forked from OSchip/llvm-project
28 lines
986 B
Plaintext
28 lines
986 B
Plaintext
#
|
|
# This function determines if the isnan function is available on this
|
|
# platform.
|
|
#
|
|
AC_DEFUN([AC_FUNC_ISNAN],[
|
|
AC_SINGLE_CXX_CHECK([ac_cv_func_isnan_in_math_h],
|
|
[isnan], [<math.h>],
|
|
[float f; isnan(f);])
|
|
|
|
if test "$ac_cv_func_isnan_in_math_h" = "yes" ; then
|
|
AC_DEFINE([HAVE_ISNAN_IN_MATH_H],1,[Set to 1 if the isnan function is found in <math.h>])
|
|
fi
|
|
|
|
AC_SINGLE_CXX_CHECK([ac_cv_func_isnan_in_cmath],
|
|
[isnan], [<cmath>],
|
|
[float f; isnan(f);])
|
|
if test "$ac_cv_func_isnan_in_cmath" = "yes" ; then
|
|
AC_DEFINE([HAVE_ISNAN_IN_CMATH],1,[Set to 1 if the isnan function is found in <cmath>])
|
|
fi
|
|
|
|
AC_SINGLE_CXX_CHECK([ac_cv_func_std_isnan_in_cmath],
|
|
[std::isnan], [<cmath>],
|
|
[float f; std::isnan(f);])
|
|
if test "$ac_cv_func_std_isnan_in_cmath" = "yes" ; then
|
|
AC_DEFINE([HAVE_STD_ISNAN_IN_CMATH],1,[Set to 1 if the std::isnan function is found in <cmath>])
|
|
fi
|
|
])
|