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To anyone who is having similar issues in Bata 6. I solved it by deleting the content in /Users/[your username]/Library/Developer/Xcode/DerivedData as can be seen in this post Suddenly getting compiler crash "arrayForceCast" in Swift XCode beta 6

Original post:

I just installed Xcode beta 6 and am getting very unusual errors. I cannot figure out what they are. 

Undefined symbols for architecture arm64:
"__TFSsoi1oUSs17_RawOptionSetType_USs21BitwiseOperationsTypeSs9Equatable__FTQ_Q__Q_",   referenced from:
  __TFC9CoolSpots29ProfileSettingsViewController13turnOnOffPushfS0_FCSo8UISwitchT_ in ProfileSettingsViewController.o
  __TFC9CoolSpots11AppDelegate11applicationfS0_FTCSo13UIApplication29didFinishLaunchingWithOptionsGSqCSo12NSDictionary__Sb in AppDelegate.o
"__TFSs15_arrayForceCastU___FGSaQ__GSaQ0__", referenced from:
  __TFC9CoolSpots8LocationcfMS0_FT6objectCSo8PFObject_S0_ in Location.o
  __TFC9CoolSpots19ShareViewController7mapViewfS0_FTGSQCSo9MKMapView_21didAddAnnotationViewsGSQGSaPSs9AnyObject____T_ in ShareViewController.o
  __TFC9CoolSpots23LoginMenuViewController7FBLoginfS0_FT_T_ in LoginMenuViewController.o
  __TFC9CoolSpots21ProfileViewController7mapViewfS0_FTGSQCSo9MKMapView_21didAddAnnotationViewsGSQGSaPSs9AnyObject____T_ in ProfileViewController.o
  __TFFC9CoolSpots21ProfileViewController11viewDidLoadFS0_FT_T_U_FTGSqGSaPSs9AnyObject___GSqCSo7NSError__T_ in ProfileViewController.o
  __TFFFC9CoolSpots21ProfileViewController11viewDidLoadFS0_FT_T_U_FTGSqGSaPSs9AnyObject___GSqCSo7NSError__T_U0_FTGSqGSaPS1____GSqS2___T_ in ProfileViewController.o
  __TFFFC9CoolSpots21ProfileViewController11viewDidLoadFS0_FT_T_U0_FTGSqCSo8PFObject_GSqCSo7NSError__T_U0_FTGSqGSaPSs9AnyObject___GSqS2___T_ in ProfileViewController.o
  ...
"__TFSs26_forceBridgeFromObjectiveCU__FTPSs9AnyObject_MQ__Q_", referenced from:
  __TFC9CoolSpots8LocationcfMS0_FT11coordinatesVSC22CLLocationCoordinate2D15relatedActivityCSo7NSArray8objectIdSS7addressSS_S0_ in Location.o
  __TFC9CoolSpots8LocationcfMS0_FT6objectCSo8PFObject_S0_ in Location.o
  __TFC9CoolSpots19ShareViewController14viewWillAppearfS0_FSbT_ in ShareViewController.o
  __TFC9CoolSpots19ShareViewController15prepareForSeguefS0_FTGSQCSo17UIStoryboardSegue_6senderGSQPSs9AnyObject___T_ in ShareViewController.o
  __TFC9CoolSpots19ShareViewController21cameraViewTookPicturefS0_FCSo7UIImageT_ in ShareViewController.o
  __TFFC9CoolSpots19ShareViewController14reverseGeocodeFS0_FGSqCSo10CLLocation_T_U_FTGSQGSaPSs9AnyObject___GSQCSo7NSError__T_ in ShareViewController.o
  __TFC9CoolSpots27ActivityTableViewController11viewDidLoadfS0_FT_T_ in ActivityTableViewController.o
  ...
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Community
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sachaservan
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    It means that certain symbols (code) aren't getting built for the arm64 architecture. You are probably targeting a 64-bit device. Try instead building for the simulator to see if you have the same problem. – ThomasW Aug 20 '14 at 00:55
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    If there is a question in here, I can't find it. If this is a suggestion to others, it should be an answer to an existing question or it just doesn't belong on SO. – Daniel Brim Aug 20 '14 at 04:32

3 Answers3

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Yes! I too was completely confused by these errors.

Then I remembered to delete the "DerivedData" for the project (or as I did, the entire folder), found here:

~/Library/Developer/Xcode/DerivedData

(with thanks to @drmarvelous)

coco
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    +1 BTW, if you go to "Settings" in the Xcode "Preferences" and tap on the "Locations" tab, there's a little arrow link next to the "Derived Data" settings that will take you directly to this folder. It saves you from having to remember this cryptic path. – Rob Sep 01 '14 at 21:10
  • I'm seeing this problem show up in beta 7 except none of the proposed solutions are working. Any ideas? – Kyle Rosenbluth Sep 03 '14 at 01:45
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Had the same strange errors after upgrading to xcode 6 beta 6. For me the problem got fixed with a Product -> Clean. And if that does not fix the errors hold down option key and click again on Product in the Menubar then you will see in the dropdown menu Clean Build Folder... click on that.

Fred
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  • Or just use [Watchdog](https://itunes.apple.com/us/app/watchdog-for-xcode/id734258109?mt=12) app. This little helper automatically cleans your xcode projects. – Fred Aug 24 '14 at 17:21
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I had the same problem, but deleting the "DerivedData" folder alone didn't work for me. I had to change the Build Location to "Unique" in the advanced section of Locations. I believe that this might be because I had to quarantine xcode to get it open using the command:

sudo xattr -dr com.apple.quarantine /Applications/Xcode6-Beta6.app

But I'm not sure about that.

JTerry
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  • Did you exit Xcode before deleting this derived data folder? Whenever Xcode gets a little weird, I go through this derived data folder dance, and it fixes it, so I'm surprised you had to go to these lengths. But I'm glad you solved your problem. – Rob Sep 01 '14 at 21:13