使用带有Rust的.c源文件

Question

是否有标准的方法来包含.c源文件？

到目前为止,我一直在使用extern "C" { ... }公开函数,将.c编译为目标文件,运行rustc直到ld chokes与未定义的引用,并使用后面显示的参数error: linking with 'cc' failed with code 1; note: cc arguments: ...运行cc myobjfile.o ...

Answer 1

编者注:此答案早于Rust 1.0,不再适用.

Luqman暗示了IRC; 在箱子文件中使用extern "C" { ... }with #[link_args="src/source.c"];对我有用.

Answer 2

在构建脚本中使用cc crate将 C 文件编译为静态库，然后将静态库链接到您的 Rust 程序：

Cargo.toml

[package]
name = "calling-c"
version = "0.1.0"
authors = ["An Devloper <an.devloper@example.com>"]
edition = "2018"

[build-dependencies]
cc = "1.0.28"

构建.rs

use cc;

fn main() {
    cc::Build::new()
        .file("src/example.c")
        .compile("foo");
}

源代码/示例.c

[package]
name = "calling-c"
version = "0.1.0"
authors = ["An Devloper <an.devloper@example.com>"]
edition = "2018"

[build-dependencies]
cc = "1.0.28"

src/main.rs

extern "C" {
    fn testing(x: u8) -> u8;
}

fn main() {
    let a = unsafe { testing(21) };
    println!("a = {}", a);
}