Date: Tue, 12 Sep 2006 13:19:49 -0700 (PDT)
From: "Freddie Cash" <fcash@ocis.net>
To: stable@freebsd.org
Subject: Re: optimization levels for 6-STABLE build{kernel,world}
Message-ID: <50575.142.24.8.227.1158092389.squirrel@webmail.sd73.bc.ca>
In-Reply-To: <20060912161603.R1031@ganymede.hub.org>
References: <20060912161603.R1031@ganymede.hub.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, September 12, 2006 12:22 pm, Marc G. Fournier wrote: > What are ppl currently using for CFLAGS/COPTFLAGS in /etc/make.conf > for building kernel/world? I know awhile back it wasn't recommended > to go above -O2, for instance, but suspect that has changed ... ? The defaults are "-O2 -pipe -fno-strict-aliasing". I stopped manually setting CFLAGS/COPTFLAGS around the time of 5.1 and haven't really noticed any changes in performance. Prior to that, I used "-Os -pipe". There are reported problems with not using -fno-strict-aliasing with parts of the base and/or kernel. And, the first thing anyone will tell you if you run into any compile/runtime errors is to put CFLAGS/COPTFLAGS back to the defaults. :) ---- Freddie Cash fcash@ocis.net
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?50575.142.24.8.227.1158092389.squirrel>