user/helix: use env var for musl from https://docs.helix-editor.com/building-from-source.html

[zacharyburnett]

Description

when attempting hx --grammar build, the following error occurs:

error occurred in cc-rs: unknown target `x86_64-chimera-linux-musl`.

NOTE: `cc-rs` only supports a fixed set of targets when not in a build script.
- If adding a new target, you will need to fork of `cc-rs` until the target
  has landed on nightly and the auto-generated list has been updated. See also
  the `rustc` dev guide on adding a new target:
  https://rustc-dev-guide.rust-lang.org/building/new-target.html
- If using a custom target, prefer to upstream it to `rustc` if possible,
  otherwise open an issue with `cc-rs`:
  https://github.com/rust-lang/cc-rs/issues/new

The docs say to use the following env var when building:

RUSTFLAGS="-C target-feature=-crt-static"

Checklist

Before this pull request is reviewed, certain conditions must be met.

The following must be true for all changes:

• I have read CONTRIBUTING.md

The following must be true for template/package changes:

• I have read Packaging.md
• I have built and tested my changes on my machine

The following must be true for new package submissions:

• I will take responsibility for my template and keep it up to date

[zacharyburnett]

oof, the package builds on my machine but hx --grammar build still doesn't work, I think I need to put the env var in a different place

[q66]

i'm not sure what you are trying to achieve here but this is completely unrelated and irrelevant, all chimera targets are shared crt by default

what you are running into is this rust-lang/cc-rs#1407 but that's not something a change in helix build will fix

[zacharyburnett]

ok, as a workaround in case anyone else finds this, I built helix from source, ran hx --grammar fetch && hx --grammar build, and then copied the runtime/ dir to ~/.config/helix/runtime/, and the grammars are now functioning for the cports package.

[q66]

it'll probably fix itself when everything updates their lockfiles to cc-v1.2.17 or newer