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doc: Point out common problem installing c2rust

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chrysn 2024-08-29 14:36:38 +02:00
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doc/doxygen/src/using-rust.md
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@ -151,6 +151,12 @@ as this is using some recent fixes, it is best installed as:
$ cargo install c2rust --git https://github.com/immunant/c2rust
```
If multiple versions of LLVM are installed locally, it may be necessary to prefix it with the selected LLVM version:
```
$ LLVM_CONFIG_PATH=/usr/bin/llvm-config-16 cargo install …
```
[cargo]: https://doc.rust-lang.org/cargo/
[**rustup**, installed as described on its website]: https://rustup.rs/