Preprocessor option for logging functions (#567)

* Update showoptions.cmake

* Update config.cmake.dist

* Example of preprocessor usage

Other work must continue for PR https://github.com/azerothcore/azerothcore-wotlk/pull/519

conf/config.cmake.dist

@@ -10,3 +10,4 @@ option(WITH_MESHEXTRACTOR  "Build meshextractor (alpha)"
 option(WITHOUT_GIT         "Disable the GIT testing routines"                            0)
 option(DISABLE_EXTRAS      "Set to 1 to disable extra features optimizing performances"  0)
 option(DISABLE_VMAP_CHECKS "Remove DisableMgr Checks on vmap"                            0)
+option(DISABLE_EXTRA_LOGS  "Disable extra log functions that can be CPU intensive"       1)

modules/worldengine/lib-collision/src/Management/MMapManager.cpp

@@ -34,7 +34,9 @@ namespace MMAP
         FILE* file = fopen(fileName, "rb");
         if (!file)
         {
-            ;//sLog->outDebug(LOG_FILTER_MAPS, "MMAP:loadMapData: Error: Could not open mmap file '%s'", fileName);
+#if defined(DISABLE_EXTRAS) || defined(DISABLE_EXTRA_LOGS)
+            sLog->outDebug(LOG_FILTER_MAPS, "MMAP:loadMapData: Error: Could not open mmap file '%s'", fileName);
+#endif
             delete [] fileName;
             return false;
         }

src/cmake/showoptions.cmake

@@ -121,5 +121,12 @@ else()
   message("* Disable vmap DisableMgr checks     : No  (default)")
 endif()
 
+if( DISABLE_EXTRA_LOGS )
+  message("* Disable extra logging functions    : Yes (default)")
+  add_definitions(-DDISABLE_EXTRA_LOGS)
+else()
+  message("* Disable extra logging functions    : No")
+endif()
+
 message("")