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Newsgroups: comp.lang.ada
Date: Mon, 10 Dec 2018 16:12:15 -0800 (PST)
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Subject: Re: Ada version cheat sheet (2012 vs. 2005 vs. '95 ...) ?
From: Jere <jhb.chat@gmail.com>
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Xref: reader01.eternal-september.org comp.lang.ada:55009
Date: 2018-12-10T16:12:15-08:00
List-Id: <comp.lang.ada>

On Monday, December 10, 2018 at 5:58:41 PM UTC-5, julian....@gmail.com wrote:
> Howdy,
> 
> For my personal development environments, Ada 2012 is totally fine, and
> I know that some features I especially like require it ('with' pre/post
> conditions, for some/all expressions), but it's come up that it might
> benefit a project to be compileable by older compilers. For example,
> CentOS 6 only offers an Ada 2005 package.
> 
> Is there a cheat sheet of the form, "in place of this Ada 2012
> construct, you can use this Ada 2005 equivalent (or workaround)"?
> 
> Ada 2012:
> 
>    function getrusage (Who : Integer; Report : access RUsage) return Integer
>       with Import => True, Convention => C, External_Name => "getrusage";
> 
> Ada 2005:
> 
>    function getrusage (Who : Integer; Report : access RUsage) return Integer;
>    pragma Import (C, getrusage, "getrusage");
> 
> Or is my best bet to use an older compiler (or flag like -gnat05, where
> available), and then look in older versions of the ARM for what fails?
> 
> Thanks.

Here is the one that comes to mind.  Haven't combed through it to verify 
everything:
https://www.ada2012.org/comparison.html