Warning about Alamofire not being safe for Application Extensions

[mac-cain13]

When using the Promissum/Alamofire subspec you'll get the following warning:

ld: warning: linking against a dylib which is not safe for use in application extensions: /Users/[yada-yada]-iphonesimulator/Alamofire/Alamofire.framework/Alamofire

This is because Alamofire declares NOT to be safe for use in application extensions, while Promissum declares it is:

Promissum/Promissum.podspec

Line 20 in 9343949

s.pod_target_xcconfig = { 'APPLICATION_EXTENSION_API_ONLY' => 'YES' }

[mac-cain13]

Tried 3 options:

1. ❌ Move the pod_target_xcconfig into the subspec declarations and override, but this results in an error when running pod install: [!] Can't merge pod_target_xcconfig for pod targets: ["Alamofire", "Core", "UIKit"]. Singular build setting APPLICATION_EXTENSION_API_ONLY has different values.

2. ✅ Put the pod_target_xcconfig in it's own subspec, this works as expected, but requires the user to do something.

3. ✅ While testing this I noticed that if the app/extension target the pod is for requires APPLICATION_EXTENSION_API_ONLY then this will be applied to the Pods also. So I think that we can just remove the pod_target_xcconfig line from the podspec.