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NNTP-Posting-Date: Wed, 16 Mar 2005 16:16:18 -0600
From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
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Subject: Re: combine Ada with MS VS C++
Date: Wed, 16 Mar 2005 16:18:40 -0600
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Date: 2005-03-16T16:18:40-06:00
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"Ludovic Brenta" <ludovic.brenta@insalien.org> wrote in message
news:87hdjb5kqd.fsf@insalien.org...
> writes:
...
> I don't program on Windows, so I can't help you with the exporting
> from Ada.  You may need to use all three arguments to pragma Export in
> order to get the link name right; this is the platform-dependent part.
> So you'd say something like:
>
> procedure Check_Buffer (vr, vl : in out Interfaces.C.double);
> pragma Export (Convention => C, Entity => Check_Buffer,
>                External_Name => "CheckBuffer", -- this is...
>                Link_Name => "something");      -- ...the hard part

I'd leave out the link name part. The intent is that you specify *either*
the link name *or* the external name. The external name is the name as it
appears in C. I think all Windows Ada compilers can generate the link name
from that name; certainly we only used the External_Name in Claw to link to
Win32.

This only works if you turn off name-mangling as suggested in the previous
response. You could use the link name instead to manually provide the
mangled name, but that seems like a lot of work for little gain.

                  Randy.