From 85e79c248df4dc5045be2c483ba14e5120951539 Mon Sep 17 00:00:00 2001
From: Andrew Willmott <andrewwillmott@users.noreply.github.com>
Date: Tue, 24 Jul 2018 16:22:00 +0100
Subject: [PATCH] Windows build fixes

---
 3rdparty/astc/astc_weight_align.cpp | 2 ++
 3rdparty/astc/mathlib.cpp           | 9 +++++++++
 2 files changed, 11 insertions(+)

diff --git a/3rdparty/astc/astc_weight_align.cpp b/3rdparty/astc/astc_weight_align.cpp
index 39d1e94..789438f 100644
--- a/3rdparty/astc/astc_weight_align.cpp
+++ b/3rdparty/astc/astc_weight_align.cpp
@@ -37,6 +37,8 @@
  */
 /*----------------------------------------------------------------------------*/
 
+#define _USE_MATH_DEFINES    // for M_PI on windows
+
 #include <math.h>
 #include "astc_codec_internals.h"
 
diff --git a/3rdparty/astc/mathlib.cpp b/3rdparty/astc/mathlib.cpp
index 3c41a0a..faaad3a 100644
--- a/3rdparty/astc/mathlib.cpp
+++ b/3rdparty/astc/mathlib.cpp
@@ -13,12 +13,21 @@
  */ 
 /*----------------------------------------------------------------------------*/ 
 
+#define _USE_MATH_DEFINES    // for M_PI on windows
+
 #include <time.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <math.h>
 #include "mathlib.h"
 
+#ifdef WIN32
+    double cbrt(double n)
+    {
+        return n < 0 ? -pow(-n, 1.0 / 3.0) : pow(n, 1.0 / 3.0);
+    }
+#endif
+
 /**************************
   basic OpenCL functions
 **************************/