From a00fa7b7013b86afafb773b954e5b81ea1c8c85a Mon Sep 17 00:00:00 2001
From: "A. Unique TensorFlower" <gardener@tensorflow.org>
Date: Fri, 1 Jul 2016 08:07:53 -0800
Subject: [PATCH] Adds documentation for ubuntu-specific build issue seen by
 open-source users. Change: 126415298

---
 tensorflow/g3doc/get_started/os_setup.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tensorflow/g3doc/get_started/os_setup.md b/tensorflow/g3doc/get_started/os_setup.md
index 158c84b4ef0..923535144b8 100644
--- a/tensorflow/g3doc/get_started/os_setup.md
+++ b/tensorflow/g3doc/get_started/os_setup.md
@@ -952,6 +952,14 @@ SyntaxError: invalid syntax
 
 Solution: make sure you are using Python 2.7.
 
+#### Ubuntu build issue on Linux 16.04 when building with --config=cuda: build fail with cuda: identifier "__builtin_ia32_mwaitx" is undefined.
+GitHub issue: https://github.com/tensorflow/tensorflow/issues/1066
+
+Solution: Add the following compiler flags to third_party/gpus/crosstool/CROSSTOOL
+
+cxx_flag: "-D_MWAITXINTRIN_H_INCLUDED"
+cxx_flag: "-D_FORCE_INLINES"
+
 ### Mac OS X: ImportError: No module named copyreg
 
 On Mac OS X, you may encounter the following when importing tensorflow.