From eae90ebc9220ed26963e9f4b34268094ec629d4c Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Fri, 15 May 2015 10:18:00 +0200
Subject: Make sure that M_PI is defined.

---
 src/powerlist.cc | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

(limited to 'src')

diff --git a/src/powerlist.cc b/src/powerlist.cc
index 6cff863..4248b30 100644
--- a/src/powerlist.cc
+++ b/src/powerlist.cc
@@ -28,14 +28,16 @@
 
 #include <stdlib.h>
 
-// Otherwise M_PI is not defined in math.h on some older platforms...
-#define _USE_MATH_DEFINES
-#include <math.h>
-
 #include <string.h>
 
 #include <hugin.hpp>
 
+// M_PI is not defined in math.h if __STRICT_ANSI__ is defined.
+#ifdef __STRICT_ANSI__
+#undef __STRICT_ANSI__
+#endif
+#include <math.h>
+
 /**
  * Minimum sample set size.
  * Smaller means wider 'velocity groups'.
-- 
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