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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Running a preprocessor from GPS?
Date: Tue, 28 Jul 2015 08:23:26 +0100
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EGarrulo <egarrulo@gmail.com> writes:

> On Monday, July 27, 2015 at 11:14:35 PM UTC+2, Jeffrey R. Carter wrote:
>> Also, if the OP really thinks he has to replace those 3 lines with 1
>> line, he can define
>> 
>> procedure Checked_Trace (Me : in Whatever; Message : in String);
>> 
>> to do so.
>
> Thanks for the suggestion.  Actually, I had thought about this
> solution, but since messages are likely to be formatted, if they won't
> be logged then the time spent to format them will be wasted along with
> memory allocations.  But it seems that there are no simple
> alternatives.

GNAT has pragma Debug[1] for this purpose.

I never found much use for it, because it is enabled by -gnata, which is
the same switch used to control assertions. There are, I suspect, more
fine-grained methods of control now[2], but I've not needed to get to grips
with configuration pragmas.

[1] https://gcc.gnu.org/onlinedocs/gnat_rm/Pragma-Debug.html
[2] https://gcc.gnu.org/onlinedocs/gnat_rm/Pragma-Check_005fPolicy.html