Ocaml or Unison port working for anyone?

[Francisco Reyes]

Tried to compile unison.. failed on Ocaml-nox11 with an error that it 
doesn't compile in i386.

Anyone has been able to get either of those compiled by hand insted of 
port?

Also my guess the error probably meant to read that it only works in i386.

Why do some ports require i386? Instructions not supported by gcc in 
AMD64?

Is there anywhere a list of ports that don't work on AMD64?