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Better error diagnostics on targets without std. #899

Merged
merged 1 commit into from
Jul 3, 2022
Merged

Better error diagnostics on targets without std. #899

merged 1 commit into from
Jul 3, 2022

Commits on Jul 3, 2022

  1. Better error diagnostics on targets without std. 

    Provides a warning if a docker command fails and `rust-std` is not available for the target. For example, for `x86_64-unknown-dragonfly`, the added output would be:

```bash
[cross] warning: rust-std is not available for x86_64-unknown-dragonfly
[cross] note: you may need to build components for the target via `-Z build-std=<components>` or in your cross configuration specify `target.x86_64-unknown-dragonfly.build-std`
              the available components are core, std, alloc, and proc_macro
```

This is done solely if the command fails and if the target is a built-in, so we don't get misleading warnings for custom targets, and there is no overhead if the build succeeds.
    @Alexhuszagh
    Alexhuszagh committed Jul 3, 2022
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