Graham MacDonald
71 lines
2.3 KiB
Rust
71 lines
2.3 KiB
Rust
extern crate cbindgen;
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extern crate cc;
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use std::{env, fs, fs::DirEntry, path::Path};
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// include src/header directories that don't start with '_'
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fn include_dir(d: &DirEntry) -> bool {
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d.metadata().map(|m| m.is_dir()).unwrap_or(false)
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&& d.path()
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.iter()
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.nth(2)
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.map_or(false, |c| c.to_str().map_or(false, |x| !x.starts_with("_")))
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}
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fn generate_bindings(cbindgen_config_path: &Path) {
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let relative_path = cbindgen_config_path
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.strip_prefix("src/header")
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.ok()
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.and_then(|p| p.parent())
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.and_then(|p| p.to_str())
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.unwrap()
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.replace("_", "/");
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let header_path = Path::new("target/include")
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.join(&relative_path)
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.with_extension("h");
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let mod_path = cbindgen_config_path.with_file_name("mod.rs");
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let config = cbindgen::Config::from_file(cbindgen_config_path).unwrap();
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cbindgen::Builder::new()
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.with_config(config)
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.with_src(mod_path)
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.generate()
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.expect("Unable to generate bindings")
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.write_to_file(header_path);
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}
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fn main() {
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let crate_dir = env::var("CARGO_MANIFEST_DIR").expect("CARGO_MANIFEST_DIR not set");
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// Generate C includes
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// - based on contents of src/header/**
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// - headers written to target/include
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fs::read_dir(&Path::new("src/header"))
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.unwrap()
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.into_iter()
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.filter_map(Result::ok)
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.filter(|d| include_dir(d))
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.map(|d| d.path().as_path().join("cbindgen.toml"))
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.filter(|p| p.exists())
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.for_each(|p| {
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println!("cargo:rerun-if-changed={:?}", p.parent().unwrap());
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println!("cargo:rerun-if-changed={:?}", p);
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println!("cargo:rerun-if-changed={:?}", p.with_file_name("mod.rs"));
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generate_bindings(&p);
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});
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cc::Build::new()
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.flag("-nostdinc")
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.flag("-nostdlib")
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.include(&format!("{}/include", crate_dir))
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.flag("-fno-stack-protector")
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.flag("-Wno-expansion-to-defined")
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.files(
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fs::read_dir("src/c")
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.expect("src/c directory missing")
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.map(|res| res.expect("read_dir error").path()),
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)
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.compile("relibc_c");
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println!("cargo:rustc-link-lib=static=relibc_c");
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}
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