-/* Given an address in the middle of a malloc'd object,
- return the address of the beginning of the object. */
-extern void *malloc_find_object_address (void *ptr);
-
-/* Underlying allocation function; successive calls should
- return contiguous pieces of memory. */
-extern void *(*__morecore) (ptrdiff_t size);
-
-/* Default value of `__morecore'. */
-extern void *__default_morecore (ptrdiff_t size);
-
-/* If not NULL, this function is called after each time
- `__morecore' is called to increase the data size. */
-extern void (*__after_morecore_hook) (void);
-
-/* Number of extra blocks to get each time we ask for more core.
- This reduces the frequency of calling `(*__morecore)'. */
-extern size_t __malloc_extra_blocks;
-