From cf5248059508ace98f1f084a1a1fbc39700b836b Mon Sep 17 00:00:00 2001
From: Thomas White <taw@physics.org>
Date: Mon, 22 Feb 2010 18:26:47 +0100
Subject: Define M_PI only if it's not already defined

---
 data/diffraction.cl | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'data')

diff --git a/data/diffraction.cl b/data/diffraction.cl
index c3a0e637..d3fef375 100644
--- a/data/diffraction.cl
+++ b/data/diffraction.cl
@@ -11,7 +11,9 @@
 
 
 #include <defs.h>
+#ifndef M_PI
 #define M_PI ((float)(3.14159265))
+#endif
 
 float4 quat_rot(float4 q, float4 z)
 {
-- 
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