Re: error: failed to install .mex file function `xyz'

[David Grohmann]

John W. Eaton wrote:
> On 21-Jun-2007, David Grohmann wrote:
>
> | I am writing a mex file for octave, but am getting this error when 
> | trying to load it. Is there a way to get a more specific error as to why 
> | it is not loading?
> | 
> | octave:1> which xyz
> | error: failed to install .mex file function `xyz'
> | which: `xyz' is undefined
> | octave:1> version
> | ans = 2.9.12
>
> What kind of system are you using?
>
> A MEX file is just a shared/dynamically loadable library.  The details of
> loading it depend on the type of system you are using.  Look in
> liboctave/oct-shlib.cc to see what Octave is doing when it loads a
> shared library.  For systems that use dlopen to perform this task, we
> have:
>
>       library = dlopen (file.c_str (), flags);
>
>       if (library)
>         stamp_time ();
>       else
>         {
>           const char *msg = dlerror ();
>
>           if (msg)
>             (*current_liboctave_error_handler) ("%s", msg);
>         }
>
> so I assume that dlerror is not returning anything.
>
> I agree that it would be nice to have more information about precisely
> what is failing, but I don't know how to get more information about
> the failure.  If there is something more we could do here, I'd
> consider patches.
>
> jwe
>   
Well the mex file wasn't built correctly, almost nothing was linked in. 
So I'm not sure if octave could have provided much of a better error 
after all.

--
David Grohmann
Senior Student Associate
Applied Research Lab : UT Austin : ESL - S206
Office: 512-835-3237