From help-octave-request at bevo dot che dot wisc dot edu Mon Dec 22 20:15:42 2003
Subject: Re: How to use octave-forge?
From: "Henry F. Mollet" <mollet at pacbell dot net>
To: Geraint Paul Bevan <g dot bevan at mech dot gla dot ac dot uk>
CC: Octave_post <help-octave at bevo dot che dot wisc dot edu>
Date: Mon, 22 Dec 2003 18:14:03 -0800

GNU Octave, version 2.1.46 (powerpc-apple-darwin6.8).
Many thanks. Apparently my version of Octave does not support dynamic
linking and I cannot even create an .oct file at the shell prompt.

[Henry-Mollets-Computer:doc/octave/examples] mollet% mkoctfile oregonator.cc
/var/tmp//ccT8XOce.s:unknown:FATAL:can't create output file: oregonator.o

octave:1> octave_config_info ("dld")
ans = 0

Why does my Dec 2003 Fink installation from source not provide for dynamic
linking? What did I do wrong? What needs to be done to support dynamic
linking?
Henry 


on 12/22/03 4:23 PM, Geraint Paul Bevan at g dot bevan at mech dot gla dot ac dot uk wrote:

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> Henry F. Mollet wrote:
> | Given oregonator.cc why would I create oregonator.oct? Why not compile
> with
> | gcc and then run a.out at the shell prompt instead of oregonator at the
> | Octave prompt? Thanks.
> | Henry
> |
> |
> 
> The oregonator.cc file doesn't contain a "main" function so it will not
> run as a standalone executable.
> 
> It is of course possible to write a short main() function to call it. To
> call the existing oregonator function, you should be aware that the
> DEFUN_DLD macro prepends F to the function name, hence oregonator
> expands to "Foregonator", and has a return type "octave_value_list".
> 
> To compile using g++ directly, you would need to link to the Octave
> library (liboctave) and other libraries on which this depends (such as
> libkpathsea). Thankfully, it is no longer necessary to specify all the
> libraries manually, the "mkoctfile" script now contains a
> - --link-stand-alone option that takes care of the linking and include
> paths for you.
> 
> - --
> Geraint Bevan
> http://homepage.ntlworld.com/geraint.bevan
> 
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