The following FreeBSD ports and packages may be useful:
	databases/db		Berkeley DB2
	databases/gdbm		GNU Database Manager
	devel/autoconf		GNU Autoconf
	devel/libtool		GNU Autoconf
	devel/gdb		GNU Debugger
	lang/egcs		EGCS enhanced GNU C Suite
	security/tcp_wrappers	TCP Wrappers

FreeBSD 3.0
	no special options

FreeBSD 2.2.5 (and prior?)
	requires --without-yielding-select or --without-threads