bearssl-rs/bearssl-sys/build.rs

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Rust
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use std::env;
use std::path::PathBuf;
#[cfg(not(feature = "bundled"))]
static HEADER_PATH: &str = "wrapper.h";
#[cfg(feature = "bundled")]
static HEADER_PATH: &str = "bundled/inc/bearssl.h";
#[cfg(not(feature = "bundled"))]
fn bearssl_handle_linkage() {
#[cfg(not(unix))]
panic!("linking dynamically is currently supported in only unix targets");
println!("cargo:rustc-link-search=/lib");
println!("cargo:rustc-link-search=/usr/lib");
println!("cargo:rustc-link-search=/usr/local/lib");
println!("cargo:rustc-link-lib=dylib=bearssl");
}
#[cfg(feature = "bundled")]
#[cfg(target_arch = "x86_64")]
fn build_configure_arch_specific(build: &mut cc::Build) {
let compiler = build.get_compiler();
build.define("BR_64", "1");
if compiler.is_like_gnu() || compiler.is_like_clang() {
build.define("BR_INT128", "1");
} else if compiler.is_like_msvc() {
build.define("BR_UMUL128", "1");
}
#[cfg(target_feature = "sse2")]
build.define("BR_SSE2", "1");
#[cfg(target_feature = "aes")]
build.define("BR_AES_X86NI", "1");
}
#[cfg(feature = "bundled")]
#[cfg(not(target_arch = "x86_64"))]
fn build_configure_arch_specific(build: &mut cc::Build) {
#[cfg(target_pointer_width = 64)]
build.define("BR_64", "1");
}
#[cfg(feature = "bundled")]
#[cfg(unix)]
fn build_configure_os_specific(build: &mut cc::Build) {
build.define("BR_USE_UNIX_TIME", "1").define("BR_USE_URANDOM", "1");
}
#[cfg(feature = "bundled")]
#[cfg(windows)]
fn build_configure_os_specific(build: &mut cc::Build) {
build.define("BR_USE_WIN32_RAND", "1").define("BR_USE_WIN32_TIME", "1");
}
#[cfg(feature = "bundled")]
fn bearssl_handle_linkage() {
let mut build = cc::Build::new();
build_configure_os_specific(&mut build);
build_configure_arch_specific(&mut build);
build
.include("bundled/inc")
.files(
std::fs::read_dir("bundled/src")
.expect("failed to get bundled source path")
.map(|e| e.expect("failed to read get file entry").path()),
)
.static_flag(true)
.compile("bearssl");
println!("cargo:lib_dir={}", env::var("OUT_DIR").unwrap());
println!("cargo:rustc-link-lib=static=bearssl");
}
fn main() {
bearssl_handle_linkage();
let bindings = bindgen::builder()
.use_core()
.ctypes_prefix("::libc")
.header(HEADER_PATH)
.default_macro_constant_type(bindgen::MacroTypeVariation::Signed)
.parse_callbacks(Box::new(bindgen::CargoCallbacks))
.allowlist_type("(br|BR)_.*")
.allowlist_var("(br|BR)_.*")
.allowlist_function("(br|BR)_.*")
.blocklist_type("__.*_t")
.blocklist_type("size_t")
.generate()
.expect("Unable to generate bindings");
let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
bindings
.write_to_file(out_path.join("bindings.rs"))
.expect("Couldn't write bindings!");
}