Mold 3.0.0 Released

6.5 relevance

New linker release, actionable for build tooling improvements.

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Why It Matters

For a solutions architect focused on devtools and Rust, this milestone demonstrates Rust's viability for critical infrastructure, offering improved safety without performance trade-offs, which can enhance build pipeline reliability and security.

Key Takeaways

Upgrade to Mold 3.0.0 to leverage Rust's safety guarantees and prepare for GNU ld compatibility, but update your build scripts to use Cargo.

mold 3.0.0 is a new major release of the high-speed linker. As we announced in the 2.42.1 release notes, we have rewritten mold from C++ to Rust, and this is the first release of the Rust version. ...

Summary

Mold 3.0.0 is the first Rust-based release, replacing the C++ 2.42.1 as a drop-in with identical CLI and output, but with bounds-checked memory access for safety. Performance remains on par, while the build system shifts to Cargo (Rust 1.95+) and drops CMake and oneTBB. The release fixes several crashes and nondeterministic output, advancing the goal of becoming the default Linux linker.

Author

rui314