1 dnl 2 dnl This function determins if the isinf function isavailable on this 3 dnl platform. 4 dnl 5 6 AC_DEFUN([AC_FUNC_ISINF],[ 7 8 AC_SINGLE_CXX_CHECK([ac_cv_func_isinf_in_math_h], 9 [isinf], [<math.h>], 10 [float f; isinf(f);]) 11 if test "$ac_cv_func_isinf_in_math_h" = "yes" ; then 12 AC_DEFINE([HAVE_ISINF_IN_MATH_H], [1], 13 [Set to 1 if the isinf function is found in <math.h>]) 14 fi 15 16 AC_SINGLE_CXX_CHECK([ac_cv_func_isinf_in_cmath], 17 [isinf], [<cmath>], 18 [float f; isinf(f);]) 19 if test "$ac_cv_func_isinf_in_cmath" = "yes" ; then 20 AC_DEFINE([HAVE_ISINF_IN_CMATH], [1], 21 [Set to 1 if the isinf function is found in <cmath>]) 22 fi 23 24 AC_SINGLE_CXX_CHECK([ac_cv_func_std_isinf_in_cmath], 25 [std::isinf], [<cmath>], 26 [float f; std::isinf(f);]) 27 if test "$ac_cv_func_std_isinf_in_cmath" = "yes" ; then 28 AC_DEFINE([HAVE_STD_ISINF_IN_CMATH], [1], 29 [Set to 1 if the std::isinf function is found in <cmath>]) 30 fi 31 32 AC_SINGLE_CXX_CHECK([ac_cv_func_finite_in_ieeefp_h], 33 [finite], [<ieeefp.h>], 34 [float f; finite(f);]) 35 if test "$ac_cv_func_finite_in_ieeefp_h" = "yes" ; then 36 AC_DEFINE([HAVE_FINITE_IN_IEEEFP_H], [1], 37 [Set to 1 if the finite function is found in <ieeefp.h>]) 38 fi 39 40 ]) 41 42 43
