From: Aaron Ballman <aaron@aaronballman.com>
To: Jonathan Wakely <jwakely.gcc@gmail.com>
Cc: Nick Bowler <nbowler@draconx.ca>,
gcc@gcc.gnu.org, c-std-porting@lists.linux.dev,
Zack Weinberg <zack@owlfolio.org>,
autoconf@gnu.org, cfe-commits@lists.llvm.org
Subject: Re: How can Autoconf help with the transition to stricter compilation defaults?
Date: Thu, 10 Nov 2022 13:44:46 -0500 [thread overview]
Message-ID: <CAAt6xTurKqjYnckWHxjaN0bkXSY3fbiHV7tFEK+SnsaZo-ry9A@mail.gmail.com> (raw)
In-Reply-To: <CAH6eHdQupWU6BEx6rLVTBS6HRW05JK0y2w7h_kUkaBQXKD1OCA@mail.gmail.com>
On Thu, Nov 10, 2022 at 1:12 PM Jonathan Wakely via cfe-commits
<cfe-commits@lists.llvm.org> wrote:
>
> On Thu, 10 Nov 2022 at 17:58, Jonathan Wakely wrote:
> >
> > On Thu, 10 Nov 2022 at 17:52, Nick Bowler wrote:
> > > It saddens me to see so much breakage happening in "modern C", a
> > > language that has (until now) a long history of new language features
> > > being carefully introduced to avoid these sort of problems.
> >
> > The features were introduced in 1999.
>
> Well, some of them were. Some more are coming now in C2x but the
> problem has existed since C99 it's just that compilers "protected"
> most users from having to fix their code at the time. But it's been
> more than two decades and it's time to accept that missing prototypes,
> implicit conversions between pointers and ints etc are a hazard and
> should be diagnosed not ignored for the benefit of people who never
> want to fix their questionable code.
Functions without prototypes were deprecated in ANSI C and came into
ISO C as deprecated. They were obsoleted with the release of the 2nd
edition of K&R C (circa 1978) when prototypes were introduced, IIRC.
They've literally never been a recommended practice in standard C.
Implicit function declarations and implicit int were outright removed
from C99 without a deprecation period due to the security concerns
they caused.
~Aaron
next prev parent reply other threads:[~2022-11-10 18:45 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-10 17:16 Zack Weinberg
2022-11-10 17:52 ` Nick Bowler
2022-11-10 17:58 ` Jonathan Wakely
2022-11-10 18:12 ` Jonathan Wakely
2022-11-10 18:44 ` Aaron Ballman [this message]
2022-11-12 2:56 ` Zack Weinberg
2022-11-10 18:05 ` Rich Felker
2022-11-10 21:44 ` Florian Weimer
2022-11-12 3:22 ` Zack Weinberg
2022-11-10 18:08 ` Florian Weimer
2022-11-12 3:40 ` Zack Weinberg
2022-11-12 3:43 ` Sam James
2022-11-12 14:27 ` Zack Weinberg
2022-11-12 3:45 ` Joseph Myers
2022-11-12 15:59 ` Wookey
2022-11-12 16:12 ` Zack Weinberg
2022-11-10 18:19 ` Aaron Ballman
2022-11-10 21:05 ` Paul Eggert
2022-11-11 15:11 ` Aaron Ballman
2022-11-13 0:43 ` Paul Eggert
2022-11-14 12:41 ` Aaron Ballman
2022-11-14 18:14 ` Paul Eggert
2022-11-14 18:30 ` Florian Weimer
2022-11-14 18:35 ` Aaron Ballman
2022-11-15 14:50 ` Jonathan Wakely
2022-11-15 19:08 ` Paul Eggert
2022-11-15 19:27 ` Jonathan Wakely
2022-11-15 20:27 ` Paul Eggert
2022-11-15 20:57 ` Aaron Ballman
2022-11-15 23:09 ` Paul Eggert
2022-11-15 23:43 ` Ben Boeckel
2022-11-16 14:26 ` Michael Matz
2022-11-16 14:40 ` Alexander Monakov
2022-11-16 15:01 ` Michael Matz
2022-11-16 15:27 ` Richard Biener
2022-11-16 15:35 ` Sam James
2022-11-16 15:59 ` Michael Matz
2022-11-16 16:20 ` Jonathan Wakely
2022-11-16 16:34 ` Michael Matz
2022-11-16 16:46 ` Jonathan Wakely
2022-11-16 18:17 ` Paul Eggert
2022-11-16 18:40 ` Jeffrey Walton
2022-11-17 18:45 ` Paul Eggert
2022-11-16 18:59 ` Zack Weinberg
2022-11-17 18:58 ` Paul Eggert
2022-11-17 21:35 ` Bruno Haible
2022-11-17 22:27 ` Paul Eggert
2022-11-17 13:30 ` Michael Matz
2022-11-15 20:36 ` Aaron Ballman
2022-11-15 5:03 ` Sam James
2022-11-15 13:30 ` Zack Weinberg
2022-11-15 13:34 ` Sam James
2022-11-16 0:08 ` Bob Friesenhahn
2022-11-13 0:43 ` Paul Eggert
2022-11-17 13:57 ` Jason Merrill
2022-11-10 20:19 ` Paul Eggert
[not found] ` <d785b19371e8419f5a5817d7cdb429db91614a3a.camel@orlitzky.com>
2022-11-11 3:08 ` Sam James
2022-11-11 3:33 ` Zack Weinberg
2022-11-11 8:40 ` Sam James
2022-11-11 9:02 ` Paul Eggert
2022-11-12 14:09 ` Zack Weinberg
2022-11-11 23:25 ` Sam James
2022-11-12 0:53 ` Paul Eggert
2022-11-12 4:00 ` Sam James
2022-11-11 9:15 ` Sam James
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