autoconf/m4/func_isinf.m4

   1 #
   2 # This function determins if the the isinf function isavailable on this
   3 # platform.
   4 #
   5 AC_DEFUN([AC_FUNC_ISINF],[
   6 AC_SINGLE_CXX_CHECK([HAVE_ISINF_IN_MATH_H],    [ac_cv_func_isinf_in_math_h],
   7                     [isinf], [<math.h>],
   8                     [#include <math.h>
   9                      int foo(float f) {return isinf(f);}])
  10 AC_SINGLE_CXX_CHECK([HAVE_ISINF_IN_CMATH],     [ac_cv_func_isinf_in_cmath],
  11                     [isinf], [<cmath>],
  12                     [#include <cmath>
  13                      int foo(float f) {return isinf(f);}])
  14 AC_SINGLE_CXX_CHECK([HAVE_STD_ISINF_IN_CMATH], [ac_cv_func_std_isinf_in_cmath],
  15                     [std::isinf], [<cmath>],
  16                     [#include <cmath>
  17                      using std::isinf; int foo(float f) {return isinf(f);}])
  18 AC_SINGLE_CXX_CHECK([HAVE_FINITE_IN_IEEEFP_H], [ac_cv_func_finite_in_ieeefp_h],
  19                     [finite], [<ieeefp.h>],
  20                     [#include <ieeefp.h>
  21                      int foo(float f) {return finite(f);}])
  22 ])
  23
  24