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

13
votes

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?

4
xcode12

4 Answers

20
votes

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.

  1. Set "Build Active Architecture Only" to "YES" in target Build Settings tab;
  2. Set x86_64 for Simulator: enter image description here

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

1
votes

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

1
votes

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
0
votes
  1. Comment the pod files about Firebase (you may need to comment your program code also), pod file example:

enter image description here

  1. Quit Xcode
  2. pod install
  3. Restart Xcode and build the project
  4. Uncomment the pod files about Firebase
  5. Quit Xcode
  6. pod install again
  7. Restart Xcode and build the project