Hi, On Sat, 28 Jan 2023, Chris Hanson wrote:
That said, any compiler or linker for 68K needs to support multiple ABI standards since Mac OS, Atari, Amiga, and all the different UNIX and UNIX-like operating systems had their own ABI. Fortunately LLVM itself supports the concept of multiple ABIs…
Indeed, but the systems you mention A., use a mixure of ABIs, I mean one system with many ABIs, even if there are some "basic assumptions" about volatile/nonvolatile registers and so on, but otherwise "you're on your own", and B., neither of these have "threads" as such, let alone anything that resembles the concept of a Thread Local Storage in the modern sense. Point is: it's safe to start on Linux/NetBSD, because there the OS at least knows about these as a concept, so there's some framework for it to follow as guard rails. Elsewhere - prepare for a lot of faking, and hacking, and cheating. :) (Ask me where I know... ;) ) Charlie
