error[E0045]: C-variadic function must have C or cdecl calling convention --> $DIR/variadic-ffi-1.rs:9:5 | LL | fn printf(_: *const u8, ...); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ C-variadics require C or cdecl calling convention error[E0060]: this function takes at least 2 arguments but 0 arguments were supplied --> $DIR/variadic-ffi-1.rs:20:9 | LL | foo(); | ^^^-- two arguments of type `isize` and `u8` are missing | note: function defined here --> $DIR/variadic-ffi-1.rs:13:8 | LL | fn foo(f: isize, x: u8, ...); | ^^^ help: provide the arguments | LL | foo(/* isize */, /* u8 */); | ~~~~~~~~~~~~~~~~~~~~~~~~~~ error[E0060]: this function takes at least 2 arguments but 1 argument was supplied --> $DIR/variadic-ffi-1.rs:21:9 | LL | foo(1); | ^^^--- an argument of type `u8` is missing | note: function defined here --> $DIR/variadic-ffi-1.rs:13:8 | LL | fn foo(f: isize, x: u8, ...); | ^^^ help: provide the argument | LL | foo(1, /* u8 */); | ~~~~~~~~~~~~~~~~ error[E0308]: mismatched types --> $DIR/variadic-ffi-1.rs:23:56 | LL | let x: unsafe extern "C" fn(f: isize, x: u8) = foo; | ------------------------------------- ^^^ expected non-variadic fn, found variadic function | | | expected due to this | = note: expected fn pointer `unsafe extern "C" fn(_, _)` found fn item `unsafe extern "C" fn(_, _, ...) {foo}` error[E0308]: mismatched types --> $DIR/variadic-ffi-1.rs:24:54 | LL | let y: extern "C" fn(f: isize, x: u8, ...) = bar; | ----------------------------------- ^^^ expected variadic fn, found non-variadic function | | | expected due to this | = note: expected fn pointer `extern "C" fn(_, _, ...)` found fn item `extern "C" fn(_, _) {bar}` error[E0617]: can't pass `f32` to variadic function --> $DIR/variadic-ffi-1.rs:26:19 | LL | foo(1, 2, 3f32); | ^^^^ help: cast the value to `c_double`: `3f32 as c_double` error[E0617]: can't pass `bool` to variadic function --> $DIR/variadic-ffi-1.rs:27:19 | LL | foo(1, 2, true); | ^^^^ help: cast the value to `c_int`: `true as c_int` error[E0617]: can't pass `i8` to variadic function --> $DIR/variadic-ffi-1.rs:28:19 | LL | foo(1, 2, 1i8); | ^^^ help: cast the value to `c_int`: `1i8 as c_int` error[E0617]: can't pass `u8` to variadic function --> $DIR/variadic-ffi-1.rs:29:19 | LL | foo(1, 2, 1u8); | ^^^ help: cast the value to `c_uint`: `1u8 as c_uint` error[E0617]: can't pass `i16` to variadic function --> $DIR/variadic-ffi-1.rs:30:19 | LL | foo(1, 2, 1i16); | ^^^^ help: cast the value to `c_int`: `1i16 as c_int` error[E0617]: can't pass `u16` to variadic function --> $DIR/variadic-ffi-1.rs:31:19 | LL | foo(1, 2, 1u16); | ^^^^ help: cast the value to `c_uint`: `1u16 as c_uint` error: aborting due to 11 previous errors Some errors have detailed explanations: E0045, E0060, E0308, E0617. For more information about an error, try `rustc --explain E0045`.