[std::isinf], [<cmath>],
[#include <cmath>
using std::isinf; int foo(float f) {return isinf(f);}])
+AC_SINGLE_CXX_CHECK([HAVE_FINITE_IN_IEEEFP_H], [ac_cv_func_finite_in_ieeefp_h],
+ [finite], [<ieeefp.h>],
+ [#include <ieeefp.h>
+ int foo(float f) {return finite(f);}])
])