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Switching to Rust's own mangling scheme on nightly (blog.rust-lang.org)
submitted 11 months ago by to c/rust@programming.dev
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[–] 2 points 11 months ago (2 children) 
#[unsafe(export_name = "my_super_duper_function")]
pub fn foo() {}

I would recommend reading up some materials on FFI in Rust if you're interested. Calling functions in Rust from C and in C from Rust (or even languages other than C) is both extremely common and a primary usecase of the language.

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  • [–] 1 point 11 months ago (1 child)

    Wouldn't that make the body of the function unsafe too?

    I would recommend reading up some materials on FFI in Rust

    Yeah, I'm slowly getting to that

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  • [–] 3 points 11 months ago

    No, the attribute is unsafe. An unsafe function is marked unsafe fn.

    Also, unsafe by itself just means there are invariants that must me manually upheld to avoid unsound behavior. If those invariants are upheld, then it doesn't matter if it's unsafe.

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