linker stderr: ld: ignoring duplicate libraries: '-lc', '-lm' on macOS when using `getrandom` dependency

I tried this code:

use getrandom as _;
fn main() {}

➜  example git:(main) ✗ cat Cargo.toml
[package]
name = "example"
version = "0.1.0"
edition = "2024"

[lints.rust]
linker-messages = "deny"

[dependencies]
getrandom = { version = "0.3.4", default-features = false }

I expected to see this happen: cargo build to run fine.

Instead, this happened: cargo build erred with:

error: linker stderr: ld: ignoring duplicate libraries: '-lc', '-lm'

  |
  = note: requested on the command line with `-D linker-messages`

error: could not compile `example` (bin "example") due to 1 previous error

Meta

rustc --version --verbose:

rustc 1.93.0 (254b59607 2026-01-19)
binary: rustc
commit-hash: 254b59607d4417e9dffbc307138ae5c86280fe4c
commit-date: 2026-01-19
host: aarch64-apple-darwin
release: 1.93.0
LLVM version: 21.1.8

➜  ~ uname -a
Darwin ZC0XYQV3R3Q 25.2.0 Darwin Kernel Version 25.2.0: Tue Nov 18 21:09:56 PST 2025; root:xnu-12377.61.12~1/RELEASE_ARM64_T6041 arm64

Reproduce the report with the shown Cargo.toml, Rust example, and cargo build on macOS using linker-messages = "deny". Start by tracing how rustc handles linker stderr and the duplicate -lc and -lm messages from the getrandom dependency. Done means the example builds without treating these expected linker messages as a fatal error.