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NNTP-Posting-Date: Sun, 28 Jul 2019 19:05:53 -0500
Subject: Re: GNAT Community 2019 is here!
Newsgroups: comp.lang.ada
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Xref: reader01.eternal-september.org comp.lang.ada:56977
Date: 2019-07-28T18:05:52-06:00
List-Id: <comp.lang.ada>

gautier_niouzes@hotmail.com wrote:
>> unfortunately GNAT Community 2019 ist no longer able to compile code of old Ada Versions
> 
> It does: just remove the -gnat83, -gnat95 or -gnat05 switches.
> 
> What the disappearance of the switches mean is that you cannot anymore downgrade GNAT to a "Ada 83 only", "Ada 95 only" or a "Ada 2005 only" compiler.
> 
Unfortunately, there are many incompatibilities between Ada83 and later 
versions.  There are also some between Ada2012 and almost all earlier 
versions.  Therefore, it may not be possible to correctly compile code 
written for earlier versions with the newest compiler.  The switches are 
useful for maintenance programmers.