From 33efce1c2f280848a84b94f99ea1bc874e189a37 Mon Sep 17 00:00:00 2001
From: Oliver Scherer <github35764891676564198441@oli-obk.de>
Date: Wed, 21 Nov 2018 14:27:30 +0100
Subject: [PATCH] Forward rust version number to tools

Clippy uses it to identify the correct documentation to point to
---
 src/bootstrap/tool.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/bootstrap/tool.rs b/src/bootstrap/tool.rs
index 978e3602e7dbc..d8e86644ee054 100644
--- a/src/bootstrap/tool.rs
+++ b/src/bootstrap/tool.rs
@@ -22,6 +22,7 @@ use util::{exe, add_lib_path};
 use compile;
 use native;
 use channel::GitInfo;
+use channel;
 use cache::Interned;
 use toolstate::ToolState;
 
@@ -240,6 +241,7 @@ pub fn prepare_tool_cargo(
 
     cargo.env("CFG_RELEASE_CHANNEL", &builder.config.channel);
     cargo.env("CFG_VERSION", builder.rust_version());
+    cargo.env("CFG_RELEASE_NUM", channel::CFG_RELEASE_NUM);
 
     let info = GitInfo::new(&builder.config, &dir);
     if let Some(sha) = info.sha() {