27 lines
711 B
Rust
27 lines
711 B
Rust
//! The symbols are resolved by the linker. It doesn't make sense to change
|
|
//! them at runtime, so deny mutable statics with #[linkage].
|
|
|
|
#![feature(linkage)]
|
|
// FIXME(static_mut_refs): Do not allow `static_mut_refs` lint
|
|
#![allow(static_mut_refs)]
|
|
|
|
fn main() {
|
|
#[rustfmt::skip]
|
|
extern "C" {
|
|
#[linkage = "extern_weak"] //~ ERROR extern mutable statics are not allowed with `#[linkage]`
|
|
static mut EXTERN_WEAK: *const u8;
|
|
}
|
|
|
|
unsafe {
|
|
assert_eq!(EXTERN_WEAK as usize, 0);
|
|
}
|
|
|
|
// static mut is fine here as this is a definition rather than declaration.
|
|
#[linkage = "weak"]
|
|
static mut WEAK_DEF: u8 = 42;
|
|
|
|
unsafe {
|
|
assert_eq!(WEAK_DEF, 0);
|
|
}
|
|
}
|