Re: [PHP-DEV] `COM_RESET_CONNECTION` support in `mysqlnd`

On Tue, Jun 2, 2026 at 9:26 AM Tim Düsterhus <[email protected]> wrote:
>
> Hi
>
> Apologies for the late reply. It's been a busy May for me with
> conferences and other important day job duties.
>
> Am 2026-05-08 14:54, schrieb Eric Norris:
> >> IMO it should be a vote for the increased minimum version with a good
> >> argument as to why this increased minimum version is useful,
> >> specifically “more predictable behavior for persistent connections,
> >> because any per-connection state can cleanly be reset” and “support
> >> for
> >> C11 in autotools, which already is the documented minimum in
> >> https://github.com/php/php-src/blob/8d0777e88b8494807727fc57c148c2497976eff5/CODING_STANDARDS.md?plain=1#L12,
> >> but folks will only notice if compilation fails halfway through”.
> >
> > That makes sense to me. That said, I don't personally have anything
> > more to say about the autoconf change, other than "it sounds like a
> > good idea." I will need you or someone (Peter Kokot?) who is more
> > knowledgeable about autoconf and the build system to write that
> > section if we're going to make this a combined RFC.
>
> Something like this should hopefully work:
>
> > The officially documented minimum version of the C standard that is
> > supported by PHP is [C11 as of PHP
> > 8.4](https://github.com/php/php-src/commit/631bab42ddef8e90964558fe8b1df80157e12986).
> > This requirement is however not explicitly checked in a programmatic
> > fashion, which means that users trying to build PHP with an older
> > compiler that does not support the C11 standard might encounter
> > non-obvious build failures. The currently used minimum version of
> > autoconf, which is the tool used to generate the ./configure script
> > which is used for feature detection, is 2.68 and does not yet know
> > about C11, preventing it from reliably detecting the minimum
> > requirement and associated features.
> >
> > We propose increasing the minimum version of autoconf 2.71 from 2.69.
> > The updated version has official support for C11 and also allows to
> > simplify some of the existing autoconf definitions, simplifying
> > maintenance for the PHP Core team.
> >
> > autoconf is only required when building from git. The official PHP
> > release tarballs contain a pre-generated ./configure script that is
> > generated by the release managers, thus this change does not affect
> > users that build from the official releases. For users that build from
> > git, autoconf 2.71 was released in January 2021 and is available by
> > default in the current stable versions for all common Linux
> > distributions. This includes Debian 12+ (Bookworm), Ubuntu 22.04+
> > (jammy), RHEL 10, Fedora 38+, Alpine Linux 3.16+, OpenSuse Leap 16.
>
> Best regards
> Tim Düsterhus

Thank you, I've added that verbatim to the RFC draft and published it
for discussion.