| 4 Sep 2023 |
 ash (it/its) 🏳️⚧️ | i'm trying to explore the possibility of having a system whose "native" architecture is wasm64-wasi but always cross-compiles packages to the host architecture. that way, everything is cross compiled using a "standard" wasm64-wasi toolchain and you could, for example, have heterogenous machines that both specify wasm64-wasi in boot.binfmt.emulatedSystems and are then able to share packages | 19:06:24 |
| ash (it/its) 🏳️⚧️ | unfortunately if i try to do for instance, NIXPKGS_ALLOW_UNSUPPORTED_SYSTEM=1 nix-build . -A stdenv --argstr system "wasm64-wasi" it exits because ENOENT when calling /bin/bash. i don't know if bash in this case is actually nonexistent or if it's a different issue (like bad linker path) but i don't actually understand how nixpkgs bootstraps itself or how to generate a bootstrap tarball or anything like that. it may not even be feasible at this point to generate a wasm stdenv! but i'd like to try and document it. | 19:12:40 |
 rhelmot | the nixpkgs bootstrap routine is in pkgs/stdenv | 19:21:21 |
| rhelmot | you can in fact bootstrap without a bootstrap tarball if you're willing to temporarily copy some files off the host | 19:21:46 |
| rhelmot | the way it works is that there's a bootstrap routine for each host platform and it incrementally builds more and more packages out of nothing until it can instantiate all-packages in some meaningful way, then you can do whatever you want from there to achieve self-sufficiency | 19:22:44 |
| ash (it/its) 🏳️⚧️ | where is the bootstrap routine located? | 19:25:55 |
| ash (it/its) 🏳️⚧️ | presumably there's one for x86_64-linux but not wasm64-wasi? | 19:26:12 |
| rhelmot | for which host platform? | 19:26:12 |
| rhelmot | there's one for linux in general, it's in pkgs/stdenv/linux | 19:26:26 |
| rhelmot | I truthfully don't know a lot about how the particular stdenv gets selected, when I was messing with it I just blindly grepped through and added cases until it worked | 19:27:26 |
| ash (it/its) 🏳️⚧️ | interesting | 19:30:58 |
| ash (it/its) 🏳️⚧️ | so i suppose for this it would mean creating a bootstrap for wasi | 19:32:34 |
| rhelmot | okay okay hang on I can think about this more critically - creating a stdenv for wasi would imply that you had already compiled nix itself for wasi and you wanted to boot nixpkgs under that environment | 19:33:29 |
| rhelmot | I have no knowledge about cross compilation... | 19:33:53 |
| ash (it/its) 🏳️⚧️ | In reply to@rhelmot:matrix.org
okay okay hang on I can think about this more critically - creating a stdenv for wasi would imply that you had already compiled nix itself for wasi and you wanted to boot nixpkgs under that environment well, not necessarily i think? i can native compile aarch64 packages with an x86_64 host if i do boot.binfmt.emulatedSystems = [ "aarch64-linux" ]; i just want to do the same for wasi | 19:36:13 |
| rhelmot | yeah - but you're still using your host's stdenv, you've just parameterized it with a compiler for the target system | 19:37:21 |
| rhelmot | (I think? grains of salt all around) | 19:37:33 |
| ash (it/its) 🏳️⚧️ | then in that case it would be impure, i think. but native compilation is pure that way, so i think it's not like that. | 19:38:15 |
| ash (it/its) 🏳️⚧️ | ie i can substitute from a binary cache if i use emulatedSystems, but i can't if i'm cross compiling | 19:39:02 |
| rhelmot | ......huh | 19:39:15 |
| ash (it/its) 🏳️⚧️ | oh, #stdenv:nixos.org exists. will continue there. | 19:41:54 |
|  Ramses 🇵🇸 joined the room. | 22:02:45 |
|  👉@crystallinefire:chat.solarpunk.moe changed their display name from hive hive ⬡ to hive ⬡. | 23:15:41 |
| 7 Sep 2023 |
|  @jkachmar:matrix.org changed their profile picture. | 16:01:14 |
| 8 Sep 2023 |
|  Alex S joined the room. | 13:07:51 |
|  __Sander__ joined the room. | 13:16:04 |
| 11 Sep 2023 |
|  @olafklingt:matrix.org left the room. | 19:17:40 |
| 12 Sep 2023 |
| rhelmot | [nix-shell:~/proj/nix/nixpkgs]$ which nix
/nix/store/cchfc7cdajg5kbx31x6y6bn8ridqw6k1-nix-2.17.0/bin/nix
[nix-shell:~/proj/nix/nixpkgs]$ uname
FreeBSD
yay
| 17:30:06 |
| rhelmot | pr time | 17:30:15 |
 trofi | Congrats! | 18:22:22 |
