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Date: Tue, 20 Nov 2007 17:14:49 +1100 (EST)
From: Bruce Evans <brde@optusnet.com.au>
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To: Heikki Suonsivu <hsu@bbnetworks.net>
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Cc: freebsd-bugs@freebsd.org, FreeBSD-gnats-submit@freebsd.org
Subject: Re: kern/118121: RELENG_7 kernel compile fails with -Os
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On Mon, 19 Nov 2007, Heikki Suonsivu wrote:

>> Description:
>
> 	When compiling kernel with -Os, gcc apparently finds some new
> 	possible warnings (possible uninitialized variables, etc).  This exits
> 	kernel compile.  -O2 does not trigger these.
>
> 	scsi_sa and scsi_ses were among the offending files, but there
> 	may be more.

-Os is also a large negative optimization (it increases size by about 50%)
in RELENG_7 (or probably just with gcc-4), due to bogus inlining flags.

Bruce