This is a CommonCrypto SPM (Swift Package Manager) Package that allows for linking to CommonCrypto. It contains a modulemap file and CommonCrypto headers. The latter is because the headers are not available in a general path – instead they are part of the Xcode bundle and thus not very portable.
let package = Package(
name: "YourPackage",
dependencies: [
.package(url: "https://github.com/jernejstrasner/CCommonCrypto.git", .branch("master"))
],
targets: [...]
)