I have a build machine currently running the ia32 release of suse10.2.

It is running with a locally built "vanilla" kernel (2.6.23.1).

What I'd like to try is compiling the kernel sources for x86_64.  Is this
possible?  Do I need to obtain or build special cross compiler packages to
build x86_64 images under ia32?

If I already have 32-bit packages installed, is it possible to boot
successfully with a 64-bit kernel?  I.e. supposedly one can run 32-bit
programs on a 64-bit machine, yes?  Does this mean I could run my
currently installed 32-bit packages if I boot with a 64-bit kernel?
I'm not expecting to use such a setup in a production environment,
but more as an intermediate "test" state -- with the 64-bit packages
replacing the 32-bit packages after I've gotten the kernel to work.

If I have a 64-bit kernel (and packages), am I still able to build
32-bit kernels and packages?  The machine I'd like to upgrade to
64-bit is my primary build machine (it's 4-12x faster than the
other machines) so I want to be able to continue using it as
a 32-bit build machine.

Has anyone tried such setups?

Thanks,
Linda
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