Update dirdeps.mk et al to latest

Move some local tweaks to local.*.mk

Reviewed by:	bdrewery
MFC after:	1 week
Differential Revision: https://reviews.freebsd.org/D27300

15 files changed, 343 insertions, 205 deletions

diff --git a/share/mk/bsd.init.mk b/share/mk/bsd.init.mk
index 5cd435953bef..30eeb0b2a15b 100644
--- a/share/mk/bsd.init.mk
+++ b/share/mk/bsd.init.mk
@@ -55,9 +55,13 @@ $xGRP=	${_gid}
 # - make install is used without other targets.  This is to avoid breaking
 #   things like 'make all install' or 'make foo install'.
 # - non-build targets are called
-.if ${MK_DIRDEPS_BUILD} == "yes" && ${.MAKE.LEVEL:U1} == 0 && \
-    ${BUILD_AT_LEVEL0:Uyes:tl} == "no" && !make(clean*) && !make(*clean)
+.if ${MK_DIRDEPS_BUILD} == "yes" && ${.MAKE.LEVEL} == 0
+# targets that are ok at level 0
+DIRDEPS_BUILD_LEVEL0_TARGETS += clean* destroy*
+M_ListToSkip?= O:u:S,^,N,:ts:
+.if ${.TARGETS:Uall:${DIRDEPS_BUILD_LEVEL0_TARGETS:${M_ListToSkip}}} != ""
 _SKIP_BUILD=	not building at level 0
+.endif
 .elif !empty(.MAKEFLAGS:M-V${_V_DO_BUILD}) || \
     ${.TARGETS:M*install*} == ${.TARGETS} || \
     ${.TARGETS:Mclean*} == ${.TARGETS} || \
diff --git a/share/mk/dirdeps-options.mk b/share/mk/dirdeps-options.mk
index d177900845a7..c59a5600923e 100644
--- a/share/mk/dirdeps-options.mk
+++ b/share/mk/dirdeps-options.mk
@@ -1,7 +1,7 @@
 # $FreeBSD$
-# $Id: dirdeps-options.mk,v 1.9 2018/09/20 00:07:19 sjg Exp $
+# $Id: dirdeps-options.mk,v 1.17 2020/08/07 01:57:38 sjg Exp $
 #
-#	@(#) Copyright (c) 2018, Simon J. Gerraty
+#	@(#) Copyright (c) 2018-2020, Simon J. Gerraty
 #
 #	This file is provided in the hope that it will
 #	be of use.  There is absolutely NO WARRANTY.
@@ -38,6 +38,11 @@
 # to whatever applies for that dir, or it can rely on globals
 # set in local.dirdeps-options.mk
 # Either way, we will .undef DIRDEPS.* when done.
+#
+# In some cases the value of MK_FOO might depend on TARGET_SPEC
+# so we qualify MK_FOO with .${TARGET_SPEC} and each component
+# TARGET_SPEC_VAR (in reverse order) before using MK_FOO.
+#
 
 # This should have been set by Makefile.depend.options
 # before including us
@@ -48,21 +53,43 @@ DIRDEPS_OPTIONS ?=
 
 .if ${.MAKE.LEVEL} == 0
 # :U below avoids potential errors when we :=
-.for o in ${DIRDEPS_OPTIONS:tu}
-DIRDEPS += ${DIRDEPS.$o.${MK_$o:U}:U}
+# some options can depend on TARGET_SPEC!
+DIRDEPS_OPTIONS_QUALIFIER_LIST ?= \
+	${DEP_TARGET_SPEC:U${TARGET_SPEC}} \
+	${TARGET_SPEC_VARSr:U${TARGET_SPEC_VARS}:@v@${DEP_$v:U${$v}}@}
+# note that we need to include $o in the variable _o$o
+# to ensure correct evaluation.
+.for o in ${DIRDEPS_OPTIONS}
+.undef _o$o _v$o
+.for x in ${DIRDEPS_OPTIONS_QUALIFIER_LIST}
+.if defined(MK_$o.$x)
+_o$o ?= MK_$o.$x
+_v$o ?= ${MK_$o.$x}
+.endif
+.endfor
+_v$o ?= ${MK_$o}
+.if ${_debug_reldir:U0}
+.info ${DEP_RELDIR:U${RELDIR}}.${DEP_TARGET_SPEC:U${TARGET_SPEC}}: o=$o ${_o$o:UMK_$o}=${_v$o:U} DIRDEPS += ${DIRDEPS.$o.${_v$o:U}:U}
+.endif
+DIRDEPS += ${DIRDEPS.$o.${_v$o:U}:U}
 .endfor
 DIRDEPS := ${DIRDEPS:O:u}
+.if ${_debug_reldir:U0}
+.info ${DEP_RELDIR:U${RELDIR}}: DIRDEPS=${DIRDEPS}
+.endif
 # avoid cross contamination
-.for o in ${DIRDEPS_OPTIONS:tu}
+.for o in ${DIRDEPS_OPTIONS}
 .undef DIRDEPS.$o.yes
 .undef DIRDEPS.$o.no
+.undef _o$o
+.undef _v$o
 .endfor
 .else
 # whether options are enabled or not,
 # we want to filter out the relevant DIRDEPS.*
 # we should only be included by meta.autodep.mk
 # if dependencies are to be updated
-.for o in ${DIRDEPS_OPTIONS:tu}
+.for o in ${DIRDEPS_OPTIONS}
 .for d in ${DIRDEPS.$o.yes} ${DIRDEPS.$o.no}
 .if exists(${SRCTOP}/$d)
 GENDIRDEPS_FILTER += N$d*
diff --git a/share/mk/dirdeps-targets.mk b/share/mk/dirdeps-targets.mk
index 179c38b53fff..e65ad89742bd 100644
--- a/share/mk/dirdeps-targets.mk
+++ b/share/mk/dirdeps-targets.mk
@@ -1,16 +1,16 @@
 # $FreeBSD$
 # RCSid:
-#       $Id: dirdeps-targets.mk,v 1.9 2019/10/06 20:07:50 sjg Exp $
+#       $Id: dirdeps-targets.mk,v 1.22 2020/08/15 18:00:11 sjg Exp $
 #
-#       @(#) Copyright (c) 2019 Simon J. Gerraty
+#       @(#) Copyright (c) 2019-2020 Simon J. Gerraty
 #
 #       This file is provided in the hope that it will
 #       be of use.  There is absolutely NO WARRANTY.
 #       Permission to copy, redistribute or otherwise
-#       use this file is hereby granted provided that 
+#       use this file is hereby granted provided that
 #       the above copyright notice and this notice are
-#       left intact. 
-#      
+#       left intact.
+#
 #       Please send copies of changes and bug-fixes to:
 #       sjg@crufty.net
 #
@@ -26,7 +26,16 @@
 # We then search those dirs for any Makefile.depend*
 # Finally we select any that match conditions like REQUESTED_MACHINE
 # or TARGET_SPEC and initialize DIRDEPS accordingly.
-# 
+#
+# We will check each of the initial DIRDEPS for Makefile.dirdeps.options
+# and include any found.
+# This makes it feasible to tweak options like MK_DIRDEPS_CACHE
+# for a specific target.
+#
+# If MK_STATIC_DIRDEPS_CACHE is defined we will check if the
+# initial DIRDEPS has a static cache (Makefile.dirdeps.cache).
+# This only makes sense for seriously expensive targets.
+#
 
 .if ${.MAKE.LEVEL} == 0
 # pickup customizations
@@ -38,8 +47,11 @@ DIRDEPS_TARGETS_DIRS ?= targets targets/pseudo
 # they need to be stripped when looking for target dirs
 DIRDEPS_TARGETS_PREFIX_LIST ?= pkg- build-
 
+# some .TARGETS need filtering
+DIRDEPS_TARGETS_FILTER += Nall
+
 # matching target dirs if any
-tdirs := ${.TARGETS:Nall:${DIRDEPS_TARGETS_PREFIX_LIST:@p@S,^$p,,@:ts:}:@t@${DIRDEPS_TARGETS_DIRS:@d@$d/$t@}@:@d@${exists(${SRCTOP}/$d):?$d:}@}
+tdirs := ${.TARGETS:${DIRDEPS_TARGETS_FILTER:ts:}:${DIRDEPS_TARGETS_PREFIX_LIST:@p@S,^$p,,@:ts:}:@t@${DIRDEPS_TARGETS_DIRS:@d@$d/$t@}@:@d@${exists(${SRCTOP}/$d):?$d:}@}
 
 .if !empty(DEBUG_DIRDEPS_TARGETS)
 .info tdirs=${tdirs}
@@ -123,12 +135,38 @@ DIRDEPS := ${DIRDEPS:O:u}
 .endif
 # if we got DIRDEPS get to work
 .if !empty(DIRDEPS)
+DIRDEPS.dirs := ${DIRDEPS:S,^,${SRCTOP}/,:@d@${exists($d):?$d:${d:R}}@}
+# some targets what to tweak options we might want to process now
+.for m in ${DIRDEPS.dirs:S,$,/Makefile.dirdeps.options,}
+.-include <$m>
+.endfor
+.if defined(MK_STATIC_DIRDEPS_CACHE)
+# some targets are very expensive to compute dirdeps for
+# so we may have a static cache
+.for c in ${DIRDEPS.dirs:S,$,/Makefile.dirdeps.cache,}
+.if exists($c)
+STATIC_DIRDEPS_CACHE ?= $c
+.if ${MK_STATIC_DIRDEPS_CACHE} == "yes"
+DIRDEPS_CACHE ?= $c
+MK_DIRDEPS_CACHE = yes
+.endif
+.endif
+.endfor
+.if defined(STATIC_DIRDEPS_CACHE)
+.export STATIC_DIRDEPS_CACHE
+.endif
+.endif
+
+# allow a top-level makefile to do other stuff
+# before including dirdeps.mk
+.if ${MK_DIRDEPS_TARGETS_INCLUDE_DIRDEPS:Uyes} == "yes"
 .include <dirdeps.mk>
+.endif
 
 DIRDEPS_TARGETS_SKIP += all clean* destroy*
 
 .for t in ${.TARGETS:${DIRDEPS_TARGETS_SKIP:${M_ListToSkip}}}
 $t: dirdeps
-.endfor                                                                         
+.endfor
 .endif
 .endif
diff --git a/share/mk/dirdeps.mk b/share/mk/dirdeps.mk
index 68ddd2155647..c7842b49d16b 100644
--- a/share/mk/dirdeps.mk
+++ b/share/mk/dirdeps.mk
@@ -1,7 +1,8 @@
 # $FreeBSD$
-# $Id: dirdeps.mk,v 1.100 2019/11/12 06:47:58 sjg Exp $
+# $Id: dirdeps.mk,v 1.130 2020/11/02 00:34:30 sjg Exp $
 
-# Copyright (c) 2010-2013, Juniper Networks, Inc.
+# Copyright (c) 2010-2020, Simon J. Gerraty
+# Copyright (c) 2010-2018, Juniper Networks, Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -41,7 +42,7 @@
 #	or .<target_spec> suffix (see TARGET_SPEC_VARS below),
 #	for example to force building something for the pseudo
 #	machines "host" or "common" regardless of current ${MACHINE}.
-#	
+#
 #	All unqualified entries end up being qualified with .${TARGET_SPEC}
 #	and partially qualified (if TARGET_SPEC_VARS has multiple
 #	entries) are also expanded to a full .<target_spec>.
@@ -50,29 +51,22 @@
 #
 #	The fully qualified directory entries are used to construct a
 #	dependency graph that will drive the build later.
-#	
+#
 #	Also, for each fully qualified directory target, we will search
 #	using ${.MAKE.DEPENDFILE_PREFERENCE} to find additional
 #	dependencies.  We use Makefile.depend (default value for
 #	.MAKE.DEPENDFILE_PREFIX) to refer to these makefiles to
 #	distinguish them from others.
-#	
+#
 #	Before each Makefile.depend file is read, we set
 #	DEP_RELDIR to be the RELDIR (path relative to SRCTOP) for
 #	its directory, and DEP_MACHINE etc according to the .<target_spec>
 #	represented by the suffix of the corresponding target.
-#	
+#
 #	Since each Makefile.depend file includes dirdeps.mk, this
 #	processing is recursive and results in .MAKE.LEVEL 0 learning the
 #	dependencies of the tree wrt the initial directory (_DEP_RELDIR).
 #
-# BUILD_AT_LEVEL0
-#	Indicates whether .MAKE.LEVEL 0 builds anything:
-#	if "no" sub-makes are used to build everything,
-#	if "yes" sub-makes are only used to build for other machines.
-#	It is best to use "no", but this can require fixing some
-#	makefiles to not do anything at .MAKE.LEVEL 0.
-#
 # TARGET_SPEC_VARS
 #	The default value is just MACHINE, and for most environments
 #	this is sufficient.  The _DIRDEP_USE target actually sets
@@ -113,12 +107,12 @@
 #		# make sure we know what TARGET_SPEC is
 #		# as we may need it to find Makefile.depend*
 #		TARGET_SPEC = ${TARGET_SPEC_VARS:@v@${$v:U}@:ts,}
-#	
+#
 #	The following variables can influence the initial DIRDEPS
 #	computation with regard to the TARGET_SPECs that will be
 #	built.
 #	Most should also be considered by init.mk
-#	
+#
 #	ONLY_TARGET_SPEC_LIST
 #		Defines a list of TARGET_SPECs for which the current
 #		directory can be built.
@@ -137,6 +131,19 @@
 #		A list of MACHINEs the current directory should not be
 #		built for.
 #
+# _build_xtra_dirs
+#	local.dirdeps.mk can add targets to this variable.
+#	They will be hooked into the build, but independent of
+#	any other DIRDEP.
+#
+#	This allows for adding TESTS to the build, such that the build
+#	if any test fails, but without the risk of introducing
+#	circular dependencies.
+
+now_utc ?= ${%s:L:gmtime}
+.if !defined(start_utc)
+start_utc := ${now_utc}
+.endif
 
 .if !target(bootstrap) && (make(bootstrap) || \
 	make(bootstrap-this) || \
@@ -157,11 +164,6 @@ _DIRDEP_USE_LEVEL?= 0
 _CURDIR ?= ${.CURDIR}
 _OBJDIR ?= ${.OBJDIR}
 
-now_utc = ${%s:L:gmtime}
-.if !defined(start_utc)
-start_utc := ${now_utc}
-.endif
-
 .if ${MAKEFILE:T} == ${.PARSEFILE} && empty(DIRDEPS) && ${.TARGETS:Uall:M*/*} != ""
 # This little trick let's us do
 #
@@ -208,12 +210,9 @@ DEP_$v ?= ${$v}
 # so we need to construct a set of modifiers to fill in the gaps.
 .if ${MAKE_VERSION} >= 20170130
 _tspec_x := ${TARGET_SPEC_VARS:range}
-.elif ${TARGET_SPEC_VARS:[#]} > 10
-# seriously? better have jot(1) or equivalent to produce suitable sequence
-_tspec_x := ${${JOT:Ujot} ${TARGET_SPEC_VARS:[#]}:L:sh}
 .else
-# we can provide the sequence ourselves
-_tspec_x := ${1 2 3 4 5 6 7 8 9 10:L:[1..${TARGET_SPEC_VARS:[#]}]}
+# do it the hard way
+_tspec_x := ${TARGET_SPEC_VARS:[#]:@x@i=1;while [ $$i -le $x ]; do echo $$i; i=$$((i + 1)); done;@:sh}
 .endif
 # this handles unqualified entries
 M_dep_qual_fixes = C;(/[^/.,]+)$$;\1.$${DEP_TARGET_SPEC};
@@ -223,6 +222,7 @@ _tspec_m$i := ${TARGET_SPEC_VARS:[2..$i]:@w@[^,]+@:ts,}
 _tspec_a$i := ,${TARGET_SPEC_VARS:[$i..-1]:@v@$$$${DEP_$v}@:ts,}
 M_dep_qual_fixes += C;(\.${_tspec_m$i})$$;\1${_tspec_a$i};
 .endfor
+TARGET_SPEC_VARSr := ${TARGET_SPEC_VARS:[-1..1]}
 .else
 # A harmless? default.
 M_dep_qual_fixes = U
@@ -307,6 +307,7 @@ DEP_MACHINE := ${_DEP_TARGET_SPEC}
 
 # reset each time through
 _build_all_dirs =
+_build_xtra_dirs =
 
 # the first time we are included the _DIRDEP_USE target will not be defined
 # we can use this as a clue to do initialization and other one time things.
@@ -337,7 +338,18 @@ BUILD_DIRDEPS ?= yes
 
 .if ${MK_DIRDEPS_CACHE} == "yes"
 # this is where we will cache all our work
-DIRDEPS_CACHE ?= ${_OBJDIR:tA}/dirdeps.cache${.TARGETS:Nall:O:u:ts-:S,/,_,g:S,^,.,:N.}
+DIRDEPS_CACHE ?= ${_OBJDIR:tA}/dirdeps.cache${_TARGETS:U${.TARGETS}:Nall:O:u:ts-:S,/,_,g:S,^,.,:N.}
+.endif
+
+.if ${DEBUG_DIRDEPS:@x@${DEP_RELDIR:M$x}${${DEP_RELDIR}.${DEP_MACHINE}:L:M$x}@} != ""
+_debug_reldir = 1
+.else
+_debug_reldir = 0
+.endif
+.if ${DEBUG_DIRDEPS:@x@${DEP_RELDIR:M$x}${${DEP_RELDIR}.depend:L:M$x}@} != ""
+_debug_search = 1
+.else
+_debug_search = 0
 .endif
 
 # pickup customizations
@@ -382,6 +394,18 @@ DIRDEPS_FILTER += M${_DEP_RELDIR}
 DIRDEP_MAKE ?= ${.MAKE}
 DIRDEP_DIR ?= ${.TARGET:R}
 
+# if you want us to report load averages during build
+# DIRDEP_USE_PRELUDE += ${DIRDEP_LOADAVG_REPORT};
+
+DIRDEP_LOADAVG_CMD ?= ${UPTIME:Uuptime} | sed 's,.*\(load\),\1,'
+DIRDEP_LOADAVG_LAST = 0
+# yes the expression here is a bit complicated,
+# the trick is to only eval ${DIRDEP_LOADAVG_LAST::=${now_utc}}
+# when we want to report.
+DIRDEP_LOADAVG_REPORT = \
+	test -z "${"${expr ${now_utc} - ${DIRDEP_LOADAVG_INTEVAL:U60} - ${DIRDEP_LOADAVG_LAST}:L:sh:N-*}":?yes${DIRDEP_LOADAVG_LAST::=${now_utc}}:}" || \
+	echo "${TRACER}`${DIRDEP_LOADAVG_CMD}`"
+
 # we suppress SUBDIR when visiting the leaves
 # we assume sys.mk will set MACHINE_ARCH
 # you can add extras to DIRDEP_USE_ENV
@@ -389,7 +413,7 @@ DIRDEP_DIR ?= ${.TARGET:R}
 _DIRDEP_USE:	.USE .MAKE
 	@for m in ${.MAKE.MAKEFILE_PREFERENCE}; do \
 		test -s ${.TARGET:R}/$$m || continue; \
-		echo "${TRACER}Checking ${.TARGET:R} for ${.TARGET:E} ..."; \
+		echo "${TRACER}Checking ${.TARGET:S,${SRCTOP}/,,} for ${.TARGET:E} ..."; \
 		${DIRDEP_USE_PRELUDE} \
 		MACHINE_ARCH= NO_SUBDIR=1 ${DIRDEP_USE_ENV} \
 		TARGET_SPEC=${.TARGET:E} \
@@ -468,10 +492,19 @@ dirdeps-cached:	${DIRDEPS_CACHE} .MAKE
 	@MAKELEVEL=${.MAKE.LEVEL} ${.MAKE} -C ${_CURDIR} -f ${DIRDEPS_CACHE} \
 		dirdeps MK_DIRDEPS_CACHE=no BUILD_DIRDEPS=no
 
+# leaf makefiles rarely work for building DIRDEPS_CACHE
+.if ${RELDIR} != "."
+BUILD_DIRDEPS_MAKEFILE ?= -f dirdeps.mk
+.endif
+
 # these should generally do
-BUILD_DIRDEPS_MAKEFILE ?= ${MAKEFILE}
+BUILD_DIRDEPS_MAKEFILE ?=
 BUILD_DIRDEPS_TARGETS ?= ${.TARGETS}
 
+.if ${DIRDEPS_CACHE} != ${STATIC_DIRDEPS_CACHE:Uno} && ${DIRDEPS_CACHE:M${SRCTOP}/*} == ""
+# export this for dirdeps-cache-update.mk
+DYNAMIC_DIRDEPS_CACHE := ${DIRDEPS_CACHE}
+.export DYNAMIC_DIRDEPS_CACHE
 # we need the .meta file to ensure we update if
 # any of the Makefile.depend* changed.
 # We do not want to compare the command line though.
@@ -483,40 +516,34 @@ ${DIRDEPS_CACHE}:	.META .NOMETA_CMP
 	+@MAKELEVEL=${.MAKE.LEVEL} DIRDEPS_CACHE=${DIRDEPS_CACHE} \
 	DIRDEPS="${DIRDEPS}" \
 	TARGET_SPEC=${TARGET_SPEC} \
-	MAKEFLAGS= ${.MAKE} -C ${_CURDIR} -f ${BUILD_DIRDEPS_MAKEFILE} \
+	MAKEFLAGS= ${DIRDEP_CACHE_MAKE:U${.MAKE}} -C ${_CURDIR} \
+	${BUILD_DIRDEPS_MAKEFILE} \
 	${BUILD_DIRDEPS_TARGETS} BUILD_DIRDEPS_CACHE=yes \
 	.MAKE.DEPENDFILE=.none \
+	${"${DEBUG_DIRDEPS:Nno}":?DEBUG_DIRDEPS='${DEBUG_DIRDEPS}':} \
 	${.MAKEFLAGS:tW:S,-D ,-D,g:tw:M*WITH*} \
-	3>&1 1>&2 | sed 's,${SRCTOP},$${SRCTOP},g' >> ${.TARGET}.new && \
+	${.MAKEFLAGS:tW:S,-d ,-d,g:tw:M-d*} \
+	3>&1 1>&2 | sed 's,${SRCTOP},$${SRCTOP},g;s,_{,$${,g' >> ${.TARGET}.new && \
 	mv ${.TARGET}.new ${.TARGET}
 
 .endif
+.endif
 .elif !target(_count_dirdeps)
 # we want to capture the dirdeps count in the cache
 .END: _count_dirdeps
 _count_dirdeps: .NOMETA
-	@echo '.info $${.newline}$${TRACER}Makefiles read: total=${.MAKE.MAKEFILES:[#]} depend=${.MAKE.MAKEFILES:M*depend*:[#]} dirdeps=${.ALLTARGETS:M${SRCTOP}*:O:u:[#]}' >&3
+	@{ echo; echo '.info $${.newline}$${TRACER}Makefiles read: total=${.MAKE.MAKEFILES:[#]} depend=${.MAKE.MAKEFILES:M*depend*:[#]} dirdeps=${.ALLTARGETS:M${SRCTOP}*:O:u:[#]} ${DIRDEP_INFO_XTRAS}'; } >&3
 
 .endif
 .elif !make(dirdeps) && !target(_count_dirdeps)
 beforedirdeps: _count_dirdeps
 _count_dirdeps: .NOMETA
-	@echo "${TRACER}Makefiles read: total=${.MAKE.MAKEFILES:[#]} depend=${.MAKE.MAKEFILES:M*depend*:[#]} dirdeps=${.ALLTARGETS:M${SRCTOP}*:O:u:[#]} seconds=`expr ${now_utc} - ${start_utc}`"
+	@echo "${TRACER}Makefiles read: total=${.MAKE.MAKEFILES:[#]} depend=${.MAKE.MAKEFILES:M*depend*:[#]} dirdeps=${.ALLTARGETS:M${SRCTOP}*:O:u:[#]} ${DIRDEP_INFO_XTRAS} seconds=`expr ${now_utc} - ${start_utc}`"
 
 .endif
 .endif
 
 .if ${BUILD_DIRDEPS} == "yes"
-.if ${DEBUG_DIRDEPS:@x@${DEP_RELDIR:M$x}${${DEP_RELDIR}.${DEP_MACHINE}:L:M$x}@} != ""
-_debug_reldir = 1
-.else
-_debug_reldir = 0
-.endif
-.if ${DEBUG_DIRDEPS:@x@${DEP_RELDIR:M$x}${${DEP_RELDIR}.depend:L:M$x}@} != ""
-_debug_search = 1
-.else
-_debug_search = 0
-.endif
 
 # the rest is done repeatedly for every Makefile.depend we read.
 # if we are anything but the original dir we care only about the
@@ -568,19 +595,7 @@ _build_dirs =
 
 .if ${DEP_RELDIR} == ${_DEP_RELDIR}
 # pickup other machines for this dir if necessary
-.if ${BUILD_AT_LEVEL0:Uyes} == "no"
 _build_dirs += ${_machines:@m@${_CURDIR}.$m@}
-.else
-_build_dirs += ${_machines:N${DEP_TARGET_SPEC}:@m@${_CURDIR}.$m@}
-.if ${DEP_TARGET_SPEC} == ${TARGET_SPEC}
-# pickup local dependencies now
-.if ${MAKE_VERSION} < 20160220
-.-include <.depend>
-.else
-.dinclude <.depend>
-.endif
-.endif
-.endif
 .endif
 
 .if ${_debug_reldir}
@@ -616,6 +631,7 @@ __qual_depdirs += ${__hostdpadd}
 .endif
 
 .if ${_debug_reldir}
+.info DEP_DIRDEPS_FILTER=${DEP_DIRDEPS_FILTER:ts:}
 .info depdirs=${__depdirs}
 .info qualified=${__qual_depdirs}
 .info unqualified=${__unqual_depdirs}
@@ -633,7 +649,7 @@ _build_dirs := ${_build_dirs:${M_dep_qual_fixes:ts:}:O:u}
 
 .endif				# empty DIRDEPS
 
-_build_all_dirs += ${_build_dirs}
+_build_all_dirs += ${_build_dirs} ${_build_xtra_dirs}
 _build_all_dirs := ${_build_all_dirs:O:u}
 
 # Normally if doing make -V something,
@@ -642,19 +658,14 @@ _build_all_dirs := ${_build_all_dirs:O:u}
 .if ${.MAKEFLAGS:M-V${_V_READ_DIRDEPS}} == ""
 .if !empty(_build_all_dirs)
 .if ${BUILD_DIRDEPS_CACHE} == "yes"
-# guard against _build_all_dirs being too big for a single command line
-# first get list of dirs that need _DIRDEP_USE
-# then export that and _build_all_dirs
+x!= echo; { echo; echo '\# ${DEP_RELDIR}.${DEP_TARGET_SPEC}'; } >&3
+# guard against _new_dirdeps being too big for a single command line
 _new_dirdeps := ${_build_all_dirs:@x@${target($x):?:$x}@}
-.export _new_dirdeps _build_all_dirs
-x!= echo; { echo '\# ${DEP_RELDIR}.${DEP_TARGET_SPEC}'; \
-	echo "dirdeps: \\"; \
-	for x in $$_build_all_dirs; do echo "	$$x \\"; done; echo; \
-	for x in $$_new_dirdeps; do echo "$$x: _DIRDEP_USE"; done; echo; } >&3
+.export _build_xtra_dirs _new_dirdeps
 .if !empty(DEP_EXPORT_VARS)
 # Discouraged, but there are always exceptions.
 # Handle it here rather than explain how.
-x!= { echo; ${DEP_EXPORT_VARS:@v@echo '$v=${$v}';@} echo '.export ${DEP_EXPORT_VARS}'; echo; } >&3; echo
+x!= echo; { echo; ${DEP_EXPORT_VARS:@v@echo '$v=${$v}';@} echo '.export ${DEP_EXPORT_VARS}'; echo; } >&3
 .endif
 .else
 # this makes it all happen
@@ -673,6 +684,10 @@ DEP_EXPORT_VARS=
 
 # this builds the dependency graph
 .for m in ${_machines}
+.if ${BUILD_DIRDEPS_CACHE} == "yes" && !empty(_build_dirs)
+x!= echo; { echo; echo 'DIRDEPS.${_this_dir}.$m = \'; } >&3
+_cache_deps =
+.endif
 # it would be nice to do :N${.TARGET}
 .if !empty(__qual_depdirs)
 .for q in ${__qual_depdirs:${M_dep_qual_fixes:ts:}:E:O:u:N$m}
@@ -680,10 +695,7 @@ DEP_EXPORT_VARS=
 .info ${DEP_RELDIR}.$m: graph: ${_build_dirs:M*.$q}
 .endif
 .if ${BUILD_DIRDEPS_CACHE} == "yes"
-_cache_deps := ${_build_dirs:M*.$q}
-.export _cache_deps
-x!= echo; { echo "${_this_dir}.$m: \\"; \
-	for x in $$_cache_deps; do echo "	$$x \\"; done; echo; } >&3
+_cache_deps += ${_build_dirs:M*.$q}
 .else
 ${_this_dir}.$m: ${_build_dirs:M*.$q}
 .endif
@@ -693,10 +705,17 @@ ${_this_dir}.$m: ${_build_dirs:M*.$q}
 .info ${DEP_RELDIR}.$m: graph: ${_build_dirs:M*.$m:N${_this_dir}.$m}
 .endif
 .if ${BUILD_DIRDEPS_CACHE} == "yes"
-_cache_deps := ${_build_dirs:M*.$m:N${_this_dir}.$m}
+.if !empty(_build_dirs)
+_cache_deps += ${_build_dirs:M*.$m:N${_this_dir}.$m}
+.if !empty(_cache_deps)
 .export _cache_deps
-x!= echo; { echo "${_this_dir}.$m: \\"; \
-	for x in $$_cache_deps; do echo "       $$x \\"; done; echo; } >&3
+x!= echo; for x in $$_cache_deps; do echo "	$$x \\"; done >&3
+.endif
+x!= echo; { echo; echo '${_this_dir}.$m: $${DIRDEPS.${_this_dir}.$m}'; \
+	echo; echo 'dirdeps: ${_this_dir}.$m \'; \
+	for x in $$_build_xtra_dirs; do echo "	$$x \\"; done; \
+	echo; for x in $$_new_dirdeps; do echo "$$x: _DIRDEP_USE"; done; } >&3
+.endif
 .else
 ${_this_dir}.$m: ${_build_dirs:M*.$m:N${_this_dir}.$m}
 .endif
@@ -766,6 +785,27 @@ _DEP_RELDIR := ${RELDIR}
 # This is a final opportunity to add/hook global rules.
 .-include <local.dirdeps-build.mk>
 
+# skip _reldir_{finish,failed} if not included from Makefile.depend*
+# or not in meta mode
+.if !defined(WITHOUT_META_STATS) && ${.INCLUDEDFROMFILE:U:M${.MAKE.DEPENDFILE_PREFIX}*} != "" && ${.MAKE.MODE:Mmeta} != ""
+
+meta_stats= meta=${empty(.MAKE.META.FILES):?0:${.MAKE.META.FILES:[#]}} \
+	created=${empty(.MAKE.META.CREATED):?0:${.MAKE.META.CREATED:[#]}}
+
+.if !target(_reldir_finish)
+.END: _reldir_finish
+_reldir_finish: .NOMETA
+	@echo "${TRACER}Finished ${RELDIR}.${TARGET_SPEC} seconds=$$(( ${now_utc} - ${start_utc} )) ${meta_stats}"
+.endif
+
+.if !target(_reldir_failed)
+.ERROR: _reldir_failed
+_reldir_failed: .NOMETA
+	@echo "${TRACER}Failed ${RELDIR}.${TARGET_SPEC} seconds=$$(( ${now_utc} - ${start_utc} )) ${meta_stats}"
+.endif
+
+.endif
+
 # pickup local dependencies
 .if ${MAKE_VERSION} < 20160220
 .-include <.depend>
diff --git a/share/mk/gendirdeps.mk b/share/mk/gendirdeps.mk
index 96681fc7d9d3..6d26b3d308b1 100644
--- a/share/mk/gendirdeps.mk
+++ b/share/mk/gendirdeps.mk
@@ -1,18 +1,19 @@
 # $FreeBSD$
-# $Id: gendirdeps.mk,v 1.41 2019/11/21 23:50:40 sjg Exp $
+# $Id: gendirdeps.mk,v 1.46 2020/08/19 17:51:53 sjg Exp $
 
-# Copyright (c) 2010-2013, Juniper Networks, Inc.
+# Copyright (c) 2011-2020, Simon J. Gerraty
+# Copyright (c) 2010-2018, Juniper Networks, Inc.
 # All rights reserved.
-# 
+#
 # Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions 
-# are met: 
+# modification, are permitted provided that the following conditions
+# are met:
 # 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer. 
+#    notice, this list of conditions and the following disclaimer.
 # 2. Redistributions in binary form must reproduce the above copyright
 #    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.  
-# 
+#    documentation and/or other materials provided with the distribution.
+#
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -23,7 +24,7 @@
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #
 # This makefile [re]generates ${.MAKE.DEPENDFILE}
@@ -51,7 +52,7 @@ all:
 _CURDIR ?= ${.CURDIR}
 _OBJDIR ?= ${.OBJDIR}
 _OBJTOP ?= ${OBJTOP}
-_OBJROOT ?= ${OBJROOT:U${_OBJTOP}}
+_OBJROOT ?= ${OBJROOT:U${_OBJTOP:H}}
 .if ${_OBJROOT:M*/}
 _slash=/
 .else
@@ -104,7 +105,7 @@ GENDIRDEPS_FILTER += ${GENDIRDEPS_FILTER_DIR_VARS:@v@S,${$v},_{${v}},@}
 GENDIRDEPS_FILTER += ${GENDIRDEPS_FILTER_VARS:@v@S,/${$v}/,/_{${v}}/,@:NS,//,*:u}
 .endif
 
-# this (*should* be set in meta.sys.mk) 
+# this (*should* be set in meta.sys.mk)
 # is the script that extracts what we want.
 META2DEPS ?= ${.PARSEDIR}/meta2deps.sh
 META2DEPS := ${META2DEPS}
@@ -122,7 +123,7 @@ _py_d =
 .if ${META2DEPS:E} == "py"
 # we can afford to do this all the time.
 DPDEPS ?= no
-META2DEPS_CMD = ${_time} ${PYTHON} ${META2DEPS} ${_py_d} 
+META2DEPS_CMD = ${_time} ${PYTHON} ${META2DEPS} ${_py_d}
 .if ${DPDEPS:tl} != "no"
 META2DEPS_CMD += -D ${DPDEPS}
 .endif
@@ -155,8 +156,8 @@ M2D_OBJROOTS += ${STAGE_ROOT}
 # and tell it not to add machine qualifiers
 META2DEPS_ARGS += MACHINE=none
 .endif
-.if defined(SB_BACKING_SB) 
-META2DEPS_CMD += -S ${SB_BACKING_SB}/src 
+.if defined(SB_BACKING_SB)
+META2DEPS_CMD += -S ${SB_BACKING_SB}/src
 M2D_OBJROOTS += ${SB_BACKING_SB}/${SB_OBJPREFIX}
 .endif
 
@@ -177,7 +178,7 @@ _meta_files := ${META_FILES:N\*.meta:O:u}
 # assume a big list
 _meta_files_arg= @meta.list
 .if empty(_meta_files) && ${META_FILES:M\*.meta} != ""
-# XXX this should be considered a bad idea, 
+# XXX this should be considered a bad idea,
 # since we cannot ignore stale .meta
 x != cd ${_OBJDIR} && find . -name '*.meta' -print -o \( -type d ! -name . -prune \) | sed 's,^./,,' > meta.list; echo
 .elif ${_meta_files:[#]} > 500
@@ -234,10 +235,10 @@ dir_list += ${ddeps}
 
 # DIRDEPS represent things that had to have been built first
 # so they should all be undir OBJTOP.
-# Note that ${_OBJTOP}/bsd/include/machine will get reported 
+# Note that ${_OBJTOP}/bsd/include/machine will get reported
 # to us as $SRCTOP/bsd/sys/$MACHINE_ARCH/include meaning we
 # will want to visit bsd/include
-# so we add 
+# so we add
 # ${"${dir_list:M*bsd/sys/${MACHINE_ARCH}/include}":?bsd/include:}
 # to GENDIRDEPS_DIR_LIST_XTRAS
 _objtops = ${OBJTOP} ${_OBJTOP} ${_objtop}
@@ -272,11 +273,11 @@ DIRDEPS = \
 
 # We only consider things below $RELDIR/ if they have a makefile.
 # This is the same test that _DIRDEP_USE applies.
-# We have do a double test with dirdep_list as it _may_ contain 
+# We have do a double test with dirdep_list as it _may_ contain
 # qualified dirs - if we got anything from a stage dir.
 # qualdir_list we know are all qualified.
 # It would be nice do peform this check for all of DIRDEPS,
-# but we cannot assume that all of the tree is present, 
+# but we cannot assume that all of the tree is present,
 # in fact we can only assume that RELDIR is.
 DIRDEPS += \
 	${dirdep_list:M${RELDIR}/*:@d@${.MAKE.MAKEFILE_PREFERENCE:@m@${exists(${SRCTOP}/$d/$m):?$d:${exists(${SRCTOP}/${d:R}/$m):?$d:}}@}@} \
@@ -309,7 +310,7 @@ SRC_DIRDEPS = \
 SRC_DIRDEPS := ${SRC_DIRDEPS:${GENDIRDEPS_SRC_FILTER:UN/*:ts:}:C,//+,/,g:O:u}
 
 # if you want to capture SRC_DIRDEPS in .MAKE.DEPENDFILE put
-# SRC_DIRDEPS_FILE = ${_DEPENDFILE} 
+# SRC_DIRDEPS_FILE = ${_DEPENDFILE}
 # in local.gendirdeps.mk
 .if ${SRC_DIRDEPS_FILE:Uno:tl} != "no"
 ECHO_SRC_DIRDEPS = echo 'SRC_DIRDEPS = \'; echo '${SRC_DIRDEPS:@d@	$d \\${.newline}@}'; echo;
@@ -324,7 +325,7 @@ ${SRC_DIRDEPS_FILE}: ${META_FILES} ${_this} ${META2DEPS}
 .endif
 .endif
 .endif
-_include_src_dirdeps ?= 
+_include_src_dirdeps ?=
 
 all:	${_DEPENDFILE}
 
@@ -339,6 +340,8 @@ CAT_DEPEND ?= .depend
 .PHONY: ${_DEPENDFILE}
 .endif
 
+LOCAL_DEPENDS_GUARD ?= _{.MAKE.LEVEL} > 0
+
 # 'cat .depend' should suffice, but if we are mixing build modes
 # .depend may contain things we don't want.
 # The sed command at the end of the stream, allows for the filters
@@ -350,7 +353,7 @@ ${_DEPENDFILE}: .NOMETA ${CAT_DEPEND:M.depend} ${META_FILES:O:u:@m@${exists($m):
 	${_include_src_dirdeps} \
 	echo '.include <dirdeps.mk>'; \
 	echo; \
-	echo '.if $${DEP_RELDIR} == $${_DEP_RELDIR}'; \
+	echo '.if ${LOCAL_DEPENDS_GUARD}'; \
 	echo '# local dependencies - needed for -jN in clean tree'; \
 	[ -s ${CAT_DEPEND} ] && { grep : ${CAT_DEPEND} | grep -v '[/\\]'; }; \
 	echo '.endif' ) | sed 's,_\([{(]\),$$\1,g' > $@.new${.MAKE.PID}
diff --git a/share/mk/local.autodep.mk b/share/mk/local.autodep.mk
index 6d3b3b9c32b6..ee73b23aadcf 100644
--- a/share/mk/local.autodep.mk
+++ b/share/mk/local.autodep.mk
@@ -8,6 +8,9 @@ UPDATE_DEPENDFILE= no
 .endif
 .endif
 
+NOSSPPICO?= .nossppico
+OBJ_EXTENSIONS+= ${NOSSPPICO}
+
 CFLAGS+= ${CFLAGS_LAST}
 CXXFLAGS+= ${CXXFLAGS_LAST}
 LDFLAGS+= ${LDFLAGS_LAST}
diff --git a/share/mk/local.dirdeps.mk b/share/mk/local.dirdeps.mk
index 6e1a56d56036..16c9ee5a55ec 100644
--- a/share/mk/local.dirdeps.mk
+++ b/share/mk/local.dirdeps.mk
@@ -179,8 +179,6 @@ DIRDEPS+=	usr.bin/yacc.host
 .endif
 _DPADD= ${DPADD} ${_PROGS_DPADD}
 .if !empty(_DPADD)
-# Taken from meta.autodep.mk (where it only does something with
-# BUILD_AT_LEVEL0, which we don't use).
 # This only works for DPADD with full OBJ/SRC paths, which is mostly just
 # _INTERNALLIBS.
 _DP_DIRDEPS= \
diff --git a/share/mk/local.gendirdeps.mk b/share/mk/local.gendirdeps.mk
index b19e5f64ee74..3ec2be4cc865 100644
--- a/share/mk/local.gendirdeps.mk
+++ b/share/mk/local.gendirdeps.mk
@@ -67,3 +67,6 @@ GENDIRDEPS_FILTER_VARS+= \
 
 GENDIRDEPS_FILTER+= ${GENDIRDEPS_FILTER_DIR_VARS:@v@S,${$v},_{${v}},@}
 GENDIRDEPS_FILTER+= ${GENDIRDEPS_FILTER_VARS:@v@S,/${$v}/,/_{${v}}/,@:NS,//,*:u}
+
+# avoid churn for now
+LOCAL_DEPENDS_GUARD= _{DEP_RELDIR} == _{_DEP_RELDIR}
diff --git a/share/mk/local.meta.sys.mk b/share/mk/local.meta.sys.mk
index e603b4f8091f..b590b37a1d65 100644
--- a/share/mk/local.meta.sys.mk
+++ b/share/mk/local.meta.sys.mk
@@ -99,13 +99,10 @@ OBJTOP := ${HOST_OBJTOP}
 .if ${.MAKE.LEVEL} == 0 || empty(PYTHON)
 PYTHON ?= /usr/local/bin/python
 .export PYTHON
-# this works best if share/mk is ready for it.
-BUILD_AT_LEVEL0= no
 # _SKIP_BUILD is not 100% as it requires wrapping all 'all:' targets to avoid
 # building in MAKELEVEL0.  Just prohibit 'all' entirely in this case to avoid
 # problems.
-.if ${MK_DIRDEPS_BUILD} == "yes" && \
-    ${.MAKE.LEVEL} == 0 && ${BUILD_AT_LEVEL0:Uyes:tl} == "no"
+.if ${MK_DIRDEPS_BUILD} == "yes" && ${.MAKE.LEVEL} == 0
 .MAIN: dirdeps
 .if make(all)
 .error DIRDEPS_BUILD: Please run '${MAKE}' instead of '${MAKE} all'.
diff --git a/share/mk/meta.autodep.mk b/share/mk/meta.autodep.mk
index 7ebded4edc29..4dda9970774e 100644
--- a/share/mk/meta.autodep.mk
+++ b/share/mk/meta.autodep.mk
@@ -1,5 +1,5 @@
 # $FreeBSD$
-# $Id: meta.autodep.mk,v 1.50 2018/06/08 01:25:31 sjg Exp $
+# $Id: meta.autodep.mk,v 1.53 2020/11/08 05:47:56 sjg Exp $
 
 #
 #	@(#) Copyright (c) 2010, Simon J. Gerraty
@@ -22,11 +22,10 @@ __${_this}__: .NOTMAIN
 .-include <local.autodep.mk>
 
 PICO?= .pico
-NOSSPPICO?= .nossppico
 
 .if defined(SRCS)
 # it would be nice to be able to query .SUFFIXES
-OBJ_EXTENSIONS+= .o .po .lo ${PICO} ${NOSSPPICO}
+OBJ_EXTENSIONS+= .o .po .lo ${PICO}
 
 # explicit dependencies help short-circuit .SUFFIX searches
 SRCS_DEP_FILTER+= N*.[hly]
@@ -59,7 +58,7 @@ _OBJTOP ?= ${OBJTOP}
 _OBJROOT ?= ${OBJROOT:U${_OBJTOP}}
 _DEPENDFILE := ${_CURDIR}/${.MAKE.DEPENDFILE:T}
 
-.if ${.MAKE.LEVEL} > 0 || ${BUILD_AT_LEVEL0:Uyes:tl} == "yes"
+.if ${.MAKE.LEVEL} > 0
 # do not allow auto update if we ever built this dir without filemon
 NO_FILEMON_COOKIE = .nofilemon
 CLEANFILES += ${NO_FILEMON_COOKIE}
@@ -75,10 +74,8 @@ UPDATE_DEPENDFILE = NO
 .endif
 
 .if ${.MAKE.LEVEL} == 0
-.if ${BUILD_AT_LEVEL0:Uyes:tl} == "no"
 UPDATE_DEPENDFILE = NO
 .endif
-.endif
 .if !exists(${_DEPENDFILE})
 _bootstrap_dirdeps = yes
 .endif
@@ -182,7 +179,8 @@ DEPEND_SUFFIXES += .c .h .cpp .hpp .cxx .hxx .cc .hh
 	@case "${.MAKE.META.FILES:T:M*.po.*}" in \
 	*.po.*) mv $@.${.MAKE.PID} $@;; \
 	*) { cat $@.${.MAKE.PID}; \
-	sed 's,\${NOSSPPICO}:,.o:,;s,\${PICO}:,.o:,;s,\.o:,.po:,' $@.${.MAKE.PID}; } | sort -u > $@; \
+	sed ${OBJ_EXTENSIONS:N.o:N.po:@o@-e 's,\$o:,.o:,'@} \
+		-e 's,\.o:,.po:,' $@.${.MAKE.PID}; } | sort -u > $@; \
 	rm -f $@.${.MAKE.PID};; \
 	esac
 .else
@@ -285,9 +283,7 @@ ${_DEPENDFILE}: ${_depend} ${.PARSEDIR}/gendirdeps.mk  ${META2DEPS} $${.MAKE.MET
 .endif
 
 .if ${_bootstrap_dirdeps} == "yes"
-.if ${BUILD_AT_LEVEL0:Uno} == "no"
 DIRDEPS+= ${RELDIR}.${TARGET_SPEC:U${MACHINE}}
-.endif
 # make sure this is included at least once
 .include <dirdeps.mk>
 .else
@@ -314,7 +310,7 @@ _reldir_finish: .NOMETA
 _reldir_failed: .NOMETA
 	@echo "${TIME_STAMP} Failed ${RELDIR}.${TARGET_SPEC} seconds=$$(( ${now_utc} - ${start_utc} )) ${meta_stats}"
 
-.if defined(WITH_META_STATS) && ${.MAKE.LEVEL} > 0
+.if !defined(WITHOUT_META_STATS) && ${.MAKE.LEVEL} > 0
 .END: _reldir_finish
 .ERROR: _reldir_failed
 .endif
diff --git a/share/mk/meta.stage.mk b/share/mk/meta.stage.mk
index f6eff154fba7..c362f0b590ad 100644
--- a/share/mk/meta.stage.mk
+++ b/share/mk/meta.stage.mk
@@ -1,15 +1,15 @@
 # $FreeBSD$
-# $Id: meta.stage.mk,v 1.55 2017/10/27 01:17:09 sjg Exp $
+# $Id: meta.stage.mk,v 1.60 2020/08/19 17:51:53 sjg Exp $
 #
 #	@(#) Copyright (c) 2011-2017, Simon J. Gerraty
 #
 #	This file is provided in the hope that it will
 #	be of use.  There is absolutely NO WARRANTY.
 #	Permission to copy, redistribute or otherwise
-#	use this file is hereby granted provided that 
+#	use this file is hereby granted provided that
 #	the above copyright notice and this notice are
-#	left intact. 
-#      
+#	left intact.
+#
 #	Please send copies of changes and bug-fixes to:
 #	sjg@crufty.net
 #
@@ -19,9 +19,11 @@
 .if !target(__${.PARSEFILE}__)
 # the guard target is defined later
 
+.-include <local.meta.stage.mk>
+
 .if ${.MAKE.DEPENDFILE_PREFERENCE:U${.MAKE.DEPENDFILE}:M*.${MACHINE}} != ""
 # this is generally safer anyway
-_dirdep ?= ${RELDIR}.${MACHINE}
+_dirdep ?= ${RELDIR}.${TARGET_SPEC:U${MACHINE}}
 .else
 _dirdep ?= ${RELDIR}
 .endif
@@ -68,7 +70,7 @@ LN_CP_SCRIPT = LnCp() { \
 # a warning is handy when bootstapping different options.
 STAGE_CONFLICT?= ERROR
 .if ${STAGE_CONFLICT:tl} == "error"
-STAGE_CONFLICT_ACTION= exit 1;
+STAGE_CONFLICT_ACTION= exit 1
 .else
 STAGE_CONFLICT_ACTION=
 .endif
@@ -79,8 +81,10 @@ STAGE_DIRDEP_SCRIPT = ${LN_CP_SCRIPT}; StageDirdep() { \
   t=$$1; \
   if [ -s $$t.dirdep ]; then \
 	cmp -s .dirdep $$t.dirdep && return; \
-	echo "${STAGE_CONFLICT}: $$t installed by `cat $$t.dirdep` not ${_dirdep}" >&2; \
-	${STAGE_CONFLICT_ACTION} \
+	x=`cat $$t.dirdep`; \
+	case "${RELDIR}:${_dirdep}" in $${x%.*}:$${x}*) ;; \
+	*) echo "${STAGE_CONFLICT}: $$t installed by $$x not ${_dirdep}" >&2; \
+	${STAGE_CONFLICT_ACTION} ;; esac; \
   fi; \
   LnCp .dirdep $$t.dirdep || exit 1; }
 
@@ -142,7 +146,7 @@ _STAGE_AS_BASENAME_USE:        .USE .dirdep ${.TARGET:T}
 
 .if !empty(STAGE_INCSDIR)
 .if !empty(STAGE_INCS)
-stage_incs: ${STAGE_INCS}
+stage_incs: ${STAGE_INCS:N*\**}
 .endif
 .if target(stage_incs) || !empty(.ALLTARGETS:Mstage_includes)
 STAGE_TARGETS += stage_incs
@@ -157,7 +161,7 @@ stage_incs:	.dirdep
 
 .if !empty(STAGE_LIBDIR)
 .if !empty(STAGE_LIBS)
-stage_libs: ${STAGE_LIBS}
+stage_libs: ${STAGE_LIBS:N*\**}
 .endif
 .if target(stage_libs)
 STAGE_TARGETS += stage_libs
@@ -192,7 +196,7 @@ CLEANFILES += ${STAGE_SETS:@s@stage*$s@}
 # some makefiles need to populate multiple directories
 .for s in ${STAGE_SETS:O:u}
 .if !empty(STAGE_FILES.$s)
-stage_files.$s: ${STAGE_FILES.$s}
+stage_files.$s: ${STAGE_FILES.$s:N*\**}
 .endif
 .if target(stage_files.$s) || target(stage_files${s:S,^,.,:N._default})
 STAGE_TARGETS += stage_files
@@ -206,7 +210,7 @@ stage_files.$s:	.dirdep
 STAGE_FILES ?= ${.ALLSRC:N.dirdep:Nstage_*}
 stage_files:	.dirdep
 .endif
-	@${STAGE_FILE_SCRIPT}; StageFiles ${FLAGS.$@} ${STAGE_FILES_DIR.$s:U${STAGE_DIR.$s}:${STAGE_DIR_FILTER}} ${STAGE_FILES.$s}
+	@${STAGE_FILE_SCRIPT}; StageFiles ${FLAGS.$@} ${STAGE_FILES_DIR.$s:U${STAGE_DIR.$s}:${STAGE_DIR_FILTER}} ${STAGE_FILES.$s:O}
 	@touch $@
 .endif
 .endif
@@ -263,7 +267,7 @@ CLEANFILES += ${STAGE_AS_SETS:@s@stage*$s@}
 # both operations happen together
 .for s in ${STAGE_AS_SETS:O:u}
 .if !empty(STAGE_AS.$s)
-stage_as.$s: ${STAGE_AS.$s}
+stage_as.$s: ${STAGE_AS.$s:N*\**}
 .endif
 .if target(stage_as.$s)
 STAGE_TARGETS += stage_as
@@ -272,13 +276,13 @@ STAGE_AS.$s ?= ${.ALLSRC:N.dirdep:Nstage_*}
 .stage_as.$s:
 stage_as:	stage_as.$s
 stage_as.$s:	.dirdep
-	@${STAGE_AS_SCRIPT}; StageAs ${FLAGS.$@} ${STAGE_FILES_DIR.$s:U${STAGE_DIR.$s}:${STAGE_DIR_FILTER}} ${STAGE_AS.$s:@f@$f ${STAGE_AS_${f:tA}:U${STAGE_AS_${f:T}:U${f:T}}}@}
+	@${STAGE_AS_SCRIPT}; StageAs ${FLAGS.$@} ${STAGE_FILES_DIR.$s:U${STAGE_DIR.$s}:${STAGE_DIR_FILTER}} ${STAGE_AS.$s:O:@f@$f ${STAGE_AS_${f:tA}:U${STAGE_AS_${f:T}:U${f:T}}}@}
 	@touch $@
 .endif
 .endif
 
 .if !empty(STAGE_AS_AND_SYMLINK.$s)
-stage_as_and_symlink.$s: ${STAGE_AS_AND_SYMLINK.$s}
+stage_as_and_symlink.$s: ${STAGE_AS_AND_SYMLINK.$s:N*\**}
 .endif
 .if target(stage_as_and_symlink.$s)
 STAGE_TARGETS += stage_as_and_symlink
@@ -287,8 +291,8 @@ STAGE_AS_AND_SYMLINK.$s ?= ${.ALLSRC:N.dirdep:Nstage_*}
 .stage_as_and_symlink.$s:
 stage_as_and_symlink:	stage_as_and_symlink.$s
 stage_as_and_symlink.$s:	.dirdep
-	@${STAGE_AS_SCRIPT}; StageAs ${FLAGS.$@} ${STAGE_FILES_DIR.$s:U${STAGE_DIR.$s}:${STAGE_DIR_FILTER}} ${STAGE_AS_AND_SYMLINK.$s:@f@$f ${STAGE_AS_${f:tA}:U${STAGE_AS_${f:T}:U${f:T}}}@}
-	@${STAGE_LINKS_SCRIPT}; StageLinks -s ${STAGE_FILES_DIR.$s:U${STAGE_DIR.$s}:${STAGE_DIR_FILTER}} ${STAGE_AS_AND_SYMLINK.$s:@f@${STAGE_AS_${f:tA}:U${STAGE_AS_${f:T}:U${f:T}}} $f@}
+	@${STAGE_AS_SCRIPT}; StageAs ${FLAGS.$@} ${STAGE_FILES_DIR.$s:U${STAGE_DIR.$s}:${STAGE_DIR_FILTER}} ${STAGE_AS_AND_SYMLINK.$s:O:@f@$f ${STAGE_AS_${f:tA}:U${STAGE_AS_${f:T}:U${f:T}}}@}
+	@${STAGE_LINKS_SCRIPT}; StageLinks -s ${STAGE_FILES_DIR.$s:U${STAGE_DIR.$s}:${STAGE_DIR_FILTER}} ${STAGE_AS_AND_SYMLINK.$s:O:@f@${STAGE_AS_${f:tA}:U${STAGE_AS_${f:T}:U${f:T}}} $f@}
 	@touch $@
 .endif
 .endif
diff --git a/share/mk/meta.subdir.mk b/share/mk/meta.subdir.mk
index 966b6e0630f3..781a52856b64 100644
--- a/share/mk/meta.subdir.mk
+++ b/share/mk/meta.subdir.mk
@@ -1,5 +1,5 @@
 # $FreeBSD$
-# $Id: meta.subdir.mk,v 1.11 2015/11/24 22:26:51 sjg Exp $
+# $Id: meta.subdir.mk,v 1.12 2020/08/19 17:51:53 sjg Exp $
 
 #
 #	@(#) Copyright (c) 2010, Simon J. Gerraty
@@ -7,10 +7,10 @@
 #	This file is provided in the hope that it will
 #	be of use.  There is absolutely NO WARRANTY.
 #	Permission to copy, redistribute or otherwise
-#	use this file is hereby granted provided that 
+#	use this file is hereby granted provided that
 #	the above copyright notice and this notice are
-#	left intact. 
-#      
+#	left intact.
+#
 #	Please send copies of changes and bug-fixes to:
 #	sjg@crufty.net
 #
@@ -33,7 +33,7 @@ DIRDEPS = ${SUBDIR:N.WAIT:O:u:@d@${RELDIR}/$d@}
 .include <meta.autodep.mk>
 .else
 # this is the cunning bit
-# actually it is probably a bit risky 
+# actually it is probably a bit risky
 # since we may pickup subdirs which are not relevant
 # the alternative is a walk through the tree though
 # which is difficult without a sub-make.
diff --git a/share/mk/meta.sys.mk b/share/mk/meta.sys.mk
index 8c39757e15af..94e6ef862fdb 100644
--- a/share/mk/meta.sys.mk
+++ b/share/mk/meta.sys.mk
@@ -1,16 +1,16 @@
 # $FreeBSD$
-# $Id: meta.sys.mk,v 1.34 2019/01/24 19:36:25 sjg Exp $
+# $Id: meta.sys.mk,v 1.38 2020/08/19 17:51:53 sjg Exp $
 
 #
-#	@(#) Copyright (c) 2010, Simon J. Gerraty
+#	@(#) Copyright (c) 2010-2020, Simon J. Gerraty
 #
 #	This file is provided in the hope that it will
 #	be of use.  There is absolutely NO WARRANTY.
 #	Permission to copy, redistribute or otherwise
-#	use this file is hereby granted provided that 
+#	use this file is hereby granted provided that
 #	the above copyright notice and this notice are
-#	left intact. 
-#      
+#	left intact.
+#
 #	Please send copies of changes and bug-fixes to:
 #	sjg@crufty.net
 #
@@ -129,9 +129,11 @@ META_NOECHO= :
 # ignore mtime of shell
 # and mtime of makefiles does not matter in meta mode
 .MAKE.META.IGNORE_PATHS += \
-        ${MAKEFILE} \
-        ${SHELL} \
-        ${SYS_MK_DIR}
+	${MAKEFILE} \
+	${MAKE_SHELL} \
+	${SHELL} \
+	${SYS_MK_DIR} \
+
 
 .if ${UPDATE_DEPENDFILE:Uyes:tl} != "no"
 .if ${.MAKEFLAGS:Uno:M-k} != ""
@@ -154,12 +156,6 @@ dirdeps:
 # the first .MAIN: is what counts
 # by default dirdeps is all we want at level0
 .MAIN: dirdeps
-# tell dirdeps.mk what we want
-BUILD_AT_LEVEL0 = no
-.endif
-.if ${.TARGETS:Nall} == "" 
-# it works best if we do everything via sub-makes
-BUILD_AT_LEVEL0 ?= no
 .endif
 
 .endif
diff --git a/share/mk/meta2deps.py b/share/mk/meta2deps.py
index 700dc2073b8a..42e4bb353446 100755
--- a/share/mk/meta2deps.py
+++ b/share/mk/meta2deps.py
@@ -25,7 +25,7 @@ We only pay attention to a subset of the information in the
 
 'W'	files opened for write or read-write,
 	for filemon V3 and earlier.
-        
+
 'E'	files executed.
 
 'L'	files linked
@@ -38,19 +38,20 @@ We only pay attention to a subset of the information in the
 """
 RCSid:
 	$FreeBSD$
-	$Id: meta2deps.py,v 1.27 2017/05/24 00:04:04 sjg Exp $
+	$Id: meta2deps.py,v 1.34 2020/10/02 03:11:17 sjg Exp $
 
-	Copyright (c) 2011-2013, Juniper Networks, Inc.
+	Copyright (c) 2011-2020, Simon J. Gerraty
+	Copyright (c) 2011-2017, Juniper Networks, Inc.
 	All rights reserved.
 
 	Redistribution and use in source and binary forms, with or without
-	modification, are permitted provided that the following conditions 
-	are met: 
+	modification, are permitted provided that the following conditions
+	are met:
 	1. Redistributions of source code must retain the above copyright
-	   notice, this list of conditions and the following disclaimer. 
+	   notice, this list of conditions and the following disclaimer.
 	2. Redistributions in binary form must reproduce the above copyright
 	   notice, this list of conditions and the following disclaimer in the
-	   documentation and/or other materials provided with the distribution.  
+	   documentation and/or other materials provided with the distribution.
 
 	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 	"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
@@ -62,8 +63,8 @@ RCSid:
 	DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 	THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 	(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-	OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
- 
+	OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
 """
 
 import os, re, sys
@@ -81,7 +82,11 @@ def resolve(path, cwd, last_dir=None, debug=0, debug_out=sys.stderr):
     if path.endswith('/.'):
         path = path[0:-2]
     if len(path) > 0 and path[0] == '/':
-        return path
+        if os.path.exists(path):
+            return path
+        if debug > 2:
+            print("skipping non-existent:", path, file=debug_out)
+        return None
     if path == '.':
         return cwd
     if path.startswith('./'):
@@ -139,6 +144,8 @@ def abspath(path, cwd, last_dir=None, debug=0, debug_out=sys.stderr):
     rpath = resolve(path, cwd, last_dir, debug, debug_out)
     if rpath:
         path = rpath
+    elif len(path) > 0 and path[0] == '/':
+        return None
     if (path.find('/') < 0 or
         path.find('./') > 0 or
         path.endswith('/..')):
@@ -158,7 +165,7 @@ def sort_unique(list, cmp=None, key=None, reverse=False):
 
 def add_trims(x):
     return ['/' + x + '/',
-            '/' + x, 
+            '/' + x,
             x + '/',
             x]
 
@@ -175,7 +182,7 @@ class MetaFile:
     obj_deps = []
     src_deps = []
     file_deps = []
-    
+
     def __init__(self, name, conf={}):
         """if name is set we will parse it now.
         conf can have the follwing keys:
@@ -192,7 +199,7 @@ class MetaFile:
 
         TARGET_SPEC
                 Sometimes MACHINE isn't enough.
-                
+
         HOST_TARGET
                 when we build for the pseudo machine 'host'
                 the object tree uses HOST_TARGET rather than MACHINE.
@@ -216,7 +223,7 @@ class MetaFile:
         debug_out open file to send debug output to (sys.stderr)
 
         """
-        
+
         self.name = name
         self.debug = getv(conf, 'debug', 0)
         self.debug_out = getv(conf, 'debug_out', sys.stderr)
@@ -304,11 +311,11 @@ class MetaFile:
         self.obj_deps = []
         self.src_deps = []
         self.file_deps = []
-          
+
     def dirdeps(self, sep='\n'):
         """return DIRDEPS"""
         return sep.strip() + sep.join(self.obj_deps)
-    
+
     def src_dirdeps(self, sep='\n'):
         """return SRC_DIRDEPS"""
         return sep.strip() + sep.join(self.src_deps)
@@ -327,7 +334,7 @@ class MetaFile:
     def seenit(self, dir):
         """rememer that we have seen dir."""
         self.seen[dir] = 1
-          
+
     def add(self, list, data, clue=''):
         """add data to list if it isn't already there."""
         if data not in list:
@@ -386,10 +393,10 @@ class MetaFile:
             # give a useful clue
             print('{}:{}: '.format(self.name, self.line), end=' ', file=sys.stderr)
             raise
-        
+
     def parse(self, name=None, file=None):
         """A meta file looks like:
-        
+
         # Meta data file "path"
         CMD "command-line"
         CWD "cwd"
@@ -475,6 +482,10 @@ class MetaFile:
                 continue
             elif w[0] == 'C':
                 cwd = abspath(w[2], cwd, None, self.debug, self.debug_out)
+                if not cwd:
+                    cwd = w[2]
+                    if self.debug > 1:
+                        print("missing cwd=", cwd, file=self.debug_out)
                 if cwd.endswith('/.'):
                     cwd = cwd[0:-2]
                 self.last_dir = pid_last_dir[pid] = cwd
@@ -491,13 +502,16 @@ class MetaFile:
             if w[0] in 'ML':
                 # these are special, tread src as read and
                 # target as write
-                self.parse_path(w[1].strip("'"), cwd, 'R', w)
-                self.parse_path(w[2].strip("'"), cwd, 'W', w)
+                self.parse_path(w[2].strip("'"), cwd, 'R', w)
+                self.parse_path(w[3].strip("'"), cwd, 'W', w)
                 continue
             elif w[0] in 'ERWS':
                 path = w[2]
+                if path == '.':
+                    continue
                 self.parse_path(path, cwd, w[0], w)
 
+        assert(version > 0)
         if not file:
             f.close()
 
@@ -563,7 +577,7 @@ class MetaFile:
                     print("ldir=", self.last_dir, file=self.debug_out)
                 return
 
-        if op in 'ERW':
+        if op in 'ER':
             # finally, we get down to it
             if dir == self.cwd or dir == self.curdir:
                 return
@@ -591,13 +605,13 @@ class MetaFile:
                 self.seenit(w[2])
                 self.seenit(dir)
 
-                            
+
 def main(argv, klass=MetaFile, xopts='', xoptf=None):
     """Simple driver for class MetaFile.
 
     Usage:
         script [options] [key=value ...] "meta" ...
-        
+
     Options and key=value pairs contribute to the
     dictionary passed to MetaFile.
 
@@ -605,7 +619,7 @@ def main(argv, klass=MetaFile, xopts='', xoptf=None):
                 add "SRCTOP" to the "SRCTOPS" list.
 
     -C "CURDIR"
-    
+
     -O "OBJROOT"
                 add "OBJROOT" to the "OBJROOTS" list.
 
@@ -616,7 +630,7 @@ def main(argv, klass=MetaFile, xopts='', xoptf=None):
     -H "HOST_TARGET"
 
     -D "DPDEPS"
-    
+
     -d  bumps debug level
 
     """
@@ -656,7 +670,7 @@ def main(argv, klass=MetaFile, xopts='', xoptf=None):
 
     debug = 0
     output = True
-    
+
     opts, args = getopt.getopt(argv[1:], 'a:dS:C:O:R:m:D:H:qT:X:' + xopts)
     for o, a in opts:
         if o == '-a':
diff --git a/share/mk/meta2deps.sh b/share/mk/meta2deps.sh
index d2536e6063ed..4767b83f4343 100755
--- a/share/mk/meta2deps.sh
+++ b/share/mk/meta2deps.sh
@@ -5,11 +5,11 @@
 #
 # SYNOPSIS:
 #	meta2deps.sh SB="SB" "meta" ...
-#	
+#
 # DESCRIPTION:
 #	This script looks each "meta" file and extracts the
 #	information needed to deduce build and src dependencies.
-#	
+#
 #	To do this, we extract the 'CWD' record as well as all the
 #	syscall traces which describe 'R'ead, 'C'hdir and 'E'xec
 #	syscalls.
@@ -76,20 +76,20 @@
 
 # RCSid:
 #	$FreeBSD$
-#	$Id: meta2deps.sh,v 1.12 2016/12/13 20:44:16 sjg Exp $
+#	$Id: meta2deps.sh,v 1.14 2020/10/02 03:11:17 sjg Exp $
 
 # Copyright (c) 2010-2013, Juniper Networks, Inc.
 # All rights reserved.
-# 
+#
 # Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions 
-# are met: 
+# modification, are permitted provided that the following conditions
+# are met:
 # 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer. 
+#    notice, this list of conditions and the following disclaimer.
 # 2. Redistributions in binary form must reproduce the above copyright
 #    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.  
-# 
+#    documentation and/or other materials provided with the distribution.
+#
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -100,14 +100,14 @@
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 meta2src() {
     cat /dev/null "$@" |
     sed -n '/^R .*\.[chyl]$/s,^..[0-9]* ,,p' |
     sort -u
 }
-    
+
 meta2dirs() {
     cat /dev/null "$@" |
     sed -n '/^R .*\/.*\.[a-z0-9][^\/]*$/s,^..[0-9]* \(.*\)/[^/]*$,\1,p' |
@@ -142,6 +142,11 @@ _excludes_f() {
     egrep -v "$EXCLUDES"
 }
 
+error() {
+    echo "ERROR: $@" >&2
+    exit 1
+}
+
 meta2deps() {
     DPDEPS=
     SRCTOPS=$SRCTOP
@@ -168,7 +173,7 @@ meta2deps() {
     case "$MACHINE" in
     host) _ht=$HOST_TARGET;;
     esac
-    
+
     for o in $OBJROOTS
     do
 	case "$MACHINE,/$o/" in
@@ -202,7 +207,7 @@ meta2deps() {
     obj_re=
     add_list '|' -s '/*' src_re $SRCTOPS
     add_list '|' -s '*' obj_re $OBJROOTS
-    
+
     [ -z "$RELDIR" ] && unset DPDEPS
     tf=/tmp/m2d$$-$USER
     rm -f $tf.*
@@ -235,8 +240,8 @@ meta2deps() {
 	;;
     *) cat /dev/null "$@";;
     esac 2> /dev/null |
-    sed -e 's,^CWD,C C,;/^[CREFLM] /!d' -e "s,',,g" |
-    $_excludes |
+    sed -e 's,^CWD,C C,;/^[CREFLMV] /!d' -e "s,',,g" |
+    $_excludes | ( version=no
     while read op pid path junk
     do
 	: op=$op pid=$pid path=$path
@@ -248,6 +253,12 @@ meta2deps() {
 		SB=`echo $CWD | sed 's,/obj.*,,'`
 	    fi
 	    SRCTOP=${SRCTOP:-$SB/src}
+	    case "$verion" in
+	    no) ;;		# ignore
+	    0) error "no filemon data";;
+	    *) ;;
+	    esac
+	    version=0
 	    continue
 	    ;;
 	$pid,$pid) ;;
@@ -262,6 +273,7 @@ meta2deps() {
 	esac
 
 	case "$op,$path" in
+	V,*) version=$path; continue;;
 	W,*srcrel|*.dirdep) continue;;
 	C,*)
 	    case "$path" in
@@ -273,10 +285,10 @@ meta2deps() {
 	    eval cwd_$pid=$cwd
 	    continue
 	    ;;
-	F,*) # $path is new pid  
+	F,*) # $path is new pid
 	    eval cwd_$path=$cwd ldir_$path=$ldir
 	    continue
-	    ;;	  
+	    ;;
 	*)  dir=${path%/*}
 	    case "$path" in
 	    $src_re|$obj_re) ;;
@@ -367,6 +379,9 @@ meta2deps() {
 	    echo $dir;;
 	esac
     done > $tf.dirdep
+    case "$version" in
+    0) error "no filemon data";;
+    esac ) || exit 1
     _nl=echo
     for f in $tf.dirdep $tf.qual $tf.srcdep
     do