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From: Eli Zaretskii <eliz@gnu.org>
To: Jonathan Wakely <jwakely.gcc@gmail.com>
Cc: david@westcontrol.com, gcc@gcc.gnu.org
Subject: Re: More C type errors by default for GCC 14
Date: Wed, 10 May 2023 15:22:08 +0300	[thread overview]
Message-ID: <83r0ro8jgv.fsf@gnu.org> (raw)
In-Reply-To: <CAH6eHdQ0GEYf76aNzhcybTXTvJnSxeU0Wv8UVqrWQeLB+gyJ_A@mail.gmail.com> (message from Jonathan Wakely on Wed, 10 May 2023 12:49:52 +0100)

> From: Jonathan Wakely <jwakely.gcc@gmail.com>
> Date: Wed, 10 May 2023 12:49:52 +0100
> Cc: David Brown <david@westcontrol.com>, gcc@gcc.gnu.org
> 
> > If some developers want to ignore warnings, it is not the business of
> > GCC to improve them, even if you are right in assuming that they will
> > not work around errors like they work around warnings (and I'm not at
> > all sure you are right in that assumption).  But by _forcing_ these
> > errors on _everyone_, GCC will in effect punish those developers who
> > have good reasons for not changing the code.
> 
> There will be options you can use to continue compiling the code
> without changing it. You haven't given a good reason why it's OK for
> one group of developers to have to use options to get their desired
> behaviour from GCC, but completely unacceptable for a different group
> to have to use options to get their desired behaviour.
> 
> This is just a change in defaults.

A change in defaults that is not backward-compatible should only be
done for very good reasons, because it breaks something that was
working for years.  No such good reasons were provided.  And no,
educating/forcing GCC users to use more modern dialect of C is not a
good reason.

> Accepting broken code by default is not a priori a good thing, as
> you seem to insist. Rejecting it by default is not a priori a good
> thing. There is a pragmatic choice to be made, and your argument is
> still no more than "it compiles today, so it should compile
> tomorrow".

Once again: it isn't "broken code".  It is dangerous code, and in some
cases unintentionally suspicious code.  But it isn't broken, because
GCC can compile it into a valid program, which, if the programmer
indeed meant that, will work and do its job.

> > > Agreed.  But if we can make it harder for them to release bad code,
> > > that's good overall.
> >
> > I'm okay with making it harder, but without making it too hard for
> > those whose reasons for not changing the code are perfectly valid.
> > This proposal crosses that line, IMNSHO.
> 
> Where "too hard" means using a compiler option. Seriously? This seems farcical.

This goes both ways, of course.  GCC had -Werror since about forever.

  reply	other threads:[~2023-05-10 12:21 UTC|newest]

Thread overview: 246+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-09 12:15 Florian Weimer
2023-05-09 14:16 ` Dave Blanchard
2023-05-09 15:03 ` David Edelsohn
2023-05-09 15:07   ` Sam James
2023-05-09 15:35     ` Dave Blanchard
2023-05-09 15:58       ` Jonathan Wakely
2023-05-09 16:26       ` Arsen Arsenović
2023-05-09 15:14   ` Jonathan Wakely
2023-05-09 15:22     ` Dave Blanchard
2023-05-09 16:38       ` Arsen Arsenović
2023-05-09 16:57         ` Eli Zaretskii
2023-05-09 17:05           ` Sam James
2023-05-09 18:55             ` Eli Zaretskii
2023-05-09 17:15           ` Jonathan Wakely
2023-05-09 19:04             ` Eli Zaretskii
2023-05-09 19:07               ` Jakub Jelinek
2023-05-09 19:22                 ` Eli Zaretskii
2023-05-09 20:13                   ` David Edelsohn
2023-05-09 20:21                     ` Arsen Arsenović
2023-05-10  2:38                       ` Eli Zaretskii
2023-05-10  8:36                         ` Arsen Arsenović
2023-05-10 11:52                           ` Eli Zaretskii
2023-05-10 11:56                             ` Jonathan Wakely
2023-05-10 12:25                               ` Eli Zaretskii
2023-05-10 12:30                                 ` Jonathan Wakely
2023-05-10 12:44                                   ` Eli Zaretskii
2023-05-15 12:28                         ` Richard Earnshaw (lists)
2023-05-15 20:17                           ` Eric Gallager
2023-05-16  7:05                             ` Florian Weimer
2023-05-16 15:56                               ` Jason Merrill
2023-05-09 20:40                     ` Jonathan Wakely
2023-05-09 22:27                       ` David Edelsohn
2023-05-09 22:37                         ` Joel Sherrill
2023-05-09 22:45                           ` Jonathan Wakely
2023-05-10 10:40                             ` Eric Gallager
2023-05-10 10:45                               ` Sam James
2023-05-10 10:56                                 ` Neal Gompa
2023-05-10 12:06                                   ` Eli Zaretskii
2023-05-10 12:10                                     ` Neal Gompa
2023-05-10 12:41                                       ` Eli Zaretskii
2023-05-10 10:48                               ` Jonathan Wakely
2023-05-10 10:51                                 ` Jonathan Wakely
2023-05-10 12:00                               ` Eli Zaretskii
2023-05-10 12:42                                 ` Sam James
2023-05-10 15:10                             ` Joel Sherrill
2023-05-10 15:14                               ` Jakub Jelinek
2023-05-10 16:36                                 ` Joel Sherrill
2023-05-10 16:44                                   ` Jakub Jelinek
2023-05-10 17:05                                   ` Jonathan Wakely
2023-05-10 18:37                             ` James K. Lowden
2023-05-10 23:26                               ` Jonathan Wakely
2023-05-11 18:47                                 ` Jason Merrill
2023-05-10 23:33                               ` Sam James
2023-05-11  5:48                               ` Eli Zaretskii
2023-05-11  2:28                             ` Po Lu
2023-05-11  2:09                       ` Po Lu
2023-05-11  2:14                         ` Sam James
2023-05-11  2:23                           ` Po Lu
2023-05-11  3:14                             ` Eli Schwartz
2023-05-11  3:56                               ` Po Lu
2023-05-11  4:46                                 ` Eli Schwartz
2023-05-11  4:49                                   ` Eli Schwartz
2023-05-11  6:23                                     ` Po Lu
2023-05-11  6:18                                   ` Po Lu
2023-05-11 22:41                                     ` Eli Schwartz
2023-05-12  2:08                                       ` Po Lu
2023-05-12  3:07                                         ` Eli Schwartz
2023-05-12  5:57                                           ` Po Lu
2023-05-12 11:05                                             ` Gabriel Ravier
2023-05-12 13:53                                               ` Po Lu
2023-05-12 14:03                                                 ` Jonathan Wakely
2023-05-14 12:35                                                 ` Mark Wielaard
2023-05-12 11:48                                             ` Is the GNUC dialect anything that GCC does when given source code containing UB? (Was: More C type errors by default for GCC 14) Eli Schwartz
2023-05-12 13:07                                               ` Is the GNUC dialect anything that GCC does when given source code containing UB? Po Lu
2023-05-12  6:56                                           ` More C type errors by default for GCC 14 Eli Zaretskii
2023-05-12  7:28                                             ` Jonathan Wakely
2023-05-12 10:36                                               ` Eli Zaretskii
2023-05-12 13:19                                               ` Po Lu
2023-05-12 13:25                                                 ` Gabriel Ravier
2023-05-13  0:45                                                   ` Po Lu
2023-05-13  5:30                                                     ` Thomas Koenig
2023-05-13  5:53                                                       ` Po Lu
2023-05-14  5:10                                                         ` Eli Schwartz
2023-05-14  5:38                                                           ` Po Lu
2023-05-14  9:46                                                             ` David Brown
2023-05-14 10:21                                                               ` Jonathan Wakely
2023-05-14 10:23                                                                 ` Jonathan Wakely
2023-05-14  5:08                                                     ` Eli Schwartz
2023-05-14  5:28                                                       ` Po Lu
2023-05-14  5:56                                                         ` Eli Schwartz
2023-05-14 11:55                                                           ` Po Lu
2023-05-14 12:22                                                             ` Arsen Arsenović
2023-05-15  1:05                                                               ` Po Lu
2023-05-14  6:03                                                         ` Eli Schwartz
2023-05-14  8:47                                                         ` Jonathan Wakely
2023-05-14 12:05                                                           ` Po Lu
2023-05-14 12:48                                                             ` Nicholas Vinson
2023-05-14 10:29                                                         ` David Brown
2023-05-12 15:51                                                 ` Jason Merrill
2023-05-17 10:06                                                   ` Florian Weimer
2023-05-12 11:26                                         ` David Brown
2023-05-11  6:24                                   ` Eli Zaretskii
2023-05-11 22:43                                     ` Eli Schwartz
2023-05-12  2:38                                       ` Po Lu
2023-05-12  2:55                                         ` Jason Merrill
2023-05-12  6:01                                           ` Po Lu
2023-05-12  6:40                                             ` Jonathan Wakely
2023-05-12 13:23                                               ` Po Lu
2023-05-12 10:49                                             ` Pedro Alves
2023-05-12 13:26                                               ` Po Lu
2023-05-12 11:55                                             ` Eli Schwartz
2023-05-12 13:54                                               ` Po Lu
2023-05-12  6:49                                           ` Eli Zaretskii
2023-05-12  2:56                                         ` Sam James
2023-05-12  6:03                                           ` Po Lu
2023-05-12  3:06                                         ` Sam James
2023-05-12  6:25                                       ` Eli Zaretskii
2023-05-12 11:23                                         ` Gabriel Ravier
2023-05-11  6:12                               ` Eli Zaretskii
2023-05-11  7:04                                 ` Jonathan Wakely
2023-05-11 22:30                                 ` Eli Schwartz
2023-05-11 22:35                                   ` Sam James
2023-05-12  2:40                                     ` Po Lu
2023-05-12  2:52                                       ` Sam James
2023-05-12  5:32                                         ` Po Lu
2023-05-12  2:39                                   ` Po Lu
2023-05-12  3:18                                     ` Eli Schwartz
2023-05-12  6:17                                   ` Eli Zaretskii
2023-05-11  7:59                         ` David Brown
2023-05-09 21:00                     ` Thomas Koenig
2023-05-09 21:17                       ` Arsen Arsenović
2023-05-10 13:57                       ` Florian Weimer
2023-05-10 11:00                     ` David Brown
2023-05-11 10:49                       ` James K. Lowden
2023-05-11  1:38                     ` Po Lu
2023-05-11  1:43                       ` Sam James
2023-05-11  2:20                         ` Po Lu
2023-05-09 20:57                   ` Florian Weimer
2023-05-10  2:33                     ` Eli Zaretskii
2023-05-10  8:04                       ` Jonathan Wakely
2023-05-10  8:46                         ` Richard Biener
2023-05-10 12:26                           ` Florian Weimer
2023-05-10 11:30                         ` Eli Zaretskii
2023-05-10 12:03                           ` Jakub Jelinek
2023-05-10 12:36                             ` Eli Zaretskii
2023-05-10 12:41                               ` Gabriel Ravier
2023-05-10 14:14                                 ` Eli Zaretskii
2023-05-10 14:22                                   ` Jakub Jelinek
2023-05-10 15:30                                     ` Eli Zaretskii
2023-05-10 16:02                                       ` Jakub Jelinek
2023-05-10 16:31                                         ` Eli Zaretskii
2023-05-10 16:33                                           ` Richard Biener
2023-05-10 16:57                                             ` Eli Zaretskii
2023-05-10 17:08                                           ` Joseph Myers
2023-05-10 18:18                                             ` Eli Zaretskii
2023-05-12 15:02                                             ` Florian Weimer
2023-05-12 17:52                                               ` Florian Weimer
2023-05-12 17:55                                                 ` Gabriel Ravier
2023-05-12 18:00                                                   ` Florian Weimer
2023-05-12 18:08                                                   ` Alexander Monakov
2023-05-12 18:14                                                     ` Florian Weimer
2023-05-15 12:51                                                       ` Michael Matz
2023-05-16  8:55                                                         ` Florian Weimer
2023-05-16 10:39                                                           ` Alexander Monakov
2023-05-16 11:01                                                             ` Jakub Jelinek
2023-05-16 11:09                                                               ` Jonathan Wakely
2023-05-16 11:15                                                               ` Florian Weimer
2023-05-12 19:44                                               ` Joseph Myers
2023-05-12 20:43                                                 ` Florian Weimer
2023-05-12 20:18                                               ` Jason Merrill
2023-05-12 20:57                                                 ` Florian Weimer
2023-05-12 21:20                                                   ` Sam James
2023-05-12 21:21                                               ` Sam James
2023-05-12 21:37                                                 ` Florian Weimer
2023-05-12 21:47                                                   ` Sam James
2023-05-12 21:59                                                     ` Florian Weimer
2023-05-10 15:58                                   ` David Brown
2023-05-10 16:28                                     ` Eli Zaretskii
2023-05-11  6:52                                       ` David Brown
2023-05-11  7:39                                         ` Eli Zaretskii
2023-05-10 14:31                             ` Thomas Koenig
2023-05-10 15:37                               ` Eli Zaretskii
2023-05-11  2:38                         ` Po Lu
2023-05-11  7:38                           ` Arsen Arsenović
2023-05-11  8:31                             ` Po Lu
2023-05-11  8:44                               ` Arsen Arsenović
2023-05-11  9:28                                 ` Po Lu
2023-05-11 21:10                                   ` Arsen Arsenović
2023-05-12  1:41                                     ` Po Lu
2023-05-11 10:35                                 ` Eli Zaretskii
2023-05-11 19:25                                   ` Arsen Arsenović
2023-05-12  2:36                                     ` Po Lu
2023-05-12 12:30                                       ` Gabriel Ravier
2023-05-12 13:56                                         ` Po Lu
2023-05-12  7:53                                     ` Eli Zaretskii
2023-05-12  8:15                                       ` Jakub Jelinek
2023-05-12 10:40                                         ` Eli Zaretskii
2023-05-12  8:45                                       ` Christian Groessler
2023-05-12 10:14                                         ` Jonathan Wakely
2023-05-12  9:11                                       ` Thomas Koenig
2023-05-11  8:53                               ` Jonathan Wakely
2023-05-11  9:29                                 ` Po Lu
2023-05-10  8:49               ` David Brown
2023-05-10 11:37                 ` Eli Zaretskii
2023-05-10 11:49                   ` Jonathan Wakely
2023-05-10 12:22                     ` Eli Zaretskii [this message]
2023-05-10 13:30                       ` David Brown
2023-05-10 14:39                         ` Eli Zaretskii
2023-05-10 15:21                           ` Paul Koning
2023-05-10 16:20                           ` David Brown
2023-05-10 16:48                             ` Eli Zaretskii
2023-05-10 12:32                   ` Sam James
2023-05-10 12:47                     ` Eli Zaretskii
2023-05-09 19:33           ` Arsen Arsenović
2023-05-09 15:25     ` David Edelsohn
2023-05-11  1:25     ` Po Lu
2023-05-11  1:30       ` Sam James
2023-05-11  1:33       ` Sam James
2023-05-11  2:18         ` Po Lu
2023-05-11  6:44           ` Jonathan Wakely
2023-05-11  8:32             ` Po Lu
2023-05-11  8:52               ` Jonathan Wakely
2023-05-11  7:36       ` Arsen Arsenović
2023-05-11  8:23         ` Po Lu
2023-05-09 18:22   ` Florian Weimer
2023-05-11 21:32     ` Segher Boessenkool
2023-05-09 15:16 ` Richard Biener
2023-05-09 16:05   ` Jakub Jelinek
2023-05-09 16:11     ` Sam James
2023-05-09 16:13     ` David Edelsohn
     [not found]       ` <BBE9950C-28AA-4A1C-A4C5-7F486538004E@gmail.com>
2023-05-09 16:44         ` Florian Weimer
2023-05-09 16:58           ` Ian Lance Taylor
2023-05-09 17:08           ` Jason Merrill
2023-05-09 17:16             ` Sam James
2023-05-09 16:59   ` Florian Weimer
2023-05-09 17:07     ` Sam James
2023-05-09 17:35       ` Florian Weimer
2023-05-11 15:21 ` Peter0x44
2023-05-12  9:33 ` Martin Jambor
2023-05-12 12:30   ` Jakub Jelinek
2023-05-15 12:46     ` Michael Matz
2023-05-15 13:14     ` Richard Earnshaw (lists)
2023-05-10 12:41 Marcin Jaczewski
2023-05-10 14:19 ` Eli Zaretskii
2023-05-10 13:10 Basile Starynkevitch
2023-05-10 14:20 ` David Brown

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