Development of Linux for the HP PA-RISC platform

Kyle McMartin | 23 Aug 2006 13:52

Re: Bug#342545: qt-x11-free FTBFS

On Wed, Aug 23, 2006 at 10:39:04AM +0200, Matthias Klose wrote:
> The qt-x11-free package builds fine with a standard Debian setup.
> Building with prctl --unaligned=signal makes the "bug" reproducible.
> 

Right. The buildd is set up to deliver SIGBUS on unaligned accesses.
This is configurable, and not the default kernel behaviour. It is,
however, a Good Thing(tm). Unaligned accesses are quite costly, so
catching and fixing them on the buildd is ideal. However, in most cases
they are nontrivial to fix and should be rebuilt and uploaded and a 
bug filed with upstream...

When I initially added prctl for parisc, iirc there were three options
logging an unaligned access, delivering a SIGBUS, or silently catching
it and continuing on.

I have a machine that can be used to do these rebuilds, if need be.

Cheers,
	Kyle

headers

Steve Langasek | 24 Aug 2006 02:22

Bug#342545: qt-x11-free FTBFS

reassign 342545 qt-x11-free
thanks

On Wed, Aug 23, 2006 at 07:52:48AM -0400, Kyle McMartin wrote:
> On Wed, Aug 23, 2006 at 10:39:04AM +0200, Matthias Klose wrote:
> > The qt-x11-free package builds fine with a standard Debian setup.
> > Building with prctl --unaligned=signal makes the "bug" reproducible.

> Right. The buildd is set up to deliver SIGBUS on unaligned accesses.
> This is configurable, and not the default kernel behaviour. It is,
> however, a Good Thing(tm). Unaligned accesses are quite costly, so
> catching and fixing them on the buildd is ideal. However, in most cases
> they are nontrivial to fix and should be rebuilt and uploaded and a 
> bug filed with upstream...

> When I initially added prctl for parisc, iirc there were three options
> logging an unaligned access, delivering a SIGBUS, or silently catching
> it and continuing on.

> I have a machine that can be used to do these rebuilds, if need be.

That would be wonderful if you, or another hppa porter, could track down
where the bug lies.  libgcc2 is almost certainly the wrong package, since
nothing should be *using* libgcc2 in a fresh build of qt-x11-free; it may be
a bug in libgcc4 instead, but I think that's yet to be determined.  In the
meantime, I think it's best to reassign this back to qt-x11-free.

Thanks,
--

-- 
Steve Langasek                   Give me a lever long enough and a Free OS

(Continue reading)

headers

Steve Langasek | 24 Aug 2006 02:22

Bug#342545: qt-x11-free FTBFS

reassign 342545 qt-x11-free
thanks

On Wed, Aug 23, 2006 at 07:52:48AM -0400, Kyle McMartin wrote:
> On Wed, Aug 23, 2006 at 10:39:04AM +0200, Matthias Klose wrote:
> > The qt-x11-free package builds fine with a standard Debian setup.
> > Building with prctl --unaligned=signal makes the "bug" reproducible.

> Right. The buildd is set up to deliver SIGBUS on unaligned accesses.
> This is configurable, and not the default kernel behaviour. It is,
> however, a Good Thing(tm). Unaligned accesses are quite costly, so
> catching and fixing them on the buildd is ideal. However, in most cases
> they are nontrivial to fix and should be rebuilt and uploaded and a 
> bug filed with upstream...

> When I initially added prctl for parisc, iirc there were three options
> logging an unaligned access, delivering a SIGBUS, or silently catching
> it and continuing on.

> I have a machine that can be used to do these rebuilds, if need be.

That would be wonderful if you, or another hppa porter, could track down
where the bug lies.  libgcc2 is almost certainly the wrong package, since
nothing should be *using* libgcc2 in a fresh build of qt-x11-free; it may be
a bug in libgcc4 instead, but I think that's yet to be determined.  In the
meantime, I think it's best to reassign this back to qt-x11-free.

Thanks,
--

-- 
Steve Langasek                   Give me a lever long enough and a Free OS

(Continue reading)

headers

Steve Langasek | 24 Aug 2006 02:22

Bug#342545: qt-x11-free FTBFS

reassign 342545 qt-x11-free
thanks

On Wed, Aug 23, 2006 at 07:52:48AM -0400, Kyle McMartin wrote:
> On Wed, Aug 23, 2006 at 10:39:04AM +0200, Matthias Klose wrote:
> > The qt-x11-free package builds fine with a standard Debian setup.
> > Building with prctl --unaligned=signal makes the "bug" reproducible.

> Right. The buildd is set up to deliver SIGBUS on unaligned accesses.
> This is configurable, and not the default kernel behaviour. It is,
> however, a Good Thing(tm). Unaligned accesses are quite costly, so
> catching and fixing them on the buildd is ideal. However, in most cases
> they are nontrivial to fix and should be rebuilt and uploaded and a 
> bug filed with upstream...

> When I initially added prctl for parisc, iirc there were three options
> logging an unaligned access, delivering a SIGBUS, or silently catching
> it and continuing on.

> I have a machine that can be used to do these rebuilds, if need be.

That would be wonderful if you, or another hppa porter, could track down
where the bug lies.  libgcc2 is almost certainly the wrong package, since
nothing should be *using* libgcc2 in a fresh build of qt-x11-free; it may be
a bug in libgcc4 instead, but I think that's yet to be determined.  In the
meantime, I think it's best to reassign this back to qt-x11-free.

Thanks,
--

-- 
Steve Langasek                   Give me a lever long enough and a Free OS

(Continue reading)