add linux/aarch64 support.

[dskkato]

This PR adds configurations to create binary files for arm64 architecture, which are necessary for platforms like Raspberry Pi. The build process takes approximately 30-40 minutes due to the use of QEMU. Currently, I am testing the functionality using Raspberry Pi 4 and wgpu-py, and so far, it seems that the library loading is successful.

You can use the artifacts in the CD from the following link. Feel free to use it for testing as needed.

https://github.com/dskkato/wgpu-native/releases/tag/v0.18.1.3

Verified environments:

dskkato@raspberrypi:~ $ uname -m
aarch64
dskkato@raspberrypi:~ $ cat /etc/os-release 
PRETTY_NAME="Debian GNU/Linux 11 (bullseye)"
NAME="Debian GNU/Linux"
VERSION_ID="11"
VERSION="11 (bullseye)"
VERSION_CODENAME=bullseye
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

Related to #142

[rajveermalviya]

Nice, Thanks!

[almarklein]

Very nice! In #148 I did an earlier attempt using armv7-unknown-linux-gnueabihf as a compilation target. Do you know anything about what this difference means in practice? IIRC Raspberry Pi 3 required arm7, perhaps version 4 does not?

[dskkato]

@almarklein

I did an earlier attempt using armv7-unknown-linux-gnueabihf as a compilation target. Do you know anything about what this difference means in practice? IIRC Raspberry Pi 3 required arm7, perhaps version 4 does not?

Basically, "armv7" is for Raspberry Pi OS (32-bit), while "aarch64" is for Raspberry Pi OS (64-bit). The 64-bit OS for Raspberry Pi has been available for about two years and can be used with Raspberry Pi 3B models and newer.

https://www.raspberrypi.com/news/raspberry-pi-os-64-bit/

Since it is built for the aarch64 architecture, it may not run on 32-bit OS environments on the same hardware. I've added information about my verification results to the PR description.

I also attempted cross-compiling for armv7, but I decided to skip it this time because the latest manylinux only supports aarch64 (manylinux2014_armv7l seems to be the last one). While it is possible to build for armv7 by downloaing compilers from somewhere (ARM, linaro, ...) for cross-compile, the generalizability of the build results is quite uncertain in that case.

[almarklein]

Thanks a lot!

[dskkato]

Could we please have a release of the version after this patch was merged? I'd like to use it for validation in the Raspberry Pi environment.

[almarklein]

Could we please have a release of the version after this patch was merged?

I think we can backport this to the v0.18 branch and tag v0.18.1.3, what do you think @rajveermalviya ?

[rajveermalviya]

Created release tag: v0.18.1.2...v0.18.1.3