--- configure.ac.orig	2010-03-10 10:57:12.000000000 +0000
+++ configure.ac	2010-10-26 17:57:47.000000000 +0100
@@ -197,6 +197,7 @@
 AC_CHECK_DECLS(atanh,,,[#include <math.h>])
 AC_CHECK_DECLS(ldexp,,,[#include <math.h>])
 AC_CHECK_DECLS(frexp,,,[#include <math.h>])
+AC_CHECK_DECLS([fprnd_t],[],[],[[#include <float.h>]]) 
 AC_CHECK_DECLS(isinf,,,[#include <math.h>])
 AC_CHECK_DECLS(isfinite,,,[#include <math.h>])
 AC_CHECK_DECLS(finite,,,[#include <math.h>