CFLAGS for a Stage 1

Xelinis · n00b Joined: 04 Jun 2007 Posts: 1

Okay guys, I'm doing a Gentoo Stage 1 install on my grandfather's laptop. It's an Intel Celeron @ 2.13 with 512MB of RAM. As far as CFLAGS go, what's the call? O3 or Os?

i92guboj · Posted: Mon Jun 04, 2007 1:27 am Post subject: Re: CFLAGS for a Stage 1

mudrii · l33t Joined: 26 Jun 2003 Posts: 789 Location: Singapore

same here go with -O2 or Os depend on the platform for x86 Os is good inaf for amd64 O2 should do it.
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user118696 · Apprentice Joined: 16 Sep 2005 Posts: 276

I've recently made a Stage1 install on my laptop (bootstrap.sh from Stage3) using these flags :

mark_alec · Posted: Mon Jun 04, 2007 8:34 am Post subject:

user118696 · Apprentice Joined: 16 Sep 2005 Posts: 276

depontius · Advocate Joined: 05 May 2004 Posts: 3509

You say this is your grandfather's laptop, not yours. In that case, the #1 goal is reliability, not speed. I would suggest either "-O2" since that's best-tested, or "-Os" because it's a Celeron with an undersized L2 cache, and is still pretty decently tested. But "-O3" is still frequently recommended against, is more likely to produce problems for your grandfather.

How far away does he live?
I maintain a Gentoo system for my mother, 600+ miles away.
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djdunn · l33t Joined: 26 Dec 2004 Posts: 810

-O3 is somewhat frowned upon in theory its better but at the same time it has drawbacks, the bigger memory usage and whatnot mentioned.

a stage 1 leaves all kinds of things installed that arent in the world file and stuff. thus all the stuff about a stage 1 on 3 install awhile ago but a stage one isnt recommended anymore. Back in the day, a stage one was THE way to do things but things change. It's not the way, at least not now.
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FastTurtle · Posted: Wed Jun 06, 2007 4:46 pm Post subject:

DJDUNN:
Actually, a stage1 install doesn't leave anything that's not in the world file or are you suggesting that a stage3 tarball, which BTW is built from a stage1 by catalyst has lots of stuff not in the world file?

Xelinis:
I'd suggest you start with a stage2 tarball instead as the only reason to even perform a stage1 with full bootstrap is when there's a change in the toolchain. Otherwise the stage2 offers the same options as you'd get with a stage1 except without the agravation of the stage1 failing. Another fact is you're doing this on a laptop and a stage1 really loads the CPU and I'd be more worried about overheating since the cooling capacity is pretty limited.

IF you aren't afraid of pulling the covers, I'd suggest you thoroughly clean both the vents and if possible the heatsink of the CPU to help cool things down. Also place it on an elevated oven rack to maximize cooling and yes I've built Gentoo on a laptop and had heating issues (Turion ML34 with 1GB of memory).

As to make options: I'd go with the Os because not only will it generate smaller code (it enables almost everything used by O2) but the resulting binaries are actually smaller in size, which on a slow laptop drive means faster loading.
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