Rust 调用C/C++

需要引入cc依赖

Cargo.toml

[package]
name = "rust-call-c"
version = "0.1.0"
authors = ["ice <bsqql123@163.com>"]

build = "build.rs"

[dependencies]
libc = "0.2"

[build-dependencies]
cc = "1.0"

build.rs

extern crate cc;

fn main() {
    cc::Build::new()
        .file("src/double.c")
        .compile("libdouble.a");
}

main.rs

extern crate libc;

extern {
    fn double_input(input: libc::c_int) -> libc::c_int;
}

//TODO
fn main() {
    let input = 4;
    let output = unsafe { double_input(input) };
    println!("{} * 2 = {}", input, output);
}

double.c

int double_input(int input) {
    return input * 2;
}

具体例子在
https://github.com/iceqing/rust-call-c

这里是一个比较完整的例子，有各种语言的示例代码
https://github.com/iceqing/rust-ffi-examples