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From: Chris Mason <chris.mason@fusionio.com>
To: Martin <m_btrfs@ml1.co.uk>, <linux-btrfs@vger.kernel.org>
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Subject: Re: progs integration branch moved to master (new default leafsize)
Date: Fri, 22 Nov 2013 14:57:29 -0500
Sender: linux-btrfs-owner@vger.kernel.org
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Quoting Martin (2013-11-22 14:50:17)
> On 22/11/13 13:40, Chris Mason wrote:
> > Quoting Martin (2013-11-22 04:03:41)
> 
> >>  * QA Notice: Package triggers severe warnings which indicate that it
> >>  *            may exhibit random runtime failures.
> >>  * disk-io.c:91:5: warning: dereferencing type-punned pointer will break
> >> strict-aliasing rules [-Wstrict-aliasing]
> >>  * volumes.c:1930:5: warning: dereferencing type-punned pointer will
> >> break strict-aliasing rules [-Wstrict-aliasing]
> >>  * volumes.c:1931:6: warning: dereferencing type-punned pointer will
> >> break strict-aliasing rules [-Wstrict-aliasing]
> > 
> > Does gentoo modify the optimizations from the Makefile?  We actually
> > have many strict-aliasing warnings, but I didn't think they came up
> > until -O2.
> 
> For that system, I have -Os set in the Gentoo "make.conf".
> 
> 
> > At any rate, I'm adding -fno-strict-aliasing just to be sure.
> 
> Good to catch to avoid unexpectedness,

Ok, please try with the current master to make sure the options are
being picked up properly.  If you're overriding the
-fno-strict-aliasing, please don't ;)

-chris