Problems after upgrading to Xcode 12:ld: building for iOS Simulator, but linking in dylib built for iOS, architecture arm64

Question

I upgraded Xcode to Xcode 12, and build my project. Firstly, it come out an error such as below:

ld: building for iOS Simulator, but linking in dylib built for iOS, file '/Users/ethanli/Documents/Aspira/RA.com4iOS/RA.com4iOS/source/ReserveAmerica/ReserveAmerica4/External/Mapbox/MapboxMobileEvents.framework/MapboxMobileEvents' for architecture arm64

I wiped out this error by adding "arm64" to Excluded Architecture in Build Settings. Refer to https://developer.apple.com/forums/thread/656509

configuration like this

But... another error came out:

error: Build input file cannot be found: '/Users/ethanli/Library/Developer/Xcode/DerivedData/ReserveAmerica4-cgnruuknmgycgrbadguodtkwspmy/Build/Products/DEBUG-iphonesimulator/ReserveAmerica4.app/ReserveAmerica4' (in target 'ReserveAmerica4' from project 'ReserveAmerica4')

I went to the path in Finder, “ReserveAmerica4” really doesn't exist.

Is there any way to solve this problem?

score 24 · Answer 1 · answered Sep 27 '20 at 02:11

24

I resolved this error.

The root reason is that Xcode 12 does not allow build arm64 architecture for Simulator. We should set x86_64 for Simulator building.

Set "Build Active Architecture Only" to "YES" in target Build Settings tab;
Set x86_64 for Simulator:

For more answers: Xcode 12, building for iOS Simulator, but linking in object file built for iOS, for architecture arm64

answered Sep 27 '20 at 02:11

Ethan Li

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Thank you Ethan! I've been trying to figure this out for many days now – Craig1123 Sep 28 '20 at 16:42
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This seems to work for the simulators. When I try to do an archive build for any iOS device, I'm still getting the same error :( – Craig1123 Sep 29 '20 at 00:25
@Craig1123 This error is about architecture, you can show your error to me. – Ethan Li Sep 29 '20 at 05:31
I made a new post with my error - https://stackoverflow.com/questions/64123206/xcode-12-problems-build-input-file-cannot-be-found-building-for-release-on – Craig1123 Sep 29 '20 at 15:53
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Those who are using xcode 12, this answer is life saver. – Torongo Mar 18 '21 at 12:11
It also works in Xcode 13 Beta 4. Thank you! – Den Aug 05 '21 at 06:46

score 12 · Answer 2 · answered Aug 06 '21 at 12:11

12

You can fix it in flutter with this

post_install do |installer|
  installer.pods_project.build_configurations.each do |config|
    config.build_settings["EXCLUDED_ARCHS[sdk=iphonesimulator*]"] = "arm64"
  end
end

answered Aug 06 '21 at 12:11

gtr Developer

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Great answer! This solved the problem in my Flutter project! – Alexey Sep 07 '21 at 05:12
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solve architecture problem, but cause another problem 'module xxx not found'. apple m1, xcode 13.1, flutter 2.5.3. – David Dec 09 '21 at 15:29
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I will answer how to fix module not found error also :) – gtr Developer Dec 09 '21 at 17:21

Oleksandr B · Answer 3 · 2022-02-15T00:02:57.813

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I got same error at M1 Silicon. But adding arm64 to Excluded + Build Active Architecture Only did not help because one library failed with: For builds to run in the simulator, this should be set to "x64" error.

Temporary solution that worked for me:

in Finder right click on Xcode app;
select Get Info;
set checkmark Open using Rosetta;
reopen Xcode / clean / rebuild;

edited Feb 15 '22 at 00:02

answered Feb 14 '22 at 17:23

Oleksandr B

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score 2 · Answer 4 · edited Aug 09 '21 at 18:03

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Comment the pod files about Firebase (you may need to comment your program code also), pod file example:

Quit Xcode
pod install
Restart Xcode and build the project
Uncomment the pod files about Firebase
Quit Xcode
pod install again
Restart Xcode and build the project

edited Aug 09 '21 at 18:03

Ole Pannier

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answered Aug 03 '21 at 14:20

wai

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Tried to both update the pod and delete and reinstall pod, but nothing worked. But this workaround worked perfectly thank you! – Peter Dec 09 '21 at 15:37

score 1 · Answer 5 · answered Apr 02 '21 at 14:47

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After doing a lot of things like installing pods, I cloned the project again deleting the previous one, it worked for me.

answered Apr 02 '21 at 14:47

WAQAS YOUNAS

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Problems after upgrading to Xcode 12:ld: building for iOS Simulator, but linking in dylib built for iOS, architecture arm64

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