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--- /tmp/utility.h	2008-09-02 16:35:44.000000000 +0200
+++ gnash/libbase/utility.h	2008-09-02 16:36:10.000000000 +0200
@@ -327,6 +327,10 @@
 #endif
 }
 
+#ifndef HAVE_TRUNC
+inline double trunc(double x) { return (x < 0 ?  -(std::floor(-x)) : std::floor(x)); }
+#endif
+
 #endif // UTILITY_H