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From: Stephen Leake <stephen_leake@stephe-leake.org>
Newsgroups: comp.lang.ada
Subject: Re: Make specific warning error with gnat?
References: <i0hpoh$vmk$1@nntp.ilk.net> <82mxuaxmb1.fsf@stephe-leake.org>
 	<i0kcdn$g44$1@nntp.ilk.net>
Date: Sat, 03 Jul 2010 04:01:43 -0400
Message-ID: <82aaq9xac8.fsf@stephe-leake.org>
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Date: 2010-07-03T04:01:43-04:00
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Markus Schoepflin <nospam@no.spam> writes:

> Am 02.07.2010 11:30, schrieb Stephen Leake:
>
>> Markus Schoepflin<nospam@no.spam>  writes:
>
> [...]
>
>>> Is this possible with gnat without turning all warnings into errors?
>>
>> Just out of curiosity, why not treat all warnings as errors?
>>
>> gnat is a very good compiler; the warnings it produces should be taken
>> seriously.
>
> I would love to, but I'm dealing with a multi-million LOC legacy code
> base of Ada 83 in maintenance mode, which produces quite a large
> number of warnings.
>
> I neither have the time nor the resources available to fix all of
> them, nor am I allowed to do so. 

I can understand not changing design in a maintenance situation, but
adding 'pragma Warnings (off)' in places ought to be ok. Still, it can
be a lot of work.

> But if the compiler already knows that there will be a constraint
> error at runtime, I would have liked the compilation to fail.

Using GNAT project files, you can specify -gnatwe for particular files:

      for Switches ("sal-gen-alg.adb") use
        Standard_Common.Compiler'Default_Switches ("Ada") &
        Standard_Common.Compiler.Release_Switches & ("-gnatwe");

Not quite what you want, but it might help.

-- 
-- Stephe