Rust Dylib Rabbit Holes

https://davidlattimore.github.io/posts/2024/08/27/rust-dylib-rabbit-holes.html

by jmillikin • 2 years ago

63 13 2 years ago

davidlattimore.github.io

vollbrecht• 2 years ago

A nice article that looks into a specific difference between llvm/lld and gnu ld, when it comes to shared objects on linux.

ninkendo4• 2 years ago

I sometimes wonder if Rust (or more accurately Cargo) needs a third default profile “fastbuild” that doesn’t have debug info and is optimised for building fast.

I’d go even further and say that cargo should have an option for simply checking if the code compiles (and borrow checks), but doesn’t even link it. 95% of the time when I’m writing code, I run cargo to see if the code I just wrote, compiles. Then it tells me about an error, I try to fix it, then run cargo again. In each of these instances I don’t even need to run or even link the code.

I use an IDE with LSP/rust-analyzer support to get errors as I type but it doesn’t catch a lot of errors (and doesn’t seem run borrow checking) so I need to do a cargo build to get the full error report, I just want this loop to be faster.

littlestymaar• 2 years ago

How that different from cargo check?

ninkendo4• 2 years ago

Interesting, now I feel like an idiot. I had assumed cargo check performs a superset of cargo build (as in, lint checks/etc) but looking at the docs you’re right, it does seem to be aimed at doing exactly what I describe, skipping final compilation steps and just checking if the code has errors.

Time to re-bind my IDE shortcuts!

boccaff• 2 years ago

Which can be incremented to `cargo watch -x check -x test -x "run --release" --clear` on a side terminal.

gwbas1c• 2 years ago

I use an IDE with LSP/rust-analyzer

VS Code does borrow checking for me in the IDE.

Granted, I've only done a hobby / weekend project; so I don't know if larger, industrial strength codebases will hit limitations that I don't see.

o11c• 2 years ago

Note that making shared generics protected breaks pointer equality when multiple shared libraries are involved. I'm pretty sure this is illegal in C++ but I'm not sure about Rust's rules.

Rust Dylib Rabbit Holes

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