| 13 Aug 2025 |
 emily | anyway the mrustc-bootstrap compiler is useless | 19:23:33 |
| emily | because it gives you a Rust too old for Nixpkgs | 19:23:36 |
| emily | and no chain from there to the Rust we use | 19:23:42 |
| emily | so I am only marking it broken and giving pointers to how you could resurrect it in a comment | 19:23:53 |
| emily | actually maybe 17 too | 19:24:10 |
| emily | Cranelift or backporting LLVM 18 support patches to 1.74 or hoping mrustc adds support for new versions all seem like viable paths forward if you cared about it | 19:24:21 |
| emily | my suspicion is nobody does | 19:24:24 |
 Tristan Ross | In reply to @emilazy:matrix.org
12, 13, 14, 15, 16, 17 are all dying Excellent, I support that | 19:24:47 |
| emily | GCC 9, 10, 11, 12 too | 19:25:05 |
| Tristan Ross | 18, 19, 20, 21, and git should suffice | 19:25:10 |
| emily | I have every package that depends on any of those either dropped, marked broken, or fixed-in-principle locally | 19:25:14 |
| emily | just a lot of testing and fixups to do | 19:25:19 |
| Tristan Ross | Awesome, that GCC stuff will make it easier to move to GCC NG. | 19:25:41 |
| emily | LLVM 18 can probably go away for 26.05 depending on Zig ecosystem and stuff. LLVM 20 is probably imminently droppable if we ship 21 | 19:25:46 |
| emily | 19 might be droppable depending on how much stuff we need to pin after 21 | 19:25:53 |
| Tristan Ross | Zig should be getting 0.15 in a year | 19:26:08 |
| Tristan Ross | At least that's how I see it lol | 19:26:27 |
| emily | Ghostty uses a 0.13 which needs LLVM 18, e.g. | 19:26:34 |
| emily | * Ghostty uses 0.13 which needs LLVM 18, e.g. | 19:26:37 |
| Tristan Ross | Oh, surprised that uses 0.13 | 19:27:02 |
| emily | oh actually it's not because of damned CUDA | 19:27:05 |
| emily | but conceivably we could ship 26.05 with like 2–3 LLVM versions if we're lucky | 19:27:19 |
| emily | that would be nice | 19:27:22 |
| Tristan Ross | I agree and now that I'm back from DEF CON as of Monday night, I can start catching up on things. | 19:27:51 |
| emily | I am still testing LLVM 21 btw | 19:28:16 |
| emily | on Darwin | 19:28:20 |
| emily | it ran into some blockers | 19:28:23 |
| emily | I will get back to it but I diverted for a bit to remove all these compilers | 19:28:30 |
| Tristan Ross | Oh rip, I think there's a merge conflict on it or adjacent PR's. I can clean those up soon. | 19:28:55 |
 rosssmyth | Ok I tried it, and the fact that it is a lie is a lie. My guess is this is a change since the stage 1 stdlib rework. It currently fails while building compiler_builtins. | 19:29:32 |
