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From: "David C. Hoos, Sr." <david.c.hoos.sr@ada95.com>
Newsgroups: comp.lang.ada
References: <01c0b063$c08079b0$668e4991@pc1944>
Subject: Re: newbie: Problem with calling functions in shared library
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NNTP-Posting-Date: Mon, 19 Mar 2001 04:48:46 PST
Date: Mon, 19 Mar 2001 06:48:53 -0600
Xref: supernews.google.com comp.lang.ada:5838
Date: 2001-03-19T06:48:53-06:00
List-Id: <comp.lang.ada>

This sounds like there is elaboration code in the Ada shared library unit
that is not
getting called before the subprograms in the library.

There may be a symbol like _<unit-name>___elabb and/or _<unit-name>___elabs,
that need to be called before calling any of the subprograms in the library.


"Fokker Space" <F.Space@fokkerspace.nl> wrote in message
news:01c0b063$c08079b0$668e4991@pc1944...
> I have a question regarding Ada and libraries with the use of GNAT. We
have
> the following situation under operating system IRIX:
>
> 1) Ada source without main routine -> compile with gnatmake or gcc -> Get
a
> <name>.o file
> 2) Link the <name>.o file to a shared library <name>.so with the use of
> gnatlink
> 3) An exe (from a C-source) loads the shared library with the
> dlopen-function.
> 4) The exe determines the places of procedures and functions in the shared
> library with the dlsym-function and calls them.
>
> The problem is that I keep getting crashes when calling the functions in
> the shared library. When I compile the same Ada source with the C-source
> into a seperate exe the problem doesn't occur. I suspect I am compiling or
> linking the shared library with the wrong flags or something like that.
>
> Does anybody know what to do it this situation or (even better) have a
> small example of a working program?
>
> Bart Schipperijn