--- /dev/null
+#serial 4
+
+dnl From Paul Eggert.
+
+AC_PREREQ(2.14a)
+
+# Define uintmax_t to `unsigned long' or `unsigned long long'
+# if <inttypes.h> does not exist.
+
+AC_DEFUN(jm_AC_TYPE_UINTMAX_T,
+[
+ AC_REQUIRE([jm_AC_HEADER_INTTYPES_H])
+ if test $jm_ac_cv_header_inttypes_h = no; then
+ AC_REQUIRE([jm_AC_TYPE_UNSIGNED_LONG_LONG])
+ test $ac_cv_type_unsigned_long_long = yes \
+ && ac_type='unsigned long long' \
+ || ac_type='unsigned long'
+ AC_DEFINE_UNQUOTED(uintmax_t, $ac_type,
+[ Define to `unsigned long' or `unsigned long long'
+ if <inttypes.h> doesn't define.])
+ fi
+])