Re: Baby X is bor nagain

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.