From: Mark Knecht <markknecht@gmail.com>
To: gentoo-amd64@lists.gentoo.org
Subject: Re: [gentoo-amd64] Re: GCC-4.5.2 Has Serious Problems
Date: Thu, 30 Jun 2011 21:36:38 -0700 [thread overview]
Message-ID: <BANLkTi=EGgO7mewhFRpxqF2usULcevo0JQ@mail.gmail.com> (raw)
In-Reply-To: <20110630212321.ad403843.frank.peters@comcast.net>
On Thu, Jun 30, 2011 at 6:23 PM, Frank Peters <frank.peters@comcast.net> wrote:
> On Fri, 1 Jul 2011 00:58:46 +0000 (UTC)
> Duncan <1i5t5.duncan@cox.net> wrote:
>
>>
>> I had wondered if this might be an "undefined behavior" optimization bug,
>>
>
> Well, the amd64 users list may not be the appropriate place to discuss
> C programming, but the problem here stems from attempting to do things
> with C that are not supposed to be done with C. Such things are aptly
> called "tricks" because they stray away from the convention.
>
> Ideally, I suppose, for these purposes would be to use assembly language
> routines mixed into the C code. But this is not as easy as with the
> "tricks."
>
> Anyway, I'm glad I presented this issue. It has definitely improved
> my understanding. GCC has dozens, if not hundreds, of compile options
> and I know the actual function of only a small few.
>
> Frank Peters
>
>
I think it's completely appropriate for this list. This distro expects
that we put CFLAG options in make.conf so I need to hear about this
stuff even if I don't have to background to completely understand
what's really causing the problem.
- Mark
next prev parent reply other threads:[~2011-07-01 4:38 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-30 21:45 [gentoo-amd64] GCC-4.5.2 Has Serious Problems Frank Peters
2011-06-30 22:30 ` Alex Schuster
2011-06-30 23:34 ` Frank Peters
2011-06-30 23:35 ` [gentoo-amd64] " Nikos Chantziaras
2011-06-30 23:44 ` Nikos Chantziaras
2011-07-01 0:04 ` Frank Peters
2011-07-01 0:11 ` Nikos Chantziaras
2011-07-01 0:58 ` Duncan
2011-07-01 1:23 ` Frank Peters
2011-07-01 1:52 ` Duncan
2011-07-01 2:15 ` Ian McCulloch
2011-07-01 4:36 ` Mark Knecht [this message]
2011-07-01 5:22 ` Frank Peters
2011-07-01 0:25 ` Frank Peters
2011-07-01 1:04 ` Frank Peters
2011-07-01 2:18 ` Duncan
2011-07-01 2:22 ` Barry Schwartz
2011-07-01 2:43 ` Frank Peters
2011-07-01 11:53 ` Nikos Chantziaras
2011-07-01 16:53 ` Frank Peters
-- strict thread matches above, loose matches on Subject: below --
2011-07-01 2:30 Ian McCulloch
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