Athlon to Pentium switch and necessary changes

unbound18 · n00b Joined: 13 Oct 2003 Posts: 50

I just finished a clean Gentoo install on my 1.0 Ghz Athlon. Everything was peachy. Then the motherboard blew up. So, my 2.4 Ghz Pentium 4 is on the way right now. I'll be swapping out my HDs and am wondering how this change will mess up my install. I imagine I have to add kernel support for my new motherboard before the switch. Once I get it up and running what will I have to do?
Would I be ok just changing the CFlags and doing an emerge -e world? Any advice on this one?
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Am I seriously still a n00b. What's up with that?

davidgurvich · Veteran Joined: 23 Apr 2004 Posts: 1063

If you compiled the applications without using flags specific to Athlon, and your kernel has generic x86 option set or you didn't compile kernel specifically for athlon, you will be fine. If the apps are generic but kernel isn't, you can boot new system with CD and generate new kernel. If apps were specifically compiled for athlon, you would have to find another athlon system, install HD there, recompile system and kernel using generic options, install into your P4 system and either recompile for P4 or use existing system.

unbound18 · n00b Joined: 13 Oct 2003 Posts: 50

Wow. My Athlon system still runs at this point. I guess that makes sense to compile everything to generic and then recompile it to be optimized for a P4. Are you sure my entire system has to be compiled like that. Couldn't I just recompile GCC and my kernel to use the generic x86 setting, then throw the HD into my new system adn recompile everything? That would save me some time, but I don't know how much I would have to recompile to make GCC go.. or something. Thoughts?
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Am I seriously still a n00b. What's up with that?

freelight · Posted: Sun Aug 01, 2004 4:59 am Post subject:

For things like GCC, if you're worried about the compile time, you can just use prebuilt Pentium 4 binary packages from the package cd ISOs on the Gentoo mirrors.

davidgurvich · Veteran Joined: 23 Apr 2004 Posts: 1063

recompiling glibc and gcc might work, but I'm not certain which other programs would need to be recompiled. binutils and other programs would need to be recompiled. If you had list of all required programs, then piecemeal recompile would work.

unbound18 · n00b Joined: 13 Oct 2003 Posts: 50

I'm not worried so muchabout compile time. Just don't want to have random segfaults and get stuck with a borked system.
_________________
Am I seriously still a n00b. What's up with that?

unbound18 · n00b Joined: 13 Oct 2003 Posts: 50

What do you take from this?

davidgurvich · Veteran Joined: 23 Apr 2004 Posts: 1063

Try 'USE="-java" emerge ..'. From the list that would give eliminate java recompile, but I think you need everything else recompiled.