Xcode 6.2 and cocos2dx 3.4 错误

[111529 (齊葩)]

Undefined symbols for architecture x86_64:
“xxtea_decrypt(unsigned char*, unsigned int, unsigned char*, unsigned int, unsigned int*)”, referenced from:

麻烦cocos 解决一下哈 还有 在工程创建时就把 xxtea 加进去呗。