From 53e66dbf4c17b4f823f57c974c77b6f7f02627bf Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Fri, 15 May 2015 10:11:08 +0200
Subject: Make sure that M_PI is defined.

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

diff --git a/src/powerlist.cc b/src/powerlist.cc
index 6fc77ad..6cff863 100644
--- a/src/powerlist.cc
+++ b/src/powerlist.cc
@@ -27,7 +27,11 @@
 #include "powerlist.h"
 
 #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>
-- 
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