Solvedreact native onesignal OneSignal OneSignalNotificationExtension build fail on Xcode 12 related to cocoapods / architecture / simulator issues

Description:

Just updated from Xcode 10 to Xcode 12, before on v10 this project built and run successful.

OneSignalNotificationExtension target build fail:

Undefined symbol: _swift_getObjCClassMetadata

Undefined symbol: type metadata accessor for Foundation.UUID

Undefined symbol: Swift._bridgeAnythingToObjectiveC<A>(A) -> Swift.AnyObject

Undefined symbol: protocol descriptor for Swift.ExpressibleByFloatLiteral

Undefined symbol: associated conformance descriptor for Swift.ExpressibleByFloatLiteral.Swift.ExpressibleByFloatLiteral.FloatLiteralType: Swift._ExpressibleByBuiltinFloatLiteral

Undefined symbol: associated type descriptor for Swift.ExpressibleByFloatLiteral.FloatLiteralType

Undefined symbol: protocol descriptor for Swift.ExpressibleByIntegerLiteral

Undefined symbol: associated type descriptor for Swift.ExpressibleByIntegerLiteral.IntegerLiteralType

Undefined symbol: method descriptor for Swift.ExpressibleByIntegerLiteral.init(integerLiteral: A.IntegerLiteralType) -> A

Undefined symbol: static Foundation.UUID._unconditionallyBridgeFromObjectiveC(__C.NSUUID?) -> Foundation.UUID

Undefined symbol: value witness table for Builtin.Int32

Undefined symbol: protocol witness table for Swift.Int : Swift._ExpressibleByBuiltinIntegerLiteral in Swift

and 100 errors more

I'm not so good on Xcode and Mac so I'm sorry if it's no clear or misleading.

Thank you

Environment

react-native 0.63.2
onesignal-react-native 3.9.1
Xcode 12
Installed via npm and linked with pods

Steps to Reproduce Issue:

1. Build

I’m having some issues too with Xcode 12

I can successfully build the project on Xcode 11. However as soon as I open the Xcode12 and build the project I get the following error:

▸ Linking OneSignalNotificationServiceExtension

❌  clang: error: no such file or directory: '/Users/carloscuesta/project-folder/ios/build/project/Build/Products/Debug-iphonesimulator/libRCTOneSignal.a'

This doesn’t seems an error from OneSignal side. Looks like there’s something weird with cache or something like that,
things I tried:

• Delete Xcode Derived Data - rm -rf ~/Library/Developer/Xcode/DerivedData/
• Clear react-native, yarn cache and reinstall dependencies.
• Reset simulator data and contents
• Restarted the computer

I don't know what else I should try, I would say that everything is linked properly since the application is working good on Production and the build works with Xcode 11.

I have the library linked manually using the OneSignal guide, any idea on how to fix this ? 🙏🏼

Typically when I got this issue it was solved by cleaning the DerivedData but I can't get rid of the error 😞

i am using react-native-onesignal 3.9.1 on react native 0.60.0 version...I am able to resolve this issue by including x86_64 inside User-Defined settings (VALID_ARCHS)

I've discovered something weird,

If I try to build the application with Xcode 12, it always fails. However If I build the application first with Xcode 11 and then open up Xcode 12 and build the app it works 🤯

However as soon as I clean build and try to rebuild again with Xcode 12 it starts to fail with the same error again 😖

Same error here with with Xcode 12 and onesignal-react-native 3.9.1 :-(
Projects were working before the update.