57 lines
1.7 KiB
Rust
57 lines
1.7 KiB
Rust
use 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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// Tell cargo to invalidate the built crate whenever the wrapper changes
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println!("cargo:rerun-if-changed=include/nix-c-raw.h");
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// https://rust-lang.github.io/rust-bindgen/library-usage.html
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let bindings = bindgen::Builder::default()
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.header("include/nix-c-raw.h")
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// Find the includes
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.clang_args(c_headers())
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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());
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bindings
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.write_to_file(out_path.join("bindings.rs"))
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.expect("Couldn't write bindings!");
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}
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fn c_headers() -> Vec<String> {
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let mut args = Vec::new();
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// args.push("-isystem".to_string());
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for path in pkg_config::probe_library("nix-expr-c")
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.unwrap()
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.include_paths
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.iter()
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{
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args.push(format!("-I{}", path.to_str().unwrap()));
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}
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for path in pkg_config::probe_library("bdw-gc")
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.unwrap()
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.include_paths
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.iter()
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{
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args.push(format!("-I{}", path.to_str().unwrap()));
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}
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if let Ok(cflags) = std::env::var("RUST_NIX_C_RAW_EXTRA_CFLAGS") {
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for flag in cflags.split_whitespace() {
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args.push(flag.to_string());
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}
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}
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// write to stderr for debugging
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eprintln!("c_headers: {:?}", args);
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args
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}
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