| 25 Apr 2025 |
 maralorn | My impression is that haskell.nix is a good fit for larger projects/companies where reliably targeting many plattforms is a requirement, it is unrealistic for every team member to be well-versed in the manual dependency resolution dance of nixpkgs, caching is a non-issue because they need their own cache anyway and upstreaming is not a priority. | 15:20:20 |
| maralorn | * My impression is that haskell.nix is a better fit for larger projects/companies where reliably targeting many plattforms is a requirement, it is unrealistic for every team member to be well-versed in the manual dependency resolution dance of nixpkgs, caching is a non-issue because they need their own cache anyway and upstreaming is not a priority. | 15:20:51 |
| maralorn | But I have not actually used haskell.nix a lot. | 15:21:25 |
 toonn | The Nixpkgs infra makes it hard to pick versions of deps. That applies for small projects more than large projects, IMO. | 15:25:28 |
 thirdofmay18081814goya | hm I see | 15:39:30 |
| thirdofmay18081814goya | lots to read and test out heheh, tyvm for comments | 15:39:42 |
|  Find me at aleksana:qaq.li joined the room. | 15:39:50 |
 shapr | We used haskell.nix when I worked at SimSpace. We had one employee who spent all their time on the nix toolchain things. It was worth it! | 15:41:10 |
| shapr | For my own use, stock nixpkgs is fine 99% of the time. | 15:41:25 |
| 26 Apr 2025 |
| Find me at aleksana:qaq.li | I'm trying to build our haskell ecosystem part in Nixpkgs on loongarch64. loongarch64 support of haskell is only available after ghc>=9.12 and llvm>=18. Currently our default is ghc 9.6 and llvm 15. | 03:54:06 |
| Find me at aleksana:qaq.li | There are two issues here, the less significant issue is that I need to change the default ghc version to 9.12, but I don't know how compatible our stackage is with this version. | 03:55:29 |
| Find me at aleksana:qaq.li | The bigger issue is that I can't rely on 9.10 to compile 9.12, like we do now, so I should package a binary distribution of 9.12, but upstream does not publish binary distribution built for loongarch64. | 03:56:56 |
| Find me at aleksana:qaq.li | Oh, there's hadrian bootstrap source, but upstream only publishes 9.8 and 9.10 | 04:01:30 |
| Find me at aleksana:qaq.li | Wait, seems like the support is older than I got, I just have to get a set of patches | 04:10:25 |
| Find me at aleksana:qaq.li | In reply to @aleksana:mozilla.org
Oh, there's hadrian bootstrap source, but upstream only publishes 9.8 and 9.10 It's not ghc with hc files generated 😣 | 04:38:25 |
 Alex | In reply to @aleksana:mozilla.org
The bigger issue is that I can't rely on 9.10 to compile 9.12, like we do now, so I should package a binary distribution of 9.12, but upstream does not publish binary distribution built for loongarch64. You can cross-compile 9.4 using the LLVM backend and use that to natively compile newer versions. | 09:10:30 |
| Find me at aleksana:qaq.li | In reply to @alex:tunstall.xyz
You can cross-compile 9.4 using the LLVM backend and use that to natively compile newer versions. There's no loongarch64 support in ghc94 at all | 09:15:18 |
| Find me at aleksana:qaq.li | I'm trying to cross compile ghc 9.8.4 with no luck | 09:15:37 |
| Alex | It doesn't matter. You can use unregisterised mode. | 09:15:40 |
| Alex | AFAIK cross is completely broken with Hadrian.
If you can get it to work, I'd love to know how. | 09:16:05 |
| Find me at aleksana:qaq.li | In reply to @alex:tunstall.xyz
AFAIK cross is completely broken with Hadrian.
If you can get it to work, I'd love to know how. I don't write haskell at all tbh | 09:16:27 |
| Find me at aleksana:qaq.li | In reply to @alex:tunstall.xyz
It doesn't matter. You can use unregisterised mode. Do we have nix code for unregisterised mode already? | 09:17:14 |
| Alex | Unregisterised GHC relies entirely on the C compiler and needs no knowledge of the target architecture. | 09:17:16 |
| Alex | Yes, you can set it explicitly, but GHC will do so automatically if it doesn't recognise the architecture anyway. | 09:17:49 |
| Find me at aleksana:qaq.li | Oh so pkgsCross.loongarch64-linux.haskell.packages.ghc984.ghc is hadrian | 09:21:05 |
| Find me at aleksana:qaq.li | I have to use pkgsCross.loongarch64-linux.haskell.packages.native-bignum.ghc984.ghc and temporarily override enableUnregisterised | 09:22:57 |
 magic_rb | Youre porting ghc to loongarch? | 09:26:26 |
| Find me at aleksana:qaq.li | In reply to @magic_rb:matrix.redalder.org
Youre porting ghc to loongarch? Not porting, just making it work in nixpkgs | 09:26:42 |
| Find me at aleksana:qaq.li | The porting work has largely done on ghc>=9.6.6 and llvm>=16 actually | 09:27:06 |
| magic_rb | Ah, i went to aliexpress, punched in loongarch64, got a page full of toothbrushes lol | 09:27:21 |
