osl: fix build, 1.12.13.0 -> 1.12.14.0

[ShaddyDC]

Description of changes

Fixes #262633

Changelog is here

Fixed llvm version to 15 because it otherwise fails with an error that 16 is not supported.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 23.11 Release Notes (or backporting 23.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

Pinging maintainers @Hodapp87

[kirillrdy]

not going going to block this PR, is there an upstream issue/PR to track clang 16 support ?

[ShaddyDC]

I wasn't able to find one, but I could open one if that makes things simpler to track

[ShaddyDC]

Actually, not sure how I missed it, but there is this: AcademySoftwareFoundation/OpenShadingLanguage#1730
Unfortunately, applying the PR directly fails, but I guess it will be in one of the next releases.

[kirillrdy]

segfault on darwin. I assume it used to build on darwin because of optional depndency on libxml2

[ShaddyDC]

Hmm, I don't really know how they work or what they're supposed to do, but the binaries seem to work for me on linux with some test files from the repo, or at least they don't crash. I don't have a darwin system to test on, and the maintainer doesn't look to have been active in a while. Maybe @wegank who has added it can take a look?
Otherwise, I guess we could just disable that again so it works on linux at least.

[kirillrdy]

Hmm, I don't really know how they work or what they're supposed to do, but the binaries seem to work for me on linux with some test files from the repo, or at least they don't crash. I don't have a darwin system to test on, and the maintainer doesn't look to have been active in a while. Maybe @wegank who has added it can take a look?

lets wait at least a few more days, after that, we can just disable darwin

[wegank]

I'll push a fix.

[pbsds]

ZHF #265948
fixes https://hydra.nixos.org/build/241738313
fixes #262633
unblocks #260603

[pbsds]

Result of nixpkgs-review pr 268670 run on x86_64-linux 1

1 package built:

• osl

LGTM, thanks!

[github-actions]

Successfully created backport PR for release-23.11:

• [Backport release-23.11] osl: fix build, 1.12.13.0 -> 1.12.14.0 #270302