build failure on FreeBSD 9.1

[Kazu Yamamoto ( 山本和彦 )]

> What is the version of your devel/libffi port?

3.0.9.

> Could not adding
> --with-system-libffi and related flags to the configuration phase fix
> the problem?

Yes. When I added --with-system-libffi
--with-ffi-includes=/usr/local/include
--with-ffi-libraries=/usr/local/lib, this problem does not happen.

Summary: building GHC head succeeds both on FreeBSD and Mac. But
installing GHC head fails both on FreeBSD and Mac. This is probably
because no installed scripts define (DY)LD_LIBRARY_PATH.

If --with-system-libffi and etc are specified, both building and
installation succeeds on FreeBSD. "validate" with these options still
freezes:

	http://hackage.haskell.org/trac/ghc/ticket/7652

Note that I set "sudo -w vfs.timestamp_precision=1" on FreeBSD
according to:

	http://hackage.haskell.org/trac/ghc/ticket/7592

--Kazu