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From: David Brown <david.brown@hesbynett.no>
Newsgroups: comp.lang.c
Subject: Re: "A diagram of C23 basic types"
Date: Thu, 3 Apr 2025 20:51:48 +0200
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On 03/04/2025 20:31, Keith Thompson wrote:
> bart <bc@freeuk.com> writes:
> [...]
>> I understand C23 mode will be enabled by a compiler option (-std=c23);
>> the same method could have been used to enable all std headers, and
>> for that to be the default.
> 
> The standard says exactly nothing about compiler options.  "-std=c23"
> is a convention used by *some* compilers (gcc and other compilers
> designed to be compatible with it).
> 
>> Hello World then becomes this one-liner:
>>
>>    int main() {puts("Hello, World!");}
> 
> A compiler could provide such an option as a non-conforming extension
> with no change in the standard.  I'm not aware that any compiler
> has done so, or that there's been any demand for it.  One reason
> for the lack of demand might be that any code that depends on it
> is not portable.  (Older versions of MS Visual Studio create a
> "stdafx.h" header, but newer versions appear to have dropped that.)
> 

gcc provides such an option :

	gcc -include stdio.h hello_world.c

If someone really wanted to, they could easily make a shell script, bash 
alias, Windows bat file, or whatever, as a wrapper for gcc with a whole 
bunch of "-include" options for all the standard headers.