title: IOS integrated unity 4.6.3 project(64-bit && IL2CPP). Appear the following such a mistake, how to fix it?
body: <p>I want to add Unity to an existing ios Project,I have matched all the configuration of the two project, and import the frameworks. 
  I set Other Linker Flags : -weak_framework; -weak-lSystem; CoreMotion. just like the Unity Project.
  and the error is：
  clang: error: no such file or directory: 'CoreMotion'
  when I deleted "CoreMotion" in Other Linker Flags, error changes:
  ld: framework not found -weak-lSystem</p>
  
  <p>how to fix it?</p>