diff options
Diffstat (limited to 'projects/sample/autoconf/m4/func_isnan.m4')
| -rw-r--r-- | projects/sample/autoconf/m4/func_isnan.m4 | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/projects/sample/autoconf/m4/func_isnan.m4 b/projects/sample/autoconf/m4/func_isnan.m4 new file mode 100644 index 0000000000..eb5ca0daeb --- /dev/null +++ b/projects/sample/autoconf/m4/func_isnan.m4 @@ -0,0 +1,27 @@ +# +# 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 +]) |