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From: Tim Rentsch <tr.17687@z991.linuxsc.com>
Newsgroups: comp.lang.c
Subject: Re: function declaration without args no longer works
Date: Tue, 05 May 2026 00:15:43 -0700
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John Forkosh <forkosh@panix.com> writes:

> John Forkosh <forkosh@panix.com> wrote:
>
>> Michael B?uerle <michael.baeuerle@gmx.net> wrote:
>>
>>> John Forkosh wrote:
>>>
>>> Have you tried "-std=c99" (or whatever standard
>>> your code was written for)?
>>
>> Thanks, Michael.  I've tried it now:) Indeed, as soon
>> as I saw your "-std=" I vaguely recalled that switch.
>> And, yeah, both -std=c99 and (as also suggested)
>> -std=gnu17 ignore the problem, and compile just fine
>> Thanks again.
>
> Update:  While subsequently trying to compile some even older
> code, written circa 1991, I had to go back even further,
> to -std=c89 (or equivalently -ansi as per the man cc page).
> And then, no errors, no warnings, not even with -pedantic.

What were the sorts of things that caused diagnostics when
compiled under -std=c99?