Thanks
Finally got it to work :)
[1] GitHub - ljhm/Swift-C: Use C code from shared library in Swift
[2] System target library: How to use them? - #2 by taylorswift
[3] swift-package-manager/Usage.md at 263171977ebcd47f4aaca1202cff5a96c5158a64 · apple/swift-package-manager · GitHub