Hi Peng - I see this too.  I think one can create a startup file that
does "graphics_toolkit gnuplot" or "graphics_toolkit fltk" which should
take care of the issue.  See
< http://www.gnu.org/software/octave/doc/interpreter/Startup-Files.html
>.  There is probably a way to fix this in octave-devel itself, but
since it seems harmless otherwise, and I have bigger fish to fry just
right now, I'll leave this as a task for someone else; or file a ticket
and I'll try to get to it sometime. - MLD

On Aug 31, 2012, at 5:54 PM, Peng Yu <[email protected]> wrote:

  I get the following warning. Is there a compile option should
  be enabled for octave?
  ~$ /opt/local/bin/octave -q
  warning: no graphical display found
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