The INSTALL in rpc2 lists old auto* versions.

I had to use gmake (NetBSD's make failed; there must be a gmakism
somewhere).  So INSTALL should note that gmake is required, too.

I successfully built with the following versions:

autoconf (GNU Autoconf) 2.59
Written by David J. MacKenzie and Akim Demaille.

Copyright (C) 2003 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
automake (GNU automake) 1.8
Written by Tom Tromey <tromey_at_redhat.com>.

Copyright 2003 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
ltmain.sh (GNU libtool) 1.5.2 (1.1220.2.60 2004/01/25 12:25:08)

Copyright (C) 2003  Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

GNU Make 3.80
Copyright (C) 2002  Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.