Just tried out the "SwiftToolsSupport-auto" and you have to make sure in all sub dependencies it is also added as "SwiftToolsSupport-auto" otherwise it will not work in sandboxed applications.
I tested this by adding one of my projects to xcode 12 project as a swift package dependency. This is because I want to use this on iOS too.
doozmen
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Last seen
User for
Post
Replies
Boosts
Views
Activity
Finaly figured out why this is. The public headers should not be in a folder named the same as the framework you are building. See https://stackoverflow.com/questions/27776497/include-of-non-modular-header-inside-framework-module/67869384#67869384
The reason behind this is not clear to me but renaming the folder fixed the issue. And then in the umbrella header make sure to only use imports <> and not the "" kind.
https://github.com/dooZdev/mixed-swift-objc-framework
It should work now as of xcode 14 beta3
Did you manage to find a solution?