Xcode7链接错误 normal arm64 bitcode enabled

以前的项目 放到Xcode7中运行时可能会遇到以下错误：You must rebuild it with bitcode enabled (Xcodesetting ENABLE_BITCODE)

未来Watch应用须包含Bitcode，iOS不强制，但Xcode7默认会开启Bitcode。

如何适配？

方法一：更新library使包含Bitcode，否则会出现以下中的警告；

[code]1
(null): URGENT:all bitcode will be dropped because‘/Users/myname/Library/Mobile Documents/com~apple~CloudDocs/foldername/appname/GoogleMobileAds.framework/GoogleMobileAds(GADSlot+AdEvents.o)‘ was built without bitcode. You must rebuild it with bitcode enabled (Xcode setting ENABLE_BITCODE), obtain an updated library from the vendor, or disable bitcode for this target. Note: This will be an error in the future.

方法二：关闭Bitcode

工程设置中 buildingsetting 中搜索bitcode 选择no

来源于：http://blog.csdn.net/niejiafa_131/article/details/48676957