This is a project based on this blog post that demonstrates how to create a module using only Swift.
I found the example a bit out of date (even though it's from 8/11/21) and was having some difficulty getting it to work. With some experimentation and web searching, I was able to come up with a example that works for both macOS and Linux (tested on Swift-5.7-DEV on Fedora 36).
Run this to build the module/library as well as build and run its accompanying test program (test.swift).
This is the file to really look at. It has all the magic incantations that are needed to properly build and run circa Swift 5.6 and 5.7-DEV (on Linux).
A Swift file that contains both a class and a function that are available to other programs
Test program that imports the ZLogger framework.