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From: emery@D74SUN.MITRE.ORG (David Emery)
Newsgroups: comp.lang.ada
Subject: Re: Ada portability
Message-ID: <9011141704.AA02565@d74sun.mitre.org>
Date: 14 Nov 90 17:04:32 GMT
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List-Id: <comp.lang.ada>

The answer to your question is indeterminate.  It is very possible to
write completely non-portable Ada, and it is possible to write code
that ports simply via recompilation.  Nissen & Wallis Ada Style Guide
(Cambridge University Press, earlier version published in Ada Letters
vol I, #3, Mar/Apr 1982) shows how to achieve portable code.  

But, you'll never fit SDI onto an IBM PC, no matter how well it's
written.  Most of the real portability problems are design problems,
not coding problems.  See Karl Nyberg and my paper in Ada-Europe 1989
(also Cambridge University Press), "Observations on Portable Ada
Systems".

				dave emery
				emery@aries.mitre.org