Offer builds for aarch64

[CoenWarmer]

Noticed on buildbot.libretro.com there are precompiled cores for armhf and arm7-neon-hf for nightly.

Would it be possible to also offer precompiled builds for aarch64 so Orange Pi users could get started quickly using retroarch?

Noticed stable does not have arm builds so unsure if there is a reason to not have aarch64. Appreciate the work!

[hizzlekizzle]

Unfortunately, our automated build infrastructure doesn't have any ARM runners (aside from MacOS), so we aren't able to build native binaries for those architectures. The existing ones are super-old and are just leftovers from our previous setup.

Another complication is that most SBCs require esoteric build flags, making a one-size-fits-all approach less than successful. That said, I do some builds via github actions at https://github.com/hunterk/libretro_builds, and this repo has even more: https://github.com/christianhaitian/retroarch-cores

Since these are unofficial sources, we can't distribute them from the online updater (security and all), but they're better than nothing.

[CoenWarmer]

Ok, understandable.

I just compiled the latest from main on my Orange Pi 5. Mega drive and SNES seems to be working great. Will try to get the compiled versions on a repo (if I find the time might even see if I can leverage my device to run builds).

Thanks!