notcurses/rust/build/build.rs
2021-07-20 14:07:47 -04:00

96 lines
3.4 KiB
Rust

extern crate bindgen;
extern crate pkg_config;
use std::env;
use std::path::PathBuf;
// largely taken from https://rust-lang.github.io/rust-bindgen/tutorial-3.html
fn main() {
let plib = pkg_config::Config::new()
.atleast_version("2.3.11")
.probe("notcurses")
.unwrap();
// Tell cargo to invalidate the built crate whenever the wrapper changes
println!("cargo:rerun-if-changed=build/wrapper.h");
// The bindgen::Builder is the main entry point to bindgen, and lets you
// build up options for the resulting bindings.
//
// https://docs.rs/bindgen/*/bindgen/struct.Builder.html
//
// allow .blacklist_function instead of .blocklist_function for now,
// until we update bindgen to >= 0.58.
#[allow(deprecated)]
let mut builder = bindgen::Builder::default()
.use_core()
.ctypes_prefix("cty")
.clang_arg("-D_XOPEN_SOURCE")
// The input header we would like to generate builder for.
.header("build/wrapper.h")
// generate comments, also from headers and not just doc comments (///)
.generate_comments(true)
.clang_arg("-fretain-comments-from-system-headers")
.clang_arg("-fparse-all-comments")
// Remove warnings about improper_ctypes
.blacklist_function("strtold")
.blacklist_function("wcstold")
.blacklist_function("socketpair")
// only import functions from notcurses public API
.blacklist_function("[^ns].*")
.blacklist_function("n[^co].*")
.blacklist_function("s[^i].*") // allow sig*
// clean more unneeded types
.blacklist_item("_BITS.*")
.blacklist_item("_POSIX.*")
.blacklist_item("__[A-Z].*")
.blacklist_item("[ADHJ-MQ-Z].*")
.blacklist_item("IP[^R].*")
.blacklist_item("PF.*")
.blacklist_item("MSG_.*")
.blacklist_item("N[^C].*")
.blacklist_type("_bindgen.*")
// https://github.com/dankamongmen/notcurses/pull/1937
// https://github.com/rust-lang/rust-bindgen/issues/1651
.layout_tests(false)
// Don't derive the Copy trait on types with destructors.
.no_copy("ncdirect")
.no_copy("ncdplot")
.no_copy("ncfdplane")
.no_copy("ncmenu")
.no_copy("ncmultiselector")
.no_copy("ncplane")
.no_copy("ncreader")
.no_copy("ncreel")
.no_copy("ncselector")
.no_copy("ncuplot")
.no_copy("ncvisual")
.no_copy("notcurses")
// try to derive more traits
.derive_default(true)
.derive_hash(true)
.derive_partialord(true)
.derive_ord(true)
.derive_partialeq(true)
.derive_eq(true)
// Tell cargo to invalidate the built crate whenever any of the
// included header files changed.
.parse_callbacks(Box::new(bindgen::CargoCallbacks));
for d in plib.include_paths {
builder = builder.clang_arg(format!("-I{}", d.to_string_lossy()));
}
// Finish the builder and generate the builder.
let bindings = builder
.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());
bindings
.write_to_file(out_path.join("bindings.rs"))
.expect("Couldn't write bindings!");
}