From: Erik de Castro Lopo <mle+ocaml@mega-nerd.com>

> Distributing modifications to the compiler in the form of patches is
> a bit of a PITA.

Why? Please remember that you can still distribute binary versions of
the modified software, so the constraint is just there to ensure that
source versions include the full original sources, together with the
modifications. A number of years ago I was doing it for olabl, and
this was not a big problem (the license was even more restrictive
then.)
No, the real problem is that forking is difficult to justify if
you provide only punctual improvements. So you still want the
modifications to go into the trunk, not in a specific forked
version...

Jacques Garrigue