From 1c0dc8b34c953b2c27a8241874696db867e9a4a2 Mon Sep 17 00:00:00 2001
From: Klaus Basan <klaus.basan@klausbasan.de>
Date: Sat, 5 Oct 2019 23:19:31 +0200
Subject: [PATCH] Ref T730, avoid math DEFINE warnings if values are already
 defined

---
 src/blacksound/dsp/SimpleHeader.h | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/src/blacksound/dsp/SimpleHeader.h b/src/blacksound/dsp/SimpleHeader.h
index 2e54e998d..df346be7a 100644
--- a/src/blacksound/dsp/SimpleHeader.h
+++ b/src/blacksound/dsp/SimpleHeader.h
@@ -26,16 +26,17 @@
  *	DEALINGS IN THE SOFTWARE.
  */
 
+#ifndef BLACKSOUND_DSP_SIMPLE_HEADER_H
+#define BLACKSOUND_DSP_SIMPLE_HEADER_H
 
-#ifndef __SIMPLE_HEADER_H__
-#define __SIMPLE_HEADER_H__
-
-#if _MSC_VER > 1000			// MS Visual Studio
-#define INLINE __forceinline	// forces inline
-#define NOMINMAX				// for standard library min(), max()
-#define _USE_MATH_DEFINES		// for math constants
-#else						// other IDE's
-#define INLINE inline
+#if _MSC_VER > 1000 // MS Visual Studio
+#   define INLINE __forceinline  // forces inline
+#   define NOMINMAX              // for standard library min(), max()
+#   ifndef M_PI
+#       define _USE_MATH_DEFINES // for math constants
+#   endif
+#else  // other IDE's
+#   define INLINE inline
 #endif
 
 #include <algorithm>	// for min(), max()