From c7d736acd4acca7ed2b1dcd8cf1e6bb18efe87d2 Mon Sep 17 00:00:00 2001
From: WangRunji <wangrunji0408@163.com>
Date: Fri, 15 Feb 2019 20:11:27 +0800
Subject: [PATCH] use rust-toolchain file instead of rustup override

---
 .travis.yml    | 2 +-
 README.md      | 3 +--
 rust-toolchain | 1 +
 3 files changed, 3 insertions(+), 3 deletions(-)
 create mode 100644 rust-toolchain

diff --git a/.travis.yml b/.travis.yml
index 02df662..8b2e7ea 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,7 +4,7 @@ dist: xenial
 
 language: rust
 
-rust: nightly-2019-02-15
+rust: nightly-2019-02-16
 
 os:
   - linux
diff --git a/README.md b/README.md
index 2ecc046..1b23e0d 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ Tested boards: QEMU, labeled-RISCV, K210, Raspberry Pi 3B+
 
 ### Environment
 
-* [Rust](https://www.rust-lang.org) toolchain at nightly-2019-02-15
+* [Rust](https://www.rust-lang.org) toolchain at nightly-2019-02-16
 * Cargo tools: [cargo-xbuild](https://github.com/rust-osdev/cargo-xbuild)
 * [QEMU](https://www.qemu.org) >= 3.1.0
 * [bootimage](https://github.com/rust-osdev/bootimage) (for x86_64)
@@ -39,7 +39,6 @@ cargo install cargo-xbuild bootimage
 ```bash
 git clone https://github.com/oscourse-tsinghua/rcore_plus.git --recursive
 cd rcore_plus/kernel
-rustup override set nightly-2019-02-15
 make run arch={riscv32,riscv64,x86_64,aarch64}
 ```
 
diff --git a/rust-toolchain b/rust-toolchain
new file mode 100644
index 0000000..49db8e4
--- /dev/null
+++ b/rust-toolchain
@@ -0,0 +1 @@
+nightly-2019-02-16