error: unsafe attribute used without unsafe
  --> $DIR/ffi_pure.rs:16:7
   |
LL |     #[ffi_pure]
   |       ^^^^^^^^ usage of unsafe attribute
   |
help: wrap the attribute in `unsafe(...)`
   |
LL |     #[unsafe(ffi_pure)]
   |       +++++++        +

error: `#[ffi_pure]` attribute cannot be used on functions
  --> $DIR/ffi_pure.rs:4:1
   |
LL | #[unsafe(ffi_pure)]
   | ^^^^^^^^^^^^^^^^^^^
   |
   = help: `#[ffi_pure]` can only be applied to foreign functions

error: `#[ffi_pure]` attribute cannot be used on macro defs
  --> $DIR/ffi_pure.rs:7:1
   |
LL | #[unsafe(ffi_pure)]
   | ^^^^^^^^^^^^^^^^^^^
   |
   = help: `#[ffi_pure]` can only be applied to foreign functions

error: `#[ffi_pure]` attribute cannot be used on foreign statics
  --> $DIR/ffi_pure.rs:13:5
   |
LL |     #[unsafe(ffi_pure)]
   |     ^^^^^^^^^^^^^^^^^^^
   |
   = help: `#[ffi_pure]` can only be applied to foreign functions

error: aborting due to 4 previous errors