From: "Charles Coffing" <ccoffing@novell.com>
To: Andi Kleen <ak@suse.de>
Cc: xen-devel@lists.xensource.com
Subject: Re: [PATCH] clean up CFLAGS
Date: Fri, 10 Mar 2006 10:35:08 -0500 [thread overview]
Message-ID: <44113A29.D169.003C.0@novell.com> (raw)
In-Reply-To: <p73slpquzfr.fsf@verdi.suse.de>
-O2 actually tends to be my preference too for the same reason, but I
was just rearranging the existing options.
I've certainly seen cases (prior to Xen, though) where -O3 was slower
than -O2, probably due to cache effects.
>>> On Fri, Mar 10, 2006 at 7:50 AM, in message
<p73slpquzfr.fsf@verdi.suse.de>,
Andi Kleen <ak@suse.de> wrote:
> "Charles Coffing" <ccoffing@novell.com> writes:
>
>> This patch cleans up the usage of CFLAGS. This is nice for
packagers,
>> who would like to control the base compilation flags from a central
>> place.
>>
>> I've put some default CFLAGS (- Wall - O3)
>
> Are you sure - O3 is a good idea? In my experience it just bloats
> .text for most projects because of its aggressive inlining. I would
> use - O2.
>
> - Andi
prev parent reply other threads:[~2006-03-10 15:35 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-09 19:42 [PATCH] clean up CFLAGS Charles Coffing
2006-03-09 19:47 ` Keir Fraser
2006-03-09 20:16 ` Charles Coffing
2006-03-09 21:31 ` Keir Fraser
2006-03-09 20:18 ` Keir Fraser
2006-03-10 14:50 ` Andi Kleen
2006-03-10 14:58 ` Keir Fraser
2006-03-10 8:30 ` Andi Kleen
2006-03-10 16:30 ` Keir Fraser
2006-03-10 15:35 ` Charles Coffing [this message]
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