title: Xcode 8: Symbol(s) not found for architecture arm64 for pods
body: <p>After updating to Xcode 8, the app won't run on devices, only on the simulator. The errors are thrown for all pods added to the project:</p>
  
  <pre><code>Undefined symbols for architecture arm64:
    "_OBJC_CLASS_$_AFNetworkReachabilityManager", referenced from:
        objc-class-ref in FeedViewController.o
    "_OBJC_CLASS_$_TSMessage", referenced from:
        l_OBJC_$_CATEGORY_TSMessage_$_Override in NotificationMessenger.o
        objc-class-ref in NotificationMessenger.o
    "_OBJC_CLASS_$_AFHTTPRequestSerializer", referenced from:
        objc-class-ref in HTTPSessionTask.o
    "_OBJC_CLASS_$_AFJSONRequestSerializer", referenced from:
        objc-class-ref in HTTPSessionTask.o
    "_OBJC_METACLASS_$_SWTableViewCell", referenced from:
        _OBJC_METACLASS_$_MessagesCell in MessagesCell.o
        _OBJC_METACLASS_$_PaymentMethodCell in PaymentMethodCell.o
        _OBJC_METACLASS_$_SwipeTitleCell in SwipeTitleCell.o
    "_OBJC_CLASS_$_FBRequestConnection", referenced from:
        objc-class-ref in FacebookManager.o
    "_OBJC_CLASS_$_SWTableViewCell", referenced from:
        _OBJC_CLASS_$_MessagesCell in MessagesCell.o
        _OBJC_CLASS_$_PaymentMethodCell in PaymentMethodCell.o
        _OBJC_CLASS_$_SwipeTitleCell in SwipeTitleCell.o
    "_OBJC_CLASS_$_FBRequest", referenced from:
        objc-class-ref in FacebookManager.o
    "_OBJC_CLASS_$_AFURLSessionManager", referenced from:
        objc-class-ref in HTTPSessionTask.o
    "_OBJC_CLASS_$_Branch", referenced from:
        objc-class-ref in MyImpactViewController.o
        objc-class-ref in UINavigationController+Activity.o
        objc-class-ref in AppDelegate.o
    "_OBJC_CLASS_$_FBSession", referenced from:
        objc-class-ref in FacebookManager.o
        objc-class-ref in ExternalFacebookCommand.o
  ld: symbol(s) not found for architecture arm64
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  </code></pre>
  
  <p>For each of the files, this warning is also thrown:</p>
  
  <pre><code>file was built for archive which is not the architecture being linked (arm64)
  </code></pre>
  
  <p>Active architectures are OK, I've tried deleting derived data folder, reinstalling the pods, setting Build Active Architectures Only to YES and NO, but nothing works.</p>
  
  <p>My Podfile looks like this:</p>
  
  <pre><code>platform :ios, '8.0'
  workspace 'Purple'
  target 'Purple' do
  pod 'AFNetworking', '2.6.3'
  pod 'SAMKeychain', '~&gt; 1.3'
  pod 'TSMessages'
  pod 'Facebook-iOS-SDK', '~&gt; 3.23.2'
  pod 'SWTableViewCell'
  pod 'CardIO'
  pod 'Parse'
  pod 'PureLayout'
  pod 'Branch'
  pod 'DZNEmptyDataSet'
  end
  </code></pre>