1 # 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. 4 # 5 AC_DEFUN([AC_HUGE_VAL_CHECK],[ 6 AC_CACHE_CHECK([for HUGE_VAL sanity], [ac_cv_huge_val_sanity],[ 7 AC_LANG_PUSH([C++]) 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=$ac_save_CXXFLAGS 15 AC_LANG_POP([C++]) 16 ]) 17 AC_SUBST(HUGE_VAL_SANITY,$ac_cv_huge_val_sanity) 18 ]) 19
