moves macro definition to `ccConfig.h`

cocos/base/CCRef.cpp

@@ -34,10 +34,6 @@ THE SOFTWARE.
 
 NS_CC_BEGIN
 
-// EXPERIMENTAL: Enable this in order to get rid of retain/release
-// when using the Garbage Collector
-#define CC_ENABLE_GC_FOR_NATIVE_OBJECTS 0
-
 #if CC_REF_LEAK_DETECTION
 static void trackRef(Ref* ref);
 static void untrackRef(Ref* ref);

cocos/base/ccConfig.h

@@ -329,6 +329,17 @@ THE SOFTWARE.
 #define CC_ENABLE_SCRIPT_BINDING 1
 #endif
 
+/** When CC_ENABLE_SCRIPT_BINDING and CC_ENABLE_GC_FOR_NATIVE_OBJECTS are both 1
+ then the Garbage collector will will release the native objects, only when the JS/Lua objets
+ are collected.
+ The benefit is that users don't need to retain/release the JS/Lua objects manually.
+
+ By default this behavior is disabled by default
+ */
+#ifndef CC_ENABLE_GC_FOR_NATIVE_OBJECTS
+#define CC_ENABLE_GC_FOR_NATIVE_OBJECTS 0
+#endif
+
 /** @def CC_CONSTRUCTOR_ACCESS
  * Indicate the init functions access modifier. If value equals to protected, then these functions are protected.
  * If value equals to public, these functions are public,

cocos/scripting/js-bindings/manual/ScriptingCore.cpp

@@ -76,10 +76,6 @@
 
 #define BYTE_CODE_FILE_EXT ".jsc"
 
-// EXPERIMENTAL: Enable this in order to get rid of retain/release
-// when using the Garbage Collector
-#define CC_ENABLE_GC_FOR_NATIVE_OBJECTS 0
-
 using namespace cocos2d;
 
 static std::string inData;