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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Elaboration circularity with generics
Date: Sat, 14 Jan 2012 22:46:31 +0000
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Date: 2012-01-14T22:46:31+00:00
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AdaMagica <christ-usch.grein@t-online.de> writes:

> A unit can only be instantiated if it is fully elaborated.
> I guess GNAT chose the elaboration order P'Spec, P.Q'Spec, P'Body
> (crash since P.Q'body is not elaborated).
> This dependence is not present for nongeneric units.
>
> Perhaps addition of pragma Elaborate_Body to P.Q helps.

   with P.Q;
   pragma Elaborate (P.Q);          <<<<<<< does the trick for me
   package body P is

I have to say that elaboration problems are often mindboggling (the best
I remember was when GNAT 3.09 reported an elaboration cycle of 157 where
there were only 156 units in the program).