Oh wow it didn't even cross my mind that we would be affected by Apple switching to ARM. I assume ARM MacOS is something we will want to support natively at some point, but I don't know whether or not the best solution is to just wait for our CI providers to add support. You're also right that ideally we would support ARM64 on all three OSes, but that would double our testing burden even if all our CI providers supported that. I'm not sure what the best path forward is.
On Thu, Jul 9, 2020 at 11:30 AM Brion Vibber <[email protected]> wrote: > I've been a bit of an ARM64 enthusiast of late, trying out Linux, Windows > 10, and iOS devices that run on the ARM64/Aarch64 family of processors. > Emscripten works fine on these machines if one cares to do some light > development work on them, but since there's no binaries built from CI, the > standard emsdk can only install by building from source -- which can take > hours on a middleweight portable machine. > > Now that Apple is switching their Mac product line to ARM64 processors > over the next two years, it will likely become much more common next year > for people to have ARM64-based laptop and desktop computers, and some of > them will need to build something with emscripten in their workflows either > on macOS or on a virtualized Linux in Docker etc. > > From what I've seen presented at WWDC, the ARM64 Macs will support > emulated processes, so it may work to ship the x86_64 binaries with the > caveat that they will run much slower than native builds. > > Virtualized Linux builds would also need native ARM64 binaries to run, or > else they'd have to sit there for a couple hours compiling after every > upgrade. > > And of course there are already Windows 10 and Linux computers available > with ARM64 processes, on sale since a couple years ago and used in the wild > in modest numbers. > > I get the impression that the biggest roadblock to explicit ARM64 support > in emscripten is getting it into the CI infrastructure: > * Linux/ARM64 builds and testing? > * macOS/ARM64 builds and testing? > * Windows/ARM64 builds and testing? > > It's too soon to start on macOS since it's in beta, dev kits aren't > shipped yet, and there's no obvious way yet to figure out how to run tests > on a macOS ARM system in CI. :) > > And I'm less sure how important Win/ARM64 is, given you can use the > Linux/ARM64 version in WSL virtualization. But some folks prefer to develop > on native Windows, too. > > If there's any way we can start talking about Linux/ARM64 builds and > testing, I would be very happy about it! I would even kick in a few bucks > for a VM or something if that would help any. ;) > > Thanks for your time and your consideration! > > -- brion vibber (brion @ pobox.com / brion @ wikimedia.org) > Wikimedia Foundation > > -- > You received this message because you are subscribed to the Google Groups > "emscripten-discuss" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/emscripten-discuss/CAFnWYT%3D3OLskq1KBtVrgKsq1PTS7eHDxyzpcBpmE8_Bfk7m6Kw%40mail.gmail.com > <https://groups.google.com/d/msgid/emscripten-discuss/CAFnWYT%3D3OLskq1KBtVrgKsq1PTS7eHDxyzpcBpmE8_Bfk7m6Kw%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "emscripten-discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/emscripten-discuss/CAJZD_EVv%3DLHPDF4nZeOUX7ryEEAWvAPWRMPKwxX%3DbUh3JTFdnQ%40mail.gmail.com.
