Re: (error "Window system frame should be used")

[Lars Brinkhoff]

Eli Zaretskii wrote:
>> I'm noting that "emacs -nw" can make a graphical frame, but "emacs
>> -batch" can not.
> "emacs -nw" can _display_ a GUI frame.  In batch sessions, we don't
> display anything, because it's a non-interactive invocation.  Batch
> sessions have a frame of a special type, which is neither a TTY frame
> nor a GUI frame.

It's interesting to try.  In non-interactive mode, `make-frame' crashes
with "I/O possible" (receiving a SIGIO I guess) when making a GUI frame,
and segmentation fault when making a TTY frame.

I.e.

emacs -batch -eval "(make-frame '((display . \":0\")))"
emacs -batch -eval "(make-frame '((tty-type . \"xterm\")))"