b10299

ggml-org/llama.cppb10299Aug 7, 2026by github-actions[bot]

AI Summary

This release fixes a compilation error in the Metal backend where declaring arrays of matrix types in `threadgroup` memory was not supported. The fix uses a POD array and casting.

Key Highlights

Fixed compilation error in Metal kernel `kernel_lightning_indexer`.
Workaround for MSL limitation regarding matrix array initialization in `threadgroup` memory.
Uses POD array and casting instead of direct matrix array declaration.

Full Release Notes

<details open>

metal : avoid `threadgroup` matrix array instantiation in kernel_lightning_indexer (#26646)

- In MSL, declaring an array of matrix types like `threadgroup half4x4` causes
a 'no matching constructor' compilation error because MSL matrix types do not
have zero-argument default constructors and threadgroup variables cannot have
initializers.

- Fix this by declaring a POD `threadgroup half` array instead and casting
to `threadgroup half4x4 *` for matrix indexing.

Signed-off-by: JamePeng <jame_peng@sina.com>

</details>

**Website:**
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