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，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)
还有在cocos ide下编译说找不到myclass.lua，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