The autoconf stuff is all in a subdirectory, which is rather annoying
as OE expects patches to be applied and autoconf stuff to be done in
S. This adds enough autoconf at the top level to allow it to be
called there - all it does is run a sub autoconf stuff in the src
directory.

Index: rp-pppoe-3.8/Makefile.am
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ rp-pppoe-3.8/Makefile.am	2007-06-08 15:58:16.000000000 +1000
@@ -0,0 +1,5 @@
+PACKAGE = rp-pppoe
+VERSION = 3.8
+
+dnl AM_CFLAGS = -Wall -DDEBUG
+SUBDIRS = src
Index: rp-pppoe-3.8/configure.in
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ rp-pppoe-3.8/configure.in	2007-06-08 15:58:16.000000000 +1000
@@ -0,0 +1,4 @@
+AC_INIT(src/pppoe.c)
+AM_INIT_AUTOMAKE([rp-pppoe], [3.8])
+AC_CONFIG_SUBDIRS(src)
+AC_OUTPUT(Makefile)