-VLC_EXPORT( block_t *, block_mmap_Alloc, (void *addr, size_t length) );
-VLC_EXPORT( block_t *, block_File, (int fd) );
+VLC_EXPORT( block_t *, block_heap_Alloc, (void *, void *, size_t) LIBVLC_USED );
+VLC_EXPORT( block_t *, block_mmap_Alloc, (void *addr, size_t length) LIBVLC_USED );
+VLC_EXPORT( block_t *, block_File, (int fd) LIBVLC_USED );