-void * obstack_copy (struct obstack *obstack, void *address, int size);
-void * obstack_copy0 (struct obstack *obstack, void *address, int size);
-
-void obstack_free (struct obstack *obstack, void *block);
-
-void obstack_blank (struct obstack *obstack, int size);
-
-void obstack_grow (struct obstack *obstack, void *data, int size);
-void obstack_grow0 (struct obstack *obstack, void *data, int size);
-
-void obstack_1grow (struct obstack *obstack, int data_char);
-void obstack_ptr_grow (struct obstack *obstack, void *data);
-void obstack_int_grow (struct obstack *obstack, int data);
-
-void * obstack_finish (struct obstack *obstack);
-
-int obstack_object_size (struct obstack *obstack);
-
-int obstack_room (struct obstack *obstack);
-void obstack_make_room (struct obstack *obstack, int size);
-void obstack_1grow_fast (struct obstack *obstack, int data_char);
-void obstack_ptr_grow_fast (struct obstack *obstack, void *data);
-void obstack_int_grow_fast (struct obstack *obstack, int data);
-void obstack_blank_fast (struct obstack *obstack, int size);
-
-void * obstack_base (struct obstack *obstack);
-void * obstack_next_free (struct obstack *obstack);
-int obstack_alignment_mask (struct obstack *obstack);
-int obstack_chunk_size (struct obstack *obstack);
-int obstack_memory_used (struct obstack *obstack);
-
-#endif /* __STDC__ */
-
-/* Non-ANSI C cannot really support alternative functions for these macros,
- so we do not declare them. */
+/* The default name of the function for freeing a chunk is 'obstack_free',
+ but gnulib users can override this by defining '__obstack_free'. */
+#ifndef __obstack_free
+# define __obstack_free obstack_free
+#endif
+extern void __obstack_free (struct obstack *obstack, void *block);