tests/ui/lint/lint-gpu-kernel.amdgpu.stderr

warning: `extern` fn uses type `()`, which is not FFI-safe
  --> $DIR/lint-gpu-kernel.rs:36:35
   |
LL | extern "gpu-kernel" fn arg_zst(_: ()) { }
   |                                   ^^ not FFI-safe
   |
   = help: consider using a struct instead
   = note: tuples have unspecified layout
   = note: `#[warn(improper_ctypes_definitions)]` on by default

warning: passing type `()` to a function with "gpu-kernel" ABI may have unexpected behavior
  --> $DIR/lint-gpu-kernel.rs:36:35
   |
LL | extern "gpu-kernel" fn arg_zst(_: ()) { }
   |                                   ^^
   |
   = help: use primitive types and raw pointers to get reliable behavior
   = note: `#[warn(improper_gpu_kernel_arg)]` on by default

warning: passing type `&i32` to a function with "gpu-kernel" ABI may have unexpected behavior
  --> $DIR/lint-gpu-kernel.rs:41:35
   |
LL | extern "gpu-kernel" fn arg_ref(_: &i32) { }
   |                                   ^^^^
   |
   = help: use primitive types and raw pointers to get reliable behavior

warning: passing type `&mut i32` to a function with "gpu-kernel" ABI may have unexpected behavior
  --> $DIR/lint-gpu-kernel.rs:44:39
   |
LL | extern "gpu-kernel" fn arg_ref_mut(_: &mut i32) { }
   |                                       ^^^^^^^^
   |
   = help: use primitive types and raw pointers to get reliable behavior

warning: `extern` fn uses type `S`, which is not FFI-safe
  --> $DIR/lint-gpu-kernel.rs:49:38
   |
LL | extern "gpu-kernel" fn arg_struct(_: S) { }
   |                                      ^ not FFI-safe
   |
   = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
   = note: this struct has unspecified layout
note: the type is defined here
  --> $DIR/lint-gpu-kernel.rs:47:1
   |
LL | struct S { a: i32, b: i32 }
   | ^^^^^^^^

warning: passing type `S` to a function with "gpu-kernel" ABI may have unexpected behavior
  --> $DIR/lint-gpu-kernel.rs:49:38
   |
LL | extern "gpu-kernel" fn arg_struct(_: S) { }
   |                                      ^
   |
   = help: use primitive types and raw pointers to get reliable behavior

warning: `extern` fn uses type `(i32, i32)`, which is not FFI-safe
  --> $DIR/lint-gpu-kernel.rs:54:35
   |
LL | extern "gpu-kernel" fn arg_tup(_: (i32, i32)) { }
   |                                   ^^^^^^^^^^ not FFI-safe
   |
   = help: consider using a struct instead
   = note: tuples have unspecified layout

warning: passing type `(i32, i32)` to a function with "gpu-kernel" ABI may have unexpected behavior
  --> $DIR/lint-gpu-kernel.rs:54:35
   |
LL | extern "gpu-kernel" fn arg_tup(_: (i32, i32)) { }
   |                                   ^^^^^^^^^^
   |
   = help: use primitive types and raw pointers to get reliable behavior

warning: function with the "gpu-kernel" ABI has a mangled name
  --> $DIR/lint-gpu-kernel.rs:61:1
   |
LL | pub extern "gpu-kernel" fn mangled_kernel() { }
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: use `unsafe(no_mangle)` or `unsafe(export_name = "<name>")`
   = note: mangled names make it hard to find the kernel, this is usually not intended
   = note: `#[warn(missing_gpu_kernel_export_name)]` on by default

warning: 9 warnings emitted