error: extern items cannot be `const` --> $DIR/extern-const.rs:15:11 | LL | const rust_dbg_static_mut: libc::c_int; | ------^^^^^^^^^^^^^^^^^^^ | | | help: try using a static value: `static` | = note: for more information, visit https://doc.rust-lang.org/std/keyword.extern.html error: aborting due to 1 previous error