On Sun February 20 2005 07:41 pm, Cameron Blackwood wrote: > It's at this stage that Id like to re-suggest that we consider > collecting a table of cflags and put in in the install or ppc docs. > Something like table with a sample line from /proc/cpuinfo and then > the stable and risky CFLAGS settings. >
You might check out: http://gentoo-wiki.com/Safe_Cflags You could start your own page, and start collecting the data. > > For my G5 (no bogomips entry?): > CFLAGS="-O2 -mcpu=G5 -pipe -maltivec -mabi=altivec -fno-strict-aliasing > -mpowerpc-gfxopt -mmultiple -mstring" > > > For my 800Mhz G3 laptop (1589.24 bogomips by the way:): > CFLAGS="-O2 -pipe -mcpu=750 -mpowerpc-gfxopt -mmultiple -mstring" > > > > A while ago I was md5sum'ing some iso images and I noticed my G5 > was _WAY_ slower than my G3 laptop and it was because Id dropped > the mcpu=G5 setting from my G5 CFLAGS. I realise that md5sum'ing is a > special case, but small changes can make a massive change. > > Even if the idea is too hard for gentoo as a whole, would it be > possible for gentoo-ppc? > > > Ive suggested it a few times in posts like: > > http://forums.gentoo.org/viewtopic-t-166999-highlight-.html > > but everyone seems to say that its too hard :-/ or that there are too > many combos to track (which I dont quite get, I mean gentoo runs on > what, a couple of hundred cpu variations? Wouldnt the pain that this > solves be worth it? :) > > I mean developers and iso releasers must work this stuff out.... :) > But I guess it would be harder in that one would need to collect the info > for cpu model and gcc version or maybe 'gentoo/portage version' too. > > Id comment that once we had the data, creating a script on the install > disk wouldnt be hard, but Im sure that would take away a little more > of the 'hacker' spirit of the whole install process :-) > > > cheers, > cam > > -- > / `Rev Dr' cam at darkqueen.org Roleplaying, virtual goth \ > < http://darkqueen.org Poly, *nix, Python, C/C++, genetics, ATM > > \ [+61 3] 9809 1523[h] skeptic, Evil GM(tm). Sysadmin for hire / > ---------- Random Quote ---------- > Don't kiss an elephant on the lips today. > > -- > gentoo-ppc-user@gentoo.org mailing list -- ******************************************* Dr. Erik Zeek Postdoctoral Research Associate Department of Physics and Astronomy The University of Georgia Athens, GA 30602-2451 Tel: 706-542-7293 Email: mailto:[EMAIL PROTECTED] Html: http://www.physast.uga.edu/~zeekec ******************************************* Against stupidity the very gods Themselves contend in vain. - Johann Christoph Friedrich von Schiller (1801) *******************************************
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