Re: Compiled Octave 3.8.2 for Android. Plotting with gnuplot?

[Daniel J Sebald]

On 12/19/2014 10:30 PM, Forrest Carroll wrote:
> I've compiled Octave 3.8.2 and all of its' dependencies, as well as most
> of its' optional dependencies, minus hdf5 and Graphics Magick, for
> Android. Specifically, to run on an HTC One m8.
>
> Here's what I used for configure:
>
> --host=arm-cortexa9_neon-linux-gnueabihf
> --prefix=/home/shadowed/octave/native --disable-java --disable-gui
> --without-hdf5 --with-x=no --without-framework-carbon --without-opengl
> --without-framework-opengl --with-sysroot=/home/shadowed/octave/native
> --with-blas=/home/shadowed/octave/native/lib/libblas.a
> --with-lapack=/home/shadowed/octave/native/lib/liblapack.a
> host_alias=arm-cortexa9_neon-linux-gnueabihf
> LDFLAGS=-L/home/shadowed/octave/native/lib
> CPPFLAGS=-I/home/shadowed/octave/native/include
>
> It is nearly flawless. Nearly. I can't plot, or, more accurately, I
> can't set the default plotter.
>
> As far as I can tell, none of the options I've selected keep the
> finished binary from plotting with gnuplot, which I have set up to
> create a .png image (/sdcard2/plot.png). However, when I run:
>
>          octave: 1> graphics_toolkit("gnuplot")
>
> It returns:
>
>          error: 'graphics_toolkit' undefined near line 1 column 1

Well, clearly the script file graphics_toolkit isn't being found because 
some path setup isn't correct, or an installation is incomplete or 
something.

Can you locate the file graphics_toolkit.m somewhere in an installed 
directory on your system?  For example, on my system it ends up in:

/usr/local/share/octave/3.7.5/m/plot/graphics_toolkit.m

Beyond that, there are a bunch of things in your setup that could be an 
issue:

 --prefix=/home/shadowed/octave/native
[Could be an issue in the build that's not setting up the environment 
correctly.]

 --without-opengl
[Could be an issue in the build, libraries, configuration that leaves 
out all graphics.]

> --without-framework-opengl
[Same as above.]

 --with-sysroot=/home/shadowed/octave/native
[Another path issue possible whereby octave can't find the 
graphics_toolkit.m script file.]


> I can register gnuplot just fine, and it will show in the list of
> available graphics toolkits, but Octave refuses to load it.

How so?  Please show the command and list that is created for the toolkits.

Dan