From 2cc2cb78ac83ab4c20b6b493e6cf242701899110 Mon Sep 17 00:00:00 2001 From: Corbin Crutchley Date: Tue, 27 Jan 2026 23:27:04 -0800 Subject: [PATCH] chore: initial add bindgen --- Cargo.lock | 221 +++++++++++++++++++++++++++++++++++++++++++++++ Cargo.toml | 3 + build.rs | 79 +++++++++++++++++ hello/.gitignore | 2 + hello/hello.c | 3 + hello/hello.h | 1 + src/lib.rs | 5 ++ src/main.rs | 4 +- 8 files changed, 317 insertions(+), 1 deletion(-) create mode 100644 build.rs create mode 100644 hello/.gitignore create mode 100644 hello/hello.c create mode 100644 hello/hello.h create mode 100644 src/lib.rs diff --git a/Cargo.lock b/Cargo.lock index 847484a..23242bd 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -2,6 +2,227 @@ # It is not intended for manual editing. version = 4 +[[package]] +name = "aho-corasick" +version = "1.1.4" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "ddd31a130427c27518df266943a5308ed92d4b226cc639f5a8f1002816174301" +dependencies = [ + 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--- a/Cargo.toml +++ b/Cargo.toml @@ -4,3 +4,6 @@ version = "0.1.0" edition = "2024" [dependencies] + +[build-dependencies] +bindgen = "0.72.1" \ No newline at end of file diff --git a/build.rs b/build.rs new file mode 100644 index 0000000..3affed4 --- /dev/null +++ b/build.rs @@ -0,0 +1,79 @@ +use std::env; +use std::path::PathBuf; + +fn main() { + // This is the directory where the `c` library is located. + let libdir_path = PathBuf::from("hello") + // Canonicalize the path as `rustc-link-search` requires an absolute + // path. + .canonicalize() + .expect("cannot canonicalize path"); + + // This is the path to the `c` headers file. + let headers_path = libdir_path.join("hello.h"); + let headers_path_str = headers_path.to_str().expect("Path is not a valid string"); + + // This is the path to the intermediate object file for our library. + let obj_path = libdir_path.join("hello.o"); + // This is the path to the static library file. + let lib_path = libdir_path.join("libhello.a"); + + // Tell cargo to look for shared libraries in the specified directory + println!("cargo:rustc-link-search={}", libdir_path.to_str().unwrap()); + + // Tell cargo to tell rustc to link our `hello` library. Cargo will + // automatically know it must look for a `libhello.a` file. + println!("cargo:rustc-link-lib=hello"); + + // Run `clang` to compile the `hello.c` file into a `hello.o` object file. + // Unwrap if it is not possible to spawn the process. + if !std::process::Command::new("clang") + .arg("-c") + .arg("-o") + .arg(&obj_path) + .arg(libdir_path.join("hello.c")) + .output() + .expect("could not spawn `clang`") + .status + .success() + { + // Panic if the command was not successful. + panic!("could not compile object file"); + } + + // Run `ar` to generate the `libhello.a` file from the `hello.o` file. + // Unwrap if it is not possible to spawn the process. + if !std::process::Command::new("ar") + .arg("rcs") + .arg(lib_path) + .arg(obj_path) + .output() + .expect("could not spawn `ar`") + .status + .success() + { + // Panic if the command was not successful. + panic!("could not emit library file"); + } + + // The bindgen::Builder is the main entry point + // to bindgen, and lets you build up options for + // the resulting bindings. + let bindings = bindgen::Builder::default() + // The input header we would like to generate + // bindings for. + .header(headers_path_str) + // Tell cargo to invalidate the built crate whenever any of the + // included header files changed. + .parse_callbacks(Box::new(bindgen::CargoCallbacks::new())) + // Finish the builder and generate the bindings. + .generate() + // Unwrap the Result and panic on failure. + .expect("Unable to generate bindings"); + + // Write the bindings to the $OUT_DIR/bindings.rs file. + let out_path = PathBuf::from(env::var("OUT_DIR").unwrap()).join("bindings.rs"); + bindings + .write_to_file(out_path) + .expect("Couldn't write bindings!"); +} \ No newline at end of file diff --git a/hello/.gitignore b/hello/.gitignore new file mode 100644 index 0000000..151a620 --- /dev/null +++ b/hello/.gitignore @@ -0,0 +1,2 @@ +*.o +*.a \ No newline at end of file diff --git a/hello/hello.c b/hello/hello.c new file mode 100644 index 0000000..a7e61c7 --- /dev/null +++ b/hello/hello.c @@ -0,0 +1,3 @@ +int hello() { + return 42; +} diff --git a/hello/hello.h b/hello/hello.h new file mode 100644 index 0000000..e8035e8 --- /dev/null +++ b/hello/hello.h @@ -0,0 +1 @@ +int hello(); diff --git a/src/lib.rs b/src/lib.rs new file mode 100644 index 0000000..428a22c --- /dev/null +++ b/src/lib.rs @@ -0,0 +1,5 @@ +#![allow(non_upper_case_globals)] +#![allow(non_camel_case_types)] +#![allow(non_snake_case)] + +include!(concat!(env!("OUT_DIR"), "/bindings.rs")); \ No newline at end of file diff --git a/src/main.rs b/src/main.rs index e7a11a9..c638f22 100644 --- a/src/main.rs +++ b/src/main.rs @@ -1,3 +1,5 @@ +use rust_multi_os_template::hello; + fn main() { - println!("Hello, world!"); + println!("Hello, world!{}", unsafe {hello()}.to_string()); } -- 2.51.2