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From: tmoran@bix.com (Tom Moran)
Subject: Re: PRECOMPILATION
Date: 1999/02/09
Message-ID: <36c0b3ad.367441@news.pacbell.net>#1/1
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References: <918556681.260459@dedale.pandemonium.fr>
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 09 Feb 1999 14:21:33 PDT)
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NNTP-Posting-Date: Tue, 09 Feb 1999 14:21:33 PDT
Newsgroups: comp.lang.ada
Date: 1999-02-09T00:00:00+00:00
List-Id: <comp.lang.ada>

>Are there precompilation instructions in Ada95,
>like in C (#ifdef,...etc) ? In other words, how can
>I set compilation conditions ?
  Most compilers are smart enough to delete code in a situation like:
  Sometimes : constant Boolean := False;
....
  if Sometimes then
    stuff;
  end if;
ie, if the optimizer knows "stuff" can never be executed, it will
simply drop it and the if-test.  
   Having worked on well known shrinkwrap software coded with the C
preprocessor, I would STRONGLY recommend against going that route.
Yes, it's just a tool, and judiciously used can be useful.  So's a
hydrogen bomb.