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//! WFA bindings for rust using Bindgen.
//!
//! First, add `bindgen` to your dependencies:
//! ```toml
//! [build-dependencies]
//! bindgen = "0.60.1"
//! ```
//!
//! Then save this file as `build.rs` in the root of your crate.
//! Update the paths below to match your WFA installation/repository.
//!
//! The example has the WFA2-lib repository cloned in `../wfa2`.
//! Make sure to run `make lib_wfa` in the WFA repository.
//! The code below will tell cargo to link against `../wfa2/lib/libwfa.a`.
//!
//! The bindings will be writted to a special `OUT_DIR` set by cargo. See
//! `example.rs` for an example of how to include and use the generated
//! bindings.
extern crate bindgen;
use std::env;
use std::path::PathBuf;
fn wfa() {
// 1. Link instructions for Cargo.
// The directory of the WFA libraries, added to the search path.
println!("cargo:rustc-link-search=../wfa2/lib");
// Link the `wfa-lib` library.
println!("cargo:rustc-link-lib=wfa");
// Also link `omp`.
println!("cargo:rustc-link-lib=omp");
// Invalidate the built crate whenever the linked library changes.
println!("cargo:rerun-if-changed=../wfa2/lib/libwfa.a");
// 2. Generate bindings.
let bindings = bindgen::Builder::default()
// Generate bindings for this header file.
.header("../wfa2/wavefront/wavefront_align.h")
// Add this directory to the include path to find included header files.
.clang_arg("-I../wfa2")
// Generate bindings for all functions starting with `wavefront_`.
.allowlist_function("wavefront_.*")
// Generate bindings for all variables starting with `wavefront_`.
.allowlist_var("wavefront_.*")
// Invalidate the built crate whenever any of the included header files
// changed.
.parse_callbacks(Box::new(bindgen::CargoCallbacks))
// 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_wfa.rs file.
let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
bindings
.write_to_file(out_path.join("bindings_wfa.rs"))
.expect("Couldn't write bindings!");
}
fn main() {
wfa();
}
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