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SuperSandro2000 merged 1 commit into from
Oct 19, 2021
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doc: rust: target escape hatch has been removed #142173

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16 changes: 0 additions & 16 deletions doc/languages-frameworks/rust.section.md
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Expand Up @@ -237,22 +237,6 @@ where they are known to differ. But there are ways to customize the argument:
--target /nix/store/asdfasdfsadf-thumb-crazy.json # contains {"foo":"","bar":""}
```

Finally, as an ad-hoc escape hatch, a computed target (string or JSON file
path) can be passed directly to `buildRustPackage`:

```nix
pkgs.rustPlatform.buildRustPackage {
/* ... */
target = "x86_64-fortanix-unknown-sgx";
}
```

This is useful to avoid rebuilding Rust tools, since they are actually target
agnostic and don't need to be rebuilt. But in the future, we should always
build the Rust tools and standard library crates separately so there is no
reason not to take the `stdenv.hostPlatform.rustc`-modifying approach, and the
ad-hoc escape hatch to `buildRustPackage` can be removed.

Note that currently custom targets aren't compiled with `std`, so `cargo test`
will fail. This can be ignored by adding `doCheck = false;` to your derivation.

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