ARM32 and ARM64 Linux Support

[theofficialgman]

I have not tested your ARM32 and ARM64 Linux binaries for the new rust rewrite but after a review of the code I still see that the official manifest is used for those architectures. You need to keep in mind that the official manifest still does not contain ARM32/ARM64 linux native libraries so the game cannot run using the official manifest for these architectures.

See my old comment for details #62 (comment)

[mindstorm38]

I believe it's still possible to launch on arm by modifying the LWJGL version, but maybe we should fix this automatically?

[theofficialgman]

I'll say it again. On Linux there are no arm32/arm64 natives in any version of Minecraft. Macos has arm64 lwjgl3.3.3 on some of the newer Minecraft versions.

[mindstorm38]

Using the --lwjgl argument on portablemc is actually dynamically patching the versions of all lwjgl libraries in the version metadata. I've made it so it also adds every natives available for that version, so it allows running on Arm.

The thing I could improve right now is automatically doing this patch on systems that miss those natives.

[theofficialgman]

Natives from where? Keep in mind also that for 1.12 and lower lwjgl is not the only thing that needs native binaries and for newer Minecraft versions using the wrong lwjgl version will cause mod and game compatability/bugs.

[mindstorm38]

The code managing that patch is located here: https://github.com/mindstorm38/portablemc/blob/rust-rewrite/portablemc/src/moj/mod.rs#L1113-L1183

I'm directly putting the maven central links to official LWJGL builds, who are supporting Arm for all version after 3.2.3 my findings. However it's true that it's not really practical, we should be able to just rely on the launcher to decide which version is the correct one. Also, for older LWJGL (<=2.9.*) I don't have a solution for patching the client, and I guess that's what you are suggesting.

[mindstorm38]

I want the API to be capable, without asking it, to automatically fix LWJGL and to adjust various OpenGL variables depending on the OS, in order to launch Minecraft seamlessly.