On Wed, 2003-08-20 at 08:56, stephen wrote:
I'm replacing my P3 850/Asus CUV4X with an Athlon 2700+/Asus A7N8X-X, but would like to keep my gentoo intact as much as I can.
Currently I use CFLAGS="-march=pentium3 -O3 -pipe -fomit-frame-pointer" and have things like mmx and sse in my USE flags (should I take those out and use 3dnow instead?). I also use LVM with vgroups for usr, usr/local, var and tmp.
I wonder if this will even boot now. Can anyone give me some hints about the best way to make the transition? Any help appreciated.
as i understand it, pretty much all of your binaries shouldn't work on your new machine since you chose to use -march=pentium3. my best suggestion would be to do the following (yes, it will take a very long time):
1. edit make.conf to have the following: CFLAGS="-mcpu=i686 -O3 -pipe" <remove "mmx" and "sse" from USE and add "3dnow">
The Athlon XP supports MMX.
2. # emerge --emptytree world
What about packages not in the world file?
emerge --emptytree --deep world
is needed to recompile those too, although I doubt they're necessary for this intermediate step.
3. install the new cpu
4. edit make.conf to have the following: CFLAGS="-mcpu=athlon-xp -O3 -pipe"
Why -mcpu? In case he moves back? :)
5. # emerge --emptytree world
emerge -eD world here, definitely.
to me, this seems like a bit of a sledgehammer approach, but it's the only way i would think you can be sure you'll be able to boot your system after installing the new cpu. someone please correct me if they know of a better solution.
I could only think of unpacking a i386 (or i686) stage1 over his system, which should give enough of a base system to boot and compile with. Not guaranteed though. Maybe stage2?
MAL
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