| 7 May 2025 |
 szlend | is there any way to get a pkgs instance where buildPlatform != hostPlatform != targetPlatform? | 20:30:56 |
 Alyssa Ross | I don't think so | 20:37:40 |
| szlend | I'm trying to map how pkgs<host><target> packages are offset inside another pkgs<host><target> and it would really help with understanding | 20:58:45 |
| szlend | it don't actually need to build anything | 20:59:51 |
 K900 | Are you trying to do Canadian cross | 21:09:37 |
| K900 | Also can we PLEASE kill targetPlatform | 21:09:43 |
| K900 | Yes I will keep bringing this up | 21:09:50 |
| szlend | I'm trying to wire up a spliced package set with makeScopeWithSplicing that is not overlayed on top of pkgs. Usually you would wire it up with generateSplicesForMkScope, but that's not an option here. You can wire up otherSplices naively with recursion, but that explodes evaluation very quickly, as it unnecessarily evaluates against the same pkgs<host><target> instances. | 21:20:43 |
 SomeoneSerge (matrix works sometimes) | I was very stupidly confused about this even though there are only two kinds of "offsets" in the end. I just couldn't figure out which sense is meant in any particular place. TLDR: Offsets in Nixpkgs manual are points, but {host,target}Offsets in setup-hooks are vectors | 21:21:51 |
| szlend | This is my understanding of how perspective shifts, but I could be very wrong: https://gist.github.com/szlend/62bfa710ff89b7dc3a871693ca34c94c | 21:22:38 |
| szlend | So I kinda wanna confirm it :D | 21:22:45 |
| SomeoneSerge (matrix works sometimes) | Does root refer to the current derivation? | 21:25:44 |
| K900 | Can you not overlay it on pkgs? | 21:27:35 |
| szlend | I'm thinking about it like root == pkgsCross.<platform> == pkgsCross.<platform>.pkgsHostTarget (assuming those are equivalent) | 21:27:44 |
| szlend | so pkgsCross.<platform>.pkgsBuildHost.pkgsBuildTarget == pkgsCross.<platform>.pkgsHostHost | 21:28:39 |
| szlend | * so pkgsCross.<platform>.pkgsBuildHost.pkgsTargetTarget == pkgsCross.<platform>.pkgsHostHost | 21:28:57 |
| szlend | or maybe root.pkgsBuildHost.pkgsTargetTarget == root.pkgsHostTarget (since targetTarget is +1,+1) | 21:36:15 |
| SomeoneSerge (matrix works sometimes) | It's the former, because ps: ps.pkgsTargetTarget translates by the vector of (1, 0), which is how you get from the point (0, 1) (pkgs = pkgsHostTarget) to the point (1, 1) (pkgs.pkgsTargetTarget) | 21:41:55 |
| SomeoneSerge (matrix works sometimes) | Setup-hooks here print the accumulated vectors, but not the result of translating the current' derivation's platforms (0, 1) by that vector | 21:44:01 |
| szlend | I see yeah, thanks! I think I actually got it then | 21:48:52 |
| 8 May 2025 |
|  @98765abc:mozilla.org changed their profile picture. | 11:35:04 |
 @curid:matrix.org | Redacted or Malformed Event | 19:03:13 |
| @curid:matrix.org | Is there a better way to write this?
NIX_CFLAGS_COMPILE = if pkgs.system == "aarch64-unknown-linux-gnu" then "" else "-msse4.2" | 19:14:52 |
| K900 | if !stdenv.hostPlatform.isx86 | 19:17:58 |
| K900 | Or rather | 19:18:10 |
| K900 | lib.optionalString stdenv.hostPlatform.isx86 "-msse4.2" | 19:18:21 |
