I thought that -O3 was a bad thing to do when compiling(it must be good for somthing but i thought -O2 was the safe option)?
----- Original Message ----- From: Tristan Scott trs@scott998.freeserve.co.uk Date: Wed, 11 Dec 2002 23:18:57 +0000 To: main@lists.alug.org.uk Subject: Re: [Alug] Re: Welcome to the "main" mailing list (Digest mode)
So, to start off. What distros are used by most of you, since I don't wanna start using a distro I can't get help for. Plus, I don't know which Distro would be best suited for a homeuser/developer/gamer.
Im running Gentoo. this is a good one if you're already into linux, or want to know a lot about 'bare-bones' system configuration, and everything is built from source. This means ive got a 10-20% spped advantage on the same hardware as everything is built for the athlon-tbird with -03 optimisations (-02 being normal, and binary distros are usually built for either a 486 or 686)
This is irrelevent for a newbie tho, i suggest using some distro that holds your hand... what language(s) do you write in? gentoo obviously has a good build environment, but i dont know about the big distros...
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NuTTeR -- Not Entered -- wrote:
I thought that -O3 was a bad thing to do when compiling(it must be
good for somthing but i thought -O2 was the safe option)?
Yes -02 is the normal 'safe' option. -03 gives good speed boosts (up to ~10% depending on code) but in the occasional scenario the optimised operation will not do /quite/ what is expected by the programmer. this is only ever encountered in /really/ terse programming, and i, building an entire linux system from scratch, kde, gnome, apache and loads of other stuff (i like to fiddle with stuff) - i never had a program which wouldnt compile due to optimisations. so -03 is damn safe enough for the extra speed. binary distros tend to be -02 686 or -02 486...
Tristan Scott alug@scott998.freeserve.co.uk writes:
NuTTeR -- Not Entered -- wrote:
I thought that -O3 was a bad thing to do when compiling(it must be good for somthing but i thought -O2 was the safe option)?
Yes -02 is the normal 'safe' option. -03 gives good speed boosts (up to ~10% depending on code) but in the occasional scenario the optimised operation will not do /quite/ what is expected by the programmer.
What semantic changes do you think are implied by -O3? The manual says it turns on -finline-functions and (-frename-registers, which could make debugging at least inconvenient but shouldn't change the actual behaviour of the running code.
To All,
I know this has been covered before but, do you think it might be worth having a page on the ALUG website telling all what Distros we run and/or prefer and why, and possibly what experience we have with other OSes.
To start it off maybe mail it too the list so we can help other members more effectively.
I run Slackware 8.1 on servers and firewalls and don't really run Linux on the desktop at all. Working for a training company if it ain't M$ Office or Windows then there's no point in training for it.
I have reasonable experience with Slackware 8.1, 8, 7 and 4. Windows 3.11, 9x, 2k (pro and Srv), NT 4 (pro and Srv) and XP Pro + Home.
I have used (as in played with) Redhat 7.2, Mandrake Firewall Edition, Mandrake desktop edition, FreeBSD (very briefly), older versions of Mac OS and .NET Server.
Next year I hope to do an LFS project, although still a bit scared at the moment! :o)
Kind Regards,
Michael
"The man who smiles when things go wrong, has found someone else to blame it on" - Author Unknown.
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http://www.alug.org.uk/contrib/?SystemDirectory Michael Sage wrote;
To All,
I know this has been covered before but, do you think it might be worth having a page on the ALUG website telling all what Distros we run and/or prefer and why, and possibly what experience we have with other OSes.
see http://www.alug.org.uk/contrib/?SystemDirectory
Keith :o)
see http://www.alug.org.uk/contrib/?SystemDirectory
Keith :o)
<hangs his head in RTFM shame> Doh! OK maybe we should make active use of it! ;o) </hangs his head in RTFM shame>
M :o|
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Michael Sage michael.sage@pitman-norwich.co.uk wrote:
I run Slackware 8.1 on servers and firewalls and don't really run Linux on the desktop at all. Working for a training company if it ain't M$ Office or Windows then there's no point in training for it.
Why not? If it's new to people, then they need training in it. I think we've gone past the point of "self-starting early adopters only" in a lot of places. I offer training in it, if anyone's interested. In the new year, I will probably start offering training programmes towards one of the major certifications (and no, it won't be RHCE...)
Why not? If it's new to people, then they need training in it. I think we've gone past the point of "self-starting early adopters only" in a lot
of
places. I offer training in it, if anyone's interested. In the new year,
I
will probably start offering training programmes towards one of the major certifications (and no, it won't be RHCE...)
-- MJR http://mjr.towers.org.uk/ IM: slef@jabber.at This is my home web site. This for Jabber Messaging.
How's my writing? Let me know via any of my contact details.
Because its not "commercially viable" not my opinion by the way, could explain why I am leaving this job at the end of the year! :o) Off to be a consultant, watch out M$ shops in Norwich here I come! ;o)
I am looking at the LPI Cert although there have been some really bad reviews of it....
So many choices so little time.
Regards,
M
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Michael Sage michael.sage@pitman-norwich.co.uk wrote:
Because its not "commercially viable" not my opinion by the way, could explain why I am leaving this job at the end of the year! :o) Off to be a consultant, watch out M$ shops in Norwich here I come! ;o)
Heh. Yes, I think you are making a good decision. It is frustrating that large companies can survive with such rampant conservatism.
I am looking at the LPI Cert although there have been some really bad reviews of it....
I've been looking at the LPI too, but am similarly worried by the bad reviews. As I said, I'll let you know what is decided.
So many choices so little time.
Same as it ever was... Same as it ever was... Same as it ever was...
Water dissolving... and water removing. There is water at the bottom of the ocean! Carry the water at the bottom of the ocean! Remove the water at the bottom of the ocean!
[From the album "Remain in Light" by Talking Heads]
NuTTeR -- Not Entered -- wrote:
I thought that -O3 was a bad thing to do when compiling(it must be good for somthing but i thought -O2 was the safe option)?
Yes -02 is the normal 'safe' option. -03 gives good speed boosts (up to ~10% depending on code) but in the occasional scenario the optimised operation will not do /quite/ what is expected by the programmer. this is only ever encountered in /really/ terse programming, and i, building an entire linux system from scratch, kde, gnome, apache and loads of other stuff (i like to fiddle with stuff) - i never had a program which wouldnt compile due to optimisations. so -03 is damn safe enough for the extra speed. binary distros tend to be -02 686 or -02 486...
-
Keith Watson -
Michael Sage -
MJ Ray -
NuTTeR -- Not Entered -- -
Richard Kettlewell -
Tristan Scott -
Tristan Scott