You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: build.rs
    path of file: ./repos/differential-datalog/rust/template/src
    
    the code of the file until where you have to start completion: fn main() {
    #[cfg(not(windows))]
    libtool();
}

#[cfg(not(windows))]
fn libtool() {
    use std::env;
    use std::fs;
    use std::path::{Path, PathBuf};

    let topdir = env::var("CARGO_MANIFEST_DIR").unwrap();
    let fbufpath = format!("{}/src/flatbuf.rs", topdir);

    /* When `build.rs` is present, Cargo triggers recompilation whenever any
     * file in the Rust project directory changes, including auto-generated
     * Java files.  As a workaround, the following commands tell cargo to
     * only recompile when one of the listed files changes. */

    /* Only include flatbuf files as dependencies if the project was
     * compiled with flatbuf support.
     */
    if Path::new(fbufpath.as_str()).exists() {
        println!("cargo:rerun-if-changed=src/flatbuf.rs");
        println!("cargo:rerun-if-changed=src/flatbuf_generated.rs");
    }
    println!("cargo:rerun-if-changed=src/lib.rs");
    println!("cargo:rerun-if-changed=src/main.rs");
    println!("cargo:rerun-if-changed=src/ovsdb_api.rs");

    let lib = "libdatalog_example_ddlog";

    /* Start: fixup for a bug in libtool, which does not correctly
     * remove the symlink it creates.  Remove this fixup once an updated
     * libtool crate is available.
     *
     * See: https://github.com/kanru/libtool-rs/issues/2#issue-440212008
     */
    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 new_lib_path = PathBuf::from(form
    
fn libtool() {
    use std::env;
    use std::fs;
    use std::path::{Path, PathBuf};

    let topdir = env::var("CARGO_MANIFEST_DIR").unwrap();
    let fbufpath = format!("{}/src/flatbuf.rs", topdir);

    /* When `build.rs` is present, Cargo triggers recompilation whenever any
     * file in the Rust project directory changes, including auto-generated
     * Java files.  As a workaround, the following commands tell cargo to
     * only recompile when one of the listed files changes. */

    /* Only include flatbuf files as dependencies if the project was
     * compiled with flatbuf support.
     */
    if Path::new(fbufpath.as_str()).exists() {
        println!("cargo:rerun-if-changed=src/flatbuf.rs");
        println!("cargo:rerun-if-changed=src/flatbuf_generated.rs");
    }
    println!("cargo:rerun-if-changed=src/lib.rs");
    println!("cargo:rerun-if-changed=src/main.rs");
    println!("cargo:rerun-if-changed=src/ovsdb_api.rs");

    let lib = "libdatalog_example_ddlog";

    /* Start: fixup for a bug in libtool, which does not correctly
     * remove the symlink it creates.  Remove this fixup once an updated
     * libtool crate is available.
     *
     * See: https://github.com/kanru/libtool-rs/issues/2#issue-440212008
     */
    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 new_lib_path = PathBuf::from(format!("{}/{}.a", libs_dir, lib));
    let _ = fs::remove_file(&new_lib_path);
    /* End: fixup */

    libtool::generate_convenience_lib(lib).unwrap();
}