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Re: netbsd-11 gcc bug

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At Sun, 24 May 2026 11:38:59 -0400, Jason Thorpe <thorpej@me.com> wrote:
Subject: Re: netbsd-11 gcc bug
> 
> > On May 24, 2026, at 8:33 AM, Mouse <mouse@rodents-montreal.org>
> > wrote:
> >  Perhaps the gcc people are able-and-willing to do that.  But,
> > if not, I still maintain that it is thereby unsuitable for the
> > use case of building NetBSD.
> 
> I mean, I also find  compiler people  annoying in this regard, but
> this doesn t render the compiler  unsuitable .  Just fix the code
> and be done with it.  I do wish the compiler at least emitted a
> warning, however, when a NULL-check is elided for this reason.

Indeed, especially for the warnings!  (Does UBSAN help?)

The ultimate fix may be to convince the C standards committee to
eliminate all cases of "undefined behaviour" from the standard.

Converting most cases to "implementation defined behaviour" should be
one option.  Some others may require whacking some sense into some
vendors of esoteric systems.

There are apparently some attempts afoot to do this (according to Robert
C. Seacord, the current convenor of the committee if I understand
correctly).


-- 
					Greg A. Woods <gwoods@acm.org>

Kelowna, BC     +1 250 762-7675           RoboHack <woods@robohack.ca>
Planix, Inc. <woods@planix.com>     Avoncote Farms <woods@avoncote.ca>

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netbsd-11 gcc bug Manuel Bouyer <bouyer@antioche.eu.org> - 2026-05-23 10:59 +0200
  Re: netbsd-11 gcc bug Manuel Bouyer <bouyer@antioche.eu.org> - 2026-05-23 12:55 +0200
    Re: netbsd-11 gcc bug Manuel Bouyer <bouyer@antioche.eu.org> - 2026-05-23 20:45 +0200
  Re: netbsd-11 gcc bug Valery Ushakov <uwe@stderr.spb.ru> - 2026-05-23 14:22 +0300
    Re: netbsd-11 gcc bug Manuel Bouyer <bouyer@antioche.eu.org> - 2026-05-23 13:28 +0200
  Re: netbsd-11 gcc bug Roland Illig <roland.illig@gmx.de> - 2026-05-23 20:38 +0200
    Re: netbsd-11 gcc bug Manuel Bouyer <bouyer@antioche.eu.org> - 2026-05-23 20:47 +0200
      Re: netbsd-11 gcc bug Robert Elz <kre@munnari.OZ.AU> - 2026-05-24 02:29 +0700
        Re: netbsd-11 gcc bug Mouse <mouse@Rodents-Montreal.ORG> - 2026-05-23 19:11 -0400
          Re: netbsd-11 gcc bug Martin Husemann <martin@duskware.de> - 2026-05-24 10:44 +0200
            Re: netbsd-11 gcc bug Mouse <mouse@Rodents-Montreal.ORG> - 2026-05-24 08:33 -0400
              Re: netbsd-11 gcc bug Jason Thorpe <thorpej@me.com> - 2026-05-24 11:38 -0400
                Re: netbsd-11 gcc bug "Greg A. Woods" <woods@planix.ca> - 2026-05-24 16:53 -0700
              Re: netbsd-11 gcc bug David Holland <dholland-tech@netbsd.org> - 2026-05-25 00:02 +0000
                Re: netbsd-11 gcc bug Mouse <mouse@Rodents-Montreal.ORG> - 2026-05-25 08:23 -0400
                C compiler (over-)optimization (was: netbsd-11 gcc bug) Edgar Fuß <ef@math.uni-bonn.de> - 2026-05-29 19:12 +0200
                Re: C compiler (over-)optimization (was: netbsd-11 gcc bug) Mouse <mouse@Rodents-Montreal.ORG> - 2026-05-29 14:21 -0400
                Re: C compiler (over-)optimization (was: netbsd-11 gcc bug) "Greg A. Woods" <woods@planix.ca> - 2026-05-29 14:27 -0700
                Re: C compiler (over-)optimization Anders Magnusson <ragge@tethuvudet.se> - 2026-05-30 12:30 +0200
                Re: C compiler (over-)optimization (was: netbsd-11 gcc bug) Andrew Cagney <andrew.cagney@gmail.com> - 2026-05-31 13:02 -0400
                Re: C compiler (over-)optimization (was: netbsd-11 gcc bug) Jason Thorpe <thorpej@me.com> - 2026-05-31 14:29 -0500
                Re: netbsd-11 gcc bug "Greg A. Woods" <woods@planix.ca> - 2026-05-28 14:40 -0700
                Re: netbsd-11 gcc bug Mouse <mouse@Rodents-Montreal.ORG> - 2026-05-28 18:36 -0400
                Re: netbsd-11 gcc bug Jason Thorpe <thorpej@me.com> - 2026-05-28 19:04 -0400
                Re: netbsd-11 gcc bug "Greg A. Woods" <woods@planix.ca> - 2026-05-29 14:31 -0700
      Re: netbsd-11 gcc bug Jörg Sonnenberger <joerg@bec.de> - 2026-05-26 13:52 +0200
        Re: netbsd-11 gcc bug Jason Thorpe <thorpej@me.com> - 2026-05-26 10:02 -0400

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