Re: Every sufficiently competent C programmer knows

On 2025-03-16 11:17:53 +0000, Richard Heathfield said:

On 16/03/2025 10:31, Mikko wrote:

False. You didn't say that HHH is a C function. In particular, the code
shown above does not say so.

 It scarcely qualifies as C.

A text is a conforming C program if a conforming compiler accepts and
compiles it. As a conforming compiler can have all sorts of extesions
any text can be a conforming program.

For example, it begins by a goto this code:
 __asm__("lea eax, DATA1");
   __asm__("mov Aborted, eax");
   __asm__("lea eax, DATA2");
   __asm__("mov execution_trace, eax");
   __asm__("mov eax, END_OF_CODE");
   __asm__("mov End_Of_Code, eax");
 which any C compiler is free to reject.
 C99 introduced the asm keyword, but that's spelled asm, not __asm__, and of course it's not a magic wand, so it can't make an inherently unportable program work on every platform supported by C compilers. C/370, for example, would have a fit.

Words that start with an underscore, except ones defined in the
standard, are reserved for implementation specifc extensions.
--
Mikko