Thanks for your helping, Jason and Stefan.
I fixed a patch according to it.
(I read archives on http://lists.gnu.org/archive/html/emacs-devel/.)

(I write again.)
step to enable move-file-to-trash:

    cd src
    patch -i patch__enable_delete_to_trash.diff
    make all install

    Run emacs
    (load-file "move-file-to-trash.el")
    (setq delete-by-moving-to-trash t)