$OpenBSD$

Already have M_PI in math.h

Index: VGMPlay/chips/mamedef.h
--- VGMPlay/chips/mamedef.h.orig
+++ VGMPlay/chips/mamedef.h
@@ -49,7 +49,6 @@ typedef INT32 stream_sample_t;
 #else
 #define INLINE	static inline
 #endif
-#define M_PI	3.14159265358979323846
 
 #ifdef _DEBUG
 #define logerror	printf
