[SOLVED] Necessary to reinstall Gentoo after -march change?

[lunarg]

Hi

I just upgraded my pc at work from a Pentium 2 (400mhz) to a Pentium 3 (800mhz) (not that special, I know, but it's still a huge difference).

Before, on the P2, I was using these flags:

[Hayl]

change your flags to whatever you want and then do "emerge -e world". that command will rebuild every package so it all will all have the new flags. or, just let them slowly change the way you said.
_________________
"I do not fear computers. I fear lack of them." - Isaac Asimov

[lunarg]

If I do want to change it "slowly" (so with updating), would this cause inconsistencies or instabilities? (...since there are then packages built for different architectures)
_________________
Registered linux user #341804
Visit Black Manticore: http://www.blackmanticore.com/

[jbc28]

In the case of a processor upgrade I can't see it causing any problems (a P4 should support all the P2 options). A downgrade will undoubtedly lead to instabilities.
I'd upgrade packages slowly as you suggest, unless your pc has lots of time on its hands.
J

[lunarg]

Then I'll go with the "slow" update method, although I'm going to recompile things like the kernel, gcc, and some libs (glibc, glib, ...), since I've noticed inconsistencies on a testing server when trying to insmod drivers compiled for P2 on a kernel compiled for 386.
In fact, think I'm going to make a "stage4" backup before I start.

Thank you all for the help.
_________________
Registered linux user #341804
Visit Black Manticore: http://www.blackmanticore.com/

[jbc28]

I think the kernel compilation optimizations are much more aggressive than setting march so I think you should be OK. That said, better backed up than not!
J