Bug#394311: libgl1-mesa-dri: i965_dri.so miscompiled with current gcc

[Michel Dänzer]

On Sat, 2006-10-21 at 18:52 +0100, Ben Hutchings wrote:
> On Sat, 2006-10-21 at 12:08 -0400, Ryan Richter wrote:
> > On Sat, Oct 21, 2006 at 10:18:41AM +0200, Michel Dänzer wrote:
> > > On Fri, 2006-10-20 at 12:47 -0400, ryan at tau.solarneutrino.net wrote:
> > > > Package: libgl1-mesa-dri
> > > > Version: 6.5.1-0.2
> > > > Severity: normal
> > > > 
> > > > The current build contains a faulty i965_dri.so causing all GL clients
> > > > to crash and lock up the display.  This is apparently caused by a
> > > > miscompilation with gcc-4.1.  Rebuilding with gcc-3.4 fixes the problem.
> > > 
> > > Ben, do you happen to know whether this was built with
> > > -fno-strict-aliasing? If not, that might be worth a try, as the Mesa
> > > code generally isn't strict aliasing safe.
> > 
> > I can't find -fno-strict-aliasing anywhere in configs/debian*, so I
> > don't think anything is built with that.
> 
> I didn't modify any of the build options, so I suppose I can't have used
> -fno-strict-aliasing.  Unfortunately pbuilder doesn't log (or I have not
> configured it to, if that's possible).

There's --logfile, but I usually just do

<pbuilder command line> 2>&1 | tee <logfile>

You have my sincere respect for using pbuilder in the first place
though. :)


> You had better try that because I don't have any machine with an i965 to
> test on.

Yes, please try it Ryan.


-- 
Earthling Michel Dänzer           |          http://tungstengraphics.com
Libre software enthusiast         |          Debian, X and DRI developer