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