build.rs

// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.

// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with Parity.  If not, see <http://www.gnu.org/licenses/>.

extern crate rustc_version;

const MIN_RUSTC_VERSION: &'static str = "1.15.1";

fn main() {
	let is = rustc_version::version().unwrap();
	let required = MIN_RUSTC_VERSION.parse().unwrap();
	assert!(is >= required, format!("

It looks like you are compiling Parity with an old rustc compiler {}.
Parity requires version {}. Please update your compiler.
If you use rustup, try this:

    rustup update stable

and try building Parity again.

", is, required));
}