--- src/filter/vignette/vignette.cpp    2015-02-28 15:09:06.334276200 +0000
+++ src/filter/vignette/vignette-p.cpp  2015-02-28 15:14:14.402952100 +0000
@@ -21,6 +21,9 @@
 #include "frei0r.hpp"
 #include "frei0r_math.h"

+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif

 /**
   Lens vignetting effect.


--- src/filter/vignette/vignette.cpp    2015-02-28 15:09:06.334276200 +0000
+++ src/filter/vignette/vignette-p.cpp  2015-02-28 15:14:14.402952100 +0000
@@ -21,6 +21,9 @@
 #include "frei0r.hpp"
 #include "frei0r_math.h"

+#ifndef M_PI_2
+#define M_PI_2 1.57079632679489661923
+#endif

 /**
   Lens vignetting effect.

Fix M_PI_2 (pi/2) not defined
Fix M_PI_2 (pi/2) not defined
