There is a small example on my FTP site that shows how to do this.
URL: ftp://ftp.ada95.com/pub/ada_from_c_main.tgz
or
URL: ftp://ftp.ada95.com/pub/ada_from_c_main.tar.gz



"Alejandro Villanueva" <190921@cepsz.unizar.es> wrote in message
news:39EF0DB2.35CED1C5@cepsz.unizar.es...
> Robert Dewar wrote:
>
> > In article <39EEF80B.1242805C@cepsz.unizar.es>,
> >   Alejandro Villanueva <190921@cepsz.unizar.es> wrote:
> > > I'm not sure if this is a good place to ask this but: how do I
> > call an
> > > Ada procedure from a C main program using GNAT 3.11p
> > >
> > > I followed the user's guide instructions but didn't work !!
> > >
> > > These are my files attached.
> > >
> > > Thanks!
> >
> > Mostly this is an implementation independent issue, look up
> > the use of the pragma Export in your Ada book ...
> >
> > Trying to use the internal GNAT stuff is wrong, and you
> > need to know too much to do this. The documentation in the
> > users guide is assuming that you use pragma Export, since
> > of course this is required by the Ada 95 language in this case
> >
> > Also, why use such an out of date version of GNAT?
> >
>
> Well, these are the steps I perform:
> gcc -c hola.adb
> gnatbind -x hola.ali
> gcc main.c b_hola.o hola.o
>
> I really think this is correct, but I get some interesting error
> messages about undefined symbols...
>
> Of course I use pragme Export (correctly, for sure).
>
> The reason I use 3.11p is because I'm working with GNAT/RTEMS to produce
> an embedded system. The RTEMS operating system only uses 3.11p at this
> momment :-(
>
> Do you think the above compilation chain is incorrect? I think I'm
> missing something but I don't know what could it be...
>
> Thanks again,
>
> Alejandro.
>
> >
> > Sent via Deja.com http://www.deja.com/
> > Before you buy.
>
> --
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> ------------------------------------------------------
> Alejandro Villanueva
> 190921@cepsz.unizar.es
> ------------------------------------------------------
>
>
>