From 0b3c636d43f0d6211c8e8dfef4c909b1bed3ce30 Mon Sep 17 00:00:00 2001
From: Christian Sigg <csigg@google.com>
Date: Mon, 8 Jul 2019 11:48:20 -0700
Subject: [PATCH] Make M_PI available on MSVC.

PiperOrigin-RevId: 257024979
---
 tensorflow/lite/experimental/microfrontend/lib/window_util.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tensorflow/lite/experimental/microfrontend/lib/window_util.c b/tensorflow/lite/experimental/microfrontend/lib/window_util.c
index b142532bd30..8424ee6f8c0 100644
--- a/tensorflow/lite/experimental/microfrontend/lib/window_util.c
+++ b/tensorflow/lite/experimental/microfrontend/lib/window_util.c
@@ -14,6 +14,8 @@ limitations under the License.
 ==============================================================================*/
 #include "tensorflow/lite/experimental/microfrontend/lib/window_util.h"
 
+// This macro is required to make MSVC defines math constants in math.h
+#define _USE_MATH_DEFINES
 #include <math.h>
 #include <stdio.h>
 #include <stdlib.h>