Date: Fri, 19 Mar 2010 17:28:06 +0100 From: Ivan Voras <ivoras@freebsd.org> To: netch@netch.kiev.ua Cc: svn-src-head@freebsd.org, Garrett Cooper <yanefbsd@gmail.com>, svn-src-all@freebsd.org, src-committers@freebsd.org, Xin LI <delphij@freebsd.org> Subject: Re: I486_CPU and I586_CPU removed from GENERIC kernel [was Re: svn commit: r205307 - head/sys/i386/conf] Message-ID: <9bbcef731003190928l165c6279p6244f0c97a92600a@mail.gmail.com> In-Reply-To: <20100319162249.GD67820@netch.kiev.ua> References: <7d6fde3d1003182333m336d52fbh987035a21568250d@mail.gmail.com> <9bbcef731003190913k4f3afbd8mb4e767c40433be8e@mail.gmail.com> <20100319162249.GD67820@netch.kiev.ua>
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On 19 March 2010 17:22, Valentin Nechayev <netch@netch.kiev.ua> wrote: > =C2=A0Fri, Mar 19, 2010 at 17:13:00, ivoras wrote about "Re: I486_CPU and= I586_CPU removed from GENERIC kernel [was Re: svn commit: r205307 - head/s= ys/i386/conf]": > >> SSE in the userland you mean? Regardless, I don't think there is now >> reason for compiling everything as for i386. E.g. why not add at least >> -mtune=3Dgeneric or even also -march=3Di686 to default gcc options? >> >> http://gcc.gnu.org/onlinedocs/gcc/i386-and-x86_002d64-Options.html > > Having userland compiled with i686 will give the same effect as i686-only > kernel: it won't boot on machines which doesn't conform to. If it is > supposed to boot on i486 and higher, no more than -march=3Di486 can be us= ed. Yes, this is how I read the change - the move from "i386" to "i686". I apologize if I got it wrong :) As it was pointed out earlier - small systems users and designers probably have special install procedures because of the nature of the business.
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