itex2mml 0.2.0

use std::path::PathBuf;
fn main() {
    let test_lib = std::process::Command::new("ld")
        .args(&["-l", "itex2mml"])
        .output()
        .expect("failed to run yacc");
    let stderr = test_lib.stderr;
    if !(0..stderr.len()).any(|i| (&stderr[i..]).starts_with(b"itex2mml")) {
        return;
    }
    let out_dir = std::env::var_os("OUT_DIR").map(PathBuf::from).unwrap();
    let yacc_c = out_dir.join("y.tab.c");
    let flex_c = out_dir.join("lex.yy.c");
    std::process::Command::new("yacc")
        .args(&[
            "-p",
            "itex2MML_yy",
            "-d",
            "src/itex2MML.y",
            "-o",
            &yacc_c.to_str().unwrap(),
        ])
        .output()
        .expect("failed to run yacc");
    std::process::Command::new("flex")
        .args(&[
            "-Pitex2MML_yy",
            &("-o".to_string() + flex_c.to_str().unwrap()),
            "src/itex2MML.l",
        ])
        .output()
        .expect("failed to run flex");
    cc::Build::new()
        .include("src")
        .files(&[flex_c.to_str().unwrap(), yacc_c.to_str().unwrap()])
        .opt_level(3)
        .static_flag(true)
        .warnings(false)
        .compile("itex2mml");
}