static-dxc Doesn't Support aarch64

[tronical]

Description

Compling for Windows ARM (aarch64-windows-msvc) doesn't work.

Repro steps

cargo build in the wgpu repo reproduces this easily.

Expected vs observed behavior

error: failed to run custom build command for `mach-dxcompiler-rs v0.1.4+2024.11.22-df583a3.1`

Caused by:
  process didn't exit successfully: `C:\dev\wgpu\target\debug\build\mach-dxcompiler-rs-e93f55e2962306f4\build-script-build` (exit code: 101)
  --- stdout
  cargo:rerun-if-changed=msvc_version.c
  cargo:rerun-if-changed=mach_dxc.h

  --- stderr
  thread 'main' panicked at c:\cargo_home\registry\src\index.crates.io-6f17d22bba15001f\mach-dxcompiler-rs-0.1.4+2024.11.22-df583a3.1\build.rs:119:9:
  Unsupported target: aarch64-windows-msvc
  Check supported targets on https://github.com/DouglasDwyer/mach-dxcompiler/releases
  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
warning: build failed, waiting for other jobs to finish...

Platform

Windows-ARM

[cwfitzgerald]

Gah should probably add this to ci.

[cwfitzgerald]

@DouglasDwyer is aarch64 windows support possible? Otherwise we can prevent static-dxc from being available on aarch64.

[DouglasDwyer]

@DouglasDwyer is aarch64 windows support possible? Otherwise we can prevent static-dxc from being available on aarch64.

When I try to build the mach-dxcompiler project for aarch64, I get a bunch of link errors: error: lld-link: libucrtd.lib(exit.obj): machine type x64 conflicts with arm64. It seems that Zig's build system is trying to link the x86 C runtime libraries with the Arm binary. Unfortunately, I don't know enough about cross-compiling for Arm on Windows right now - and GitHub CI does not support aarch64 Windows runners so I can't use one to build the binary natively. As such, I don't plan to work on aarch64 Windows support in the near future - sorry. As an alternative, the aarch64-windows-gnu target is supported.

[cwfitzgerald]

Alright, we'll fix this on our side