kern/118121: RELENG_7 kernel compile fails with -Os
brde at optusnet.com.au
Tue Nov 20 02:10:03 PST 2007
The following reply was made to PR kern/118121; it has been noted by GNATS.
From: Bruce Evans <brde at optusnet.com.au>
To: Heikki Suonsivu <hsu at bbnetworks.net>
Cc: FreeBSD-gnats-submit at freebsd.org, freebsd-bugs at freebsd.org
Subject: Re: kern/118121: RELENG_7 kernel compile fails with -Os
Date: Tue, 20 Nov 2007 17:14:49 +1100 (EST)
On Mon, 19 Nov 2007, Heikki Suonsivu wrote:
> 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.
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