| # |
| # This function determins if the HUGE_VAL macro is compilable with the |
| # -pedantic switch or not. XCode < 2.4.1 doesn't get it right. |
| # |
| AC_DEFUN([AC_HUGE_VAL_CHECK],[ |
| AC_CACHE_CHECK([for HUGE_VAL sanity], [ac_cv_huge_val_sanity],[ |
| AC_LANG_PUSH([C++]) |
| ac_save_CXXFLAGS=$CXXFLAGS |
| CXXFLAGS="$CXXFLAGS -pedantic" |
| AC_RUN_IFELSE([AC_LANG_PROGRAM([[#include <math.h>]], |
| [[double x = HUGE_VAL; return x != x;]])], |
| [ac_cv_huge_val_sanity=yes],[ac_cv_huge_val_sanity=no], |
| [ac_cv_huge_val_sanity=yes]) |
| CXXFLAGS=$ac_save_CXXFLAGS |
| AC_LANG_POP([C++]) |
| ]) |
| AC_SUBST(HUGE_VAL_SANITY,$ac_cv_huge_val_sanity) |
| ]) |
