Re: gcc failure (optimised/non-optimised)

From	James Harris <james.harris.1@gmail.com>
Newsgroups	comp.lang.c
Subject	Re: gcc failure (optimised/non-optimised)
Date	2017-04-24 10:14 +0100
Organization	A noiseless patient Spider
Message-ID	<odkffc$jat$1@dont-email.me> (permalink)
References	<odf2pf$dd0$1@dont-email.me> <58fb2265.5246218@news.xs4all.nl> <odf99b$406$1@dont-email.me> <58fbcf02.49434953@news.xs4all.nl>

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On 22/04/2017 22:48, Richard Bos wrote:
> James Harris <james.harris.1@gmail.com> wrote:
>
>> IMO gcc is still at fault (and I use the term for a preference, not a
>> technical failure) for not reporting, by default, that the optimiser was
>> making an assumption. It doesn't seem even to have a way to turn on
>> warnings for all assumptions that the optimiser is making.
>
> Have you read the third part of the article Andrew Cooper posted? It
> explains this quite clearly: it is often not even possible to do this
> because so many of those assumptions interact, and where it _is_
> possible, it almost certainly does not give you the clear messages you
> expect.

Well, the summary from part 3 is:

People often ask why the compiler doesn't produce warnings when it is 
taking advantage of undefined behavior to do an optimization, since any 
such case might actually be a bug in the user code. The challenges with 
this approach are that it is 1) likely to generate far too many warnings 
to be useful - because these optimizations kick in all the time when 
there is no bug, 2) it is really tricky to generate these warnings only 
when people want them, and 3) we have no good way to express (to the 
user) how a series of optimizations combined to expose the opportunity 
being optimized.

My response(s).

(1. Likely to generate too many warnings.) That is surely not a reason 
to give a programmer the option. Similar could have been said of the 
original C compiler but people liked "lint". Also, he says that the LLVM 
IR doesn't carry enough info from the frontend. Of course, it could 
carry more than it does. And it might be up to the C frontend to flag up 
UB code. After all, the frontend know in C terms what is defined and 
what is not.

(2. Tricky to generate only when wanted.) Simple: make the warnings 
"turn offable". Then a programmer can choose a compilation run to 
generate and investigate such warnings. That would/could restrict the 
warnings to the specific TUs which were compiled with such warnings 
enabled.

(3. No good way to report.) Not sure about this one. I don't think 
anyone would envisage detailed reports such as the one he gives as an 
example.

 > It really is much more complicated than you presume it to be.
 > Maybe in such simple demonstration code as you posted you can force a
 > meaning, but certainly in any realistic code base, you're trying to
 > combat the tide.

Are you saying that realistic code contains lots of fragments that will 
lead to UB? That surprises me a little. I'm sure others have suggested 
that programmers should avoid UB code.

Maybe it's personal preference. I find compiler warnings cut down 
development time. Am quite happy to do more work and to go by the rules 
if it helps produce robust code.

-- 
James Harris

Thread

gcc failure (optimised/non-optimised) James Harris <james.harris.1@gmail.com> - 2017-04-22 09:06 +0100
  Re: gcc failure (optimised/non-optimised) Andrew Cooper <amc96@cam.ac.uk> - 2017-04-22 09:49 +0100
    Re: gcc failure (optimised/non-optimised) James Harris <james.harris.1@gmail.com> - 2017-04-22 10:52 +0100
      Re: gcc failure (optimised/non-optimised) Gareth Owen <gwowen@gmail.com> - 2017-04-22 11:37 +0100
        Re: gcc failure (optimised/non-optimised) James Harris <james.harris.1@gmail.com> - 2017-04-24 09:07 +0100
          Re: gcc failure (optimised/non-optimised) Keith Thompson <kst-u@mib.org> - 2017-04-24 08:33 -0700
            Re: gcc failure (optimised/non-optimised) James Harris <james.harris.1@gmail.com> - 2017-04-28 22:32 +0100
              Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-04-28 14:53 -0700
                Re: gcc failure (optimised/non-optimised) Gareth Owen <gwowen@gmail.com> - 2017-04-29 07:00 +0100
                Re: gcc failure (optimised/non-optimised) Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-04-29 11:19 +0100
                Re: gcc failure (optimised/non-optimised) Gareth Owen <gwowen@gmail.com> - 2017-04-29 11:30 +0100
      Re: gcc failure (optimised/non-optimised) Noob <root@127.0.0.1> - 2017-04-22 16:12 +0200
        Re: gcc failure (optimised/non-optimised) James Harris <james.harris.1@gmail.com> - 2017-04-24 09:16 +0100
      Re: gcc failure (optimised/non-optimised) Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-04-23 05:41 -0500
        Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-04-23 14:14 -0700
          Re: gcc failure (optimised/non-optimised) Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-04-24 04:04 -0500
        Re: gcc failure (optimised/non-optimised) James Harris <james.harris.1@gmail.com> - 2017-04-24 09:22 +0100
          Re: gcc failure (optimised/non-optimised) "James R. Kuyper" <jameskuyper@verizon.net> - 2017-04-24 12:05 -0400
            Re: gcc rules OK (optimised/non-optimised) "James R. Kuyper" <jameskuyper@verizon.net> - 2017-04-24 17:06 -0400
              Re: gcc rules OK (optimised/non-optimised) supercat@casperkitty.com - 2017-04-24 15:06 -0700
    Re: gcc failure (optimised/non-optimised) raltbos@xs4all.nl (Richard Bos) - 2017-04-22 21:31 +0000
  Re: gcc failure (optimised/non-optimised) raltbos@xs4all.nl (Richard Bos) - 2017-04-22 09:29 +0000
    Re: gcc failure (optimised/non-optimised) bartc <bc@freeuk.com> - 2017-04-22 10:47 +0100
      Re: gcc failure (optimised/non-optimised) James Harris <james.harris.1@gmail.com> - 2017-04-22 11:36 +0100
        Re: gcc failure (optimised/non-optimised) gazelle@shell.xmission.com (Kenny McCormack) - 2017-04-22 13:50 +0000
          Re: gcc failure (optimised/non-optimised) bartc <bc@freeuk.com> - 2017-04-22 15:35 +0100
            Re: gcc failure (optimised/non-optimised) James Harris <james.harris.1@gmail.com> - 2017-04-24 09:36 +0100
              Re: gcc failure (optimised/non-optimised) Keith Thompson <kst-u@mib.org> - 2017-04-24 08:37 -0700
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-04-25 11:07 +0200
                Re: gcc failure (optimised/non-optimised) Keith Thompson <kst-u@mib.org> - 2017-04-25 11:57 -0700
          Re: gcc failure (optimised/non-optimised) James Harris <james.harris.1@gmail.com> - 2017-04-24 09:34 +0100
            Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-04-24 11:25 +0200
          Re: gcc failure (optimised/non-optimised) Tim Rentsch <txr@alumni.caltech.edu> - 2017-04-27 13:57 -0700
        Re: gcc failure (optimised/non-optimised) Tim Rentsch <txr@alumni.caltech.edu> - 2017-04-27 13:38 -0700
          Re: gcc failure (optimised/non-optimised) James Harris <james.harris.1@gmail.com> - 2017-04-28 22:38 +0100
      Re: gcc failure (optimised/non-optimised) Keith Thompson <kst-u@mib.org> - 2017-04-22 08:35 -0700
        Re: gcc failure (optimised/non-optimised) bartc <bc@freeuk.com> - 2017-04-22 17:16 +0100
          Re: gcc failure (optimised/non-optimised) bartc <bc@freeuk.com> - 2017-04-22 18:55 +0100
          Re: gcc failure (optimised/non-optimised) Noob <root@127.0.0.1> - 2017-04-22 21:04 +0200
          Re: gcc failure (optimised/non-optimised) Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-04-22 21:51 +0100
          Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-04-22 14:56 -0700
          Re: gcc failure (optimised/non-optimised) Noob <root@127.0.0.1> - 2017-04-30 16:49 +0200
            Re: gcc failure (optimised/non-optimised) Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-04-30 16:02 +0100
              Re: gcc failure (optimised/non-optimised) Robert Wessel <robertwessel2@yahoo.com> - 2017-04-30 11:51 -0500
              Re: gcc failure (optimised/non-optimised) Noob <root@127.0.0.1> - 2017-04-30 21:42 +0200
            Re: gcc failure (optimised/non-optimised) bartc <bc@freeuk.com> - 2017-04-30 17:35 +0100
              Re: gcc failure (optimised/non-optimised) Robert Wessel <robertwessel2@yahoo.com> - 2017-04-30 11:57 -0500
                Re: gcc failure (optimised/non-optimised) bartc <bc@freeuk.com> - 2017-04-30 18:44 +0100
                Re: gcc failure (optimised/non-optimised) David Kleinecke <dkleinecke@gmail.com> - 2017-04-30 11:34 -0700
                Re: gcc failure (optimised/non-optimised) Keith Thompson <kst-u@mib.org> - 2017-04-30 12:03 -0700
                Re: gcc failure (optimised/non-optimised) David Kleinecke <dkleinecke@gmail.com> - 2017-04-30 15:30 -0700
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-04-30 21:18 +0200
                Re: gcc failure (optimised/non-optimised) David Kleinecke <dkleinecke@gmail.com> - 2017-04-30 15:33 -0700
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-01 16:27 +0200
                Re: gcc failure (optimised/non-optimised) David Kleinecke <dkleinecke@gmail.com> - 2017-05-01 10:16 -0700
                Re: gcc failure (optimised/non-optimised) Keith Thompson <kst-u@mib.org> - 2017-05-01 11:34 -0700
                Re: gcc failure (optimised/non-optimised) David Kleinecke <dkleinecke@gmail.com> - 2017-05-03 12:43 -0700
                Re: gcc failure (optimised/non-optimised) Keith Thompson <kst-u@mib.org> - 2017-05-03 12:54 -0700
                Re: gcc failure (optimised/non-optimised) David Kleinecke <dkleinecke@gmail.com> - 2017-05-03 17:49 -0700
                Re: gcc failure (optimised/non-optimised) Keith Thompson <kst-u@mib.org> - 2017-05-03 18:05 -0700
                Re: gcc failure (optimised/non-optimised) David Kleinecke <dkleinecke@gmail.com> - 2017-05-03 20:37 -0700
                Re: gcc failure (optimised/non-optimised) GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-05-04 10:22 +0200
                Re: gcc failure (optimised/non-optimised) bartc <bc@freeuk.com> - 2017-05-04 11:01 +0100
                Re: gcc failure (optimised/non-optimised) GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-05-04 12:18 +0200
                Re: gcc failure (optimised/non-optimised) bartc <bc@freeuk.com> - 2017-05-04 11:55 +0100
                Re: gcc failure (optimised/non-optimised) GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-05-04 15:14 +0200
                Re: gcc failure (optimised/non-optimised) Keith Thompson <kst-u@mib.org> - 2017-05-04 09:34 -0700
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-04 10:09 -0700
                Re: gcc failure (optimised/non-optimised) bartc <bc@freeuk.com> - 2017-05-04 18:25 +0100
                Re: gcc failure (optimised/non-optimised) Keith Thompson <kst-u@mib.org> - 2017-05-04 11:28 -0700
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-04 11:53 -0700
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-04 13:07 +0200
                Re: gcc failure (optimised/non-optimised) bartc <bc@freeuk.com> - 2017-05-04 14:19 +0100
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-04 16:44 +0200
                Re: gcc failure (optimised/non-optimised) David Kleinecke <dkleinecke@gmail.com> - 2017-05-04 13:09 -0700
                Re: gcc failure (optimised/non-optimised) Ian Collins <ian-news@hotmail.com> - 2017-05-05 08:17 +1200
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-04 22:26 +0200
                Re: gcc failure (optimised/non-optimised) David Kleinecke <dkleinecke@gmail.com> - 2017-05-04 13:38 -0700
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-04 22:49 +0200
                Re: gcc failure (optimised/non-optimised) David Kleinecke <dkleinecke@gmail.com> - 2017-05-04 19:58 -0700
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-05 10:32 +0200
                Re: gcc failure (optimised/non-optimised) David Kleinecke <dkleinecke@gmail.com> - 2017-05-05 12:53 -0700
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-04 13:51 -0700
                Re: gcc failure (optimised/non-optimised) Ian Collins <ian-news@hotmail.com> - 2017-05-05 08:58 +1200
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-04 14:45 -0700
                Re: gcc failure (optimised/non-optimised) Gareth Owen <gwowen@gmail.com> - 2017-05-05 06:41 +0100
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-05 10:40 -0700
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-06 13:21 +0200
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-06 11:26 -0700
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-06 22:52 +0200
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-07 19:01 -0700
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-08 11:09 +0200
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-07 19:48 -0700
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-08 11:17 +0200
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-08 06:36 -0700
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-08 16:21 +0200
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-08 09:16 -0700
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-08 21:20 +0200
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-08 13:07 -0700
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-08 22:46 +0200
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-08 14:38 -0700
                Re: gcc failure (optimised/non-optimised) scott@slp53.sl.home (Scott Lurndal) - 2017-05-08 21:16 +0000
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-08 15:09 -0700
                Re: gcc failure (optimised/non-optimised) "Chris M. Thomasson" <invalid@invalid.invalid> - 2017-05-08 15:14 -0700
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-08 15:43 -0700
                Re: gcc failure (optimised/non-optimised) "Chris M. Thomasson" <invalid@invalid.invalid> - 2017-05-08 16:56 -0700
                Re: gcc failure (optimised/non-optimised) "Chris M. Thomasson" <invalid@invalid.invalid> - 2017-05-08 16:57 -0700
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-08 17:27 -0700
                Re: gcc failure (optimised/non-optimised) "Chris M. Thomasson" <invalid@invalid.invalid> - 2017-05-08 17:41 -0700
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-09 06:16 -0700
                Re: gcc failure (optimised/non-optimised) "Chris M. Thomasson" <invalid@invalid.invalid> - 2017-05-09 12:11 -0700
                Re: gcc failure (optimised/non-optimised) raltbos@xs4all.nl (Richard Bos) - 2017-05-10 09:58 +0000
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-10 09:40 -0700
                Re: gcc failure (optimised/non-optimised) "Chris M. Thomasson" <invalid@invalid.invalid> - 2017-05-10 12:05 -0700
                Re: gcc failure (optimised/non-optimised) scott@slp53.sl.home (Scott Lurndal) - 2017-05-09 13:55 +0000
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-09 09:26 -0700
                Re: gcc failure (optimised/non-optimised) Robert Wessel <robertwessel2@yahoo.com> - 2017-05-09 13:56 -0500
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-09 14:19 -0700
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-10 14:22 +0200
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-10 09:26 -0700
                Re: gcc failure (optimised/non-optimised) Robert Wessel <robertwessel2@yahoo.com> - 2017-05-10 17:36 -0500
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-11 01:12 +0200
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-10 21:15 -0700
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-11 10:41 +0200
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-11 15:32 -0700
                Re: gcc failure (optimised/non-optimised) Robert Wessel <robertwessel2@yahoo.com> - 2017-05-12 01:54 -0500
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-12 07:45 -0700
                Re: gcc failure (optimised/non-optimised) Robert Wessel <robertwessel2@yahoo.com> - 2017-05-12 23:52 -0500
                Re: gcc failure (optimised/non-optimised) Tim Rentsch <txr@alumni.caltech.edu> - 2017-05-14 12:57 -0700
                Re: gcc failure (optimised/non-optimised) "Chris M. Thomasson" <invalid@invalid.invalid> - 2017-05-10 21:56 -0700
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-11 10:45 +0200
                Re: gcc failure (optimised/non-optimised) "Chris M. Thomasson" <invalid@invalid.invalid> - 2017-05-11 14:43 -0700
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-12 10:55 +0200
                Re: gcc failure (optimised/non-optimised) joel.rees@gmail.com - 2017-05-12 07:30 -0700
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-12 09:02 -0700
                Re: gcc failure (optimised/non-optimised) "Chris M. Thomasson" <invalid@invalid.invalid> - 2017-05-14 13:14 -0700
                Re: gcc failure (optimised/non-optimised) Robert Wessel <robertwessel2@yahoo.com> - 2017-05-14 16:04 -0500
                Re: gcc failure (optimised/non-optimised) Robert Wessel <robertwessel2@yahoo.com> - 2017-05-10 17:33 -0500
                Re: gcc failure (optimised/non-optimised) scott@slp53.sl.home (Scott Lurndal) - 2017-05-09 13:51 +0000
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-09 09:14 -0700
                Re: gcc failure (optimised/non-optimised) scott@slp53.sl.home (Scott Lurndal) - 2017-05-08 21:07 +0000
                Re: gcc failure (optimised/non-optimised) Gareth Owen <gwowen@gmail.com> - 2017-05-09 18:30 +0100
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-05 10:44 +0200
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-05 10:42 +0200
                Re: gcc failure (optimised/non-optimised) scott@slp53.sl.home (Scott Lurndal) - 2017-05-05 14:10 +0000
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-05 17:12 +0200
                Re: gcc failure (optimised/non-optimised) scott@slp53.sl.home (Scott Lurndal) - 2017-05-04 15:08 +0000
                Re: gcc failure (optimised/non-optimised) Robert Wessel <robertwessel2@yahoo.com> - 2017-05-04 12:24 -0500
                Re: gcc failure (optimised/non-optimised) bartc <bc@freeuk.com> - 2017-05-04 18:29 +0100
                Re: gcc failure (optimised/non-optimised) scott@slp53.sl.home (Scott Lurndal) - 2017-05-04 18:07 +0000
                Re: gcc failure (optimised/non-optimised) GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-05-04 20:15 +0200
                Re: gcc failure (optimised/non-optimised) joel.rees@gmail.com - 2017-05-04 15:47 -0700
                Re: gcc failure (optimised/non-optimised) GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-05-05 01:22 +0200
                Re: gcc failure (optimised/non-optimised) joel.rees@gmail.com - 2017-05-04 18:57 -0700
                Re: gcc failure (optimised/non-optimised) GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-05-05 09:30 +0200
                Re: gcc failure (optimised/non-optimised) Tim Rentsch <txr@alumni.caltech.edu> - 2017-05-05 01:25 -0700
                Re: gcc failure (optimised/non-optimised) GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-05-05 10:33 +0200
                Re: gcc failure (optimised/non-optimised) Tim Rentsch <txr@alumni.caltech.edu> - 2017-05-05 10:10 -0700
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-05 12:49 +0200
                Re: gcc failure (optimised/non-optimised) joel.rees@gmail.com - 2017-05-05 18:31 -0700
                Re: gcc failure (optimised/non-optimised) Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2017-05-05 22:18 -0600
                Re: gcc failure (optimised/non-optimised) Tim Rentsch <txr@alumni.caltech.edu> - 2017-05-07 23:58 -0700
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-08 07:33 -0700
                Re: gcc failure (optimised/non-optimised) Tim Rentsch <txr@alumni.caltech.edu> - 2017-05-14 13:04 -0700
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-08 07:51 -0700
                Re: gcc failure (optimised/non-optimised) joel.rees@gmail.com - 2017-05-08 19:01 -0700
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-09 06:39 -0700
                Re: gcc failure (optimised/non-optimised) Tim Rentsch <txr@alumni.caltech.edu> - 2017-05-10 06:42 -0700
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-05 10:53 +0200
                Re: gcc failure (optimised/non-optimised) bartc <bc@freeuk.com> - 2017-05-05 00:33 +0100
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-05 10:54 +0200
                Re: gcc failure (optimised/non-optimised) David Kleinecke <dkleinecke@gmail.com> - 2017-05-04 13:31 -0700
                Re: gcc failure (optimised/non-optimised) Robert Wessel <robertwessel2@yahoo.com> - 2017-05-04 12:27 -0500
                Re: gcc failure (optimised/non-optimised) Tim Rentsch <txr@alumni.caltech.edu> - 2017-05-05 02:10 -0700
                Re: gcc failure (optimised/non-optimised) Robert Wessel <robertwessel2@yahoo.com> - 2017-05-07 22:56 -0500
                Re: gcc failure (optimised/non-optimised) David Kleinecke <dkleinecke@gmail.com> - 2017-05-04 13:00 -0700
                Re: gcc failure (optimised/non-optimised) Robert Wessel <robertwessel2@yahoo.com> - 2017-05-04 15:15 -0500
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-04 14:06 -0700
                Re: gcc failure (optimised/non-optimised) Robert Wessel <robertwessel2@yahoo.com> - 2017-05-05 00:43 -0500
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-04 13:31 -0700
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-01 21:52 +0200
                Re: gcc failure (optimised/non-optimised) GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-05-01 23:16 +0200
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-05-02 09:19 +0200
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-04-30 17:28 -0700
                Re: gcc failure (optimised/non-optimised) scott@slp53.sl.home (Scott Lurndal) - 2017-05-01 13:12 +0000
              Re: gcc failure (optimised/non-optimised) Noob <root@127.0.0.1> - 2017-04-30 22:23 +0200
            Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-04-30 10:08 -0700
              Re: gcc failure (optimised/non-optimised) Noob <root@127.0.0.1> - 2017-04-30 22:32 +0200
                Re: gcc failure (optimised/non-optimised) Keith Thompson <kst-u@mib.org> - 2017-04-30 13:59 -0700
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-04-30 17:47 -0700
                Re: gcc failure (optimised/non-optimised) joel.rees@gmail.com - 2017-04-30 21:49 -0700
            Re: gcc failure (optimised/non-optimised) Keith Thompson <kst-u@mib.org> - 2017-04-30 11:24 -0700
            Re: gcc failure (optimised/non-optimised) Tim Rentsch <txr@alumni.caltech.edu> - 2017-04-30 12:45 -0700
      Re: gcc failure (optimised/non-optimised) Andrey Tarasevich <andreytarasevich@hotmail.com> - 2017-04-23 23:11 -0700
        Re: gcc failure (optimised/non-optimised) bartc <bc@freeuk.com> - 2017-04-24 10:46 +0100
          Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-04-24 13:23 +0200
            Re: gcc failure (optimised/non-optimised) bartc <bc@freeuk.com> - 2017-04-24 15:38 +0100
              Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-04-24 17:31 +0200
                Re: gcc failure (optimised/non-optimised) Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-04-24 17:15 +0100
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-04-24 10:36 -0700
                Re: gcc failure (optimised/non-optimised) Keith Thompson <kst-u@mib.org> - 2017-04-24 12:06 -0700
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-04-24 14:03 -0700
                Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-04-25 11:09 +0200
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-04-24 10:25 -0700
              Re: gcc failure (optimised/non-optimised) Jorgen Grahn <grahn+nntp@snipabacken.se> - 2017-04-27 05:51 +0000
                Re: gcc failure (optimised/non-optimised) raltbos@xs4all.nl (Richard Bos) - 2017-05-01 09:08 +0000
                Re: gcc failure (optimised/non-optimised) bartc <bc@freeuk.com> - 2017-05-01 10:48 +0100
                Re: gcc failure (optimised/non-optimised) Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-05-01 11:39 +0100
                Re: gcc failure (optimised/non-optimised) Noob <root@127.0.0.1> - 2017-05-01 13:54 +0200
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-01 08:55 -0700
                Re: gcc failure (optimised/non-optimised) Robert Wessel <robertwessel2@yahoo.com> - 2017-05-01 12:18 -0500
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-01 11:03 -0700
                Re: gcc failure (optimised/non-optimised) Robert Wessel <robertwessel2@yahoo.com> - 2017-05-01 13:13 -0500
                Re: gcc failure (optimised/non-optimised) Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-05-01 19:47 +0100
                Re: gcc failure (optimised/non-optimised) scott@slp53.sl.home (Scott Lurndal) - 2017-05-01 18:51 +0000
                Re: gcc failure (optimised/non-optimised) Robert Wessel <robertwessel2@yahoo.com> - 2017-05-01 14:06 -0500
                Re: gcc failure (optimised/non-optimised) Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-05-01 21:05 +0100
                Re: gcc failure (optimised/non-optimised) Robert Wessel <robertwessel2@yahoo.com> - 2017-05-01 16:06 -0500
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-01 14:19 -0700
                Re: gcc failure (optimised/non-optimised) Keith Thompson <kst-u@mib.org> - 2017-05-01 08:41 -0700
                Re: gcc failure (optimised/non-optimised) raltbos@xs4all.nl (Richard Bos) - 2017-05-10 10:07 +0000
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-01 08:44 -0700
                Re: gcc failure (optimised/non-optimised) Keith Thompson <kst-u@mib.org> - 2017-05-01 09:03 -0700
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-01 09:51 -0700
                Re: gcc failure (optimised/non-optimised) Keith Thompson <kst-u@mib.org> - 2017-05-01 11:30 -0700
                Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-05-01 11:41 -0700
                Re: gcc failure (optimised/non-optimised) Keith Thompson <kst-u@mib.org> - 2017-05-01 11:51 -0700
            Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-04-24 08:51 -0700
              Re: gcc failure (optimised/non-optimised) Keith Thompson <kst-u@mib.org> - 2017-04-24 12:13 -0700
              Re: gcc failure (optimised/non-optimised) raltbos@xs4all.nl (Richard Bos) - 2017-05-01 09:11 +0000
        Re: gcc failure (optimised/non-optimised) Tim Rentsch <txr@alumni.caltech.edu> - 2017-04-27 14:04 -0700
    Re: gcc failure (optimised/non-optimised) James Harris <james.harris.1@gmail.com> - 2017-04-22 10:57 +0100
      Re: gcc failure (optimised/non-optimised) Gareth Owen <gwowen@gmail.com> - 2017-04-22 11:38 +0100
        Re: gcc failure (optimised/non-optimised) gazelle@shell.xmission.com (Kenny McCormack) - 2017-04-22 13:43 +0000
          Re: gcc failure (optimised/non-optimised) Gareth Owen <gwowen@gmail.com> - 2017-04-22 18:22 +0100
            Re: gcc failure (optimised/non-optimised) gazelle@shell.xmission.com (Kenny McCormack) - 2017-04-22 17:48 +0000
        Re: gcc failure (optimised/non-optimised) supercat@casperkitty.com - 2017-04-22 14:24 -0700
        Re: gcc failure (optimised/non-optimised) joel.rees@gmail.com - 2017-04-27 03:03 -0700
          Re: gcc failure (optimised/non-optimised) James Kuyper <jameskuyper@verizon.net> - 2017-04-27 10:12 -0400
      Re: gcc failure (optimised/non-optimised) raltbos@xs4all.nl (Richard Bos) - 2017-04-22 21:48 +0000
        Re: gcc failure (optimised/non-optimised) James Harris <james.harris.1@gmail.com> - 2017-04-24 10:14 +0100
          Re: gcc failure (optimised/non-optimised) bartc <bc@freeuk.com> - 2017-04-24 10:33 +0100
          Re: gcc failure (optimised/non-optimised) David Brown <david.brown@hesbynett.no> - 2017-04-24 13:32 +0200
  Re: gcc failure (optimised/non-optimised) scott@slp53.sl.home (Scott Lurndal) - 2017-04-24 13:47 +0000
  Re: gcc failure (optimised/non-optimised) Noob <root@127.0.0.1> - 2017-04-26 08:53 +0200

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