From a367ae0d2bbde0dc9feea9a4295070f653b788fb Mon Sep 17 00:00:00 2001
From: andrewlewis <andrewlewis@google.com>
Date: Thu, 30 Nov 2017 02:57:07 -0800
Subject: [PATCH] Add a notice that NDK <= version 15c is required for VP9

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=177430827
---
 extensions/vp9/README.md | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/extensions/vp9/README.md b/extensions/vp9/README.md
index 941b413c09..649e4a6ee2 100644
--- a/extensions/vp9/README.md
+++ b/extensions/vp9/README.md
@@ -28,7 +28,8 @@ EXOPLAYER_ROOT="$(pwd)"
 VP9_EXT_PATH="${EXOPLAYER_ROOT}/extensions/vp9/src/main"
 ```
 
-* Download the [Android NDK][] and set its location in an environment variable:
+* Download the [Android NDK][] and set its location in an environment variable.
+Only versions up to NDK 15c are supported currently (see [#3520][]).
 
 ```
 NDK_PATH="<path to Android NDK>"
@@ -70,6 +71,7 @@ ${NDK_PATH}/ndk-build APP_ABI=all -j4
 
 [top level README]: https://github.com/google/ExoPlayer/blob/release-v2/README.md
 [Android NDK]: https://developer.android.com/tools/sdk/ndk/index.html
+[#3520]: https://github.com/google/ExoPlayer/issues/3520
 
 ## Notes ##