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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Build language with weak typing,
 then add scaffolding later to strengthen it?
Date: Sat, 23 May 2015 18:48:57 +0100
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Date: 2015-05-23T18:48:57+01:00
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"Jeffrey R. Carter" <spam.jrcarter.not@spam.not.acm.org> writes:

> On 05/23/2015 04:14 AM, Peter Chapin wrote:
>> On Fri, 22 May 2015, Jeffrey R. Carter wrote:
>> 
>>> GNAT, for example, by default is not an Ada compiler.
>> 
>> Is this still true? The latest GNAT has overflow checking on by
>> default... or are there other issues?
>
> GNAT has generally required -gnata to activate assertion checks,
> -gnatn to activate cross-pkg inlining, -gnato to activate overflow
> checks, -fstack-check to give Storage_Error rather than a segfault,
> and -gnatE to use the ARM dynamic elaboration checks. Even if overflow
> checking is now on by default, I suspect GNAT is still not an Ada
> compiler by default.

-gnato, -fstack-check: point taken.

-gnata: pretty sure that pragma Assertion_Policy is implemented? but
 just using -gnata is a lot easier.

-gnatn: does the language require this?

-gnatE: static elaboration checks are so clearly the Right Thing I'm
 surprised the ARM hasn't legalised them!