| 29 May 2021 |
 Roos | That's not necessarily a good thing xD | 16:08:50 |
 Las | cabal build on aarch64 for me gives me an ghc: could not execute: opt error, even though I have it in my PATH. Does anyone know how to fix this? | 16:10:45 |
 maralorn | Las: On nixos-unstable? | 16:13:25 |
| Las | Yeah | 16:13:31 |
| Las | It's from the 7th of May | 16:14:02 |
| Las | maralorn | 16:19:17 |
| maralorn | I see. We have quite recently merged a fix for aarch64/llvm and the ghc withPackages wrapper. But I have no clue it applies to your situation. sterni (he/him) might know more. | 16:29:31 |
| Las | Thanks, I'll try updating my nixpkgs! | 16:31:59 |
 sterni (he/him) | Las: macOS? | 16:32:27 |
| Las | No, Linux of course | 16:32:35 |
| Las | I think I'm one of the very few people using an aarch64 machine as my main machine | 16:33:00 |
| Las | * I think I'm one of the very few people using an aarch64-linux machine as my main machine | 16:33:04 |
| sterni (he/him) | depending on how your environment is set up, ghc should know how to find the LLVM stuff by default now | 16:33:59 |
| sterni (he/him) | not sure if we have fixed it everywhere | 16:34:16 |
| sterni (he/him) | Las: try updating nixos-unstable and if it still doesn't work, please open an issue on github, describe how you set up your environment and ping @NixOS/haskell. I'll try to fix this, I can't really test stuff on aarch64 though so there's always a bit of guesswork involved | 16:36:00 |
| Las | Thanks. | 16:36:11 |
 pennae | maybe we should try to reinstall our pinebook and give aarch64 haskell another try
last we tried it was a bit of a massive pain in the tail | 16:37:51 |
| sterni (he/him) | there should be quite substantial binary cache by now, I've fixed a bunch of failures related to a GHC bug | 16:38:50 |
| sterni (he/him) | the only trouble is development environments because LLVM is not always added correctly, I think | 16:39:10 |
| sterni (he/him) | it's a bit annoying that GHC expects LLVM to be in PATH | 16:39:27 |
| pennae | last we tried was almost a year ago now, and on gentoo | 16:39:40 |
| pennae | ghc just routinely failed to build at all there | 16:39:55 |
| sterni (he/him) | everything is working currently in terms of ghc except ghcHEAD | 16:41:54 |
| sterni (he/him) | which may work but the build keeps timing out for an unknown reason | 16:42:04 |
| sterni (he/him) | if someone wants to debug it I'd be very happy | 16:42:15 |
| sterni (he/him) | I think it may be because the machine hydra uses has too many cores, but who knows | 16:42:38 |
| pennae | might give it a try when(/if) we manage to put nixos on the thing | 16:48:02 |
| Las | In reply to @pennae:matrix.eno.space
maybe we should try to reinstall our pinebook and give aarch64 haskell another try
last we tried it was a bit of a massive pain in the tail FWIW I think you'll have a very hard time compiling anything until the new native code gen backend is released (GHC 9.2.1 IIRC) | 16:51:51 |
| Las | LLVM is quite slow | 16:52:09 |
| sterni (he/him) | it works at least :p | 16:52:53 |
