rust/tests/ui/unused-crate-deps/warn-cmdline-static.rs

// Check for unused crate dep, no path

//@ edition:2018
//@ check-pass
//@ compile-flags: -Wunused-crate-dependencies
//@ aux-crate:bar=bar.rs
//@ no-prefer-dynamic

fn main() {}
//~^ WARNING external crate `bar` unused in
Implement warning for unused dependencies. This will print a diagnostic for crates which are mentioned as `--extern` arguments on the command line, but are never referenced from the source. This diagnostic is controlled by `-Wunused-crate-dependencies` or `#![warn(unused_crate_dependencies)]` and is "allow" by default. There are cases where certain crates need to be linked in but are not directly referenced - for example if they are providing symbols for C linkage. In this case the warning can be suppressed with `use needed_crate as _;`. Thanks to @petrochenkov for simplified core. Resolves issue #57274 2020-05-17 08:48:01 +00:00			`// Check for unused crate dep, no path`

			`//@ edition:2018`
			`//@ check-pass`
			`//@ compile-flags: -Wunused-crate-dependencies`
			`//@ aux-crate:bar=bar.rs`
			`//@ no-prefer-dynamic`

			`fn main() {}`
			//~^ WARNING external crate `bar` unused in