[gentoo-user] move instalation from one system to another one.

[Platoali]

Hi,

My old laptop  is dying. I'm going to move my gentoo installation to a new 
one.  The old one was an old Pentium-M and the new one is core due. I want to 
to tar the root and boot and ..  files from the old one to untar it to the 
new one. I want to know,  What packages needs to rebuild  (with What flags?) 
in the old one so that I would have a basic runable system  in the new that I 
can rebuild all the packages on the new system with the new FLAGS?

Did anyone do this in the past? Have anyone any experiences regarding this 
issue? Any comments? suggestions?

This is my old laptop make.conf

CHOST="i686-pc-linux-gnu"
CFLAGS="-march=pentium-m -O2 -pipe"
CXXFLAGS="${CFLAGS}"
MAKEOPTS="-j2"

Best regards
Ali Yazdi