#include "obstack.h"
#include <stdio.h>
+#if USE_UNLOCKED_IO
+# include "unlocked-io.h"
+#endif
+
/* Attributes used to select a bitset implementation. */
enum bitset_attr {BITSET_FIXED = 1, /* Bitset size fixed. */
BITSET_VARIABLE = 2, /* Bitset size variable. */