| 16 May 2025 |
 Tristan Ross | NixOS 25.05 has branched off, if we're ready to bump LLVM then we can undraft https://github.com/NixOS/nixpkgs/pull/407738.
CC Randy Eckenrode emily
| 21:56:46 |
 emily | we should make sure Mesa + Firefox build on Linux, and both Darwin stdenvs bootstrap successfully | 21:58:39 |
| emily | other than that it should be good to go I think. should probably also bump Rust's LLVM | 21:58:49 |
| emily | (and commit message should be llvmPackages: llvmPackages_19 -> llvmPackages_20 according to conventions) | 21:59:02 |
| emily | also needs a release note :) | 21:59:08 |
| Tristan Ross | Will do, I'll build outside of staging since I don't want to waste compute heh. I'll check some pkgsLLVM things to see if they still work. | 21:59:55 |
| emily | it'll be a full rebuild for Darwin anyway | 22:00:16 |
| Tristan Ross | I was meaning for Linux since I don't touch Darwin lol | 22:00:44 |
 Randy Eckenrode | In reply to @emilazy:matrix.org
we should make sure Mesa + Firefox build on Linux, and both Darwin stdenvs bootstrap successfully My Swift branch is on LLVM 20 (because it’s required). I didn’t have a problem building the stdenv on aarch64-darwin. | 22:01:38 |
| Tristan Ross | Seems like we need to bump spirv stuff for Firefox. Will do it in the PR. | 22:06:13 |
| emily | would make sense to bump Rust at the same time since Firefox also tests LLVM on Linux quite a lot through that | 22:06:51 |
| Tristan Ross | Alright, I might add a section to pkgs/development/compilers/llvm/README.md to document what's needed when bumping LLVM treewide since it seems there's quite a bit of stuff. | 22:11:57 |
| emily | FWIW, rustc.passthru.tests covers all the Linux stuff | 22:12:52 |
| emily | so Darwin stdenv + that + pkgsLLVM.hello should be sufficient if Rust is bumped | 22:13:11 |
| emily | I forget if we're expecting any major breaking changes from 20 | 22:13:31 |
| emily | for 19 we did quite a lot of prep because a ton of things broke https://github.com/NixOS/nixpkgs/pull/354107 | 22:13:41 |
| Tristan Ross | Yeah, I'm thinking we could do a NixOS test in pkgsLLVM once we have it more workable | 22:13:45 |
