From octave-maintainers-request at bevo dot che dot wisc dot edu Fri Dec 13 15:18:58 2002
Subject: Creating a standalone executable
From: JD Cole <jdcole at san dot rr dot com>
To: octave-maintainers at bevo dot che dot wisc dot edu
CC: Paul Kienzle <pkienzle at jazz dot ncnr dot nist dot gov>
Date: Fri, 13 Dec 2002 12:37:46 -0800

I am trying to write a standalone application using the Octave API and 
am running into some trouble when I actually run the application. Here's 
what I did:

source code (a.cc)
=========
#include <octave/oct.h>

#include <iostream>

using namespace std;

int main(int argc, char *argv[])
{
  octave_value a(10.0),b(20.0),c;

  c = a + b;

  c.print(cout);
 
  return (0);
}

how I compiled it
=============
Initially I tried using the "--link-stand-alone" argument to mkoctfile, 
but it seemed to be missing the library arguments "-lkpathsea 
-loctinterp" or else I get missing symbols related to these two libraries.

So I used "mkoctfile -c a.cc -o a.o" to copile the object file and then 
added the above libraries to the output of "mkoctfile --verbose -o a 
a.o". Which seems to compile just fine.

when I ran it
=========
Running "./a" yields the following output:

fatal: range error in Array3

This error comes from "checkelem" in Arrray3.h. Of course, to my 
knowledge, I'm only using scalars. I tried changing my source to just "c 
= a" rather than "c = a +b" and it performed as expected. I investigated 
the operator instantiations of "+" in ov.h and was a bit confused.

Another note: I did try putting the above code into a DLD_FUNTION and it 
performed as expected.

I guess my question here is, "Has anyone done this before?"

Best,

JD