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      1 #
      2 # This function determins if the isinf function isavailable on this
      3 # platform.
      4 #
      5 AC_DEFUN([AC_FUNC_ISINF],[
      6 AC_SINGLE_CXX_CHECK([ac_cv_func_isinf_in_math_h],   
      7                     [isinf], [<math.h>],
      8                     [float f; isinf(f);])
      9 if test "$ac_cv_func_isinf_in_math_h" = "yes" ; then 
     10   AC_DEFINE([HAVE_ISINF_IN_MATH_H],1,[Set to 1 if the isinf function is found in <math.h>])
     11 fi
     12 
     13 AC_SINGLE_CXX_CHECK([ac_cv_func_isinf_in_cmath],    
     14                     [isinf], [<cmath>],
     15                     [float f; isinf(f);])
     16 if test "$ac_cv_func_isinf_in_cmath" = "yes" ; then
     17   AC_DEFINE([HAVE_ISINF_IN_CMATH],1,[Set to 1 if the isinf function is found in <cmath>])
     18 fi
     19 
     20 AC_SINGLE_CXX_CHECK([ac_cv_func_std_isinf_in_cmath],
     21                     [std::isinf], [<cmath>],
     22                     [float f; std::isinf(f);])
     23 if test "$ac_cv_func_std_isinf_in_cmath" = "yes" ; then 
     24   AC_DEFINE([HAVE_STD_ISINF_IN_CMATH],1,[Set to 1 if the std::isinf function is found in <cmath>])
     25 fi
     26 
     27 AC_SINGLE_CXX_CHECK([ac_cv_func_finite_in_ieeefp_h],
     28                     [finite], [<ieeefp.h>],
     29                     [float f; finite(f);])
     30 if test "$ac_cv_func_finite_in_ieeefp_h" = "yes" ; then
     31   AC_DEFINE([HAVE_FINITE_IN_IEEEFP_H],1,[Set to 1 if the finite function is found in <ieeefp.h>])
     32 fi
     33 
     34 ])
     35 
     36 
     37