use SLIME/SDL2 from the VT

use SLIME/SDL2 from the VT

[Emanuel Berg via Users list for the GNU Emacs text editor]

Can you use SLIME/SDL2 from the Linux VT and pipe the graphics
to X, similar to what happens (sometimes) with the shell tools
if you set the DISPLAY=":0" environmental, or if the tool
comes with a -d option specifically for this (which SBCL
don't)?

The below attempt doesn't work, what happens is that with or
without it SBCL tries and actually manages to write something
to the VT framebuffer, but then crashes.

Can it be done?

(setq slime-lisp-implementations
      '((sbcl ("sbcl" "--core" "/home/incal/cl/sbcl.core-with-swank")
              :env ("DISPLAY=\":0\"")
              :init (lambda (port-file _)
                      (format "(swank:start-server %S)\n" port-file) ))))

-- 
underground experts united
https://dataswamp.org/~incal

Re: use SLIME/SDL2 from the VT

[Emanuel Berg via Users list for the GNU Emacs text editor]

> Can you use SLIME/SDL2 from the Linux VT and pipe the
> graphics to X, similar to what happens (sometimes) with the
> shell tools if you set the DISPLAY=":0" environmental, or if
> the tool comes with a -d option specifically for this (which
> SBCL don't)?
>
> The below attempt doesn't work, what happens is that with or
> without it SBCL tries and actually manages to write
> something to the VT framebuffer, but then crashes.
>
> Can it be done?
>
> (setq slime-lisp-implementations
>       '((sbcl ("sbcl" "--core" "/home/incal/cl/sbcl.core-with-swank")
>               :env ("DISPLAY=\":0\"")
>               :init (lambda (port-file _)
>                       (format "(swank:start-server %S)\n" port-file) ))))

I works with

  $ DISPLAY=":0" emacs -nw

Note the -nw, because without it, the whole Emacs instance
will be the GUI version, in X.

-- 
underground experts united
https://dataswamp.org/~incal

Re: use SLIME/SDL2 from the VT

[2QdxY4RzWzUUiLuE]

On 2021-07-04 at 22:45:17 +0200,
Emanuel Berg via Users list for the GNU Emacs text editor <help-gnu-emacs@gnu.org> wrote:

> > Can you use SLIME/SDL2 from the Linux VT and pipe the
> > graphics to X, similar to what happens (sometimes) with the
> > shell tools if you set the DISPLAY=":0" environmental, or if
> > the tool comes with a -d option specifically for this (which
> > SBCL don't)?
> >
> > The below attempt doesn't work, what happens is that with or
> > without it SBCL tries and actually manages to write
> > something to the VT framebuffer, but then crashes.
> >
> > Can it be done?
> >
> > (setq slime-lisp-implementations
> >       '((sbcl ("sbcl" "--core" "/home/incal/cl/sbcl.core-with-swank")
> >               :env ("DISPLAY=\":0\"")

Try:

    :env ("DISPLAY=:0")

> >               :init (lambda (port-file _)
> >                       (format "(swank:start-server %S)\n" port-file) ))))
> 
> I works with
> 
>   $ DISPLAY=":0" emacs -nw

In the shell, those quotes are part of shell syntax, not part of the
value of the DISPLAY variable.  That command works just as well as
follows:

    $ DISPLAY=:0 emacs -nw

> Note the -nw, because without it, the whole Emacs instance
> will be the GUI version, in X.