Closed
Description
Problem
Cargo.toml
[package]
name = "hello"
version = "0.1.0"
edition = "2021"
[dependencies]
libc = "*"
src/lib.rs
#![deny(unused_crate_dependencies)]
src/main.rs
#![deny(unused_crate_dependencies)]
use hello as _;
use libc;
fn main() {
let _: libc::size_t = 0;
}
In package hello
, libc
is needed by bin crate, not lib crate.
Steps
To reproduce, run cargo build
. The build fails.
Possible Solution(s)
Because libc
is needed by the bin crate, we have to list it as a package dependency. But then the lib crate complains.
One possible solution is to have each crate specify its own dependencies. The package-level dependencies would then be the union of all crate-level dependencies. But crate-level dependencies make more sense because users of a package may not want everything in the package. For example a user merely interested in using the library crate shouldn't be forced to pull dependencies required by binary crates.
Notes
No response
Version
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Area: selection and definition of targets (lib, bins, examples, tests, benches)Area: selection and definition of targets (lib, bins, examples, tests, benches)Category: bugCategory: bugStatus: ❌ blocked on something out of the direct control of the Cargo project, e.g., upstream fixStatus: ❌ blocked on something out of the direct control of the Cargo project, e.g., upstream fix