notmuch-crypto.el: "‘notmuch-show-get-message-id’ is not known to be defined"

[Örjan Ekeberg]

Daniel Kahn Gillmor <dkg at fifthhorseman.net> writes:

> When building the current version of notmuch on debian testing/unstable,
> i see the following warning:
>
> ```
> EMACS emacs/notmuch-crypto.elc
>
> In end of data:
> emacs/notmuch-crypto.el:266:1:Warning: the function
>     ‘notmuch-show-get-message-id’ is not known to be defined.
> ```
>
> No part of the test suite fails so i assume it's not a problem, but
> having spurious warnings makes it harder to notice real warnings in the
> future.
>
> I don't know what the warning means exactly, but maybe someone who is
> better with elisp than i am could take a look at it and try to resolve
> it?

Adding this line in notmuch-crypto.el solves this:

(declare-function notmuch-show-get-message-id "notmuch-show" (&optional bare))

As a matter of style, I am not sure where to put it.  Normally, these
declarations are put in the beginning of the file; right after the
require-statements.  In notmuch-crypto.el, however, the only other
declaration is put just in front of where the function is called.

/Örjan