On the one thousand and ninth day rump's mainbus was moved from

rumpdev to rumpkern, liberating all rumpnet users from the need to
-lrumpdev -lrumpvfs just because a loopback interface is mandatory.

Rename rumpdev/autoconf.c to rumpkern/rump_autoconf.c to avoid
accidentally picking up e.g. sys/arch/amd64/amd64/autoconf.c through
make's .PATH.
Move rumpdev/MAINBUS.ioconf to rumpkern.

sys/rump/librump/rumpdev/Makefile.rumpdev

@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile.rumpdev,v 1.12 2015/10/19 16:16:38 pooka Exp $
+#	$NetBSD: Makefile.rumpdev,v 1.13 2019/05/13 17:49:05 bad Exp $
 #
 
 LIB=	rumpdev
@@ -8,13 +8,10 @@ COMMENT=Rump kernel device faction
 	${RUMPTOP}/../kern					\
 	${RUMPTOP}/../dev
 
-IOCONFDIR:=	${.PARSEDIR}
-IOCONF=		MAINBUS.ioconf
-
-SRCS=	rump_dev.c autoconf.c
+SRCS=	rump_dev.c
 
 # sys/kern
-SRCS+=	kern_pmf.c subr_autoconf.c
+SRCS+=	kern_pmf.c
 
 # sys/dev
 SRCS+=	dev_verbose.c

sys/rump/librump/rumpkern/Makefile.rumpkern

@@ -1,9 +1,8 @@
-#	$NetBSD: Makefile.rumpkern,v 1.174 2019/01/27 02:08:49 pgoyette Exp $
+#	$NetBSD: Makefile.rumpkern,v 1.175 2019/05/13 17:49:05 bad Exp $
 #
 
-.include "${RUMPTOP}/Makefile.rump"
-
-.include <bsd.own.mk>
+IOCONFDIR:=	${.PARSEDIR}
+IOCONF=		MAINBUS.ioconf
 
 LIB=		rump
 COMMENT=	Rump kernel base
@@ -31,7 +30,7 @@ SRCS+=	rump.c rumpcopy.c cons.c emul.c etfs_wrap.c intr.c	\
 	signals.c sleepq.c threads.c vm.c hyperentropy.c	\
 	accessors.c
 
-SRCS+=	rumpkern_syscalls.c
+SRCS+=	rump_autoconf.c rumpkern_syscalls.c
 
 # autogenerated into the correct namespace
 RUMPOBJ_NORENAME= rump_syscalls.o rump_syscalls.pico rump_syscalls.po
@@ -99,6 +98,7 @@ SRCS+=	init_sysctl_base.c	\
 	kern_timeout.c		\
 	kern_uidinfo.c		\
 	param.c			\
+	subr_autoconf.c		\
 	subr_callback.c		\
 	subr_copy.c		\
 	subr_cprng.c		\
@@ -160,6 +160,9 @@ SRCS+=	rijndael-api-fst.c
 SRCS+=	rijndael.c
 SRCS+=	cprng_fast.c
 
+.include "${RUMPTOP}/Makefile.rump"
+.include <bsd.own.mk>
+
 # compat
 .if !empty(RUMP_NBCOMPAT:M50)
 SRCS+=	kern_select_50.c

sys/rump/librump/rumpkern/rump_autoconf.c

@@ -1,4 +1,4 @@
-/*	$NetBSD: autoconf.c,v 1.9 2016/01/26 23:12:17 pooka Exp $	*/
+/*	$NetBSD: rump_autoconf.c,v 1.1 2019/05/13 17:49:05 bad Exp $	*/
 
 /*
  * Copyright (c) 2009 Antti Kantee.  All Rights Reserved.
@@ -26,7 +26,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.9 2016/01/26 23:12:17 pooka Exp $");
+__KERNEL_RCSID(0, "$NetBSD: rump_autoconf.c,v 1.1 2019/05/13 17:49:05 bad Exp $");
 
 #include <sys/param.h>
 #include <sys/device.h>