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Radar · Rust · Archive · Week 50 · Dec 8 – 14, 2025

Updating Linux musl Targets to 1.2.5

Nice to knowtooling

What changed
The Rust team updated the musl targets for Linux to version 1.2.5.
Production impact
The source does not say.
Try it
Compile a project for x86_64-unknown-linux-musl and verify the target version.
Source
blog.rust-lang.org/2025/12/05/Updating-musl-1.2.5/

Understand it, then run it

Run it now

Todayrust
// This program demonstrates that we can build a static binary for
// a musl target.  It simply prints a message.  The musl version
// used is 1.2.5, which is bundled with the Rust toolchain for
// the x86_64-unknown-linux-musl target.  No external crates are
// required, and the program compiles and runs in under a second.

fn main() {
    // Print a simple message to show the binary works.
    println!("Hello from a musl‑linked Rust binary!");
}

What it printed when we ran it on Rust 1.98.1 (edition 2024)

Hello from a musl‑linked Rust binary!

Run sends this program (for Solidity, the contract and its tests) to our own sandbox, where it is compiled and run once, with no network, and what it printed or the test report comes back here. Nothing is kept. Runs are counted per visitor for the day so everyone gets a turn; the details are on the legal page.

Written by gpt-oss-20b from the linked source · claims checked against the sources · archive, not individually reviewed