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/maestro
    
    the code of the file until where you have to start completion: //! TODO doc

mod build_impl;

use build_impl::*;
use config::Config;
use std::env;
use std::io::ErrorKind;
use std::process::exit;
use target::Target;

fn main() {
	let profile = env::var("PROFILE").unwrap();

	let config = Config::read().unwrap_or_else(|e| {
		if e.kind() == ErrorKind::NotFound {
			eprintln!("Configuration file not found");
			eprintln!();
			eprintln!(
				"Please make sure the con
    
fn main() {
	let profile = env::var("PROFILE").unwrap();

	let config = Config::read().unwrap_or_else(|e| {
		if e.kind() == ErrorKind::NotFound {
			eprintln!("Configuration file not found");
			eprintln!();
			eprintln!(
				"Please make sure the configuration file at `{}` exists`",
				config::PATH
			);
			eprintln!("An example configuration file can be found in `default.config.toml`");
		} else {
			eprintln!("Cannot read configuration file: {}", e);
		}

		exit(1);
	});
	config.set_cfg(profile == "debug");

	let target = Target::from_env()
		.unwrap_or_else(|e| {
			eprintln!("Cannot retrieve target: {}", e);
			exit(1);
		})
		.unwrap_or_else(|| {
			eprintln!("No target specified. Please specify one with the `--target` option");
			exit(1);
		});

	compile::compile_c(&target).unwrap_or_else(|e| {
		eprintln!("Compilation failed: {}", e);
		exit(1);
	});
	compile::compile_vdso(&target);

	// Add the linker script
	println!(
		"cargo:rerun-if-changed={}",
		target.get_linker_script_path().display()
	);
	println!(
		"cargo:rustc-link-arg=-T{}",
		target.get_linker_script_path().display()
	);
}