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From: JJ <jayson.prichard@ngc.com>
Newsgroups: comp.lang.ada
Subject: Re: GNAT 2008 GPL pragma import VC++
Date: Tue, 27 Jan 2009 14:39:19 -0800 (PST)
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Date: 2009-01-27T14:39:19-08:00
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On Jan 27, 3:28=A0pm, sjw <simon.j.wri...@mac.com> wrote:
> On Jan 27, 7:30=A0pm, JJ <jayson.prich...@ngc.com> wrote:
>
> > I have an Ada program that has a pragma import to a Visual C++
> > procedure. =A0I have tried several combination's of External_Name (all
> > uppercase, all lowercase, mixed...) to no avail. =A0I continue to get a=
n
> > "undefined reference" error during the link.
>
> > Anyone have any experience with this?
>
> No experience with VC++; but you might be having problems with name
> mangling? (ie, the c++ compiler decorates the object name of the
> function with inscrutable encoding of the parameter/result profile,
> thus supporting overloading and possibly other features).
>
> You might try
> extern "C" {
> int foo(int *bar);
>
> }
>
> which (in GCC at any rate) will generate the symbol foo (or _foo, but
> at any rate something easier to manage).

One other thought... I am using GPS (Gnat Programming Studio) as my
IDE.  Right now I am using the -Idir_to_the_obj_file switch.  This
points to the VC++ object file created.  Is there something else that
I need in the build process?