pub fn generate_convenience_lib(lib: &str) -> std::io::Result<()> {
    let self_version = env!("CARGO_PKG_VERSION");
    let topdir = env::var("CARGO_MANIFEST_DIR").unwrap();
    let profile = env::var("PROFILE").unwrap();
    let target_dir = format!("{}/target/{}", topdir, profile);
    let libs_dir = format!("{}/.libs", target_dir);
    let libs_path = PathBuf::from(&libs_dir);
    let la_path = PathBuf::from(format!("{}/{}.la", target_dir, lib));
    let old_lib_path = PathBuf::from(format!("{}/{}.a", target_dir, lib));
    let new_lib_path = PathBuf::from(format!("{}/{}.a", libs_dir, lib));
    fs::create_dir_all(&libs_path).unwrap();

    fs::remove_file(&la_path)?;
    fs::remove_file(&new_lib_path)?;

    let mut file = File::create(&la_path)?;
    writeln!(file, "# {}.la - a libtool library file", lib)?;
    writeln!(file, "# Generated by libtool-rust {}", self_version)?;
    writeln!(file, "dlname=''")?;
    writeln!(file, "library_names=''")?;
    writeln!(file, "old_library='{}.a'", lib)?;
    writeln!(file, "inherited_linker_flags=' -pthread -lm -ldl'")?;
    writeln!(file, "installed=no")?;
    writeln!(file, "shouldnotlink=no")?;
    symlink(&old_lib_path, &new_lib_path)?;
    Ok(())
}