Unsupported compiler 'com.apple.compilers.llvm.clang.1_0' selected for architecture 'x86_64' on Xcode 7 Beta 2

Question

When I incorporated a popular OAuth2 library in iOS called OAuth2Client to my iOS app which is developed on Xcode 7 Beta 2 and then tried running the simulator, the following error occurred and the simulator didn't launch.

Unsupported compiler 'com.apple.compilers.llvm.clang.1_0' selected for architecture 'x86_64'

What does this error mean? A lot of warnings (yellow triangle) followed with the error above (red octagon), such as:

warning: no rule to process file '/Users/myUsername/myAppname/Pods/NXOAuth2Client/Sources/NSData+NXOAuth2.m' of type sourcecode.c.objc for architecture x86_64

How can I deal with the these errors and run the simulator properly? Or does CocoaPods only work on environments prior to Xcode 7 Beta?

UPDATE

Later I found that this occurs on any projects I create, not only on a project using CocoaPods. The only clue that occurs to me is that when I updated my iTunes to 12.2 today and then launched my Xcode, the dialog popped up, instructing to install new command-line tools.

UPDATE 2

I just upgrade to Xcode 7 Beta 3 but the error still got me annoyed...

Scalenus

Answer 1

I met the same issue on Xcode 7 beta 4. I have tried to clean the project for several times but with no lucky. Unbelievably, restart Xcode saved my night. You can try this.

Rakia

Just got this on Xcode 7.1 b2 - I wiped the Derived Data folder, tried to recompile, same error. Shut down Xcode, restarted it, error now gone! – Runyan

Forgive me I overlooked your answer, but restarting Xcode is surely what I tried but it didn't resolve the issue. Just note that I already moved to GM and have no problems now. Thanks for your answer though. – Scalenus

Answer 2

Solution 1

Close Xcode, open terminal, before anything else, type: “defaults delete com.apple.dt.Xcode” (this addresses your Xcode settings) open Xcode and your project should work normally.

Plan B

If that doesn't work try this to clear out your cache. Save your files then put this in your terminal:
rm -rf Library/Caches/com.apple.dt.Xcode/

Potential causes

This bug can occur if you declared your pods with single quotes instead of double quotes or for some reason your pod files become corrupted (i.e.: working with p.lists, Google's p.list, firebase etc). I think what triggers the bug to break your code is during certain recompiling phases, for example: opening after unzipping the project, or opening the project after pulling it from GitHub.

Kowtko

Answer 3

With the version (X-code 8 beta 2) I got the following error, because I tried to run it out of the downloads folder:

Unsupported compiler 'com.apple.compilers.llvm.clang.1_0' selected for architecture 'x86_64'

It helped to put it in the normal Program Folder!

Electrocautery

Answer 4

Angel's answer worked for me as well. I too experienced this with 8b2, Moving the app to the Program folder instead running out of Downloads resolved it for me.

Defeasible

Welcome to StackOverflow! "Answers" like this should be posted in the comments section due to them not actually being a solution to this question. – Humphreys

Yes i agree, but i do not have 15 reputation yet and was not able to post a comment. But i still wanted to share my response as it is helpful to the question. – Defeasible

Answer 5

Just use the option of "build for running" this solved my error. I'm using Xcode 8.3 beta_2 on Mac OS Sierra 10.12.3

Uproot

Answer 6

In my case with XCode 9.0.1, I noticed that even after closing XCode, I had stuck processes running from an earlier version of XCode running:

$ ps aux | grep Xcode

dyoung           83871   0.0  0.0  2547420    708 s000  S    Tue11PM   0:00.19 /Applications/Xcode.app/Contents/SharedFrameworks/DVTInstrumentsFoundation.framework/Resources/DTServiceHub
dyoung           28009   0.0  0.0  2432804    796 s012  S+   10:24AM   0:00.00 grep Xcode
dyoung           27996   0.0  0.3  2869796  46088   ??  S    10:23AM   0:00.65 /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Library/Xcode/Overlays/Interface Builder Cocoa Touch Tool --hostToRemoteFIFO /var/folders/k6/80v30vf13kdc8qd2rjtq35640000gn/T/ibtoold-27980/IB/BF1AA7D2-8B3F-4157-A447-6D700B84C105.HostToRemote --remoteToHostFIFO /var/folders/k6/80v30vf13kdc8qd2rjtq35640000gn/T/ibtoold-27980/IB/BF1AA7D2-8B3F-4157-A447-6D700B84C105.RemoteToHost
dyoung           27995   0.0  0.3  2869796  46060   ??  S    10:23AM   0:00.60 /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Library/Xcode/Overlays/Interface Builder Cocoa Touch Tool --hostToRemoteFIFO /var/folders/k6/80v30vf13kdc8qd2rjtq35640000gn/T/ibtoold-27982/IB/2DC08948-3951-4E09-BBC0-CC4C27712A9C.HostToRemote --remoteToHostFIFO /var/folders/k6/80v30vf13kdc8qd2rjtq35640000gn/T/ibtoold-27982/IB/2DC08948-3951-4E09-BBC0-CC4C27712A9C.RemoteToHost
dyoung           27994   0.0  0.3  2869796  46076   ??  S    10:23AM   0:00.62 /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Library/Xcode/Overlays/Interface Builder Cocoa Touch Tool --hostToRemoteFIFO /var/folders/k6/80v30vf13kdc8qd2rjtq35640000gn/T/ibtoold-27981/IB/DB22227E-FBD5-46B9-B90D-FF440135ABEC.HostToRemote --remoteToHostFIFO /var/folders/k6/80v30vf13kdc8qd2rjtq35640000gn/T/ibtoold-27981/IB/DB22227E-FBD5-46B9-B90D-FF440135ABEC.RemoteToHost
dyoung           27982   0.0  0.5  3830728  84644   ??  Ss   10:23AM   0:01.22 /Applications/Xcode.app/Contents/Developer/usr/bin/ibtoold --sending-client-environment
dyoung           27981   0.0  0.5  3829860  84672   ??  Ss   10:23AM   0:01.20 /Applications/Xcode.app/Contents/Developer/usr/bin/ibtoold --sending-client-environment
dyoung           27980   0.0  0.6  3842552  94472   ??  Ss   10:23AM   0:01.67 /Applications/Xcode.app/Contents/Developer/usr/bin/ibtoold --sending-client-environment

One I manually killed all these processes then restarted XCode my compiler error magically went away.

Corked