- - Remove `options EXEC_ELF32' from the kernel config. You can't just
       build an ELF kernel -- you need to update your toolchain, and then,
       once you go ELF, it's not an option, so it needs to go in std.mac68k,
       as on the other m68k ports.

do ELF executables not work on mac68k a.out kernels?  if they do, then
leaving this option in for now is worth while.

   - - Comment out `options COMPAT_SUNOS'. This hasn't been reported to work
       for a long time, so it's not very useful in GENERIC.

do you mean it has been reported to not work, or there have been no
reports of it being broken?  the latter would suggest removing it is
a bad idea and the former would suggest it needs fixing..