error[E0570]: `"ptx-kernel"` is not a supported ABI for the current target
  --> $DIR/unsupported.rs:28:1
   |
LL | extern "ptx-kernel" fn ptx() {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error[E0570]: `"aapcs"` is not a supported ABI for the current target
  --> $DIR/unsupported.rs:30:1
   |
LL | extern "aapcs" fn aapcs() {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^

error[E0570]: `"msp430-interrupt"` is not a supported ABI for the current target
  --> $DIR/unsupported.rs:36:1
   |
LL | extern "msp430-interrupt" fn msp430() {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error[E0570]: `"avr-interrupt"` is not a supported ABI for the current target
  --> $DIR/unsupported.rs:38:1
   |
LL | extern "avr-interrupt" fn avr() {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error[E0570]: `"x86-interrupt"` is not a supported ABI for the current target
  --> $DIR/unsupported.rs:45:1
   |
LL | extern "x86-interrupt" fn x86() {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error[E0570]: `"thiscall"` is not a supported ABI for the current target
  --> $DIR/unsupported.rs:50:1
   |
LL | extern "thiscall" fn thiscall() {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

warning: use of calling convention not supported on this target
  --> $DIR/unsupported.rs:56:1
   |
LL | extern "stdcall" fn stdcall() {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #87678 <https://github.com/rust-lang/rust/issues/87678>
   = note: `#[warn(unsupported_calling_conventions)]` on by default

error: aborting due to 6 previous errors; 1 warning emitted

For more information about this error, try `rustc --explain E0570`.