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Nix Rust

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22 May 2025
@emilazy:matrix.orgemilyyou can fetch the NAR09:00:12
@emilazy:matrix.orgemilyshouldn't the non-FOD part mostly just be a bunch of symlinks?09:00:22
@emilazy:matrix.orgemily Alyssa Ross: do you have a preference between the diffs of https://github.com/NixOS/nixpkgs/pull/408710/files and https://github.com/NixOS/nixpkgs/pull/407790/files? they both fix pkgsStatic.buildPackages.rustc on Darwin, and they'll both leave some other cases unavoidably silently weird/broken (I think maybe slightly different cases between them). the original PR no longer depends on pkgsStatic. it's a bit more noisy but saves a rustc build. the other one is a smaller diff / fewer moving parts, but the ordering change is sort of unprincipled (albeit I think likely to make the build go through in strictly more cases than the status quo) 09:02:30
@qyliss:fairydust.spaceAlyssa RossI don't think I mind either09:06:36
@qyliss:fairydust.spaceAlyssa RossI'd still really like to see the custom target specs eventually09:06:50
@qyliss:fairydust.spaceAlyssa RossConsider them both acked09:06:59
@emilazy:matrix.orgemilyme too, but cleaning up Rust is more work than I have the capacity for right now :(09:08:32
@emilazy:matrix.orgemily honestly we should really build std in a separate derivation always, I think 09:08:40
@emilazy:matrix.orgemilyand with the right platform triples09:08:43
@emilazy:matrix.orgemily rather than building a "rustc" that is actually just the target platform std 09:08:54
@qyliss:fairydust.spaceAlyssa Ross IIRC @Ericson2314:matrix.org didn't think it was possible some time in the past 09:10:08
@emilazy:matrix.orgemily why not? it's exactly what fastCross does, right? 09:11:25
@emilazy:matrix.orgemily like fastCross could just not link in the rustc in installation phase, and swizzle around the targets that it passes, and then we could wrap them together later 09:12:09
@emilazy:matrix.orgemily I guess the problem is that the non-cross compiler would still want to build the target std 09:12:28
@emilazy:matrix.orgemily -Zbuild-std at least helps… 09:12:39
@k900:0upti.meK900One day we'll have cargo-std-aware09:13:08
@emilazy:matrix.orgemily patch Rust to accept -Zbuild-std on stable, do separate-Rust-crate-packaging, make std one of them 🙃 09:13:14
@k900:0upti.meK900One day09:13:15

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