Sender:	root AT squid DOT netplus DOT net
Message-ID:	<36E48B4C.86B84AD1@netplus.net>
Date:	Mon, 08 Mar 1999 20:45:32 -0600
From:	Steve Bergman <steve AT netplus DOT net>
X-Mailer:	Mozilla 4.07 [en] (X11; I; Linux 2.2.2 i586)
MIME-Version:	1.0
To:	"pgcc AT delorie DOT com" <pgcc AT delorie DOT com>
Subject:	Optimizations questions
Reply-To:	pgcc AT delorie DOT com

I'm getting ready to recompile my RH5.2 system and 2.2.2 kernel.  I have an
AMDK6-2/300.  Would "-O6 -march=amdk6 -mcpu=amdk6" be reasonable options to set
in rpmrc?  What is the status of "-fstrength-reduce" and "-funroll-all-loops"
these days?  Are they stable enough to compile my whole system with?  Also, I'm
a bit unclear about the optimizations table in the faq.  When an option is
marked "U" but is shown to be invoked at, say, level -O4, what does that mean? 
At the top of the table it says it "must be explicitly enabled in its -foption
form".  Does that mean that you have to specify both -O4 and -foption to use
that optimization?  It seems a bit ambiguous.

I should add that this system is my own home system, and although I do most of
my work on it, it is not a "critical production system" by any means.  I can
afford to be at least a bit adventuresome, in the interest of performance and
testing. (At home, no one can here you scream...  ;-)  )

Thanks for any info,
Steve
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