bug#21724: 25.0.50; (void-function (setf epg-context-armor))

[Katsumi Yamaoka <yamaoka@jpl.org>]

References: <http://thread.gmane.org/gmane.emacs.diffs/132036>

On Tue, 13 Oct 2015 09:36:28 +0900, Katsumi Yamaoka wrote:
> On Sun, 11 Oct 2015 21:03:07 +0000, Nicolas Petton wrote:
>>     * lisp/gnus/auth-source.el (auth-source-epa-make-gpg-token): Replace an
>>       usage of `epg-context-set-armor' with `setf'.
> [...]
>> -    (epg-context-set-armor context t)
>> +    (setf (epg-context-armor context) t)

> This doesn't seem to be expanded properly when building Emacs:

> In end of data:
> gnus/auth-source.el:2145:1:Warning: the function `(setf epg-context-armor)' is
>     not known to be defined.

> How do we fix it?

I got:

Debugger entered--Lisp error: (void-function \(setf\ epg-context-armor\))

Recipe:

$ emacs -Q
load: lisp/gnus/auth-source.elc
eval: (auth-source-epa-make-gpg-token "foo" "bar")

To fix it, epg.el(c) is required when compiling auth-source.el,
I think.  Though once I merged the change to the Gnus git master,
I reverted it thereafter, since old Emacsen that Gnus supports do
not have the setf-method for epg-context-armor.

Regards,