From 2654357c728db257d0b13ee3a0243c82032226c2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mis=CC=8Cko=20Hevery?= <misko@hevery.com>
Date: Tue, 13 Feb 2018 15:12:40 -0800
Subject: [PATCH] docs: update BAZEL.md crosstool error instructions (#22018)
 PR Close #22018

---
 docs/BAZEL.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/docs/BAZEL.md b/docs/BAZEL.md
index 2794e47e78..f5e3481a93 100644
--- a/docs/BAZEL.md
+++ b/docs/BAZEL.md
@@ -194,10 +194,13 @@ source: https://github.com/bazelbuild/bazel/issues/4603
 
 If VSCode is not the root cause, you might try:
 
+- Quit VSCode (make sure no VSCode is running).
+
 ```
 bazel clean --expunge
 sudo xcode-select -s /Applications/Xcode.app/Contents/Developer
 sudo xcodebuild -license
+bazel build //packages/core    # Run a build outside VSCode to pre-build the xcode; then safe to run VSCode
 ```
 
 Source: https://stackoverflow.com/questions/45276830/xcode-version-must-be-specified-to-use-an-apple-crosstool