i recently tried to download the Swift 2.x toolchains (for macos) that are listed as the earliest available ones on both swift.org and via swiftly and found that the download links appear to be broken. are these toolchains actually still available? i realize there is probably a weak argument for hosting them indefinitely, but it is cool to be able to use them to understand how the language has evolved.
We did not ship swift.org macOS toolchain for Release 2.2 and 2.2.1.
Linux (Ubuntu 14.04 and Ubuntu 15.10)
Swift 2.2 includes support for Swift on Linux. The Linux port is still relatively new and in this release does not include the Swift Core Libraries (which will appear in Swift 3). The port does, however, include LLDB and the REPL.