RE: Segmentation fault when compiling octave

[Feuerbacher, Alan]

Jordi wrote:

> > I don't understand. Do exactly what with fltk?
> 
> Use fltk instead of gnuplot, do "graphics_toolkfit fltk" before
> attempting the surf demo. Try other demos, try to invert a large
> matrix, paste one of your Octave scripts into this instance running
> under gdb, try to make it crash...

Ok, the problem went away after I installed Mesa-8.0.4 along with a big pile of 
dependencies.

However, now I get an error when I try to plot something. That's true whether I 
use Octave compiled with or without opengl. With either version I get exactly 
the same error. Whether I do something simple like

aa=[1,2,3,4]
plot(aa,aa.^2)

or more demanding like

demo surf

I get this error:

####################################
octave:1> demo surf
surf example 1:
 clf
 [~,~,Z] = peaks;
 surf (Z);


gnuplot> set obj 1 rectangle from screen 0,0 to screen 1,1 behind fc rgb 
"#ffffff"
             ^
         line 0: valid set options:  [] = choose one, {} means optional

        'angles', 'arrow', 'autoscale', 'bars', 'border', 'boxwidth',
        'clabel', 'clip', 'cntrparam', 'colorbox', 'contour', 'decimalsign',
        'dgrid3d', 'dummy', 'encoding', 'fit', 'format', 'grid',
        'hidden3d', 'historysize', 'isosamples', 'key', 'label', 'locale',
        'logscale', '[blrt]margin', 'mapping', 'mouse', 'multiplot',
        'offsets', 'origin', 'output', 'palette', 'parametric', 'pm3d',
        'pointsize', 'polar', 'print', '[rtuv]range', 'samples', 'size',
        'style', 'surface', 'terminal', tics', 'ticscale', 'ticslevel',
        'timestamp', 'timefmt', 'title', 'view', '[xyz]{2}data',
        '[xyz]{2}label', '[xyz]{2}range', '{no}{m}[xyz]{2}tics',
        '[xyz]{2}[md]tics', '{[xyz]{2}}zeroaxis', 'zero'

         line 0: undefined variable: linecolor


gnuplot> if (exists("GPVAL_TERM")) print GPVAL_TERM; else print NaN
                    ^
         line 0: invalid expression 

error: Invalid call to strcat.  Correct usage is:

 -- Function File:  strcat (S1, S2, ...)
 
error: called from:
error:   
/home/afbacher/GCC/Octave/exp38/octave-3.6.3/scripts/help/print_usage.m at line 
87, column 5
error:   /home/afbacher/GCC/Octave/exp38/octave-3.6.3/scripts/strings/strcat.m 
at line 92, column 5
error:   
/home/afbacher/GCC/Octave/exp38/octave-3.6.3/scripts/plot/private/__gnuplot_get_var__.m
 at line 113, column 11
error:   
/home/afbacher/GCC/Octave/exp38/octave-3.6.3/scripts/plot/private/__go_draw_axes__.m
 at line 40, column 18
error:   
/home/afbacher/GCC/Octave/exp38/octave-3.6.3/scripts/plot/private/__go_draw_figure__.m
 at line 167, column 19
error:   
/home/afbacher/GCC/Octave/exp38/octave-3.6.3/scripts/plot/__gnuplot_drawnow__.m 
at line 86, column 5
error: input: reading user-input failed!
error:   /home/afbacher/GCC/Octave/exp38/octave-3.6.3/scripts/testfun/demo.m at 
line 119, column 7
octave:1> quit
####################################

Any clue what's going on?

In the past few weeks I've successfully compiled octave without opengl and 
plotting worked just fine. Would it do any good to post the old and latest 
configure statements?

Alan