How to exclude XCFramework from Catalyst?

Question

Given that

There is an iOS app that needs Analytics and it's decided to use Amazon as a provider. So I added Amplify, and it works ok on iOS and on Simulator. But when building for Mac Catalyst, compiler produces a set of similar errors related to various XCFrameowrk's from Amplify bundle:

While building for Mac Catalyst, no library for this platform was found in '... artifacts/AWSiOSSDKV2/AWSCore.xcframework'.

Quick search shows that Amazon do not want to support Catalyst due to business reasons and there an open issue on this topic, and the first PR was raised 3 years ago then accidentally closed.

Attempts to avoid the error

Analytics isn't absolutely necessary feature, so I tried to remove Amplify libraries from Catalyst and keep them on iOS. I'm using this macro (which obviously is compile-time, not build-time, but some SO answers reported that it may help):

#if !TARGET_OS_MACCATALYST
import Amplify
import AWSPinpointAnalyticsPlugin
import AWSCognitoAuthPlugin
#endif

Then in Link Binary With Libraries I set Amplify-related libs to be Optional. In Filter section I removed checkmarks near Mac Catalyst, thinking that it will make them iOS-only:

All this tricks combined together didn't help and I'm still getting the same errors.

Q

How to exclude XCFramework for certain unsupported platforms?

P.S.

Seems, like a new AWS SDK, which claims to support Catalyst, is emerging. But it's raw and low level, and I simply not ready to debug it and build my own Analytis framework on top of it in scope of this question.

Answer 1

I didn't find the exact answer regarding Swift PM. But I was able to fix my issue, just switched to good old (and much more flexible) cocoapods. I used cocoapods-catalyst-support to restrict Amplify to iOS only. My podfile:

require 'cocoapods-catalyst-support'

platform :ios, '14.1'
use_frameworks!

target 'MyApp' do
  pod 'Amplify'
  pod 'AmplifyPlugins/AWSPinpointAnalyticsPlugin'
  pod 'AmplifyPlugins/AWSCognitoAuthPlugin'

  target 'MyAppTests' do
    inherit! :search_paths
    pod 'Amplify'
    pod 'AmplifyPlugins/AWSPinpointAnalyticsPlugin'
    pod 'AmplifyPlugins/AWSCognitoAuthPlugin'
  end
end

catalyst_configuration do
  ios 'Amplify'
  ios 'AmplifyPlugins/AWSPinpointAnalyticsPlugin'
  ios 'AmplifyPlugins/AWSCognitoAuthPlugin'
end

post_install do |installer|
  installer.configure_catalyst
end

I basically did the same thing, @PaulBeusterien recommended in comments, but the framework is generated by cocoapods instead of Firebase ReleaseTooling.

Swift Package Manager do not support platform filters, as for Feb 2022. I contacted swift forums and Amazon support and also did my own research.