Hi all,

As I was just editing subr.el, I noticed that some functions there are
missing a docstring, and a lot of them don't conform to `checkdoc'.

I attach a patch that makes it possible to call:

    make checkdoc

I think it's more convenient than M-x checkdoc, since compilation-mode
has a nicer interface.

I'm not yet sure if the file list should be passed to `make', or it
should be hard-coded, so far I've just put '("subr.el") as the file
list.

I also don't know where to put a file that the Makefile target wants to
load, I've just put it in elisp/do-checkdoc.el.

Let me know what you think of this idea, if it should be implemented,
and how it can be improved.

Oleh