Gentoo Archives: gentoo-user

From: Michael Crute <mcrute@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Ideas for a mini-FAQ/HOWTO
Date: Sun, 11 Sep 2005 14:30:59
Message-Id: 558b73fb050911072562b9e308@mail.gmail.com
In Reply to: [gentoo-user] Ideas for a mini-FAQ/HOWTO by Walter Dnes
1 On 9/11/05, Walter Dnes <waltdnes@××××××××.org> wrote:
2 >
3 > 2) The generic portion of CFLAGS consists of those flags that do not
4 > begin with "-m". For that part, use "-O2 -pipe -fomit-frame-pointer"
5 >
6 > Please, do *NOT* use "-O3" (or higher!!!) or try to unroll every last
7 > loop or use every last exotic generic optimization. Your programs will
8 > *USUALLY* work, but they'll probably be flakier. They may be faster, or
9 > they may be slower. However, people will point their fingers at you and
10 > laugh. Developers will ignore you when a program blows up and you file
11 > a bug report. The only exception is if a developer specifically OK's
12 > special optimizations for specific modules or programs, and is willing
13 > to support those modules or programs with extra optimization. Things
14 > may change in future versions of gcc, but the 3.4.x series works best
15 > with the settings I've given.
16 >
17 >
18 It may be simpler to look at
19 http://www.freehackers.org/gentoo/gccflags/flag_gcc3.html for the cflags for
20 the processor.
21
22 -Mike
23
24 --
25 ________________________________
26 Michael E. Crute
27 Software Developer
28 SoftGroup Development Corporation
29
30 Linux, because reboots are for installing hardware.
31 "In a world without walls and fences, who needs windows and gates?"

Replies

Subject Author
Re: [gentoo-user] Ideas for a mini-FAQ/HOWTO Ciaran McCreesh <ciaranm@g.o>
Re: [gentoo-user] Ideas for a mini-FAQ/HOWTO Walter Dnes <waltdnes@××××××××.org>