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extern crate bindgen;
use std::env;
use std::path::PathBuf;
fn main() {
if std::env::var("DOCS_RS").is_ok() {
return;
}
println!("cargo:rerun-if-changed=wrapper.h");
println!("cargo:rerun-if-changed=src/generated.rs");
let linuxcnc_root = env::var("LINUXCNC_SRC").expect("LINUXCNC_SRC env var must be set and pointing to the root of the LinuxCNC source Git repository");
let bindings = bindgen::Builder::default()
// The input header we would like to generate
// bindings for.
.header("wrapper.h")
.clang_arg(&format!("-I{}", linuxcnc_root))
.clang_arg(&format!("-I{}/src/hal", linuxcnc_root))
.clang_arg(&format!("-I{}/src/rtapi", linuxcnc_root))
// Tell LinuxCNC build to run in realtime mode with `-DRTAPI` or non-realtime with `-DULAPI`.
// See line ~114 in linuxcnc-src/src/hal/hal.h
.clang_arg("-DRTAPI")
// .clang_arg("-DULAPI")
// Tell cargo to 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.rs file.
// let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
let out_path = PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("src");
bindings
.write_to_file(out_path.join("generated.rs"))
.expect("Couldn't write bindings!");
// Dynamically link LinuxCNC HAL, as per <https://github.com/rust-lang/rust-bindgen/issues/1974>
// and <https://doc.rust-lang.org/cargo/reference/build-scripts.html#rustc-link-lib>
println!("cargo:rustc-link-search=native={linuxcnc_root}/lib");
println!("cargo:rustc-link-lib=dylib=linuxcnchal");
// From
// <https://stackoverflow.com/questions/40602708/linking-rust-application-with-a-dynamic-library-not-in-the-runtime-linker-search>
println!("cargo:rustc-link-arg=-Wl,-rpath,{linuxcnc_root}/lib");
}