486/Pentium version problems

[Edmund GRIMLEY EVANS]

Following the instructions at os.inf.tu-dresden.de/fiasco/use.html I
built Fiasco and the Hello World server worked. Excellent!

Then I tried building L4-Linux and it didn't work ...

Then I noticed that grub-ext2fs-floppy apparently already contains
everything you need to run L4-Linux except for L4 itself. So I just
copied the fiasco "main" that I had built onto the floppy image as
supplied, hacked menu.lst a bit at random, and tried that.

That didn't work either, but the thing that caught my attention was a
message something like this:

RMGR: L4/Pentium ...

I was running this on a 486.

So my questions are:

Do the same executables (main, rmgr, sigma0, glinux.gz) run on both 486
and Pentium, or do different versions have to be built? If the latter,
are the versions in grub-ext2fs-floppy supposed to work only on
Pentium? If so, how can I build a version for 486 when compiling on a
686 machine? (And also, could the code be made to run on both? It would
make life easier ...)

Edmund