINE)
 # Special handling for tmp tables with the Aria engine
 IF(WITH_ARIA_STORAGE_ENGINE)
   ADD_DEFINITIONS(-DWITH_ARIA_STORAGE_ENGINE)
-  IF(WITH_MARIA_TMP_TABLES)
+  SET(WITH_ARIA_TMP_TABLES 1 CACHE BOOL "Use Aria for temporary tables")
+  IF(WITH_ARIA_TMP_TABLES)
+    MESSAGE(STATUS "Using Aria for temporary tables")
     ADD_DEFINITIONS(-DUSE_MARIA_FOR_TMP_TABLES)
-  ENDIF(WITH_MARIA_TMP_TABLES)
-ENDIF(WITH_ARIA_STORAGE_ENGINE)
+  ENDIF()
+ENDIF()
 
 ADD_DEFINITIONS(${STORAGE_ENGINE_DEFS})