Subject: Re: more agressive kernel and std library build cflags
To: Laine Stump <laine@morningstar.com>
From: Bill Sommerfeld <sommerfeld@orchard.medford.ma.us>
List: port-i386
Date: 01/21/1997 19:19:37
I've done a few full system builds of 1.2B on i386 with -O2 (on a
486/33.  It takes the better part of a day to a day and a half).

With respect to your suggested compiler flags:

	-O6 -fomit-frame-pointer -m486

My understanding is that there is no difference between -O2 and -O6 in
gcc for the x86 architecture.

I did not use -fomit-frame-pointer as it makes debugging more
difficult; I did not use -m486 as it is reputed to mostly bloat code
space (by inserting nop's before loop labels) without making things
run that much faster.

The system *seems* to feel faster, but it's hard to tell, and
everything *seems* to be working..

					- Bill