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78 lines
2.5 KiB
Rust
78 lines
2.5 KiB
Rust
extern crate bindgen;
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use std::env;
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use std::path::PathBuf;
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fn main() {
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let opt_level = env::var("OPT_LEVEL").unwrap();
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let define_debug = if env::var("CARGO_FEATURE_DEBUG_PRINTS").is_ok() {
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"-DDEBUG"
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} else {
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"-UDEBUG"
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};
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// This is the directory where the `c` library is located.
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let libdir_path = PathBuf::from("c-src")
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// Canonicalize the path as `rustc-link-search` requires an absolute
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// path.
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.canonicalize()
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.expect("cannot canonicalize path");
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let libdir_path_str = libdir_path.to_str().expect("Path is not a valid string");
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// This is the path to the `c` headers file.
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let headers_path = libdir_path.join("wrapper.h");
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let headers_path_str = headers_path.to_str().expect("Path is not a valid string");
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println!("cargo:rerun-if-changed={}", libdir_path_str);
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let res = cc::Build::new()
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.file(
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libdir_path
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.join("guard.c")
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.to_str()
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.expect("Path is not a valid string"),
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)
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.flag(format!("-O{}", opt_level).as_ref())
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.flag(define_debug)
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.flag("-g3")
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.flag("-Wall")
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.flag("-Wextra")
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.flag("-Wformat=2")
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.flag("-Wmissing-include-dirs")
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.flag("-Wnested-externs")
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.flag("-Wpedantic")
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.flag("-Wredundant-decls")
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.flag("-Wshadow")
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.flag("-Wwrite-strings")
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.flag("-Wno-unused-parameter")
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.flag("-Wno-pointer-arith")
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.flag("-Wno-strict-prototypes")
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.flag("-Wno-unused-function")
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.try_compile("guard");
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if let Err(err) = res {
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panic!("{}", err);
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}
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// The bindgen::Builder is the main entry point
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// to bindgen, and lets you build up options for
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// the resulting bindings.
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let bindings = bindgen::Builder::default()
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// The input header we would like to generate
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// bindings for.
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.header(headers_path_str)
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// Tell cargo to invalidate the built crate whenever any of the
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// included header files changed.
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.parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
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// Finish the builder and generate the bindings.
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.generate()
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// Unwrap the Result and panic on failure.
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.expect("Unable to generate bindings");
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// Write the bindings to the $OUT_DIR/bindings.rs file.
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let out_path = PathBuf::from(env::var("OUT_DIR").unwrap()).join("bindings.rs");
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bindings
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.write_to_file(out_path)
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.expect("Couldn't write bindings!");
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}
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