Cocoapods: Unable to debug the simulator in the xcode12

[CLANNADAIR]

• [ ] I've read and understood the CONTRIBUTING guidelines and have done my best effort to follow.

Report

What did you do?

Run pod install，Run the project on the simulator。

What did you expect to happen?

Run successfully。

What happened instead?

Run failed。
Prompt that the third-party library cannot be found。
Or prompt:

The linked library 'libPods-PushNotificationService.a' is missing one or more architectures required by this target: arm64.

But if there is no problem without using the simulator, you can run the project normally.

CocoaPods Environment

CocoaPods : 1.10.0.rc.1
Ruby: 2.6.3p62 (2019-04-16 revision 67580)
RubyGems:3.0.3
Host:Mac OS X 10.15.6 (19G2021)
Xcode: 12.0 (12A7209)
Ruby lib dir : /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/libGit:git version 2.24.3 (Apple Git-128)
Repositories : https://gems.ruby-china.com/

Project that demonstrates the issue

ℹ Please link to a project we can download that reproduces the issue.
You can delete this section if your issue is unrelated to build problems,
i.e. it's only an issue with CocoaPods the tool.

[iOSleep]

same issue, seems should set EXCLUDED_ARCHS in *.xcconfig

[CLANNADAIR]

same issue, seems should set EXCLUDED_ARCHS in *.xcconfig

Could you give me a more detailed answer, please.

[iOSleep]

same issue, seems should set EXCLUDED_ARCHS in *.xcconfig

Could you give me a more detailed answer, please.

have a try, in your *.xcodeproj -> Build Settings -> User-Defined delete the VALID_ARCHS

[ball-hayden]

We're seeing the same thing, but don't have VALID_ARCHS defined in build settings anywhere

[oselvi]

i have the same issue and don't have VALID_ARCHS defined in User-Defined

[ball-hayden]

We've managed to ~solve~ work around the problem with some inspiration from https://github.com/CocoaPods/CocoaPods/issues/10065#issuecomment-694266259.

We've set our iOS Deployment Target to 14, and then the following for our main project:

[SmartHbdev]

I have found the problem. Xcode 12 don't want VALID_ARCHS and in some of my project i can't clear completely this line.
When you look at your taget build settings (search for archs) and display every levels, you can see in the Config.File column every arch you can't remove directly.
We must go in the file located in the Pods/Targets Support Files/ Pods-(projectname)/Pods...xcconfig. Both in debug and release when you look at the very bottom there is a line with VALID_ARCHS. Remove it and problem resolved :)

[huangrun]

I tried to delete the VALID_ARCHS,but got another error about permission，finally my effective solution is “Xcode12-Targets-Build Settings-VALID_ARCHS add x86_64”

[CLANNADAIR]

Thank you for your answers, I have solved the problem.I temporarily addedVALID_ARCHS to x86_64, and it ran successfully.