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