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