Re: [PATCH 1/1] man/man2/request_key.2: Add missing GNU size forward-declarations

[Alejandro Colomar <alx@kernel.org>]

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Hi Petr,

> Date: 2026-09-14 14:24:42+0200
> From: Petr Vorel <pvorel@suse.cz>
>
[..]
> Please drop this patch.  I'm sorry, I overlook that although request_key() has
> const char *type like add_key(), unlike it it does not have size.

Thanks!

> Anyway N3207 (spec mentioned in d2c2db883) is something I'll need to get used to :).

There's a more recent paper with a slightly better spec (also compatible
with GCC): N3681.
<https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3681.pdf>

I've improved the GCC documentation, to discourage using several ';',
and added a diagnostic for it, which is in -Wextra:
'-Wmultiple-parameter-fwd-decl-lists'.
See the commit in gcc.git:
33c35b7f4c18 (2025-09-26; "c, objc: Add -Wmultiple-parameter-fwd-decl-lists")

The documentation for the GCC feature is at the bottom of this page:
<https://gcc.gnu.org/onlinedocs/gcc/Variable-Length.html>
It's easier to read than the standard specification, IMO.

> 
> Kind regards,
> Petr

Cheers,
Alex

-- 
<https://www.alejandro-colomar.es>

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