[MLton] Intel Mac version of MLton

[Stephen Weeks]

John Reppy has an Intel Mac and has volunteered to try building a
MLton package, if we can walk him through it.

John, some instructions on porting MLton are at

  http://mlton.org/PortingMLton

You can skip the "What code to change" and move straight to "Running
the regressions ..." followed by "Bootstrap".

Here's an overview of the steps.

  1. Create a cross compiler using bin/add-cross.
  2. Check that the cross compiler works.
  3. Cross compile MLton.
  4. Compile MLton normally on the target, i.e. "make all install".
  5. Make a tgz of the install directory.

Don't start just yet.  Matthew has one more commit to make, which he
will make soon and let you know once he has done so.

Feel free to send questions to MLton at mlton.org.