#![allow(ill_formed_attribute_input)]

#[link="dl"]
unsafe extern "C" {
    pub fn foo();
}

error[E0539]: malformed `link` attribute input
 --> src/lib.rs:3:1
  |
3 | #[link="dl"]
  | ^^^^^^^^^^^^ expected this to be a list
  |
  = note: for more information, visit <https://doc.rust-lang.org/reference/items/external-blocks.html#the-link-attribute>
help: try changing it to one of the following valid forms of the attribute
  |
3 - #[link="dl"]
3 + #[link(name = "...")]
  |
3 - #[link="dl"]
3 + #[link(name = "...", import_name_type = "decorated|noprefix|undecorated")]
  |
3 - #[link="dl"]
3 + #[link(name = "...", kind = "dylib|static|...")]
  |
3 - #[link="dl"]
3 + #[link(name = "...", kind = "dylib|static|...", wasm_import_module = "...", import_name_type = "decorated|noprefix|undecorated")]
  |
  = and 1 other candidate

For more information about this error, try `rustc --explain E0539`.