pocl: 7.0 -> 7.0-unstable-2025-09-30

[qbisi]

Update to unstable branch to support compiling with llvm21 and gcc15.

Things done

• Built on platform:
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• Tested, as applicable:
  • NixOS tests in nixos/tests.
  • Package tests at passthru.tests.
  • Tests in lib/tests or pkgs/test for functions and "core" functionality.
• Ran nixpkgs-review on this PR. See nixpkgs-review usage.
• Tested basic functionality of all binary files, usually in ./result/bin/.
• Nixpkgs Release Notes
  • Package update: when the change is major or breaking.
• NixOS Release Notes
  • Module addition: when adding a new NixOS module.
  • Module update: when the change is significant.
• Fits CONTRIBUTING.md, pkgs/README.md, maintainers/README.md and other READMEs.

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[qbisi]

nixpkgs-review result

Generated using nixpkgs-review-gha

Command: nixpkgs-review pr 448511
Commit: 052c9b91b39f2ff76a3b3bfe57f3e5d1d422ee9f (subsequent changes)
Merge: a20b33c0e94e557cf66dc0fbd68f126c68e81e7e

Logs: https://github.com/qbisi/nixpkgs-review-gha/actions/runs/18256304587

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x86_64-linux

✅ 9 packages built:

• pocl
• python312Packages.pyopencl
• python312Packages.pyopencl.dist
• python312Packages.reikna
• python312Packages.reikna.dist
• python313Packages.pyopencl
• python313Packages.pyopencl.dist
• python313Packages.reikna
• python313Packages.reikna.dist

---

aarch64-linux

✅ 9 packages built:

• pocl
• python312Packages.pyopencl
• python312Packages.pyopencl.dist
• python312Packages.reikna
• python312Packages.reikna.dist
• python313Packages.pyopencl
• python313Packages.pyopencl.dist
• python313Packages.reikna
• python313Packages.reikna.dist

---

x86_64-darwin (sandbox = true)

✅ 9 packages built:

• pocl
• python312Packages.pyopencl
• python312Packages.pyopencl.dist
• python312Packages.reikna
• python312Packages.reikna.dist
• python313Packages.pyopencl
• python313Packages.pyopencl.dist
• python313Packages.reikna
• python313Packages.reikna.dist

---

aarch64-darwin (sandbox = true)

✅ 9 packages built:

• pocl
• python312Packages.pyopencl
• python312Packages.pyopencl.dist
• python312Packages.reikna
• python312Packages.reikna.dist
• python313Packages.pyopencl
• python313Packages.pyopencl.dist
• python313Packages.reikna
• python313Packages.reikna.dist

[jansol]

7.1 should be dropping shortly, is there a reason to rush the package update with an unstable bump?

[qbisi]

recent staging-next has upgrade llvm to 21. pocl is broken now.

[jansol]

I think I'd prefer switching the llvmPackages input to default to LLVM 20 until the relevant release, since nixpkgs carries versioned llvm packages anyway. But then again LLVM is "fun" and carries its own breakage risks when doing that.

Ideally we'd also have a LLVM version check in the derivation that fails it already at evaluation time when trying to build against an unsupported LLVM version. But that's more of a long term thing.

[qbisi]

I think I'd prefer switching the llvmPackages input to default to LLVM 20

My first attempt was trying to replace llvmPackages with llvmPackages_20, pocl build fine. However downsteam pyopencl segfault when doing check with pocl.

[jansol]

https://github.com/pocl/pocl/releases/tag/v7.1 is out now