extern crate cc;
use std::error::Error;
use std::path::PathBuf;
use std::{env, fs, process};
fn main() {
match run() {
Ok(()) => (),
Err(err) => {
eprintln!("{}", err);
process::exit(1);
}
}
}
#[allow(clippy::single_match)]
fn run() -> Result<(), Box<dyn Error>> {
let mut compiler = cc::Build::new();
compiler
.file("liblz4/lib/lz4.c")
.file("liblz4/lib/lz4hc.c")
.opt_level(3);
match env::var("TARGET")
.map_err(|err| format!("reading TARGET environment variable: {}", err))?
.as_str()
{
"i686-pc-windows-gnu" => {
compiler.flag("-fno-tree-vectorize");
}
_ => {}
}
compiler.compile("liblz4.a");
let src = env::current_dir()?.join("liblz4").join("lib");
let dst = PathBuf::from(env::var_os("OUT_DIR").ok_or("missing OUT_DIR environment variable")?);
let include = dst.join("include");
fs::create_dir_all(&include)
.map_err(|err| format!("creating directory {}: {}", include.display(), err))?;
for e in fs::read_dir(&src)? {
let e = e?;
let utf8_file_name = e
.file_name()
.into_string()
.map_err(|_| format!("unable to convert file name {:?} to UTF-8", e.file_name()))?;
if utf8_file_name.ends_with(".h") {
let from = e.path();
let to = include.join(e.file_name());
fs::copy(&from, &to).map_err(|err| {
format!("copying {} to {}: {}", from.display(), to.display(), err)
})?;
}
}
println!("cargo:root={}", dst.display());
Ok(())
}