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
