m4/uintmax_t.m4

   1 #serial 6
   2
   3 dnl From Paul Eggert.
   4
   5 AC_PREREQ(2.50)
   6
   7 # Define uintmax_t to `unsigned long' or `unsigned long long'
   8 # if <inttypes.h> does not exist.
   9
  10 AC_DEFUN([jm_AC_TYPE_UINTMAX_T],
  11 [
  12   AC_CHECK_TYPE(uintmax_t, ,
  13     [AC_REQUIRE([jm_AC_TYPE_UNSIGNED_LONG_LONG])
  14      test $ac_cv_type_unsigned_long_long = yes \
  15        && ac_type='unsigned long long' \
  16        || ac_type='unsigned long'
  17      AC_DEFINE_UNQUOTED(uintmax_t, $ac_type,
  18        [Define to the widest unsigned type if standard headers do not declare.])])
  19 ])