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Re: What is the oldest computer that could be used today for real work? [message #411095 is a reply to message #411083] Sat, 18 September 2021 17:46 Go to previous messageGo to previous message
Dan Espen is currently offline  Dan Espen
Messages: 3867
Registered: January 2012
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Peter Flass <peter_flass@yahoo.com> writes:

> Ahem A Rivet's Shot <steveo@eircom.net> wrote:
>> On Sat, 18 Sep 2021 00:49:00 -0600
>> Grant Taylor <gtaylor@tnetconsulting.net> wrote:
>>
>>> On 9/18/21 12:27 AM, Ahem A Rivet's Shot wrote:
>>>> I suppose the real question is why not recompile them to take
>>>> advantage of the newer hardware. I know during Y2K work that a lot of
>>>> instances of lost source code came to light, are people still running
>>>> binaries for which there is no source ?
>>>
>>> Why recompile something just for the sake of recompiling it?
>>>
>>> If it's working just fine and is exhibiting no symptoms, why mess with it?
>>
>> Yeah I get it, you might be depending on an old undocumented
>> compiler bug or you might fall foul of a new one so why risk the new shiny
>> compiler that might get 10% better performance and might break the
>> application.
>
> I ran into this trying to recompile some code that was written for PL/I(F)
> with the Enterprise compiler. Several constructs were rejected. This was in
> gray areas where the documentation didn’t definitively allow or not allow
> the code. After a while it became not worth it to me to make a lot of
> changes to fit the new compiler.

Similar here, large amounts of PL/I and a bit of it broke with
Enterprise PL/I. Strange how a new compiler can suddenly make
uninitialized variables start causing problems.

We had more than that though including some new compiler bugs.

--
Dan Espen
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