--- ./libsrc/occ/Partition_Loop.cxx.ori	2013-01-11 00:40:57.337583247 +0100
+++ ./libsrc/occ/Partition_Loop.cxx	2013-01-11 00:41:29.556178204 +0100
@@ -66,6 +66,9 @@
 #include <TopExp.hxx>
 #include <TopExp_Explorer.hxx>
 
+#include <math.h>
+#define PI M_PI
+
 static char* name = new char[100];
 static int nbe = 0;
 
--- ./libsrc/occ/Partition_Loop2d.cxx.ori	2013-01-11 00:40:11.645157678 +0100
+++ ./libsrc/occ/Partition_Loop2d.cxx	2013-01-11 00:40:42.996763535 +0100
@@ -51,6 +51,9 @@
 #include <gp_Pnt.hxx>
 #include <gp_Pnt2d.hxx>
 
+#include <math.h>
+#define PI M_PI
+
 //=======================================================================
 //function : Partition_Loop2d
 //purpose  :