[PATCH 1/4] doc: don't attempt to build info pages if Emacs is missing.

[David Bremner]

David Bremner <david at tethera.net> writes:

> This is a sledgehammer approach to conditionally (not) build the
> notmuch-emacs documentation, since it is currently the only thing that
> needs Emacs to build.  Hopefully in the future we can come up with a
> cleaner way of disabling building the notmuch-emacs docs when emacs is
> missing.

This is not enough, but itself, as docstrings.stamp also needs to be
special cased. And that still leaves a bunch of ugly warnings and errors
when building the man pages. So I probably need to rething this patch.