m4/ulonglong.m4

   1 #serial 1
   2
   3 dnl From Paul Eggert.
   4
   5 AC_DEFUN(jm_AC_TYPE_UNSIGNED_LONG_LONG,
   6 [
   7   AC_CACHE_CHECK([for unsigned long long], ac_cv_type_unsigned_long_long,
   8   [AC_TRY_COMPILE([],
   9     [unsigned long long i = (unsigned long long) -1;],
  10     ac_cv_type_unsigned_long_long=yes,
  11     ac_cv_type_unsigned_long_long=no)])
  12   if test $ac_cv_type_unsigned_long_long = yes; then
  13     AC_DEFINE(HAVE_UNSIGNED_LONG_LONG, 1,
  14       [Define if you have the unsigned long long type.])
  15   fi
  16 ])