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Newsgroups: comp.lang.ada
Date: Mon, 10 Dec 2018 14:58:39 -0800 (PST)
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Subject: Ada version cheat sheet (2012 vs. 2005 vs. '95 ...) ?
From: julian.fondren@gmail.com
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Xref: reader01.eternal-september.org comp.lang.ada:55007
Date: 2018-12-10T14:58:39-08:00
List-Id: <comp.lang.ada>

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.