I'm getting stuck retrofitting a framework I created that supports Carthage to also support Swift Package Manager. The problem is with a single helper method for catching NSExceptions that is written in Objective-C. All of the other files in the framework are written in Swift.
I have pulled the source files that provide that method and tried 1) adding the ObjC files as a separate target defined in the package (and a separate folder for its two source files), and 2) creating a completely separate package that the main package uses as a dependency.
In either case, once I get the package to build successfully in Xcode, I get error messages stating that the module does not exist, and Control-clicking on an import statement for the Objective-C dependency takes me to a blank screen. This leads me to believe that I have probably set up the Objective-C package incorrectly, but I have been having a very difficult time finding any documentation for how it should be set up.
I wonder if anybody in this forum can help me find some documentation, point me to a simple example of a mixed language SPM distribution, or otherwise suggest how to fix this problem.