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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Will Ada-95 Programs Written in MS Windows Run in MacOS and Linux
 Without Some Tweaking.
Date: Sat, 07 Dec 2013 13:16:05 +0000
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Date: 2013-12-07T13:16:05+00:00
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Austin Obyrne <austin.obyrne@hotmail.com> writes:

> My Ada-95 text book came first day - 10 years ago - with a selection
> of compilers for Windows, MacOS and Linux.  Having a Windows operating
> system I automatically installed the Windows compiler from the three
> and all has gone very well up to now.  That compiler was the gnat
> 311.p version. My ciphers written in Ada-95 for Microsoft Windows are
> complete and working very well now after years of work.  I now want to
> get them to run in Macos and/or Linux also.
>
> It would be naïve to think that they will run in Macos also just by
> installing that compiler and ditto for Linux – it would be great if
> they did?.
>
> Before I spend any more money (in short supply) on getting Macos and
> Linux equipment could anybody who has experience of doing this tell me
> if the programs written for Windows will run in Macos and/or Linux
> straight off and if the Windows program source code requires any
> modification or even if it runs at all.

I just downloaded your Vector Cipher_2 zip file (and deleted all the .o,
.ali, .exe and b_*.c files!) and, using GNAT GPL 2013 on Mac OS X,
compiled & built real_time_encryption_program_mark_2 with three
warnings:

real_time_encryption_program_mark_2.adb:589:12: warning: unary minus
 expression should be parenthesized here
real_time_encryption_program_mark_2.adb:612:08: warning: unary minus
 expression should be parenthesized here
real_time_encryption_program_mark_2.adb:743:22: warning: "PlainTextNum"
 may be referenced before it has a value

(there were a lot more with -gnatwa, enable all common warnings)

so I think you should be in good shape. Mind you, I didn't run it since
I didn't see any obvious instructions on how to run what look like test
cases.

Before spending any money, why not download the latest GNAT for Windows
from libre.adacore.com and try that? Ada code tends to be very portable.

I'd strongly recommend not bothering with the Linux or Mac compilers
from your textbook; 3.11p is very old, and the Mac version at least
won't even run on recent Macs.