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Add a note about building rust-analyzer-proc-macro-srv #1466

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8 changes: 8 additions & 0 deletions src/building/how-to-build-and-run.md
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Expand Up @@ -221,6 +221,14 @@ fall back to using `cargo` from the installed `nightly`, `beta`, or `stable` too
`rustup install nightly` if you haven't already. See the
[rustup documentation on custom toolchains](https://rust-lang.github.io/rustup/concepts/toolchains.html#custom-toolchains).

**Note:** rust-analyzer and IntelliJ Rust plugin use a component called `rust-analyzer-proc-macro-srv`
to work with proc macros. If you intend to use a custom toolchain for a project (e.g. via
`rustup override set stage1`) you may want to build this component:

```bash
x b proc-macro-srv-cli
```

## Building targets for cross-compilation

To produce a compiler that can cross-compile for other targets,
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