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From: David Brown <david.brown@hesbynett.no>
Newsgroups: comp.lang.c
Subject: Re: Baby X is bor nagain
Date: Mon, 1 Jul 2024 00:20:38 +0200
Organization: A noiseless patient Spider
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On 30/06/2024 18:10, Michael S wrote:
> On Sun, 30 Jun 2024 17:54:14 +0200
> David Brown <david.brown@hesbynett.no> wrote:

>> But why would you expect a warning from code that is perfectly legal
>> and well-defined C code, without explicitly enabling warnings that
>> check for particular style issues?  Non-prototype function
>> declarations are deprecated (since C99), but not removed from the
>> language until C23 (where that declaration is now a function
>> prototype).
> 
> I expect warning at -Wall, because it is deprecated. Those who do
> not want warning can turn it off explicitly with -Wno-strict-prototypes
> or whatever the name of the switch.
> 

Deprecated does not mean you can't, or even should not, use the feature. 
  It is just a warning that it might be removed some time in the future. 
  I personally agree that it would be have been better if there had been 
a warning here, but compatibility with existing code meant that gcc 
choose to be conservative.  I've had "-Wstrict-prototypes" in my 
makefiles for decades.  So I am glad to see C23 removing non-prototype 
declarations entirely, only 20 years or so late.  But the default flags 
and settings are not picked for what you or I would like.