bug#47318: 26.3; Modules on Emacs 26.3 broken?

bug#47318: 26.3; Modules on Emacs 26.3 broken?

[Sanel Zukan]

Hi guys,

I'm getting this [1] error from freshly compiled Emacs 26.3 and
vterm-module.

Also, emacs-eject [2] and very simple module [3] fails on 26.3 with the
similar error. However, they are working fine on 27.1.

Any idea what could go wrong? I also tried to run bare Emacs with
'emacs -Q'. In the all cases, Emacs is compiled with modules support.

[1] https://github.com/akermu/emacs-libvterm/issues/181
[2] https://github.com/syohex/emacs-eject
[3] http://diobla.info/blog-archive/modules-tut.html

Best regards,
Sanel



In GNU Emacs 26.3 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.18.9)
 of 2021-03-21 built on darkstar
Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Quit
Directory ~/programs/emacs/emacs-eject/
Scanning for dabbrevs...done
user-error: No dynamic expansion for ‘add-to-li’ found
Mark set
Quit
Entering debugger...
: is undefined
Back to top level

Configured using:
 'configure --prefix=/opt/emacs-26.3 --with-modules --without-gconf
 --without-gsettings'

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GLIB NOTIFY ACL
GNUTLS LIBXML2 FREETYPE XFT ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM
MODULES THREADS LCMS2

Important settings:
  value of $LC_COLLATE: C
  value of $LC_CTYPE: en_US.utf8
  value of $LC_MESSAGES: en_US.utf8
  value of $LC_MONETARY: en_US.utf8
  value of $LC_NUMERIC: en_US.utf8
  value of $LC_TIME: en_US.utf8
  value of $LANG: en_US.utf8
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  ido-vertical-mode: t
  diff-auto-refine-mode: t
  global-undo-tree-mode: t
  undo-tree-mode: t
  evil-mode: t
  evil-local-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Load-path shadows:
~/.emacs.d/modes/async hides ~/.emacs.d/elpa/async-1.9.3/async
~/.emacs.d/modes/dired-async hides ~/.emacs.d/elpa/async-1.9.3/dired-async
~/.emacs.d/evil/lib/ert hides ~/programs/emacs/emacs-26.3/lisp/emacs-lisp/ert

Features:
(shadow sort gnus-alias mail-extr emacsbug sendmail cl-print debug
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mail-prsvr org-protocol org-element avl-tree generator org org-macro
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term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe
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Memory information:
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 (symbols 48 35102 2)
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 (string-bytes 1 2396355)
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 (heap 1024 34263 1706))

bug#47318: 26.3; Modules on Emacs 26.3 broken?

[Philipp Stephani]

Am Mo., 22. März 2021 um 14:14 Uhr schrieb Sanel Zukan <sanelz@gmail.com>:
>
> Hi guys,
>
> I'm getting this [1] error from freshly compiled Emacs 26.3 and
> vterm-module.
>
> Also, emacs-eject [2] and very simple module [3] fails on 26.3 with the
> similar error. However, they are working fine on 27.1.
>
> Any idea what could go wrong? I also tried to run bare Emacs with
> 'emacs -Q'. In the all cases, Emacs is compiled with modules support.
>
> [1] https://github.com/akermu/emacs-libvterm/issues/181
> [2] https://github.com/syohex/emacs-eject
> [3] http://diobla.info/blog-archive/modules-tut.html
>

https://debbugs.gnu.org/cgi/bugreport.cgi?bug=30164 is probably at
least part of the answer.
However, loading modules in general should still work, even in Emacs
26. Do you also get errors when loading the module file directly with
`load' instead of `require'?

bug#47318: 26.3; Modules on Emacs 26.3 broken?

[Sanel Zukan]

Hi Philipp,

Thanks for your fast reply. I tried that; it will return 't,' but no
symbols are visible in Emacs. Tried with modules-tut [3] example and
emacs-libvterm.

Any idea what could go wrong?

Best regards,
Sanel

Philipp Stephani <p.stephani2@gmail.com> writes:
> Am Mo., 22. März 2021 um 14:14 Uhr schrieb Sanel Zukan <sanelz@gmail.com>:
>>
>> Hi guys,
>>
>> I'm getting this [1] error from freshly compiled Emacs 26.3 and
>> vterm-module.
>>
>> Also, emacs-eject [2] and very simple module [3] fails on 26.3 with the
>> similar error. However, they are working fine on 27.1.
>>
>> Any idea what could go wrong? I also tried to run bare Emacs with
>> 'emacs -Q'. In the all cases, Emacs is compiled with modules support.
>>
>> [1] https://github.com/akermu/emacs-libvterm/issues/181
>> [2] https://github.com/syohex/emacs-eject
>> [3] http://diobla.info/blog-archive/modules-tut.html
>>
>
> https://debbugs.gnu.org/cgi/bugreport.cgi?bug=30164 is probably at
> least part of the answer.
> However, loading modules in general should still work, even in Emacs
> 26. Do you also get errors when loading the module file directly with
> `load' instead of `require'?

bug#47318: 26.3; Modules on Emacs 26.3 broken?

[Philipp]

> Am 23.03.2021 um 22:41 schrieb Sanel Zukan <sanelz@gmail.com>:
> 
> Hi Philipp,
> 
> Thanks for your fast reply. I tried that; it will return 't,' but no
> symbols are visible in Emacs. Tried with modules-tut [3] example and
> emacs-libvterm.

Could you please explain precisely what you're trying to do, starting from 'emacs -Q'?  Thanks.

> 
> Any idea what could go wrong?
> 
> Best regards,
> Sanel
> 
> Philipp Stephani <p.stephani2@gmail.com> writes:
>> Am Mo., 22. März 2021 um 14:14 Uhr schrieb Sanel Zukan <sanelz@gmail.com>:
>>> 
>>> Hi guys,
>>> 
>>> I'm getting this [1] error from freshly compiled Emacs 26.3 and
>>> vterm-module.
>>> 
>>> Also, emacs-eject [2] and very simple module [3] fails on 26.3 with the
>>> similar error. However, they are working fine on 27.1.
>>> 
>>> Any idea what could go wrong? I also tried to run bare Emacs with
>>> 'emacs -Q'. In the all cases, Emacs is compiled with modules support.
>>> 
>>> [1] https://github.com/akermu/emacs-libvterm/issues/181
>>> [2] https://github.com/syohex/emacs-eject
>>> [3] http://diobla.info/blog-archive/modules-tut.html
>>> 
>> 
>> https://debbugs.gnu.org/cgi/bugreport.cgi?bug=30164 is probably at
>> least part of the answer.
>> However, loading modules in general should still work, even in Emacs
>> 26. Do you also get errors when loading the module file directly with
>> `load' instead of `require'?

bug#47318: 26.3; Modules on Emacs 26.3 broken?

[Sanel Zukan]

Philipp <p.stephani2@gmail.com> writes:
> Could you please explain precisely what you're trying to do, starting from 'emacs -Q'?  Thanks.

Sure! I'm going to use that mymod example.

 1. Start emacs 26.3 with:
    "~/programs/emacs/emacs-26.3/src/emacs -Q"

 2. Run in *scratch* (or minibuffer):
    (load "/home/sanel/programs/emacs/module-test/mymod.so")

 Loading without ".so" extesions also works.

 3. This will return 't'.

 4. After mymod.so is loaded, 'mymod-test' function should be defined.

 5. In *scratch* or minibuffer, running: (fboundp 'mymod-test) => nil.

Also, evaliuating '(mymod-test)' will throw this error:

  Debugger entered--Lisp error: (void-function mymod-test)
    (mymod-test)
    eval((mymod-test) nil)
    elisp--eval-last-sexp(t)
    eval-last-sexp(t)
    eval-print-last-sexp(nil)
    funcall-interactively(eval-print-last-sexp nil)
    call-interactively(eval-print-last-sexp nil nil)
    command-execute(eval-print-last-sexp)


Replicating the same steps in emacs 27.2, in the step 4. it will
return 't' and when '(mymod-test)' is called, it will return 42.

Best regards,
Sanel

>> 
>> Any idea what could go wrong?
>> 
>> Best regards,
>> Sanel
>> 
>> Philipp Stephani <p.stephani2@gmail.com> writes:
>>> Am Mo., 22. März 2021 um 14:14 Uhr schrieb Sanel Zukan <sanelz@gmail.com>:
>>>> 
>>>> Hi guys,
>>>> 
>>>> I'm getting this [1] error from freshly compiled Emacs 26.3 and
>>>> vterm-module.
>>>> 
>>>> Also, emacs-eject [2] and very simple module [3] fails on 26.3 with the
>>>> similar error. However, they are working fine on 27.1.
>>>> 
>>>> Any idea what could go wrong? I also tried to run bare Emacs with
>>>> 'emacs -Q'. In the all cases, Emacs is compiled with modules support.
>>>> 
>>>> [1] https://github.com/akermu/emacs-libvterm/issues/181
>>>> [2] https://github.com/syohex/emacs-eject
>>>> [3] http://diobla.info/blog-archive/modules-tut.html
>>>> 
>>> 
>>> https://debbugs.gnu.org/cgi/bugreport.cgi?bug=30164 is probably at
>>> least part of the answer.
>>> However, loading modules in general should still work, even in Emacs
>>> 26. Do you also get errors when loading the module file directly with
>>> `load' instead of `require'?

bug#47318: 26.3; Modules on Emacs 26.3 broken?

[Philipp Stephani]

Am Sa., 27. März 2021 um 18:53 Uhr schrieb Sanel Zukan <sanelz@gmail.com>:
>
>
> Philipp <p.stephani2@gmail.com> writes:
> > Could you please explain precisely what you're trying to do, starting from 'emacs -Q'?  Thanks.
>
> Sure! I'm going to use that mymod example.
>
>  1. Start emacs 26.3 with:
>     "~/programs/emacs/emacs-26.3/src/emacs -Q"
>
>  2. Run in *scratch* (or minibuffer):
>     (load "/home/sanel/programs/emacs/module-test/mymod.so")
>
>  Loading without ".so" extesions also works.
>
>  3. This will return 't'.
>
>  4. After mymod.so is loaded, 'mymod-test' function should be defined.
>
>  5. In *scratch* or minibuffer, running: (fboundp 'mymod-test) => nil.
>
> Also, evaliuating '(mymod-test)' will throw this error:
>
>   Debugger entered--Lisp error: (void-function mymod-test)
>     (mymod-test)
>     eval((mymod-test) nil)
>     elisp--eval-last-sexp(t)
>     eval-last-sexp(t)
>     eval-print-last-sexp(nil)
>     funcall-interactively(eval-print-last-sexp nil)
>     call-interactively(eval-print-last-sexp nil nil)
>     command-execute(eval-print-last-sexp)
>

I can't reproduce that, sorry. Both the fboundp check and calling the
function work as expected for me. I've compiled the module as
described in http://diobla.info/blog-archive/modules-tut.html.

>
> Replicating the same steps in emacs 27.2, in the step 4. it will
> return 't' and when '(mymod-test)' is called, it will return 42.
>
> Best regards,
> Sanel
>
> >>
> >> Any idea what could go wrong?
> >>
> >> Best regards,
> >> Sanel
> >>
> >> Philipp Stephani <p.stephani2@gmail.com> writes:
> >>> Am Mo., 22. März 2021 um 14:14 Uhr schrieb Sanel Zukan <sanelz@gmail.com>:
> >>>>
> >>>> Hi guys,
> >>>>
> >>>> I'm getting this [1] error from freshly compiled Emacs 26.3 and
> >>>> vterm-module.
> >>>>
> >>>> Also, emacs-eject [2] and very simple module [3] fails on 26.3 with the
> >>>> similar error. However, they are working fine on 27.1.
> >>>>
> >>>> Any idea what could go wrong? I also tried to run bare Emacs with
> >>>> 'emacs -Q'. In the all cases, Emacs is compiled with modules support.
> >>>>
> >>>> [1] https://github.com/akermu/emacs-libvterm/issues/181
> >>>> [2] https://github.com/syohex/emacs-eject
> >>>> [3] http://diobla.info/blog-archive/modules-tut.html
> >>>>
> >>>
> >>> https://debbugs.gnu.org/cgi/bugreport.cgi?bug=30164 is probably at
> >>> least part of the answer.
> >>> However, loading modules in general should still work, even in Emacs
> >>> 26. Do you also get errors when loading the module file directly with
> >>> `load' instead of `require'?

bug#47318: 26.3; Modules on Emacs 26.3 broken?

[Sanel Zukan]

Philipp Stephani <p.stephani2@gmail.com> writes:
> I can't reproduce that, sorry. Both the fboundp check and calling the
> function work as expected for me. I've compiled the module as
> described in http://diobla.info/blog-archive/modules-tut.html.

Hm... any idea how this can be further debugged? In that mymod.c
example, I've added couple of puts() and all loading functions are run
properly.

I'm on slack 14.2 with kernel 5.9.1 x86_64, gcc 5.5.0. Not sure if this
makes any difference...

Best,
Sanel

>> Replicating the same steps in emacs 27.2, in the step 4. it will
>> return 't' and when '(mymod-test)' is called, it will return 42.
>>
>> Best regards,
>> Sanel
>>
>> >>
>> >> Any idea what could go wrong?
>> >>
>> >> Best regards,
>> >> Sanel
>> >>
>> >> Philipp Stephani <p.stephani2@gmail.com> writes:
>> >>> Am Mo., 22. März 2021 um 14:14 Uhr schrieb Sanel Zukan <sanelz@gmail.com>:
>> >>>>
>> >>>> Hi guys,
>> >>>>
>> >>>> I'm getting this [1] error from freshly compiled Emacs 26.3 and
>> >>>> vterm-module.
>> >>>>
>> >>>> Also, emacs-eject [2] and very simple module [3] fails on 26.3 with the
>> >>>> similar error. However, they are working fine on 27.1.
>> >>>>
>> >>>> Any idea what could go wrong? I also tried to run bare Emacs with
>> >>>> 'emacs -Q'. In the all cases, Emacs is compiled with modules support.
>> >>>>
>> >>>> [1] https://github.com/akermu/emacs-libvterm/issues/181
>> >>>> [2] https://github.com/syohex/emacs-eject
>> >>>> [3] http://diobla.info/blog-archive/modules-tut.html
>> >>>>
>> >>>
>> >>> https://debbugs.gnu.org/cgi/bugreport.cgi?bug=30164 is probably at
>> >>> least part of the answer.
>> >>> However, loading modules in general should still work, even in Emacs
>> >>> 26. Do you also get errors when loading the module file directly with
>> >>> `load' instead of `require'?

bug#47318: 26.3; Modules on Emacs 26.3 broken?

[Lars Ingebrigtsen]

Sanel Zukan <sanelz@gmail.com> writes:

> I'm getting this [1] error from freshly compiled Emacs 26.3 and
> vterm-module.
>
> Also, emacs-eject [2] and very simple module [3] fails on 26.3 with the
> similar error. However, they are working fine on 27.1.

(I'm going through old bug reports that unfortunately weren't resolved
at the time.)

Since this was fixed in Emacs 27.1, there doesn't seem to be anything
further to be done here on the Emacs side, so I'm closing this bug
report.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no