[PATCH v1 00/35] Require GNU C --at least GCC 5 or Clang 4-- in headers

[Alejandro Colomar]

Hi Florian,

On Mon, Nov 10, 2025 at 11:17:48AM +0100, Florian Weimer wrote:
> >> > Alejandro Colomar (35):
> >> >   Assume __GNUC__
> >> >   Assume __GNUC__ >= 2
> >> >   Assume __GNUC__ >= 3
> >> >   Assume __GNUC__ >= 4
> >> 
> >> No, this breaks some versions of Oracle Pro*C, tools based on CKit (such
> >> as mlnlffigen), and many other things.
> >
> > Thanks!  Is it because of 'Assume __GNUC__'?  Or because one of the
> > version bumps?  Could we assume a higher __GNUC__ but keep allowing
> > non-__GNUC__?
> 
> I don't know.  Changing <sys/cdefs.h> is probably not advised because
> it's shared with gnulib.  Support for GCC 1 can probably be removed from
> the other headers, but the cleanup opportunities seem rather minimal.

Apart from the cleanup opportunity, there's the benefit on new code.
The origin of this was the discussion about adding a new function that
returns a _Bool.  If we require a C99 compiler, new code could be much
better.


Cheers,
Alex

> 
> Thanks,
> Florian
> 

-- 
<https://www.alejandro-colomar.es>
Use port 80 (that is, <...:80/>).
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