error[E0658]: C-variadic functions with the "efiapi" calling convention are unstable
  --> $DIR/feature-gate-extended_varargs_abi_support.rs:3:14
   |
LL | fn efiapi(f: extern "efiapi" fn(usize, ...)) {
   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: see issue #100189 <https://github.com/rust-lang/rust/issues/100189> for more information
   = help: add `#![feature(extended_varargs_abi_support)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date

error[E0658]: C-variadic functions with the "sysv64" calling convention are unstable
  --> $DIR/feature-gate-extended_varargs_abi_support.rs:7:12
   |
LL | fn sysv(f: extern "sysv64" fn(usize, ...)) {
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: see issue #100189 <https://github.com/rust-lang/rust/issues/100189> for more information
   = help: add `#![feature(extended_varargs_abi_support)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date

error[E0658]: C-variadic functions with the "win64" calling convention are unstable
  --> $DIR/feature-gate-extended_varargs_abi_support.rs:11:11
   |
LL | fn win(f: extern "win64" fn(usize, ...)) {
   |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: see issue #100189 <https://github.com/rust-lang/rust/issues/100189> for more information
   = help: add `#![feature(extended_varargs_abi_support)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0658`.