06:04 <re_irc> <@dhr33ti:matrix.org> Hello!

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10:40 <re_irc> <@barafael:matrix.org> I have this project which uses egui to display an initial config screen for my e-hal driver. It uses clap and klask under the hood. It works nicely if I compile this for raspberry pi ON THE PI (apart from being slow). If I cross-compile using "cross", I obviously get linker errors (missing xcb, xcb-render, xcb-shape, xcb-xfixes at least). I'm not sure how I can fix these so that I can actually cross-compile here?

10:40 <re_irc> <@barafael:matrix.org> the project for reference is https://github.com/barafael/ebyte-e32-ui

10:41 <re_irc> <@k900:0upti.me> You'll have to get the aarch64 (or whatever) versions of your libraries on your source system, somehow

10:41 <re_irc> <@k900:0upti.me> I'm obviously biased but Nix can help here

10:49 <re_irc> <@barafael:matrix.org> onto my source system, this being the host where I build?

10:51 <re_irc> <@barafael:matrix.org> not sure how I would get those deps into the docker environment cross seems to use for its build

10:53 <re_irc> <@k900:0upti.me> Yes

10:54 <re_irc> <@k900:0upti.me> If you're using cross-rs, you'll need a custom dockerfile

10:54 <re_irc> <@k900:0upti.me> See https://github.com/cross-rs/cross#dockerfiles

10:54 <re_irc> <@k900:0upti.me> Or https://github.com/cross-rs/cross#pre-build-hook

11:36 <re_irc> <@barafael:matrix.org> TIL I need to install "buildx" for cross to work with a dockerfile, I think. Should this be added in the docs?

11:43 <re_irc> <@k900:0upti.me> Probably? tbh I'm not too familiar with how cross-rs works

11:43 <re_irc> <@k900:0upti.me> I just use Nix

11:43 <re_irc> <@k900:0upti.me> (btw)

11:57 <re_irc> <@barafael:matrix.org> any tutorials on how to do something like this with nix? I can't do it with cross so far

12:26 <re_irc> inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";

12:26 <re_irc> <@k900:0upti.me> : Something like this, basically:{

12:26 <re_irc> self,

12:26 <re_irc> nixpkgs,

12:26 <re_irc> outputs = {

12:26 <re_irc> }: let

12:26 <re_irc> pkgs = import nixpkgs {

12:26 <re_irc> localSystem = "x86_64-linux";

12:26 <re_irc> crossSystem = "aarch64-linux";

12:26 <re_irc> };

12:26 <re_irc> in {

12:26 <re_irc> packages.x86_64-linux.default = pkgs.rustPlatform.buildRustPackage {

12:26 <re_irc> name = "ebyte-e32-ui";

12:26 <re_irc> version = "1.0.0";

12:26 <re_irc> src = ./.;

12:26 <re_irc> cargoLock.lockFile = ./Cargo.lock;

12:26 <re_irc> buildInputs = [pkgs.xorg.libxcb];

12:26 <re_irc> };

12:26 <re_irc> };

12:26 <re_irc> }

12:26 <re_irc> <@k900:0upti.me> (very intentionally minimal example)

13:13 <re_irc> <@barafael:matrix.org> : I assume this goes into flake.nix? And, what then? I am looking around but not really finding any resources here either

13:13 <re_irc> <@k900:0upti.me> That goes into "flake.nix" and then you can just "nix build"

13:16 <re_irc> <@barafael:matrix.org> i tried that, it's saying something about extra-experimental-features not being supported. I added "--extra-experimental-features" everywhere but it doesn't seem to help

13:34 <re_irc> <@k900:0upti.me> Run `nix build --extra-experimental-features "flakes nix-command"

13:34 <re_irc> <@k900:0upti.me> * "nix build --extra-experimental-features "flakes nix-command""

14:03 <re_irc> <@barafael:matrix.org> No such file or directory is what I get. Today is not the day, I'm out of time and juice... Thanks for your help though :

20:50 <re_irc> <@thejpster:matrix.org> https://canonical.com/careers/4383713 👀