E0458 Update error format #35932

    - Fixes #35932
    - Part of #35233

    r? @jonathandturner

Author: gavinb

src/librustc_metadata/creader.rs

@@ -965,8 +965,9 @@ impl<'a> LocalCrateReader<'a> {
                 Some("dylib") => cstore::NativeUnknown,
                 Some("framework") => cstore::NativeFramework,
                 Some(k) => {
-                    span_err!(self.sess, m.span, E0458,
-                              "unknown kind: `{}`", k);
+                    struct_span_err!(self.sess, m.span, E0458,
+                              "unknown kind: `{}`", k)
+                        .span_label(m.span, &format!("unknown kind")).emit();
                     cstore::NativeUnknown
                 }
                 None => cstore::NativeUnknown

src/test/compile-fail/E0458.rs

@@ -9,7 +9,9 @@
 // except according to those terms.
 
 #[link(kind = "wonderful_unicorn")] extern {} //~ ERROR E0458
-                                              //~^ ERROR E0459
+                                              //~| NOTE unknown kind
+                                              //~| ERROR E0459
+                                              //~| NOTE missing `name` argument
 
 fn main() {
 }