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// SPDX-License-Identifier: Apache-2.0↩
↩
//! Finds `libclang` static or shared libraries and links to them.↩
//!↩
//! # Environment Variables↩
//!↩
//! This build script can make use of several environment variables to help it↩
//! find the required static or shared libraries.↩
//!↩
//! * `LLVM_CONFIG_PATH` - provides a path to an `llvm-config` executable↩
//! * `LIBCLANG_PATH` - provides a path to a directory containing a `libclang`↩
//! shared library or a path to a specific `libclang` shared library↩
//! * `LIBCLANG_STATIC_PATH` - provides a path to a directory containing LLVM↩
//! and Clang static libraries↩
↩
#![allow(unused_attributes)]↩
↩
extern crate glob;↩
↩
use std::path::Path;↩
↩
#[macro_use]↩
#[path = "build/macros.rs"]↩
pub mod macros;↩
↩
#[path = "build/common.rs"]↩
pub mod common;↩
#[path = "build/dynamic.rs"]↩
pub mod dynamic;↩
#[path = "build/static.rs"]↩
pub mod r#static;↩
↩
/// Copies a file.↩
#[cfg(feature = "runtime")]↩
fn copy(source: &str, destination: &Path) {↩
use std::fs::File;↩
use std::io::{Read, Write};↩
↩
let mut string = String::new();↩
File::open(source)↩
.unwrap()↩
.read_to_string(&mut string)↩
.unwrap();↩
File::create(destination)↩
.unwrap()↩
.write_all(string.as_bytes())↩
.unwrap();↩
}↩
↩
/// Copies the code used to find and link to `libclang` shared libraries into↩
/// the build output directory so that it may be used when linking at runtime.↩
#[cfg(feature = "runtime")]↩
fn main() {↩
use std::env;↩
↩
if cfg!(feature = "static") {↩
panic!("`runtime` and `static` features can't be combined");↩
}↩
↩
let out = env::var("OUT_DIR").unwrap();↩
copy("build/macros.rs", &Path::new(&out).join("macros.rs"));↩
copy("build/common.rs", &Path::new(&out).join("common.rs"));↩
copy("build/dynamic.rs", &Path::new(&out).join("dynamic.rs"));↩
}↩
↩
/// Finds and links to the required libraries dynamically or statically.↩
#[cfg(not(feature = "runtime"))]↩
fn main() {↩
if cfg!(feature = "static") {↩
r#static::link();↩
} else {↩
dynamic::link();↩
}↩
↩
if let Some(output) = common::run_llvm_config(&["--includedir"]) {↩
let directory = Path::new(output.trim_end());↩
println!("cargo:include={}", directory.display());↩
}↩
}↩