Re: {Spam?} Re: Build failure: Re: tramp "too many open files"

[Madhu <enometh@meer.net>]

* Michael Albinus <87353z75i7.fsf @gmx.de> :
Wrote on Sun, 14 May 2023 09:10:24 +0200:
> Madhu <enometh@meer.net> writes:
>> This now results in a build failure -- on master a7dcc0d55c6
>> ```
>> ../../lisp/net/tramp-adb.el:231:22: Warning: the function
>> ‘tramp-compat-string-replace’ might not be defined at runtime.
>> ../../lisp/net/tramp-adb.el:215:6: Warning: the function
>> ‘tramp-run-real-handler’ might not be defined at runtime.
>>   ELC      net/tramp-archive.elc
>>
>> In toplevel form:
>> ../../lisp/net/tramp-archive.el:113:2: Error: D-Bus error: "No
>> connection to bus", :system
>> make[3]: *** [Makefile:328: net/tramp-archive.elc] Error 1
>> ```
>
> This looks like you have copied one (or more) Tramp files from its
> repository into the Emacs tree. That doesn't work, there are subtle
> dependencies between the files of a Tramp release.
>
> If you want to use the new functionality, you must install Tramp from
> its git repository in parallel, and adapt load-path accordingly. See
> (info "(tramp) Obtaining TRAMP")
>
> Or you use Emacs cloned from its git repository.

Hmm, This was on regular* checkout of the emacs master.  I don't think
there are tramp files from the repository involved here.  (I did do a
git checkout of the tramp repo from a month ago, but I'm sure its not
in any paths related to this emacs)

(* local patches, none related to tramp)

To produce the error I built emacs without a system bus (as mentioned
upthread) I haven't looked too closely but I was able to work around it
with.

```
diff --git a/lisp/net/tramp-gvfs.el b/lisp/net/tramp-gvfs.el
index e3b42acfed5..31d563f0b89 100644
--- a/lisp/net/tramp-gvfs.el
+++ b/lisp/net/tramp-gvfs.el
@@ -2537,7 +2537,8 @@ tramp-gvfs-parse-device-names
   (let ((tramp-verbose 0)
        tramp-gvfs-dbus-event-vector fun)
     (when (and (autoload 'zeroconf-init "zeroconf")
-              (tramp-compat-funcall 'dbus-get-unique-name :system))
+              (ignore-errors
+              (tramp-compat-funcall 'dbus-get-unique-name :system)))
       ;; Add completion functions for services announced by DNS-SD.
       ;; See <http://www.dns-sd.org/ServiceTypes.html> for valid service types.
       (zeroconf-init tramp-gvfs-zeroconf-domain)
```

I haven't tried building without a session bus yet.