mirror of https://github.com/rust-lang/rust
36 lines
1.4 KiB
Plaintext
36 lines
1.4 KiB
Plaintext
warning: `extern` fn uses type `str`, which is not FFI-safe
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--> $DIR/extern-C-str-arg-ice-80125.rs:3:23
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LL | type ExternCallback = extern "C" fn(*const u8, u32, str);
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
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= help: consider using `*const u8` and a length instead
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= note: string slices have no C equivalent
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= note: `#[warn(improper_ctypes_definitions)]` on by default
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warning: `extern` fn uses type `str`, which is not FFI-safe
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--> $DIR/extern-C-str-arg-ice-80125.rs:9:44
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LL | pub extern "C" fn register_something(bind: ExternCallback) -> Struct {
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| ^^^^^^^^^^^^^^ not FFI-safe
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= help: consider using `*const u8` and a length instead
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= note: string slices have no C equivalent
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warning: `extern` fn uses type `Struct`, which is not FFI-safe
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--> $DIR/extern-C-str-arg-ice-80125.rs:9:63
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LL | pub extern "C" fn register_something(bind: ExternCallback) -> Struct {
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| ^^^^^^ not FFI-safe
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= help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
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= note: this struct has unspecified layout
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note: the type is defined here
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--> $DIR/extern-C-str-arg-ice-80125.rs:6:1
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LL | pub struct Struct(ExternCallback);
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| ^^^^^^^^^^^^^^^^^
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warning: 3 warnings emitted
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