Re: [musl] Alignment attribute in headers

["Jₑₙₛ Gustedt" <jens.gustedt@inria.fr>]

Markus,

on Sun, 21 Apr 2024 09:38:38 +0200 you (Markus Wichmann
<nullplan@gmx.net>) wrote:

> Am Sun, Apr 21, 2024 at 09:16:05AM +0200 schrieb Jₑₙₛ Gustedt:
> > Since this is unified starting with C23 and I think we morally
> > should have C conformance first and fallbacks only if imperatively
> > needed I would go for
> >  
> 
> Ugh. Let the bike shedding begin. I will tell you that moral arguments
> about software don't make a lot of sense to me, though.

I am not a native speaker, but I think this is generally used as
figure of speech for "there got reasons to do something".

> >   #if __STDC_VERSION >= 202311L || __cplusplus >= 201100L
> >   /* use alignas */
> >   #elif __STDC_VERSION >= 201100L
> >   /* use _Alignas */
> >   #elif __GNUC__
> >   /* use attribute */
> >   #endif
> >  
> 
> Did you not read the part about the GCC version that claims C11
> conformance but doesn't have _Alignas? Yes, that's a bug. Yes, it was
> fixed. No, musl can't break compatibility with it.

ah, sorry

then how about

   #if __GNUC__           /* or ifdef if preferable for some reason */
   /* use gcc attribute */
   #elif __STDC_VERSION >= 202311L || __cplusplus >= 201100L
   /* use alignas */
   #elif __STDC_VERSION >= 201100L
   /* use _Alignas */
   #endif


Thanks
Jₑₙₛ

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