Re: GNAT internals question

["David C. Hoos, Sr." <david.c.hoos.sr@ada95.com>]

The binder does not generate the "AMEB" -- the compiler generates it
as a result of compiling the Ada_Main package of which the _source_code_
was generated by the binder.

Further, consider that the function Ada_Main.main is exported as the
C main function which is called by the C runtime start-up code.

The C runtime startup code knows nothing about Ada, so wouldn't call
the "AMEB," and you can see in the source code of the Ada_Main.main
function everything that is done, showing that nowhere is the "AMEB"
called.

----- Original Message ----- 
From: "sk" <noname@myob.com>
To: <comp.lang.ada@ada.eu.org>
Sent: June 26, 2002 5:28 PM
Subject: Re: GNAT internals question


> Hi,
> 
> "David C. Hoos" <david.c.hoos.sr@ada95.com>
> > Am I making this clear?
> 
> I think you are saying that "ada_main___elabb" is a stub 
> which is never called and that I do not need to worry 
> about it ?
> 
> My unease arises since the AMEB issue is out of user-domain 
> control and vaguely fits into the virtual "environment task"
> domain (a very very sketchy comprehension of the LRM), that 
> this is implementation defined and therefore under some 
> circumstances GNAT might use it. 
> 
> The "environment task", as established by the link process 
> and the gnat-run-time-library, is far greater than the Ada 
> main which has the structure
> 
>     adainit
>     call my-code
>     adafinal
> 
> with AMEB floating around somewhere.
> 
> Perhaps the AMEB is called by some of the "implementation
> defined" "environment task" and run-time libraries prior
> to invoking the Ada main ?
> 
> If this is all irrelevent, as you suggest, the question
> then becomes one of why does gnatbind create AMEB then ?
> 
> As an aside, I am not trying to control AMEB, just to 
> account for it and ensure that I do not mistakenly 
> ignore it when loading an Ada main outside of a
> standard OS context.
> 
> -- 
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> -------------------------------------
> s n p @ t . o
>  k i e k c c m
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