File: build.rs

package info (click to toggle)
firefox-esr 78.15.0esr-1~deb11u1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 3,301,156 kB
  • sloc: cpp: 5,665,905; javascript: 4,798,386; ansic: 2,878,233; python: 977,004; asm: 270,347; xml: 181,456; java: 111,756; sh: 72,926; makefile: 21,819; perl: 13,380; cs: 4,725; yacc: 4,565; objc: 3,026; pascal: 1,787; lex: 1,720; ada: 1,681; exp: 505; php: 436; lisp: 260; awk: 152; ruby: 103; csh: 80; sed: 53; sql: 45
file content (35 lines) | stat: -rw-r--r-- 929 bytes parent folder | download | duplicates (45) 
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
 
use std::env;
use std::io::Write;
use std::process::{Command, Stdio};

fn main() {
    if probe("fn main() { 0i128; }") {
        println!("cargo:rustc-cfg=has_i128");
    } else if env::var_os("CARGO_FEATURE_I128").is_some() {
        panic!("i128 support was not detected!");
    }
}

/// Test if a code snippet can be compiled
fn probe(code: &str) -> bool {
    let rustc = env::var_os("RUSTC").unwrap_or_else(|| "rustc".into());
    let out_dir = env::var_os("OUT_DIR").expect("environment variable OUT_DIR");

    let mut child = Command::new(rustc)
        .arg("--out-dir")
        .arg(out_dir)
        .arg("--emit=obj")
        .arg("-")
        .stdin(Stdio::piped())
        .spawn()
        .expect("rustc probe");

    child
        .stdin
        .as_mut()
        .expect("rustc stdin")
        .write_all(code.as_bytes())
        .expect("write rustc stdin");

    child.wait().expect("rustc probe").success()
}