cocos2d-x版本是3.2，根把网上的教程，成功生成lua_myclass_auto.cpp，lua_myclass_auto.hpp和MyClass.lua，头文件搜索路径也按教程的设了，xcode6.1编译的就报以上错误
Undefined symbols for architecture x86_64:
“register_all_myclass(lua_State*)”, referenced from:
AppDelegate::applicationDidFinishLaunching() in AppDelegate.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
在cocos ide下编译报cocos2d: :44: 
module ‘MyClass’ not found:，在网上找了下，要什么update runntime，到底什么意思啊，能说具体操作吗