| ### What it does |
| Checks for cfg attributes having operating systems used in target family position. |
| |
| ### Why is this bad? |
| The configuration option will not be recognised and the related item will not be included |
| by the conditional compilation engine. |
| |
| ### Example |
| ``` |
| #[cfg(linux)] |
| fn conditional() { } |
| ``` |
| |
| Use instead: |
| ``` |
| #[cfg(target_os = "linux")] |
| fn conditional() { } |
| |
| // or |
| |
| #[cfg(unix)] |
| fn conditional() { } |
| ``` |
| Check the [Rust Reference](https://doc.rust-lang.org/reference/conditional-compilation.html#target_os) for more details. |
