I have this old Pentium PC with 32MB RAM that I use for testing (read "breaking stuff, then fixing it"). The problem is that it takes a very long time to compile a new kernel for it (we're talking over a week here). So, I want to actually do the compile step on another computer; specifically, an AMD Athlon (not exactly cutting edge, either).

Do I have to set some compiler options or something to make the kernel work on the Pentium? Anything at all I have to do beyond running "make" and letting it go?

I plan on running the "make menuconfig" step on the Pentium before I tar the source up and ftp it to the AMD, if that makes any difference.

I would think all you would have to do is use -march=pentium

You don't really need to run menuconfig on the Pentium, you can just as easily set all the options to match the Pentium from the Athlon. Just set the processor type to Pentium, select all of the appropriate hardware, and go.

If you are building modules as well, make sure you collect all of those before moving the kernel over to the Pentium.

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Thanks for everyone's help. I set the processor type to Pentium, compiled, and moved the kernel and modules over (actually, I tarred the whole thing up, moved it back over, and ran "make modules_install"). Worked like a charm!