rust/tests/ui/extern/extern-const.rs
Alex Crichton cf6d6050f7 Update test directives for wasm32-wasip1
* The WASI targets deal with the `main` symbol a bit differently than
  native so some `codegen` and `assembly` tests have been ignored.
* All `ignore-emscripten` directives have been updated to
  `ignore-wasm32` to be more clear that all wasm targets are ignored and
  it's not just Emscripten.
* Most `ignore-wasm32-bare` directives are now gone.
* Some ignore directives for wasm were switched to `needs-unwind`
  instead.
* Many `ignore-wasm32*` directives are removed as the tests work with
  WASI as opposed to `wasm32-unknown-unknown`.
2024-03-11 09:36:35 -07:00

25 lines
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Rust

// Check extern items cannot be const + `rustfix` suggests using
// extern static.
//
// #54388: an unused reference to an undefined static may or may not
// compile. To sidestep this by using one that *is* defined.
//@ run-rustfix
//@ compile-flags: -g
#![feature(rustc_private)]
extern crate libc;
#[link(name = "rust_test_helpers", kind = "static")]
extern "C" {
const rust_dbg_static_mut: libc::c_int; //~ ERROR extern items cannot be `const`
}
fn main() {
// We suggest turning the (illegal) extern `const` into an extern `static`,
// but this also requires `unsafe` (a deny-by-default lint at comment time,
// future error; Issue #36247)
unsafe {
let _x = rust_dbg_static_mut;
}
}