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 compiler/rustc_codegen_llvm/src/intrinsic.rs and in
library/core/src/intrinsics.rs in the Rust source code. Example:
#![feature(intrinsics)]
extern "rust-intrinsic" {
fn atomic_fence_seqcst(); // ok!
}
fn main() {
unsafe {
atomic_fence_seqcst();
}
}