error: `#[macro_export]` has no effect on declarative macro definitions
  --> $DIR/macro_export_on_decl_macro.rs:6:1
   |
LL | #[macro_export]
   | ^^^^^^^^^^^^^^^
   |
   = note: declarative macros follow the same exporting rules as regular items
note: the lint level is defined here
  --> $DIR/macro_export_on_decl_macro.rs:4:9
   |
LL | #![deny(unused)]
   |         ^^^^^^
   = note: `#[deny(unused_attributes)]` implied by `#[deny(unused)]`

error: aborting due to previous error