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feat(windows-client): cross-compile + ship ARM64 (aarch64) off the x64 runner
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Browse Source 
windows.yml + windows-msix.yml gain an x86_64/aarch64 target matrix. ARM64 is
cross-compiled on the one x64 Windows runner — the x64 MSVC toolset ships the
ARM64 cross compiler, aarch64-pc-windows-msvc is tier-2 with host tools, and
SDL3/libopus (build-from-source) cross-compile cleanly. The only arch-specific
external dep is FFmpeg's import libs: the matrix points FFMPEG_DIR at a per-arch
tree (x64 C:\Users\Public\ffmpeg, arm64 C:\Users\Public\ffmpeg-arm64, both
FFmpeg 7.x / avcodec-61). Per-arch short CARGO_TARGET_DIR avoids a shared target
dir; fmt + test run only for x64 (aarch64 can't execute on the x64 host).

pack-msix.ps1 gains -Arch x64|arm64 (stamps the manifest ProcessorArchitecture,
arch-suffixes the .msix/.cer); windows-msix.yml matrixes both arches and
publishes ..._x64.msix / ..._arm64.msix. setup-windows-runner.ps1 provisions the
rustup target + the ARM64 FFmpeg tree (idempotent).

Verified live on the runner (home-windows-1): debug+release cross-build green,
clippy -D warnings green, and MSIX pack produces a valid arm64 package (manifest
arch=arm64; bundled exe/SDL3/avcodec/reactor-bootstrap all PE machine 0xAA64).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Enrico Bühler
2026-06-19 11:44:24 +00:00
parent aef552f04a
commit bd3f417d4b
8 changed files with 148 additions and 43 deletions
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docs/windows-client-bootstrap.md
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@@ -8,9 +8,10 @@ the gotchas. Read it top to bottom, then start at **Phase 1** (de-risk Reactor f
## Status — WinUI 3 client landed (2026-06-15)
The client is implemented in `clients/windows` (binary `punktfunk-client`) and is
**build + clippy + fmt green on `x86_64-pc-windows-msvc`** (built on the dev VM). It is the **WinUI 3**
client this doc planned: native chrome (host list, settings, in-app SPAKE2 PIN pairing) + the video on
a **`SwapChainPanel`**, all in pure Rust.
**build + clippy + fmt green on `x86_64-pc-windows-msvc` and `aarch64-pc-windows-msvc`** (the ARM64
target cross-compiled off the one x64 runner — see `windows.yml`; signed MSIX for both arches via
`windows-msix.yml`). It is the **WinUI 3** client this doc planned: native chrome (host list,
settings, in-app SPAKE2 PIN pairing) + the video on a **`SwapChainPanel`**, all in pure Rust.
- **Reactor is viable after all — it is what we use.** The locked decision held. windows-rs
[PR #4499](https://github.com/microsoft/windows-rs/pull/4499) (merged 2026-06-01) added a