Document how to use as a standalone linker

[petr-tik]

Hey, thanks for the awesome project.

I was curious to try zld with cargo/rust, but found no instructions to do so.

If you are willing and able to dedicate time, I would appreciate if you could document how to point cargo to use zld for linking.

Mold has something like this, which makes it pretty easy
https://github.com/rui314/mold#how-to-use

[kubkon]

Hi @petr-tik! Thanks for dropping this comment - I will be honest with you that I never thought of bare zld being used this way at all - I always intended for it to be used via the Zig compiler directly. However, you are making a good point, and I am actively trying my best to keep this repo with the changes to the MachO linker in Zig proper in sync, so I will work on a short note on how you can use the zld as a drop-in linker replacement.

[petr-tik]

Nice! Glad you find this interesting. It will help zig adoption if people can try a standalone zig-implemented linker, measure its performance improvement without learning about zig, toolchain and installation.

Personally, I am most interested in linking 1GB+ Cpp executables built with cmake and rust executables built with cargo on Linux x86_64. Happy to test drive, compare against mold and report results.