An unknown intrinsic function was declared.
Erroneous code example:
#![feature(intrinsics)] extern "rust-intrinsic" { fn foo(); // error: unrecognized intrinsic function: `foo` } fn main() { unsafe { foo(); } }
Please check you didn‘t make a mistake in the function’s name. All intrinsic functions are defined in librustc_codegen_llvm/intrinsic.rs
and in libcore/intrinsics.rs
in the Rust source code. Example:
#![feature(intrinsics)] extern "rust-intrinsic" { fn atomic_fence(); // ok! } fn main() { unsafe { atomic_fence(); } }