EMU-TLS

For versions of LLVM 15 and above, emu-tls related symbols have been moved into libc++.so and libclang_rt.builtins.a files. Therefore, if you encounter errors similar to the ones below, please link to the relevant dynamic or static library.

Error

__emutls_get_address: symbol not found

How to solve it?

// build.rs

fn main() {
    println!("cargo:rustc-link-lib=c++");
    // or
    // println!("cargo:rustc-link-lib=static=clang_rt.builtins");
}

x86_64

When dealing with the x86_64 architecture, we might encounter an error like the one below.

Add .cargo/config.toml file in your project, and add some code.

[unstable]
build-std-features = ["compiler-builtins-weak-intrinsics"]