Date: Wed, 14 Jan 2009 21:44:07 +0100 From: t-u-t <marshc187@gmail.com> To: freebsd-questions@freebsd.org Subject: Re: kernel configuration Message-ID: <332f78510901141244y198e7be6qf3b34f306c03f232@mail.gmail.com> In-Reply-To: <B4DD918A-6026-4206-9C14-70DCD0028CFB@mac.com> References: <496E06D1.2070706@gmail.com> <20090114181522.GB4487@aurora.oekb.co.at> <B4DD918A-6026-4206-9C14-70DCD0028CFB@mac.com>
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On Wed, Jan 14, 2009 at 9:18 PM, Chuck Swiger <cswiger@mac.com> wrote: > On Jan 14, 2009, at 10:15 AM, Ewald Jenisch wrote: > >> On Wed, Jan 14, 2009 at 04:37:53PM +0100, icemaca wrote: >> >>> >>> this i386 version has >>> >>> cpu I486_CPU >>> cpu I586_CPU >>> cpu I686_CPU >>> >>> >> Basically you can comment all but I686_CPU since the others are for >> earlier x86 architectures. >> > > While it is true that you can comment out all but i686 and get a working > kernel, you will experience reduced performance. There are a number of > low-level assembly routines (cf sys/i386/i386/support.s such as i586_bcopy) > that are conditionalized off of I586_CPU only, even though they provide an > advantage on i686 platforms also. > > -- > -Chuck > so in any case it doesn't hurt to leave all 3. right? I have one last question though, is makeoptions DEBUG=g necessary if i am not debugging or is it always necessary to build the kernel properly? can i safely comment it out?
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