From 8a77d1ca3fc2df789157f7986ddbaf2a377ff0fe Mon Sep 17 00:00:00 2001
From: mibac138 <5672750+mibac138@users.noreply.github.com>
Date: Sat, 2 May 2020 18:33:42 +0200
Subject: [PATCH] Add build script to rustc_attr because of cfg(version)

---
 src/librustc_attr/Cargo.toml | 1 +
 src/librustc_attr/build.rs   | 4 ++++
 2 files changed, 5 insertions(+)
 create mode 100644 src/librustc_attr/build.rs

diff --git a/src/librustc_attr/Cargo.toml b/src/librustc_attr/Cargo.toml
index ad97ac8ffd3d2..d7af7fe6143e5 100644
--- a/src/librustc_attr/Cargo.toml
+++ b/src/librustc_attr/Cargo.toml
@@ -3,6 +3,7 @@ authors = ["The Rust Project Developers"]
 name = "rustc_attr"
 version = "0.0.0"
 edition = "2018"
+build = "build.rs"
 
 [lib]
 name = "rustc_attr"
diff --git a/src/librustc_attr/build.rs b/src/librustc_attr/build.rs
new file mode 100644
index 0000000000000..d230ba91039ad
--- /dev/null
+++ b/src/librustc_attr/build.rs
@@ -0,0 +1,4 @@
+fn main() {
+    println!("cargo:rerun-if-changed=build.rs");
+    println!("cargo:rerun-if-env-changed=CFG_VERSION");
+}