2 # This function determins if the HUGE_VAL macro is compilable with the
3 # -pedantic switch or not. XCode < 2.4.1 doesn't get it right.
5 AC_DEFUN([AC_HUGE_VAL_CHECK],[
6 AC_CACHE_CHECK([for HUGE_VAL sanity], [ac_cv_huge_val_sanity],[
8 ac_save_CXXFLAGS=$CXXFLAGS
9 CXXFLAGS="$CXXFLAGS -pedantic"
10 AC_RUN_IFELSE([AC_LANG_PROGRAM([[#include <math.h>]],
11 [[double x = HUGE_VAL; return x != x;]])],
12 [ac_cv_huge_val_sanity=yes],[ac_cv_huge_val_sanity=no],
13 [ac_cv_huge_val_sanity=yes])
14 CXXFLAGS=$ac_save_CXXFLAGS
17 AC_SUBST(HUGE_VAL_SANITY,$ac_cv_huge_val_sanity)