error[E0539]: malformed `link` attribute input
  --> $DIR/E0458.rs:1:1
   |
LL | #[link(kind = "wonderful_unicorn")] extern "C" {}
   | ^^^^^^^^^^^^^^-------------------^^
   |               |
   |               valid arguments are "static", "dylib", "framework", "raw-dylib" or "link-arg"
   |
   = 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
   |
LL - #[link(kind = "wonderful_unicorn")] extern "C" {}
LL + #[link(name = "...")] extern "C" {}
   |
LL - #[link(kind = "wonderful_unicorn")] extern "C" {}
LL + #[link(name = "...", import_name_type = "decorated|noprefix|undecorated")] extern "C" {}
   |
LL - #[link(kind = "wonderful_unicorn")] extern "C" {}
LL + #[link(name = "...", kind = "dylib|static|...")] extern "C" {}
   |
LL - #[link(kind = "wonderful_unicorn")] extern "C" {}
LL + #[link(name = "...", kind = "dylib|static|...", wasm_import_module = "...", import_name_type = "decorated|noprefix|undecorated")] extern "C" {}
   |
   = and 1 other candidate

error[E0459]: `#[link]` attribute requires a `name = "string"` argument
  --> $DIR/E0458.rs:1:1
   |
LL | #[link(kind = "wonderful_unicorn")] extern "C" {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ missing `name` argument

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0459, E0539.
For more information about an error, try `rustc --explain E0459`.