tthresh-sys 0.1.0

Low-level Rust bindings to the tthresh compressor
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82

#![expect(missing_docs)]
#![expect(clippy::expect_used)]

// Adapted from sz3-sys's build script by Robin Ole Heinemann, licensed under GPL-3.0-only.

use std::{
    env,
    path::{Path, PathBuf},
};

fn main() {
    // use cmake to configure (but not compile) the tthresh build
    let mut config = cmake::Config::new("tthresh");
    config.define("BUILD_SHARED_LIBS", "OFF");
    config.define("BUILD_TESTING", "OFF");
    config.build_arg("--version");

    println!("cargo::rerun-if-changed=lib.cpp");
    println!("cargo::rerun-if-changed=wrapper.hpp");
    println!("cargo::rerun-if-changed=tthresh");

    let cargo_callbacks = bindgen::CargoCallbacks::new();
    let bindings = bindgen::Builder::default()
        .clang_arg("-x")
        .clang_arg("c++")
        .clang_arg("-std=c++11")
        .clang_arg(format!("-I{}", Path::new("tthresh").join("src").display()))
        .clang_arg(format!(
            "-I{}",
            Path::new("tthresh").join("external").display()
        ))
        .header("wrapper.hpp")
        .parse_callbacks(Box::new(cargo_callbacks))
        .allowlist_function("compress_buffer")
        .allowlist_function("decompress_buffer")
        // MSRV 1.82
        .rust_target(match bindgen::RustTarget::stable(82, 0) {
            Ok(target) => target,
            #[expect(clippy::panic)]
            Err(err) => panic!("{err}"),
        })
        .generate()
        .expect("Unable to generate bindings");

    let out_path =
        PathBuf::from(env::var("OUT_DIR").expect("OUT_DIR should be set in a build script"));
    bindings
        .write_to_file(out_path.join("bindings.rs"))
        .expect("Couldn't write bindings!");

    let mut build = cc::Build::new();

    build
        .cpp(true)
        .std("c++11")
        .include(Path::new("tthresh").join("src"))
        .include(Path::new("tthresh").join("external"))
        .file("lib.cpp")
        .warnings(false);

    if cfg!(feature = "openmp") {
        env::var("DEP_OPENMP_FLAG") // set by openmp-sys
            .expect("DEP_OPENMP_FLAG should be set when compiling with openmp-sys")
            .split(' ')
            .for_each(|f| {
                build.flag(f);
            });
    }

    build.compile("tthresh");

    if cfg!(feature = "openmp") {
        if let Some(link) = env::var_os("DEP_OPENMP_CARGO_LINK_INSTRUCTIONS") {
            for i in env::split_paths(&link) {
                if i.as_os_str().is_empty() {
                    continue;
                }
                println!("cargo::{}", i.display());
            }
        }
    }
}