From 21ddee669025c305ca5c0f05095579564fdc8316 Mon Sep 17 00:00:00 2001
From: twinaphex <libretro@gmail.com>
Date: Tue, 21 Feb 2017 20:14:19 +0100
Subject: [PATCH] Don't define M_PI if we are using MSVC and USE_MATH_DEFINES
 is already defined

---
 libretro-common/include/retro_miscellaneous.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libretro-common/include/retro_miscellaneous.h b/libretro-common/include/retro_miscellaneous.h
index b11bb012fb..3f859eeedd 100644
--- a/libretro-common/include/retro_miscellaneous.h
+++ b/libretro-common/include/retro_miscellaneous.h
@@ -68,8 +68,10 @@
 #endif
 
 #ifndef M_PI
+#if !defined(_MSC_VER) && !defined(USE_MATH_DEFINES)
 #define M_PI 3.14159265358979323846264338327
 #endif
+#endif
 
 #ifndef MAX
 #define MAX(a, b) ((a) > (b) ? (a) : (b))