Could not find module 'BLTNBoard' for target 'x86_64-apple-ios-simulator'; found: arm64, arm64-apple-ios-simulator, at: .../Build/Products/Debug-iphonesimulator/BLTNBoard.swiftmodule

[neobeppe]

Problem Description:
BLTNBoard not building on simulator with M1 Mac

Steps to reproduce:
On M1 Mac try to build project importing BLTNBoard via SPM

Environment:

• Device: Simulator
• Version of BulletinBoard: 5.0.0

[ilkerc]

Thats not related with this repository. But here is an ultimate guide about that :)

I think you also use CocoaPods and some of your dependencies may exclude arm64 architectures or marks x86_64 as the only valid architecture on simulator.

EXCLUDED_ARCHS[sdk=iphonesimulator*] = arm64
or
VALID_ARCHS[sdk=iphonesimulator*] = x86_64

you can search your dependencies pod specs with: pod spec cat AppLovinSDK

or `pod spec cat TikTokOpenSDK`

If this is valid than xCode does compiles your dependencies with x86_64 arch (which forces your simulator to launch on top of rosetta2), in other words; you're running your simulator apps with rosetta2 support. Unfortunately you can't tell SPM which archs to exclude. You have two options here;

• Be sure that all your static cocoapods dependencies support for arm64-sim slices.
• just use cocoapods, it will exclude arm64 and compile with x86_64 support.