I wrote:
> The only affected package on the LiveCD is libtheora-1.0alpha7, file
> lib/pp.c, lines 363 and 383.
According to the conversation on #theora, this is dead code.
Postprocessing is disabled by default, with no API to enable it.
--
Alexander E. Patrakov
--
http://linuxfromscratch.org/ma
2007/11/21, Bruce Dubbs <[EMAIL PROTECTED]>:
> Well, we only have xmms in BLFS and it is out of date. They just
> released a new xmms last week (after four years).
>
> I was curious and looked at the xmms source for both 1.2.10 and 1.2.11,
> but a grep couldn't find a use of abs() times a negative
Matthew Burgess wrote:
> On Wed, 21 Nov 2007 15:30:45 +0500, "Alexander E. Patrakov"
> <[EMAIL PROTECTED]> wrote:
>
>> The only affected package on the LiveCD is libtheora-1.0alpha7,
>> file lib/pp.c, lines 363 and 383. This piece of code does deringing
>> of the image, thus, the effect is expecte
On Wed, 21 Nov 2007 15:30:45 +0500, "Alexander E. Patrakov" <[EMAIL PROTECTED]>
wrote:
> The only affected package on the LiveCD is libtheora-1.0alpha7, file
> lib/pp.c, lines 363 and 383. This piece of code does deringing of the
> image, thus, the effect is expected to be visible with anime and
2007/11/21, Bruce Dubbs <[EMAIL PROTECTED]>:
> Alexander E. Patrakov wrote:
>
> > I will do a local build of the LiveCD with a patched gcc. The patch is
> > different from the official fix: I added a warning that fires if gcc
> > sees negative_const * abs(something). The intention is to grep throug
Alexander E. Patrakov wrote:
> I will do a local build of the LiveCD with a patched gcc. The patch is
> different from the official fix: I added a warning that fires if gcc
> sees negative_const * abs(something). The intention is to grep through
> the logs for this new warning and thus count all c
2007/11/21, Matthew Burgess <[EMAIL PROTECTED]>:
> But see http://www.ussg.iu.edu/hypermail/linux/kernel/0711.2/1296.html - the
> kernel uses it's own abs macro, so GCC never sees the call to abs().
> Therefore the kernel tarball isn't a suitable candidate to try finding
> instances of this bug
I just tried this with 4.0.3, 3.2.2, and 3.4.2, and the problem
is in all of those versions as well.
-- Original message --
From: Matthew Burgess <[EMAIL PROTECTED]>
>
> On Tue, 20 Nov 2007 12:06:54 -0600, Bruce Dubbs <[EMAIL PROTECTED]> wrote:
> > Alexander E. Pat
Matthew Burgess wrote:
> I think a patch would be the safest bet, if only to save those that
> like typing in the commands by hand some trouble.
>
>> Incorporating the patch in -dev is easy enough, but how should we
>> phrase the errata page?
>
> If we do put this into an errata, I think we'd ne
On Tue, 20 Nov 2007 12:06:54 -0600, Bruce Dubbs <[EMAIL PROTECTED]> wrote:
> Alexander E. Patrakov wrote:
>> Code from http://lkml.org/lkml/2007/11/19/493:
>>
>> #include
>> #include
>>
>> int main( void )
>> {
>> int i=2;
>> if( -10*abs (i-1) == 10*abs(i-1) )
>> printf ("OMG,-10==10 in l
Alexander E. Patrakov wrote:
> Code from http://lkml.org/lkml/2007/11/19/493:
>
> #include
> #include
>
> int main( void )
> {
> int i=2;
> if( -10*abs (i-1) == 10*abs(i-1) )
> printf ("OMG,-10==10 in linux!\n");
> else
> printf ("nothing special here\n") ;
> return 0 ;
> }
>
>
Code from http://lkml.org/lkml/2007/11/19/493:
#include
#include
int main( void )
{
int i=2;
if( -10*abs (i-1) == 10*abs(i-1) )
printf ("OMG,-10==10 in linux!\n");
else
printf ("nothing special here\n") ;
return 0 ;
}
GCC miscompiles this, because it thinks that, for builtin ab
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