From owner-freebsd-questions Mon Dec 10 18:54:49 2001 Delivered-To: freebsd-questions@freebsd.org Received: from guru.mired.org (okc-65-31-201-166.mmcable.com [65.31.201.166]) by hub.freebsd.org (Postfix) with SMTP id B079237B405 for ; Mon, 10 Dec 2001 18:54:45 -0800 (PST) Received: (qmail 19558 invoked by uid 100); 11 Dec 2001 02:54:39 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15381.30062.938411.279006@guru.mired.org> Date: Mon, 10 Dec 2001 20:54:38 -0600 To: RJ45 Cc: questions@freebsd.org Subject: Re: compiling STABLE with specific cpu options. In-Reply-To: <11755123@toto.iv> X-Mailer: VM 6.90 under 21.1 (patch 14) "Cuyahoga Valley" XEmacs Lucid X-face: "5Mnwy%?j>IIV\)A=):rjWL~NB2aH[}Yq8Z=u~vJ`"(,&SiLvbbz2W`;h9L,Yg`+vb1>RG% *h+%X^n0EZd>TM8_IB;a8F?(Fb"lw'IgCoyM.[Lg#r\ X-Delivery-Agent: TMDA v0.42/Python 2.1.1 (freebsd4) From: "Mike Meyer" Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG RJ45 types: > Hello, > is it a good or BAD thing to compile STABLE using specific 'mcpu' options > ?? It depends on your compiler. > and the same is good or bad in compiling ports or kernel?? > I used mcpu=ev56 for my alpha CPU And I noticed I had some strange core > dump problem with some programs. Did you try recompiling without that option and see if it happened again? > Is it better not to include spefific mcpu options in make.conf > expefially building STABLE ?? I don't know about the alpha, but for the x86 line, it doesn't do any harm. It does some - minimal - amount of good. gcc has bugs when you start enabling optimizations, and you may see that kind of thing on the alpha processor for processor-specific flags. http://www.mired.org/home/mwm/ Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message