initial commit

build.rs

@@ -0,0 +1,57 @@
+use make_cmd;
+use std::env;
+use std::path::{Path, PathBuf};
+
+fn main() {
+    // This is the directory where the `c` library is located.
+    let libdir_path = PathBuf::from("mlkem-native/mlkem")
+        // 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("mlkem_native.h");
+    let headers_path_str = headers_path.to_str().expect("Path is not a valid string");
+
+    // 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=mlkem-native/test/build");
+
+    let mlkem_native_path = PathBuf::from("mlkem-native")
+        .canonicalize()
+        .expect("cannot canonicalize path");
+    if !make_cmd::make()
+        .current_dir(mlkem_native_path)
+        .output()
+        .expect("could not compile mlkem-native")
+        .status
+        .success()
+    {
+        panic!("could not compile mlkem-native");
+    }
+
+    // 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!");
+}