aarch64-linux-gnu support

[pfgithub]

Reproduction: On an aarch64-linux-gnu machine, clone zig-gamedev and run zig build gui_test_wgpu, or on another machine run zig build gui_test_wgpu -Dtarget=aarch64-linux-gnu

Some of the errors, when building for native target (zig build gui_test_wgpu)

error: ld.lld: /home/pfg/.cache/zig/p/12205cd13f6849f94ef7688ee88c6b74c7918a5dfb514f8a403fcc2929a0aa342627/libdawn.a(/home/runner/work/mach-gpu-dawn/mach-gpu-dawn/zig-cache/o/2d07bc639da54e61162c5dc2347f6982/type.o) is incompatible with elf64-littleaarch64
error: ld.lld: /home/pfg/.cache/zig/p/12205cd13f6849f94ef7688ee88c6b74c7918a5dfb514f8a403fcc2929a0aa342627/libdawn.a(/home/runner/work/mach-gpu-dawn/mach-gpu-dawn/zig-cache/o/20e302dae5f2729b63bc579233d31fa8/module.o) is incompatible with elf64-littleaarch64
error: ld.lld: /home/pfg/.cache/zig/p/12205cd13f6849f94ef7688ee88c6b74c7918a5dfb514f8a403fcc2929a0aa342627/libdawn.a(/home/runner/work/mach-gpu-dawn/mach-gpu-dawn/zig-cache/o/2d5bacf236a8502b4c441fa76bfac557/continue_statement.o) is incompatible with elf64-littleaarch64
error: ld.lld: /home/pfg/.cache/zig/p/12205cd13f6849f94ef7688ee88c6b74c7918a5dfb514f8a403fcc2929a0aa342627/libdawn.a(/home/runner/work/mach-gpu-dawn/mach-gpu-dawn/zig-cache/o/47c67c6aa3786116782278ad96ad4b77/internal_attribute.o) is incompatible with elf64-littleaarch64
error: ld.lld: /home/pfg/.cache/zig/p/12205cd13f6849f94ef7688ee88c6b74c7918a5dfb514f8a403fcc2929a0aa342627/libdawn.a(/home/runner/work/mach-gpu-dawn/mach-gpu-dawn/zig-cache/o/3206bf80fd358e6a292573d552b1bdf3/stride_attribute.o) is incompatible with elf64-littleaarch64

Alternatively, when building with zig build gui_test_wgpu -Dtarget=aarch64-linux-gnu

error: ld.lld: /home/pfg/.cache/zig/p/12205cd13f6849f94ef7688ee88c6b74c7918a5dfb514f8a403fcc2929a0aa342627/libdawn.a(/home/runner/work/mach-gpu-dawn/mach-gpu-dawn/zig-cache/o/85a75da374a17c316c0107677988e869/function.o) is incompatible with aarch64linux
error: ld.lld: /home/pfg/.cache/zig/p/12205cd13f6849f94ef7688ee88c6b74c7918a5dfb514f8a403fcc2929a0aa342627/libdawn.a(/home/runner/work/mach-gpu-dawn/mach-gpu-dawn/zig-cache/o/b782c2827f06e615d50a04e6726ad61d/builder.o) is incompatible with aarch64linux
error: ld.lld: /home/pfg/.cache/zig/p/12205cd13f6849f94ef7688ee88c6b74c7918a5dfb514f8a403fcc2929a0aa342627/libdawn.a(/home/runner/work/mach-gpu-dawn/mach-gpu-dawn/zig-cache/o/d527fbc0ba85ef0fc63d8a5161708253/instruction.o) is incompatible with aarch64linux
error: ld.lld: /home/pfg/.cache/zig/p/12205cd13f6849f94ef7688ee88c6b74c7918a5dfb514f8a403fcc2929a0aa342627/libdawn.a(/home/runner/work/mach-gpu-dawn/mach-gpu-dawn/zig-cache/o/637cacb19b9660adcb609478241f70eb/operand.o) is incompatible with aarch64linux
error: ld.lld: /home/pfg/.cache/zig/p/12205cd13f6849f94ef7688ee88c6b74c7918a5dfb514f8a403fcc2929a0aa342627/libdawn.a(/home/runner/work/mach-gpu-dawn/mach-gpu-dawn/zig-cache/o/9fdc09b4cce8852c606ee506104c1725/binary_writer.o) is incompatible with aarch64linux
error: ld.lld: /home/pfg/.cache/zig/p/12205cd13f6849f94ef7688ee88c6b74c7918a5dfb514f8a403fcc2929a0aa342627/libdawn.a(/home/runner/work/mach-gpu-dawn/mach-gpu-dawn/zig-cache/o/1483fa6b2cd74427a8f7951e0d9dc136/token.o) is incompatible with aarch64linux
error: ld.lld: /home/pfg/.cache/zig/p/12205cd13f6849f94ef7688ee88c6b74c7918a5dfb514f8a403fcc2929a0aa342627/libdawn.a(/home/runner/work/mach-gpu-dawn/mach-gpu-dawn/zig-cache/o/93ed71fb4868dcd884ee3af03b386526/classify_template_args.o) is incompatible with aarch64linux

I'm not sure what target the archive was built for, but it doesn't seem to be aarch64-linux-gnu

[hazeycode]

Sorry but we do not currently support linux on aarch64.

[pfgithub]

Why does https://github.com/michal-z/webgpu_dawn-aarch64-linux-gnu exist but contain libdawn.a full of x86_64 .o files?

...
vertex_pulling.o:                            ELF 64-bit LSB relocatable, x86-64, version 1 (SYSV), not stripped
VertexFormat.o:                              ELF 64-bit LSB relocatable, x86-64, version 1 (SYSV), not stripped
void.o:                                      ELF 64-bit LSB relocatable, x86-64, version 1 (SYSV), not stripped
VulkanBackend.o:                             ELF 64-bit LSB relocatable, x86-64, version 1 (SYSV), not stripped
VulkanError.o:                               ELF 64-bit LSB relocatable, x86-64, version 1 (SYSV), not stripped
VulkanExtensions.o:                          ELF 64-bit LSB relocatable, x86-64, version 1 (SYSV), not stripped
VulkanFunctions.o:                           ELF 64-bit LSB relocatable, x86-64, version 1 (SYSV), not stripped
VulkanInfo.o:                                ELF 64-bit LSB relocatable, x86-64, version 1 (SYSV), not stripped
waiter.o:                                    ELF 64-bit LSB relocatable, x86-64, version 1 (SYSV), not stripped

[hazeycode]

I guess it was a mistake. I don't think anyone has actually used it.

I completely overlooked what looks like some effort to support aarch64_linux_gnu. Maybe it will just work if we compile a binary for aarch64 and put it there.