For some reason both openbox 3.5.0-r1 and 3.5.0_p20111019 have WANT_AUTOMAKE=1.9 First tarball was made with automake 1.11.1, second seems to be a repo checkout, (no autotools generated files inside), so again 1.11 should be OK.
agreed. WANT_AUTOMAKE is gone. We will use the latest by default