stuff

33 files changed, 784 insertions, 545 deletions

diff --git a/build-aux/Makefile.each.head/00-am.mk b/build-aux/Makefile.each.head/00-am.mk
new file mode 100644
index 0000000000..f8c20b7706
--- /dev/null
+++ b/build-aux/Makefile.each.head/00-am.mk
@@ -0,0 +1,5 @@
+$(foreach v,$(foreach p,$(am.primaries),am.inst_$p am.noinst_$p am.check_$p),\
+          $(eval $v ?=))
+am.CFLAGS ?=
+am.CPPFLAGS ?=
+am.subdirs ?=
diff --git a/build-aux/Makefile.each.head/00-dist.mk b/build-aux/Makefile.each.head/00-dist.mk
index a0943059ba..924d79aa7c 100644
--- a/build-aux/Makefile.each.head/00-dist.mk
+++ b/build-aux/Makefile.each.head/00-dist.mk
@@ -13,8 +13,11 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+mod.dist.depends += files
+
 ifeq ($(outdir),$(topoutdir))
-std.clean_files += $(addprefix $(dist.pkgname)-*,$(dist.exts) .tar /)
+files.out.int += $(addprefix $(dist.pkgname)-*,$(dist.exts) .tar /) .tmp.$(dist.pkgname)-*/
 endif
 
 $(outdir)/dist: $(addprefix $(topoutdir)/$(dist.pkgname)-$(dist.version),$(dist.exts))
+.PHONY: $(outdir)/dist
diff --git a/build-aux/Makefile.each.head/00-files.mk b/build-aux/Makefile.each.head/00-files.mk
new file mode 100644
index 0000000000..7bf323e0c7
--- /dev/null
+++ b/build-aux/Makefile.each.head/00-files.mk
@@ -0,0 +1,29 @@
+# Copyright (C) 2015-2016  Luke Shumaker
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+files.src.src ?=
+files.src.int ?=
+files.src.cfg ?=
+files.src.gen ?=
+files.src = $(sort $(foreach _files.v,$(filter files.src.%,$(.VARIABLES)),$($(_files.v))))
+
+files.out.slow ?=
+files.out.int ?=
+files.out.cfg ?=
+$(foreach t,$(files.groups),$(eval files.out.$t ?=))
+files.out = $(sort $(foreach _files.v,$(filter files.out.%,$(.VARIABLES)),$($(_files.v))))
+
+$(foreach t,$(files.groups),$(eval files.sys.$t ?=))
+files.sys = $(sort $(foreach _files.v,$(filter files.sys.%,$(.VARIABLES)),$($(_files.v))))
diff --git a/build-aux/Makefile.each.head/00-nested.mk b/build-aux/Makefile.each.head/00-nested.mk
new file mode 100644
index 0000000000..4325825353
--- /dev/null
+++ b/build-aux/Makefile.each.head/00-nested.mk
@@ -0,0 +1,16 @@
+# Copyright (C) 2016  Luke Shumaker
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+nested.subdirs ?=
diff --git a/build-aux/Makefile.each.head/00-sd.mk b/build-aux/Makefile.each.head/00-sd.mk
new file mode 100644
index 0000000000..0dccebc138
--- /dev/null
+++ b/build-aux/Makefile.each.head/00-sd.mk
@@ -0,0 +1 @@
+sd.sed_files ?=
diff --git a/build-aux/Makefile.each.head/zz-mod.mk b/build-aux/Makefile.each.head/zz-mod.mk
new file mode 100644
index 0000000000..b83c2235a2
--- /dev/null
+++ b/build-aux/Makefile.each.head/zz-mod.mk
@@ -0,0 +1 @@
+_mod.each := $(sort $(_mod.each) $(filter-out $(_mod.once),$(_mod.vars)))
diff --git a/build-aux/Makefile.each.tail/10-files.mk b/build-aux/Makefile.each.tail/10-files.mk
new file mode 100644
index 0000000000..4607c433d0
--- /dev/null
+++ b/build-aux/Makefile.each.tail/10-files.mk
@@ -0,0 +1,55 @@
+# Copyright (C) 2015-2016  Luke Shumaker
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# Add some more defaults to the *_files variables
+
+$(foreach _files.var,$(patsubst files.%,%,files.src $(filter files.src.%,$(.VARIABLES))),\
+          $(eval _files.$(_files.var) = $$(call at.addprefix,$$(srcdir),$$(files.$(_files.var)))))
+$(foreach _files.var,$(patsubst files.%,%,files.out $(filter files.out.%,$(.VARIABLES))),\
+          $(eval _files.$(_files.var) = $$(call at.addprefix,$$(outdir),$$(files.$(_files.var)))))
+$(foreach _files.var,$(patsubst files.%,%,files.sys $(filter files.sys.%,$(.VARIABLES))),\
+          $(eval _files.$(_files.var) = $$(addprefix $$(DESTDIR),$$(files.$(_files.var)))))
+
+_files.all = $(_files.src) $(_files.out) $(_files.sys)
+
+at.targets += $(subst *,%,$(_files.all))
+
+# Creative targets
+$(outdir)/$(files.generate): $(_files.src.gen) $(_files.src.cfg)
+$(outdir)/install: $(_files.sys.$(files.default))
+$(outdir)/installdirs: $(sort $(dir $(_files.sys)))
+$(foreach _files.g,$(files.groups),\
+          $(eval $$(outdir)/$(_files.g): $$(_files.out.$(_files.g))))
+$(foreach _files.g,$(filter-out $(files.default),$(files.groups)),\
+          $(eval $$(outdir)/install-$(_files.g): $$(_files.sys.$(_files.g))))
+
+# Destructive targets
+_files.uninstall   = $(_files.sys)
+_files.mostlyclean = $(filter-out $(_files.out.slow) $(_files.out.cfg),$(_files.out))
+_files.clean       = $(filter-out                    $(_files.out.cfg),$(_files.out))
+_files.distclean   =                                                   $(_files.out)
+$(addprefix $(outdir)/,uninstall mostlyclean clean distclean): %: %-hook
+	$(RM)    -- $(sort $(filter-out %/,$(_files.$(@F))))
+	$(RM) -r -- $(sort $(filter     %/,$(_files.$(@F))))
+	$(RMDIR_P) -- $(sort $(dir $(_files.$(@F))))
+_files.maintainer-clean   = $(filter-out $(_files.src.cfg) $(_files.src.src),$(_files.src))
+_files.$(files.vcsclean)  = $(filter-out                   $(_files.src.src),$(_files.src))
+$(addprefix $(outdir)/,maintainer-clean $(files.vcsclean)): $(outdir)/%: $(outdir)/distclean $(outdir)/%-hook
+	@echo 'This command is intended for maintainers to use; it'
+	@echo 'deletes files that may need special tools to rebuild.'
+	$(RM)    -- $(sort $(filter-out %/,$(_files.$(@F))))
+	$(RM) -r -- $(sort $(filter     %/,$(_files.$(@F))))
+	$(RMDIR_P) -- $(sort $(dir $(_files.$(@F))))
+$(foreach t,uninstall mostlyclean clean distclean maintainer-clean $(files.vcsclean), $(outdir)/$t-hook)::
+.PHONY: $(foreach t,uninstall mostlyclean clean distclean maintainer-clean $(files.vcsclean), $(outdir)/$t-hook)
diff --git a/build-aux/Makefile.each.tail/10-nested.mk b/build-aux/Makefile.each.tail/10-nested.mk
new file mode 100644
index 0000000000..e9d02ca5b0
--- /dev/null
+++ b/build-aux/Makefile.each.tail/10-nested.mk
@@ -0,0 +1,19 @@
+# Copyright (C) 2016  Luke Shumaker
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+$(addprefix $(outdir)/,$(nested.targets)): $(outdir)/%: $(addsuffix /%,$(call at.addprefix,$(outdir),$(nested.subdirs)))
+.PHONY: $(addprefix $(outdir)/,$(nested.targets))
+
+at.subdirs += $(nested.subdirs)
diff --git a/build-aux/Makefile.each.tail/10-std.mk b/build-aux/Makefile.each.tail/10-std.mk
deleted file mode 100644
index ca78f3cf8c..0000000000
--- a/build-aux/Makefile.each.tail/10-std.mk
+++ /dev/null
@@ -1,46 +0,0 @@
-# Copyright (C) 2015-2016  Luke Shumaker
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Affero General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Affero General Public License for more details.
-#
-# You should have received a copy of the GNU Affero General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-# Add some more defaults to the *_files variables
-std.clean_files += $(std.gen_files) $(std.cfg_files) $(std.out_files)
-
-# Fix each variable at its current value to avoid any weirdness
-$(foreach c,src gen cfg out sys clean slow,$(eval std.$c_files := $$(std.$c_files)))
-
-# Make each of the standard variables relative to the correct directory
-std.src_files   := $(call at.addprefix,$(srcdir)/,$(std.src_files))
-std.gen_files   := $(call at.addprefix,$(srcdir)/,$(std.gen_files))
-std.cfg_files   := $(call at.addprefix,$(outdir)/,$(std.cfg_files))
-std.out_files   := $(call at.addprefix,$(outdir)/,$(std.out_files))
-std.sys_files   :=         $(addprefix $(DESTDIR),$(std.sys_files))
-std.clean_files := $(call at.addprefix,$(outdir)/,$(std.clean_files))
-std.slow_files  := $(call at.addprefix,$(outdir)/,$(std.slow_files))
-
-# Creative targets
-$(outdir)/build      :        $(std.out_files)
-$(outdir)/install    :        $(std.sys_files)
-$(outdir)/installdirs: $(sort $(dir $(std.sys_files)))
-
-# Destructive targets
-_std.uninstall/$(outdir)        := $(std.sys_files)
-_std.mostlyclean/$(outdir)      := $(filter-out $(std.slow_files) $(std.cfg_files) $(std.gen_files) $(std.src_files),$(std.clean_files))
-_std.clean/$(outdir)            := $(filter-out                   $(std.cfg_files) $(std.gen_files) $(std.src_files),$(std.clean_files))
-_std.distclean/$(outdir)        := $(filter-out                                    $(std.gen_files) $(std.src_files),$(std.clean_files))
-_std.maintainer-clean/$(outdir) := $(filter-out                                                     $(std.src_files),$(std.clean_files))
-$(addprefix $(outdir)/,uninstall mostlyclean clean distclean maintainer-clean): %: %-hook
-	$(RM)    -- $(sort $(filter-out %/,$(_std.$(@F)/$(@D))))
-	$(RM) -r -- $(sort $(filter     %/,$(_std.$(@F)/$(@D))))
-	$(RMDIR_P) $(sort $(dir $(_std.$(@F)/$(@D)))) 2>/dev/null || $(TRUE)
-$(foreach t,uninstall mostlyclean clean distclean maintainer-clean, $(outdir)/$t-hook)::
-.PHONY: $(foreach t,uninstall mostlyclean clean distclean maintainer-clean, $(outdir)/$t-hook)
diff --git a/build-aux/Makefile.each.tail/20-systemd.mk b/build-aux/Makefile.each.tail/20-systemd.mk
deleted file mode 100644
index 1a65c000e2..0000000000
--- a/build-aux/Makefile.each.tail/20-systemd.mk
+++ /dev/null
@@ -1,99 +0,0 @@
-#  -*- Mode: makefile; indent-tabs-mode: t -*-
-#
-#  This file is part of systemd.
-#
-#  Copyright 2010-2012 Lennart Poettering
-#  Copyright 2010-2012 Kay Sievers
-#  Copyright 2013 Zbigniew Jędrzejewski-Szmek
-#  Copyright 2013 David Strauss
-#  Copyright 2016 Luke Shumaker
-#
-#  systemd is free software; you can redistribute it and/or modify it
-#  under the terms of the GNU Lesser General Public License as published by
-#  the Free Software Foundation; either version 2.1 of the License, or
-#  (at your option) any later version.
-#
-#  systemd is distributed in the hope that it will be useful, but
-#  WITHOUT ANY WARRANTY; without even the implied warranty of
-#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-#  Lesser General Public License for more details.
-#
-#  You should have received a copy of the GNU Lesser General Public License
-#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
-
--include $(wildcard $(outdir)/$(DEPDIR)/*.P*)
-
-std.clean_files += *.o *.lo *.so .deps/ .libs/
-std.clean_files += *-list.txt
-std.clean_files += *-from-name.gperf
-std.clean_files += *-from-name.h
-std.clean_files += *-to-name.h
-std.clean_files += *-gperf.c
-
-$(outdir)/%.o : $(srcdir)/%.c $(topoutdir)/config.h | $(outdir)/.deps; $(AM_V_CC)$(COMPILE)   -c -o $@ $<
-$(outdir)/%.o : $(outdir)/%.c $(topoutdir)/config.h | $(outdir)/.deps; $(AM_V_CC)$(COMPILE)   -c -o $@ $<
-$(outdir)/%.lo: $(srcdir)/%.c $(topoutdir)/config.h | $(outdir)/.deps; $(AM_V_CC)$(LTCOMPILE) -c -o $@ $<
-$(outdir)/%.lo: $(outdir)/%.c $(topoutdir)/config.h | $(outdir)/.deps; $(AM_V_CC)$(LTCOMPILE) -c -o $@ $<
-
-$(outdir)/.deps:
-	$(AM_V_at)$(MKDIR_P) $@
-
-_systemd.dups = $(sort $(foreach l,$1,$(if $(filter-out 1,$(words $(filter $l,$1))),$l)))
-_systemd.patsubst-all = $(if $1,$(call _systemd.patsubst-all,$(wordlist 2,$(words $1),$1),$2,$(patsubst $(firstword $1),$2,$3)),$3)
-_systemd.lt_libs = $(foreach l,$(filter %.la,$1), $l $(call _systemd.lt_libs,$($(notdir $l).DEPENDS)))
-_systemd.lt_filter = $(filter-out $(call _systemd.dups,$(call _systemd.lt_libs,$1)),$1)
-
-_systemd.rpath = $(dir $(patsubst $(DESTDIR)%,%,$(filter %/$(@F),$(std.sys_files/$(@D)))))
-_systemd.link_files = $(call _systemd.lt_filter,$(filter %.o %.lo %.la,$^)) $(call _systemd.patsubst-all,$(.LIBPATTERNS),-l%,$(filter $(.LIBPATTERNS),$(notdir $^)))
-$(outdir)/%.la:
-	@if test $(words $^) = 0; then echo 'Cannot link library with no dependencies: $@' >&2; exit 1; fi
-	$(AM_V_CCLD)$(LINK) $(if $(_systemd.rpath),-rpath $(_systemd.rpath)) $(_systemd.link_files)
-$(addprefix $(outdir)/,$(foreach d,$(am.bindirs),$($d_PROGRAMS))): $(outdir)/%:
-	@if test $(words $^) = 0; then echo 'Cannot link executable with no dependencies: $@' >&2; exit 1; fi
-	$(AM_V_CCLD)$(LINK) $(_systemd.link_files)
-
-_systemd.in_destdir = $(foreach f,$(std.sys_files),$(if $(filter $1,$(patsubst %/,%,$(dir $f))),$(DESTDIR)$f))
-
-define install_bindir
-$(call _systemd.in_destdir,$(bindir)): $(DESTDIR)$(bindir)/%: $(outdir)/%
-	@$(NORMAL_INSTALL)
-	$(AM_V_PROG)$(LIBTOOL) $(AM_V_lt) --tag=CC $(SYS_LIBTOOLFLAGS) --mode=install $(INSTALL_PROGRAM) $< $@
-endef
-$(foreach bindir,$(sort $(foreach d,$(am.bindirs),$($ddir))),$(eval $(value install_bindir)))
-
-define install_libdir
-$(call _systemd.in_destdir,$(libdir)): $(DESTDIR)$(libdir)/%.la: $(outdir)/%.la
-	@$(NORMAL_INSTALL)
-	$(AM_V_LIB)$(LIBTOOL) $(AM_V_lt) --tag=CC $(SYS_LIBTOOLFLAGS) --mode=install $(INSTALL) $< $@
-endef
-$(foreach libdir,$(sort $(foreach d,lib rootlib,$($ddir))),$(eval $(value install_libdir)))
-
-define install_datadir
-$(call _systemd.in_destdir,$(datadir)): $(DESTDIR)$(datadir)/%: $(outdir)/%
-	@$(NORMAL_INSTALL)
-	$(AM_V_DATA)$(INSTALL_DATA) $< $@
-endef
-$(foreach datadir,$(sort $(foreach d,pkgconfigdata pkgconfiglib bootlib,$($ddir))),$(eval $(value install_datadir)))
-
-$(outdir)/%-from-name.gperf: $(outdir)/%-list.txt
-	$(AM_V_at)$(MKDIR_P) $(dir $@)
-	$(AM_V_GEN)$(AWK) 'BEGIN{ print "struct $(notdir $*)_name { const char* name; int id; };"; print "%null-strings"; print "%%";} { printf "%s, %s\n", $$1, $$1 }' <$< >$@
-
-$(outdir)/%-from-name.h: $(outdir)/%-from-name.gperf
-	$(AM_V_at)$(MKDIR_P) $(dir $@)
-	$(AM_V_GPERF)$(GPERF) -L ANSI-C -t --ignore-case -N lookup_$(notdir $*) -H hash_$(notdir $*)_name -p -C <$< >$@
-
-$(addprefix $(outdir)/,$(systemd.sed_files)): $(outdir)/%: $(srcdir)/%.in
-	$(SED_PROCESS)
-
-#$(outdir)/%.sh: $(srcdir)/%.sh.in
-#	$(SED_PROCESS)
-#	$(AM_V_GEN)chmod +x $@
-
-$(outdir)/%.c: $(srcdir)/%.gperf
-	$(AM_V_GPERF)$(GPERF) < $< > $@
-$(outdir)/%.c: $(outdir)/%.gperf
-	$(AM_V_GPERF)$(GPERF) < $< > $@
-
-$(outdir)/%: $(srcdir)/%.m4 $(top_builddir)/config.status
-	$(AM_V_M4)$(M4) -P $(M4_DEFINES) < $< > $@
diff --git a/build-aux/Makefile.each.tail/30-automake2autothing.mk b/build-aux/Makefile.each.tail/30-automake2autothing.mk
deleted file mode 100644
index cd5cc4300d..0000000000
--- a/build-aux/Makefile.each.tail/30-automake2autothing.mk
+++ /dev/null
@@ -1,36 +0,0 @@
-std.out_files += $(noinst_LTLIBRARIES) $(lib_LTLIBRARIES)
-std.sys_files += $(addprefix $(libdir)/,$(lib_LTLIBRARIES))
-
-_programs =
-$(foreach d,$(am.bindirs),                                               \
-	$(eval _programs     += $($d_PROGRAMS)                          )\
-	$(eval std.sys_files += $(addprefix $($(d)dir)/,$($d_PROGRAMS)) ))
-_programs += $(noinst_PROGRAMS)
-std.out_files += $(_programs)
-
-std.out_files += $(notdir $(pkgconfiglib_DATA))
-std.sys_files += $(addprefix $(pkgconfiglibdir)/,$(notdir $(pkgconfiglib_DATA)))
-
-$(foreach n,$(call automake_name,$(std.out_files)),\
-  $(eval $n_SOURCES ?=)\
-  $(eval nodist_$n_SOURCES ?=)\
-  $(eval $n_CFLAGS ?=)\
-  $(eval $n_CPPFLAGS ?=)\
-  $(eval $n_LDFLAGS ?=)\
-  $(eval $n_LIBADD ?=)\
-  $(eval $n_LDADD ?=))
-$(foreach t,$(filter %.la,$(std.out_files)),                                                             \
-	$(eval $t.DEPENDS += $(call at.path,$(call automake_lo,$t) $(call automake_lib,$t,LIBADD))      )\
-	$(eval am.CPPFLAGS += $($(call automake_name,$t)_CPPFLAGS) $(call automake_cpp,$t,LIBADD)       )\
-	$(eval am.CFLAGS += $($(call automake_name,$t)_CFLAGS)                                          )\
-	$(eval $t: private ALL_LDFLAGS += $($(call automake_name,$t)_LDFLAGS)                           )\
-	$(eval $(outdir)/$t: $($t.DEPENDS)                                                              )\
-	$(eval at.depdirs += $(abspath $(sort $(dir $(filter-out -l% /%,$($t.DEPENDS)))))               ))
-$(foreach t,$(_programs),                                                                                \
-	$(eval $t.DEPENDS += $(call at.path,$(call automake_o,$t)  $(call automake_lib,$t,LDADD))       )\
-	$(eval am.CPPFLAGS += $($(call automake_name,$t)_CPPFLAGS) $(call automake_cpp,$t,LDADD)        )\
-	$(eval am.CFLAGS += $($(call automake_name,$t)_CFLAGS)                                          )\
-	$(eval $t: private ALL_LDFLAGS += $($(call automake_name,$t)_LDFLAGS)                           )\
-	$(eval $(outdir)/$t: $($t.DEPENDS)                                                              )\
-	$(eval at.depdirs += $(sort $(filter-out $(abspath $(srcdir)),                                   \
-                                                 $(abspath $(dir $(filter-out -l% /%,$($t.DEPENDS)))))) ))
diff --git a/build-aux/Makefile.each.tail/30-directory-info.mk b/build-aux/Makefile.each.tail/30-directory-info.mk
deleted file mode 100644
index 80f5e68c29..0000000000
--- a/build-aux/Makefile.each.tail/30-directory-info.mk
+++ /dev/null
@@ -1,4 +0,0 @@
-dir_variables = $(foreach v,$(filter-out _%,$(patsubst %/$(@D),%,$(filter %/$(@D),$(.VARIABLES)))),$(if $(findstring /,$v),, $v))
-$(outdir)/directory-info:
-	$(AM_V_at)printf '%s = «%s»\n' $(foreach v,$(dir_variables),$(if $($v/$(@D)),'$v' '$($v/$(@D))')) | sort | column -s= -o= -t
-.PHONY: $(outdir)/module-info
diff --git a/build-aux/Makefile.each.tail/50-sd.mk b/build-aux/Makefile.each.tail/50-sd.mk
new file mode 100644
index 0000000000..832247ef72
--- /dev/null
+++ b/build-aux/Makefile.each.tail/50-sd.mk
@@ -0,0 +1,85 @@
+#  -*- Mode: makefile; indent-tabs-mode: t -*-
+#
+#  This file is part of systemd.
+#
+#  Copyright 2010-2012 Lennart Poettering
+#  Copyright 2010-2012 Kay Sievers
+#  Copyright 2013 Zbigniew Jędrzejewski-Szmek
+#  Copyright 2013 David Strauss
+#  Copyright 2016 Luke Shumaker
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+#  systemd is distributed in the hope that it will be useful, but
+#  WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public License
+#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+
+mod.sd.depends += files am lt
+
+-include $(wildcard $(outdir)/$(DEPDIR)/*.P*)
+
+files.out.int += *.o *.lo *.so .deps/ .libs/
+files.out.int += *-list.txt
+files.out.int += *-from-name.gperf
+files.out.int += *-from-name.h
+files.out.int += *-to-name.h
+files.out.int += *-gperf.c
+
+$(outdir)/%.o : $(srcdir)/%.c $(topoutdir)/config.h | $(outdir)/$(DEPDIR); $(AM_V_CC)$(sd.COMPILE)   -c -o $@ $<
+$(outdir)/%.o : $(outdir)/%.c $(topoutdir)/config.h | $(outdir)/$(DEPDIR); $(AM_V_CC)$(sd.COMPILE)   -c -o $@ $<
+$(outdir)/%.lo: $(srcdir)/%.c $(topoutdir)/config.h | $(outdir)/$(DEPDIR); $(AM_V_CC)$(sd.LTCOMPILE) -c -o $@ $<
+$(outdir)/%.lo: $(outdir)/%.c $(topoutdir)/config.h | $(outdir)/$(DEPDIR); $(AM_V_CC)$(sd.LTCOMPILE) -c -o $@ $<
+
+$(outdir)/$(DEPDIR):
+	$(AM_V_at)$(MKDIR_P) $@
+
+$(outdir)/%.la:
+	@if test $(words $(lt.link_files)) = 0; then echo 'Cannot link library with no dependencies: $@' >&2; exit 1; fi
+	$(AM_V_CCLD)$(sd.LINK) $(if $(lt.rpath),-rpath $(lt.rpath)) $(lt.link_files)
+$(addprefix $(outdir)/,$(am.PROGRAMS)): $(outdir)/%:
+	@if test $(words $(lt.link_files)) = 0; then echo 'Cannot link executable with no dependencies: $@' >&2; exit 1; fi
+	$(AM_V_CCLD)$(sd.LINK) $(lt.link_files)
+
+# Stupid test that everything purported to be exported really is
+$(outdir)/test-lib%-sym.c: lib%.sym
+	$(AM_V_GEN){\
+		printf '#include <stdio.h>\n' && \
+		printf '#include "%s"\n' $(notdir $(filter %.h, $^)) && \
+		printf 'void* functions[] = {\n' && \
+		sed -r -n 's/^ +([a-zA-Z0-9_]+);/\1,/p' $< && \
+		printf '};\nint main(void) {\n' && \
+		printf 'unsigned i; for (i=0;i<sizeof(functions)/sizeof(void*);i++) printf("%%p\\n", functions[i]);\n' && \
+		printf 'return 0; }\n' && \
+	:; } > $@
+
+_sd.files_in = $(foreach f,$(files.sys),$(if $(filter $1,$(patsubst %/,%,$(dir $f))),$(DESTDIR)$f))
+
+$(outdir)/%-from-name.gperf: $(outdir)/%-list.txt
+	$(AM_V_GEN)$(AWK) 'BEGIN{ print "struct $(notdir $*)_name { const char* name; int id; };"; print "%null-strings"; print "%%";} { printf "%s, %s\n", $$1, $$1 }' <$< >$@
+
+$(outdir)/%-from-name.h: $(outdir)/%-from-name.gperf
+	$(AM_V_GPERF)$(GPERF) -L ANSI-C -t --ignore-case -N lookup_$(notdir $*) -H hash_$(notdir $*)_name -p -C <$< >$@
+
+ifneq ($(sd.sed_files),)
+$(addprefix $(outdir)/,$(sd.sed_files)): $(outdir)/%: $(srcdir)/%.in
+	$(sd.SED_PROCESS)
+endif
+
+#$(outdir)/%.sh: $(srcdir)/%.sh.in
+#	$(SED_PROCESS)
+#	$(AM_V_GEN)chmod +x $@
+
+$(outdir)/%.c: $(srcdir)/%.gperf
+	$(AM_V_GPERF)$(GPERF) < $< > $@
+$(outdir)/%.c: $(outdir)/%.gperf
+	$(AM_V_GPERF)$(GPERF) < $< > $@
+
+$(outdir)/%: $(srcdir)/%.m4 $(top_builddir)/config.status
+	$(AM_V_M4)$(M4) -P $(M4_DEFINES) < $< > $@
diff --git a/build-aux/Makefile.each.tail/60-am.mk b/build-aux/Makefile.each.tail/60-am.mk
new file mode 100644
index 0000000000..ac8785d6ee
--- /dev/null
+++ b/build-aux/Makefile.each.tail/60-am.mk
@@ -0,0 +1,64 @@
+mod.am.depends += files
+
+########################################################################
+_am.primary2dirs = $(filter $(patsubst %dir,%,$(filter %dir,$(.VARIABLES))),\
+                            $(patsubst %_$1,%,$(filter %_$1,$(.VARIABLES))))
+define _am.per_primary
+noinst_$p ?=
+check_$p ?=
+
+am.inst_$p := $$(foreach d,$$(call _am.primary2dirs,$p),$$($$d_$p))
+am.noinst_$p := $$(noinst_$p)
+am.check_$p := $$(check_$p)
+$(foreach d,$(call _am.primary2dirs,$p) nointt check,undefine $d_$p$(at.nl))
+ifneq ($$(am.inst_$p),)
+$$(am.inst_$p): private am.INSTALL = $$(am.INSTALL_$p)
+endif
+am.$p = $$(am.check_$p) $$(am.noinst_$p) $$(call am.inst2noinst_$p,$$(am.inst_$p))
+endef
+$(foreach p,$(am.primaries),$(eval $(_am.per_primary)))
+########################################################################
+files.sys.all += $(foreach p,$(am.primaries),$(am.inst_$p))
+files.out.all += $(foreach p,$(am.primaries),$(am.noinst_$p))
+files.out.all += $(foreach p,$(am.primaries),$(call am.inst2noinst_$p,$(am.inst_$p)))
+files.out.check += $(foreach p,$(am.primaries),$(am.check_$p))
+########################################################################
+# TODO: I'm not in love with how _am.per_PROGRAM figures out at.subdirs
+define _am.per_PROGRAM
+$$(foreach var,_am.depends $$(call am.var_PROGRAMS,$v),$$(eval $$(var) ?=))
+_am.depends += $$(call at.path,$$(call am.file2.o,$f)  $$(call am.file2lib,$f,LDADD))
+am.CPPFLAGS +=                 $$($v_CPPFLAGS)         $$(call am.file2cpp,$f,LDADD)
+am.CFLAGS   +=                 $$($v_CFLAGS)
+$$(outdir)/$f: private ALL_LDFLAGS += $$($v_LDFLAGS)
+$$(outdir)/$f: $$(_am.depends)
+am.subdirs := $$(sort $$(am.subdirs)\
+                      $$(filter-out $$(abspath $$(srcdir)),\
+                                    $$(abspath $$(dir $$(filter-out -l% /%,$$(_am.depends))))))
+$$(foreach var,_am.depends $$(call am.var_PROGRAMS,$v),$$(eval undefine $$(var)))
+endef
+$(foreach f,$(am.PROGRAMS),$(foreach v,$(call am.file2var,$f),$(eval $(_am.per_PROGRAM))))
+########################################################################
+# TODO: I'm not in love with how _am.per_LTLIBRARY figures out at.subdirs
+define _am.per_LTLIBRARY
+$$(foreach var,_am.depends $$(call am.var_LTLIBRARIES,$v),$$(eval $$(var) ?=))
+_am.depends += $$(call at.path,$$(call am.file2.lo,$f) $$(call am.file2lib,$f,LIBADD))
+am.CPPFLAGS +=                 $$($v_CPPFLAGS)         $$(call am.file2cpp,$f,LIBADD)
+am.CFLAGS   +=                 $$($v_CFLAGS)
+$$(outdir)/$f: private ALL_LDFLAGS += $$($v_LDFLAGS)
+$$(outdir)/$f: $$(_am.depends)
+am.subdirs := $$(sort $$(am.subdirs)\
+                      $$(filter-out $$(abspath $$(srcdir)),\
+                                    $$(abspath $$(dir $$(filter-out -l% /%,$$(_am.depends))))))
+$$(foreach var,_am.depends $$(call am.var_LTLIBRARIES,$v),$$(eval undefine $$(var)))
+endef
+$(foreach f,$(am.LTLIBRARIES),$(foreach v,$(call am.file2var,$f),$(eval $(_am.per_LTLIBRARY))))
+########################################################################
+define _am.per_directory
+$$(DESTDIR)$d/%: $$(outdir)/%
+	@$$(NORMAL_INSTALL)
+	$$(am.INSTALL)
+$$(DESTDIR)$d/%: $$(srcdir)/%
+	@$$(NORMAL_INSTALL)
+	$$(am.INSTALL)
+endef
+$(foreach d,$(sort $(dir $(foreach p,$(am.primaries),$(am.inst_$p)))),$(eval $(_am.per_directory)))
diff --git a/build-aux/Makefile.head.mk b/build-aux/Makefile.head.mk
index 36c2c0a2e8..8213043c79 100644
--- a/build-aux/Makefile.head.mk
+++ b/build-aux/Makefile.head.mk
@@ -12,60 +12,103 @@
 #
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+_at.MAKEFILE_LIST ?=
+_at.MAKEFILE_LIST := $(strip $(_at.MAKEFILE_LIST) $(abspath $(lastword $(filter-out %.mk,$(MAKEFILE_LIST)))))
 
 # This bit only gets evaluated once, at the very beginning
 ifeq ($(origin _at.NO_ONCE),undefined)
 
+# Internal functions ###################################################
+
+# These 4 functions are all $(call _at.func,parent,child)
+_at.is_strict_subdir  = $(filter $(abspath $1)/%,$(abspath $2))
+_at.is_subdir         = $(filter $(abspath $1)/%,$(abspath $2)/.)
+_at.relbase = $(strip                                 \
+  $(if $(call _at.is_subdir,$1,$2),                   \
+       $(patsubst $(abspath $1)/%,%,$(abspath $2)/.), \
+       $(abspath $2)))
+_at.relto = $(strip                                   \
+  $(if $(call _at.is_subdir,$1,$2),                   \
+       $(patsubst $(abspath $1)/%,%,$(abspath $2)/.), \
+       ../$(call _at.relto,$(dir $1),$2)))
+
+# These 3 functions only take one operand; we define public multi-operand
+# versions below.
+_at.path = $(strip                                                            \
+  $(if $(call _at.is_subdir,$(topoutdir),$1),                                 \
+       $(patsubst %/.,%,$(topoutdir)/$(call _at.relto,.,$1)),                 \
+       $(if $(call _at.is_subdir,$(topsrcdir),$1),                            \
+            $(patsubst %/.,%,$(topsrcdir)/$(call _at.relto,$(topsrcdir),$1)), \
+            $(abspath $1))))
+_at.out2src = $(call _at.path,$(if $(call _at.is_subdir,$(topoutdir),$1),$(topsrcdir)/$(call _at.path,$1),$1))
+_at.addprefix = $(call _at.path,$(if $(filter-out /%,$2),$1/$2,$2))
+
+_at.rest = $(wordlist 2,$(words $1),$1)
+_at.reverse = $(if $1,$(call _at.reverse,$(_at.rest))) $(firstword $1)
+
+# Sanity checking ######################################################
+ifeq ($(filter undefine,$(.FEATURES)),)
+$(error Autothing: We need a version of Make that supports 'undefine')
+endif
 ifeq ($(topsrcdir),)
-$(error topsrcdir must be set before including Makefile.head.mk)
+$(error Autothing: topsrcdir must be set (and non-empty) before including Makefile.head.mk)
 endif
 ifeq ($(topoutdir),)
-$(error topoutdir must be set before including Makefile.head.mk)
+$(error Autothing: topoutdir must be set (and non-empty) before including Makefile.head.mk)
 endif
+ifneq ($(call _at.is_strict_subdir,$(topoutdir),$(topsrcdir)),)
+$(error Autothing: topsrcdir=$(topsrcdir) must not be a subdirectory of topoutdir=$(topoutdir))
+endif
+
+# Internal setup #######################################################
 
-_at.noslash = $(patsubst %/.,%,$(patsubst %/,%,$1))
-# These are all $(call _at.func,parent,child)
-#at.relto = $(if $2,$(shell realpath -sm --relative-to='$1' $2))
-_at.is_subdir = $(filter $(abspath $1)/%,$(abspath $2)/.)
-_at.relto_helper = $(if $(call _at.is_subdir,$1,$2),$(patsubst $1/%,%,$(addsuffix /.,$2)),$(addprefix ../,$(call _at.relto_helper,$(patsubst %/,%,$(dir $1)),$2)))
-_at.relto = $(call _at.noslash,$(call _at.relto_helper,$(call _at.noslash,$(abspath $1)),$(call _at.noslash,$(abspath $2))))
-at.relto = $(foreach p,$2,$(call _at.relto,$1,$p))
-# Note that _at.is_subdir says that a directory is a subdirectory of
-# itself.
-at.path = $(call at.relto,.,$1)
+# External provisions ##################################################
 
-_at.addprefix = $(if $(filter /%,$2),$2,$1/$2)
-at.addprefix = $(foreach f,$2, $(addsuffix $(if $(filter %/,$f),/),$(call at.path,$(call _at.addprefix,$1,$f)) ))
+# These 4 functions are all $(call _at.func,parent,child)
+at.is_subdir = $(_at.is_subdir)
+at.is_strict_subdir = $(_at.is_strict_subdir)
+#at.relbase = $(if $2,$(shell realpath -sm --relative-base=$1 -- $2))
+at.relbase = $(foreach _at.tmp,$2,$(call _at.relbase,$1,$(_at.tmp)))
+#at.relto   = $(if $2,$(shell realpath -sm --relative-to=$1   -- $2))
+at.relto   = $(foreach _at.tmp,$2,$(call _at.relto,$1,$(_at.tmp)))
+
+at.path    = $(foreach _at.tmp,$1,$(call _at.path,$(_at.tmp)))
+at.out2src = $(foreach _at.tmp,$1,$(call _at.out2src,$(_at.tmp)))
+at.addprefix = $(foreach _at.tmp,$2,$(call _at.addprefix,$1,$(_at.tmp)))
 
 define at.nl
 
 
 endef
 
+# External configuration ###############################################
 at.Makefile ?= Makefile
 
-_at.rest = $(wordlist 2,$(words $1),$1)
-_at.reverse = $(if $1,$(call _at.reverse,$(_at.rest))) $(firstword $1)
-
-at.dirlocal += at.subdirs
-at.dirlocal += at.depdirs
-
-_at.outdirs ?=
-_at.included_makefiles ?=
-
+# Include modules ######################################################
 include $(sort $(wildcard $(topsrcdir)/build-aux/Makefile.once.head/*.mk))
+_at.tmp_targets =
+_at.tmp_subdirs =
+_at.VARIABLES =
+_at.VARIABLES := $(.VARIABLES)
 
 endif # _at.NO_ONCE
 
 # This bit gets evaluated for each Makefile
 
-## Set outdir and srcdir (assumes that topoutdir and topsrcdir are
-## already set)
-outdir := $(call at.path,$(dir $(lastword $(filter-out %.mk,$(MAKEFILE_LIST)))))
-srcdir := $(call at.path,$(topsrcdir)/$(call _at.relto,$(topoutdir),$(outdir)))
+outdir := $(call _at.path,$(dir $(lastword $(_at.MAKEFILE_LIST))))
+ifeq ($(call _at.is_subdir,$(topoutdir),$(outdir)),)
+$(error Autothing: not a subdirectory of topoutdir=$(topoutdir): $(outdir))
+endif
 
-_at.included_makefiles := $(_at.included_makefiles) $(call at.path,$(outdir)/$(at.Makefile))
+# Don't use at.out2src because we *know* that $(outdir) is inside $(topoutdir),
+# and has already had $(_at.path) called on it.
+srcdir := $(call _at.path,$(topsrcdir)/$(outdir))
+ifeq ($(call _at.is_subdir,$(topsrcdir),$(srcdir)),)
+$(error Autothing: not a subdirectory of topsrcdir=$(topsrcdir): $(srcdir))
+endif
 
-$(foreach v,$(at.dirlocal),$(eval $v=))
+at.subdirs =
+at.targets =
 
 include $(sort $(wildcard $(topsrcdir)/build-aux/Makefile.each.head/*.mk))
diff --git a/build-aux/Makefile.once.head/00-write-ifchanged.mk b/build-aux/Makefile.once.head/00-write-ifchanged.mk
deleted file mode 100644
index 79ef1c419c..0000000000
--- a/build-aux/Makefile.once.head/00-write-ifchanged.mk
+++ /dev/null
@@ -1 +0,0 @@
-WRITE_IFCHANGED = $(topsrcdir)/build-aux/write-ifchanged
diff --git a/build-aux/Makefile.once.head/00-dist.mk b/build-aux/Makefile.once.head/10-dist.mk
index 4326cde72a..0e13ea2e28 100644
--- a/build-aux/Makefile.once.head/00-dist.mk
+++ b/build-aux/Makefile.once.head/10-dist.mk
@@ -13,6 +13,8 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+mod.dist.description = Make distribution tarballs
+
 # Developer configuration
 
 dist.exts ?= .tar.gz
@@ -20,10 +22,10 @@ dist.pkgname ?= $(firstword $(PACKAGE_TARNAME) $(PACKAGE) $(PACKAGE_NAME))
 dist.version ?= $(firstword $(PACKAGE_VERSION) $(VERSION))
 
 ifeq ($(dist.pkgname),)
-$(error dist.pkgname must be set)
+$(error Autothing module: dist: dist.pkgname must be set)
 endif
 ifeq ($(dist.version),)
-$(error dist.version must be set)
+$(error Autothing module: dist: dist.version must be set)
 endif
 
 # User configuration
@@ -38,7 +40,3 @@ TAR     ?= tar
 
 GZIPFLAGS ?= $(GZIP_ENV)
 GZIP_ENV ?= --best
-
-# Implementation
-
-at.phony += dist
diff --git a/build-aux/Makefile.once.head/10-std.mk b/build-aux/Makefile.once.head/10-files.mk
index 3e058eca57..56e06acc34 100644
--- a/build-aux/Makefile.once.head/10-std.mk
+++ b/build-aux/Makefile.once.head/10-files.mk
@@ -13,27 +13,25 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-# Declare the default target
-all: build
-.PHONY: all noop
+mod.files.description = Keeping track of groups of files
+mod.files.depends += nested
+
+files.groups ?= all
+files.default ?= all
+files.vcsclean ?= files.vcsclean
+files.generate ?= files.generate
+
+.DEFAULT_GOAL = $(files.default_group)
 
 # Standard creative PHONY targets
-at.phony += build install installdirs
+nested.targets += $(foreach g,$(files.groups), $g install-$g install-$gdirs)
 # Standard destructive PHONY targets
-at.phony += uninstall mostlyclean clean distclean maintainer-clean
-
-at.dirlocal += std.src_files
-at.dirlocal += std.gen_files
-at.dirlocal += std.cfg_files
-at.dirlocal += std.out_files
-at.dirlocal += std.sys_files
-at.dirlocal += std.clean_files
-at.dirlocal += std.slow_files
+nested.targets += uninstall mostlyclean clean distclean maintainer-clean
 
 # User configuration
 
 DESTDIR ?=
 
 RM      ?= rm -f
-RMDIR_P ?= rmdir -p
+RMDIR_P ?= rmdir -p --ignore-fail-on-non-empty
 TRUE    ?= true
diff --git a/build-aux/Makefile.once.head/00-gnuconf.mk b/build-aux/Makefile.once.head/10-gnuconf.mk
index 83cb110c59..c07cfb5cf3 100644
--- a/build-aux/Makefile.once.head/00-gnuconf.mk
+++ b/build-aux/Makefile.once.head/10-gnuconf.mk
@@ -14,11 +14,13 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 # This file is based on §7.2 "Makefile Conventions" of the release of
-# the GNU Coding Standards dated April 13, 2016.
+# the GNU Coding Standards dated July 25, 2016.
+
+mod.gnuconf.description = GNU standard configuration variables
 
 gnuconf.pkgname ?= $(firstword $(PACKAGE_TARNAME) $(PACKAGE) $(PACKAGE_NAME))
 ifeq ($(gnuconf.pkgname),)
-$(error gnuconf.pkgname must be set)
+$(error Autothing module: gnuconf: gnuconf.pkgname must be set)
 endif
 
 # 7.2.2: Utilities in Makefiles
@@ -54,43 +56,69 @@ TOUCH ?= touch
 TR ?= tr
 TRUE ?= true
 
-# These must be user-configurable
+# 7.2.2: Utilities in Makefiles/7.2.3: Variables for Specifying Commands
+# ----------------------------------------------------------------------
+
+# Standard user-configurable programs.
+#
+# The list of programs here is specified in §7.2.2, but the associated FLAGS
+# variables are specified in §7.2.3.  I found it cleaner to list them together.
 AR ?= ar
 ARFLAGS ?=
 BISON ?= bison
 BISONFLAGS ?=
 CC ?= cc
-CCFLAGS ?= $(CFLAGS)
+CFLAGS ?= # CFLAGS instead of CCFLAGS
 FLEX ?= flex
 FLEXFLAGS ?=
 INSTALL ?= install
-#INSTALLFLAGS ?=
+# There is no INSTALLFLAGS[0]
 LD ?= ld
 LDFLAGS ?=
-LDCONFIG ?= ldconfig #TODO
+LDCONFIG ?= ldconfig # TODO[1]
 LDCONFIGFLAGS ?=
 LEX ?= lex
-LEXFLAGS ?= $(LFLAGS)
+LFLAGS ?= # LFLAGS instead of LEXFLAGS
 #MAKE
 MAKEINFO ?= makeinfo
 MAKEINFOFLAGS ?=
-RANLIB ?= ranlib #TODO
+RANLIB ?= ranlib # TODO[1]
 RANLIBFLAGS ?=
 TEXI2DVI ?= texi2dvi
 TEXI2DVIFLAGS ?=
 YACC ?= yacc
-YACCFLAGS ?= $(YFLAGS)
+YFLAGS ?= # YFLAGS instead of YACCFLAGS
 
-CFLAGS ?=
-LFLAGS ?=
-YFLAGS ?=
-
-LN_S ?= ln -s #TODO
+LN_S ?= ln -s # TODO[2]
 
 CHGRP ?= chgrp
+CHGRPFLAGS ?=
 CHMOD ?= chmod
+CHMODFLAGS ?=
 CHOWN ?= chown
+CHOWNFLAGS ?=
 MKNOD ?= mknod
+MKNODFLAGS ?=
+
+# [0]: There is no INSTALLFLAGS because it would be inconsistent with how the
+#      standards otherwise recommend using $(INSTALL); with INSTALL_PROGRAM and
+#      INSTALL_DATA; which are specified in a way precluding the use of
+#      INSTALLFLAGS.  To have the variable, but to ignore it in the common case
+#      would be confusing.
+#
+# [1]: The RANLIB and LDCONFIG variables need some extra smarts; §7.2.2 says:
+#
+#       > When you use ranlib or ldconfig, you should make sure nothing bad
+#       > happens if the system does not have the program in question. Arrange
+#       > to ignore an error from that command, and print a message before the
+#       > command to tell the user that failure of this command does not mean a
+#       > problem. (The Autoconf ‘AC_PROG_RANLIB’ macro can help with this.)
+#
+# [2]: The LN_S variable isn't standard, but we have it here as an (incomplete)
+#      stub to help support this bit of §7.2.2:
+#
+#       > If you use symbolic links, you should implement a fallback for
+#       > systems that don’t have symbolic links.
 
 # 7.2.3: Variables for Specifying Commands
 # ----------------------------------------
diff --git a/build-aux/Makefile.once.head/10-lt.mk b/build-aux/Makefile.once.head/10-lt.mk
new file mode 100644
index 0000000000..c8410d4e38
--- /dev/null
+++ b/build-aux/Makefile.once.head/10-lt.mk
@@ -0,0 +1,12 @@
+mod.lt.description = Easy handling of libtool dependencies
+mod.lt.deps += files
+
+_lt.dups = $(sort $(foreach l,$1,$(if $(filter-out 1,$(words $(filter $l,$1))),$l)))
+_lt.patsubst-all = $(if $1,$(call _sd.patsubst-all,$(wordlist 2,$(words $1),$1),$2,$(patsubst $(firstword $1),$2,$3)),$3)
+_lt.unLIBPATTERNS = $(foreach _lt.tmp,$1,$(if $(filter $(.LIBPATTERNS),$(_lt.tmp)),$(call _lt.patsubst-all,$(.LIBPATTERNS),-l%,$(_lt.tmp)),$(_lt.tmp)))
+
+# The semantics for the de-dup bit are a bit weird.  My head hurts thinking
+# about them.  TODO: clarify/simplify/something
+lt.rpath = $(dir $(patsubst $(DESTDIR)%,%,$(filter %/$(@F),$(files.sys))))
+_lt.link_files = $(filter %.o %.lo %.la -l%,$(call _lt.unLIBPATTERNS$,$^))
+lt.link_files = $(filter-out $(call _lt.dups,$(_lt.link_files)),$(_lt.link_files))
diff --git a/build-aux/Makefile.once.head/10-nested.mk b/build-aux/Makefile.once.head/10-nested.mk
new file mode 100644
index 0000000000..af9fdf7d8a
--- /dev/null
+++ b/build-aux/Makefile.once.head/10-nested.mk
@@ -0,0 +1,18 @@
+# Copyright (C) 2016  Luke Shumaker
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+mod.nested.description = Easy nested .PHONY targets
+
+nested.targets ?=
diff --git a/build-aux/Makefile.once.head/10-write-ifchanged.mk b/build-aux/Makefile.once.head/10-write-ifchanged.mk
new file mode 100644
index 0000000000..7917201159
--- /dev/null
+++ b/build-aux/Makefile.once.head/10-write-ifchanged.mk
@@ -0,0 +1,3 @@
+mod.write-ifchanged.description = build-aux/write-ifchanged helper script
+
+WRITE_IFCHANGED ?= $(topsrcdir)/build-aux/write-ifchanged
diff --git a/build-aux/Makefile.once.head/20-sd.mk b/build-aux/Makefile.once.head/20-sd.mk
new file mode 100644
index 0000000000..c8462f285c
--- /dev/null
+++ b/build-aux/Makefile.once.head/20-sd.mk
@@ -0,0 +1,217 @@
+#  -*- Mode: makefile; indent-tabs-mode: t -*-
+#
+#  This file is part of systemd.
+#
+#  Copyright 2010-2012 Lennart Poettering
+#  Copyright 2010-2012 Kay Sievers
+#  Copyright 2013 Zbigniew Jędrzejewski-Szmek
+#  Copyright 2013 David Strauss
+#  Copyright 2016 Luke Shumaker
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+#  systemd is distributed in the hope that it will be useful, but
+#  WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public License
+#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+
+mod.sd.description = systemd build rules
+mod.sd.depends += am
+
+TESTS ?=
+
+# Make behavior
+SHELL = bash -o pipefail
+
+.DELETE_ON_ERROR:
+.SECONDARY:
+
+# Autoconf
+OUR_CPPFLAGS += -MT $@ -MD -MP -MF $(@D)/$(DEPDIR)/$(basename $(@F)).P$(patsubst .%,%,$(suffix $(@F)))
+OUR_CPPFLAGS += -include $(topoutdir)/config.h
+OUR_CPPFLAGS += $(sort -I$(@D) $(if $(<D),-I$(<D) -I$(call at.out2src,$(<D))))
+
+# 
+sd.ALL_CFLAGS       = $(OUR_CFLAGS)       $(am.CFLAGS)       $(sd.CFLAGS)       $(CFLAGS)
+sd.ALL_CPPFLAGS     = $(OUR_CPPFLAGS)     $(am.CPPFLAGS)     $(sd.CPPFLAGS)     $(CPPFLAGS)
+sd.ALL_LDFLAGS      = $(OUR_LDFLAGS)      $(am.LDFLAGS)      $(sd.LDFLAGS)      $(LDFLAGS)
+sd.ALL_LIBTOOLFLAGS = $(OUR_LIBTOOLFLAGS) $(am.LIBTOOLFLAGS) $(sd.LIBTOOLFLAGS) $(LIBTOOLFLAGS)
+
+sd.COMPILE   = $(CC) $(sd.ALL_CPPFLAGS) $(sd.ALL_CFLAGS)
+sd.LTCOMPILE = $(LIBTOOL) $(AM_V_lt) --tag=CC $(sd.ALL_LIBTOOLFLAGS) --mode=compile $(CC) $(sd.ALL_CPPFLAGS) $(sd.ALL_CFLAGS)
+sd.LINK      = $(LIBTOOL) $(AM_V_lt) --tag=CC $(sd.ALL_LIBTOOLFLAGS) --mode=link $(CCLD) $(sd.ALL_CFLAGS) $(sd.ALL_LDFLAGS) -o $@
+
+am.INSTALL_PROGRAM   = $(AM_V_PROG)$(LIBTOOL) $(AM_V_lt) --tag=CC $(sd.ALL_LIBTOOLFLAGS) --mode=install $(INSTALL_PROGRAM) $< $@
+am.INSTALL_SCRIPT    = $(AM_V_SCRIPT)$(INSTALL_SCRIPT) $< $@
+am.INSTALL_LTLIBRARY = $(AM_V_LIB)$(LIBTOOL) $(AM_V_lt) --tag=CC $(sd.ALL_LIBTOOLFLAGS) --mode=install $(INSTALL) $< $@
+am.INSTALL_DATA      = $(AM_V_DATA)$(INSTALL_DATA) $< $@
+
+CC ?= c99
+CCLD ?= c99
+LIBTOOL ?= libtool
+
+V ?=
+
+AM_V_M4 ?= $(AM_V_M4_$(V))
+AM_V_M4_ ?= $(AM_V_M4_$(AM_DEFAULT_VERBOSITY))
+AM_V_M4_0 ?= @echo "  M4      " $@;
+AM_V_M4_1 ?=
+
+AM_V_XSLT ?= $(AM_V_XSLT_$(V))
+AM_V_XSLT_ ?= $(AM_V_XSLT_$(AM_DEFAULT_VERBOSITY))
+AM_V_XSLT_0 ?= @echo "  XSLT    " $@;
+AM_V_XSLT_1 ?=
+
+AM_V_GPERF ?= $(AM_V_GPERF_$(V))
+AM_V_GPERF_ ?= $(AM_V_GPERF_$(AM_DEFAULT_VERBOSITY))
+AM_V_GPERF_0 ?= @echo "  GPERF   " $@;
+AM_V_GPERF_1 ?=
+
+AM_V_LN ?= $(AM_V_LN_$(V))
+AM_V_LN_ ?= $(AM_V_LN_$(AM_DEFAULT_VERBOSITY))
+AM_V_LN_0 ?= @echo "  LN      " $@;
+AM_V_LN_1 ?=
+
+AM_V_RM ?= $(AM_V_RM_$(V))
+AM_V_RM_ ?= $(AM_V_RM_$(AM_DEFAULT_VERBOSITY))
+AM_V_RM_0 ?= @echo "  RM      " $@;
+AM_V_RM_1 ?=
+
+AM_V_CC ?= $(AM_V_CC_$(V))
+AM_V_CC_ ?= $(AM_V_CC_$(AM_DEFAULT_VERBOSITY))
+AM_V_CC_0 ?= @echo "  CC      " $@;
+AM_V_CC_1 ?=
+
+AM_V_CCLD ?= $(AM_V_CCLD_$(V))
+AM_V_CCLD_ ?= $(AM_V_CCLD_$(AM_DEFAULT_VERBOSITY))
+AM_V_CCLD_0 ?= @echo "  CCLD    " $@;
+AM_V_CCLD_1 ?=
+
+AM_V_EFI_CC ?= $(AM_V_EFI_CC_$(V))
+AM_V_EFI_CC_ ?= $(AM_V_EFI_CC_$(AM_DEFAULT_VERBOSITY))
+AM_V_EFI_CC_0 ?= @echo "  EFI_CC  " $@;
+AM_V_EFI_CC_1 ?=
+
+AM_V_EFI_CCLD ?= $(AM_V_EFI_CCLD_$(V))
+AM_V_EFI_CCLD_ ?= $(AM_V_EFI_CCLD_$(AM_DEFAULT_VERBOSITY))
+AM_V_EFI_CCLD_0 ?= @echo "  EFI_CCLD" $@;
+AM_V_EFI_CCLD_1 ?=
+
+AM_V_P ?= $(AM_V_P_$(V))
+AM_V_P_ ?= $(AM_V_P_$(AM_DEFAULT_VERBOSITY))
+AM_V_P_0 ?= false
+AM_V_P_1 ?= :
+
+AM_V_GEN ?= $(AM_V_GEN_$(V))
+AM_V_GEN_ ?= $(AM_V_GEN_$(AM_DEFAULT_VERBOSITY))
+AM_V_GEN_0 ?= @echo "  GEN     " $@;
+AM_V_GEN_1 ?=
+
+AM_V_DATA ?= $(AM_V_DATA_$(V))
+AM_V_DATA_ ?= $(AM_V_DATA_$(AM_DEFAULT_VERBOSITY))
+AM_V_DATA_0 ?= @echo "  DATA    " $@;
+AM_V_DATA_1 ?=
+
+AM_V_PROG ?= $(AM_V_PROG_$(V))
+AM_V_PROG_ ?= $(AM_V_PROG_$(AM_DEFAULT_VERBOSITY))
+AM_V_PROG_0 ?= @echo "  PROG    " $@;
+AM_V_PROG_1 ?=
+
+AM_V_SCRIPT ?= $(AM_V_SCRIPT_$(V))
+AM_V_SCRIPT_ ?= $(AM_V_SCRIPT_$(AM_DEFAULT_VERBOSITY))
+AM_V_SCRIPT_0 ?= @echo "  SCRIPT    " $@;
+AM_V_SCRIPT_1 ?=
+
+AM_V_LIB ?= $(AM_V_LIB_$(V))
+AM_V_LIB_ ?= $(AM_V_LIB_$(AM_DEFAULT_VERBOSITY))
+AM_V_LIB_0 ?= @echo "  LIB     " $@;
+AM_V_LIB_1 ?=
+
+AM_V_at ?= $(AM_V_at_$(V))
+AM_V_at_ ?= $(AM_V_at_$(AM_DEFAULT_VERBOSITY))
+AM_V_at_0 ?= @
+AM_V_at_1 ?=
+
+AM_V_lt ?= $(AM_V_lt_$(V))
+AM_V_lt_ ?= $(AM_V_lt_$(AM_DEFAULT_VERBOSITY))
+AM_V_lt_0 ?= --silent
+AM_V_lt_1 ?=
+
+INTLTOOL_V_MERGE ?= $(INTLTOOL_V_MERGE_$(V))
+INTLTOOL_V_MERGE_OPTIONS ?= $(intltool_v_merge_options_$(V))
+INTLTOOL_V_MERGE_ ?= $(INTLTOOL_V_MERGE_$(AM_DEFAULT_VERBOSITY))
+INTLTOOL_V_MERGE_0 ?= @echo "  ITMRG " $@;
+INTLTOOL_V_MERGE_1 ?=
+
+sd.substitutions = \
+       '|rootlibexecdir=$(rootlibexecdir)|' \
+       '|rootbindir=$(rootbindir)|' \
+       '|bindir=$(bindir)|' \
+       '|SYSTEMCTL=$(rootbindir)/systemctl|' \
+       '|SYSTEMD_NOTIFY=$(rootbindir)/systemd-notify|' \
+       '|pkgsysconfdir=$(pkgsysconfdir)|' \
+       '|SYSTEM_CONFIG_UNIT_PATH=$(pkgsysconfdir)/system|' \
+       '|USER_CONFIG_UNIT_PATH=$(pkgsysconfdir)/user|' \
+       '|pkgdatadir=$(pkgdatadir)|' \
+       '|systemunitdir=$(systemunitdir)|' \
+       '|userunitdir=$(userunitdir)|' \
+       '|systempresetdir=$(systempresetdir)|' \
+       '|userpresetdir=$(userpresetdir)|' \
+       '|udevhwdbdir=$(udevhwdbdir)|' \
+       '|udevrulesdir=$(udevrulesdir)|' \
+       '|catalogdir=$(catalogdir)|' \
+       '|tmpfilesdir=$(tmpfilesdir)|' \
+       '|sysusersdir=$(sysusersdir)|' \
+       '|sysctldir=$(sysctldir)|' \
+       '|systemgeneratordir=$(systemgeneratordir)|' \
+       '|usergeneratordir=$(usergeneratordir)|' \
+       '|CERTIFICATEROOT=$(CERTIFICATEROOT)|' \
+       '|PACKAGE_VERSION=$(PACKAGE_VERSION)|' \
+       '|PACKAGE_NAME=$(PACKAGE_NAME)|' \
+       '|PACKAGE_URL=$(PACKAGE_URL)|' \
+       '|RANDOM_SEED_DIR=$(localstatedir)/lib/systemd/|' \
+       '|RANDOM_SEED=$(localstatedir)/lib/systemd/random-seed|' \
+       '|prefix=$(prefix)|' \
+       '|exec_prefix=$(exec_prefix)|' \
+       '|libdir=$(libdir)|' \
+       '|includedir=$(includedir)|' \
+       '|VERSION=$(VERSION)|' \
+       '|rootprefix=$(rootprefix)|' \
+       '|udevlibexecdir=$(udevlibexecdir)|' \
+       '|SUSHELL=$(SUSHELL)|' \
+       '|SULOGIN=$(SULOGIN)|' \
+       '|DEBUGTTY=$(DEBUGTTY)|' \
+       '|KILL=$(KILL)|' \
+       '|KMOD=$(KMOD)|' \
+       '|MOUNT_PATH=$(MOUNT_PATH)|' \
+       '|UMOUNT_PATH=$(UMOUNT_PATH)|' \
+       '|MKDIR_P=$(MKDIR_P)|' \
+       '|QUOTAON=$(QUOTAON)|' \
+       '|QUOTACHECK=$(QUOTACHECK)|' \
+       '|SYSTEM_SYSVINIT_PATH=$(sysvinitdir)|' \
+       '|VARLOGDIR=$(varlogdir)|' \
+       '|RC_LOCAL_SCRIPT_PATH_START=$(RC_LOCAL_SCRIPT_PATH_START)|' \
+       '|RC_LOCAL_SCRIPT_PATH_STOP=$(RC_LOCAL_SCRIPT_PATH_STOP)|' \
+       '|PYTHON=$(PYTHON)|' \
+       '|NTP_SERVERS=$(NTP_SERVERS)|' \
+       '|DNS_SERVERS=$(DNS_SERVERS)|' \
+       '|DEFAULT_DNSSEC_MODE=$(DEFAULT_DNSSEC_MODE)|' \
+       '|KILL_USER_PROCESSES=$(KILL_USER_PROCESSES)|' \
+       '|systemuidmax=$(SYSTEM_UID_MAX)|' \
+       '|systemgidmax=$(SYSTEM_GID_MAX)|' \
+       '|TTY_GID=$(TTY_GID)|' \
+       '|systemsleepdir=$(systemsleepdir)|' \
+       '|systemshutdowndir=$(systemshutdowndir)|' \
+       '|binfmtdir=$(binfmtdir)|' \
+       '|modulesloaddir=$(modulesloaddir)|'
+
+sd.SED_PROCESS = \
+	$(AM_V_GEN)$(MKDIR_P) $(dir $@) && \
+	$(SED) $(subst '|,-e 's|@,$(subst =,\@|,$(subst |',|g',$(sd.substitutions)))) \
+		< $< > $@
diff --git a/build-aux/Makefile.once.head/20-systemd.mk b/build-aux/Makefile.once.head/20-systemd.mk
deleted file mode 100644
index 04627a9497..0000000000
--- a/build-aux/Makefile.once.head/20-systemd.mk
+++ /dev/null
@@ -1,220 +0,0 @@
-#  -*- Mode: makefile; indent-tabs-mode: t -*-
-#
-#  This file is part of systemd.
-#
-#  Copyright 2010-2012 Lennart Poettering
-#  Copyright 2010-2012 Kay Sievers
-#  Copyright 2013 Zbigniew Jędrzejewski-Szmek
-#  Copyright 2013 David Strauss
-#  Copyright 2016 Luke Shumaker
-#
-#  systemd is free software; you can redistribute it and/or modify it
-#  under the terms of the GNU Lesser General Public License as published by
-#  the Free Software Foundation; either version 2.1 of the License, or
-#  (at your option) any later version.
-#
-#  systemd is distributed in the hope that it will be useful, but
-#  WITHOUT ANY WARRANTY; without even the implied warranty of
-#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-#  Lesser General Public License for more details.
-#
-#  You should have received a copy of the GNU Lesser General Public License
-#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
-
-TESTS ?=
-
-
-SHELL = bash -o pipefail
-
-OUR_CPPFLAGS += -MT $@ -MD -MP -MF $(@D)/$(DEPDIR)/$(basename $(@F)).P$(patsubst .%,%,$(suffix $(@F)))
-OUR_CPPFLAGS += -include $(topoutdir)/config.h
-OUR_CPPFLAGS += $(sort $(if $(<D),-I$(<D)) \
-                       $(if $(filter $(abspath $(topoutdir))/%,$(abspath $<)),-I$(call at.path,$(dir $(patsubst $(abspath $(topoutdir))/%,$(abspath $(topsrcdir))/%,$(abspath $<))))) \
-                       -I$(@D) )
-
-at.dirlocal += systemd.CFLAGS systemd.CPPFLAGS systemd.LDFLAGS systemd.LIBTOOLFLAGS
-ALL_CFLAGS       = $(OUR_CFLAGS)       $(am.CFLAGS/$(@D))       $(systemd.CFLAGS/$(@D))       $(CFLAGS)
-ALL_CPPFLAGS     = $(OUR_CPPFLAGS)     $(am.CPPFLAGS/$(@D))     $(systemd.CPPFLAGS/$(@D))     $(CPPFLAGS)
-ALL_LDFLAGS      = $(OUR_LDFLAGS)      $(am.LDFLAGS/$(@D))      $(systemd.LDFLAGS/$(@D))      $(LDFLAGS)
-ALL_LIBTOOLFLAGS = $(OUR_LIBTOOLFLAGS) $(am.LIBTOOLFLAGS/$(@D)) $(systemd.LIBTOOLFLAGS/$(@D)) $(LIBTOOLFLAGS)
-
-SYS_CFLAGS       = $(OUR_CFLAGS)       $(am.CFLAGS/$(<D))       $(systemd.CFLAGS/$(<D))       $(CFLAGS)
-SYS_CPPFLAGS     = $(OUR_CPPFLAGS)     $(am.CPPFLAGS/$(<D))     $(systemd.CPPFLAGS/$(<D))     $(CPPFLAGS)
-SYS_LDFLAGS      = $(OUR_LDFLAGS)      $(am.LDFLAGS/$(<D))      $(systemd.LDFLAGS/$(<D))      $(LDFLAGS)
-SYS_LIBTOOLFLAGS = $(OUR_LIBTOOLFLAGS) $(am.LIBTOOLFLAGS/$(<D)) $(systemd.LIBTOOLFLAGS/$(<D)) $(LIBTOOLFLAGS)
-
-COMPILE   = $(CC) $(ALL_CPPFLAGS) $(ALL_CFLAGS)
-LTCOMPILE = $(LIBTOOL) $(AM_V_lt) --tag=CC $(ALL_LIBTOOLFLAGS) --mode=compile $(CC) $(ALL_CPPFLAGS) $(ALL_CFLAGS)
-LINK      = $(LIBTOOL) $(AM_V_lt) --tag=CC $(ALL_LIBTOOLFLAGS) --mode=link $(CCLD) $(ALL_CFLAGS) $(ALL_LDFLAGS) -o $@
-
-.DELETE_ON_ERROR:
-.SECONDARY:
-
-V ?=
-
-AM_V_M4 = $(AM_V_M4_$(V))
-AM_V_M4_ = $(AM_V_M4_$(AM_DEFAULT_VERBOSITY))
-AM_V_M4_0 = @echo "  M4      " $@;
-AM_V_M4_1 =
-
-AM_V_XSLT = $(AM_V_XSLT_$(V))
-AM_V_XSLT_ = $(AM_V_XSLT_$(AM_DEFAULT_VERBOSITY))
-AM_V_XSLT_0 = @echo "  XSLT    " $@;
-AM_V_XSLT_1 =
-
-AM_V_GPERF = $(AM_V_GPERF_$(V))
-AM_V_GPERF_ = $(AM_V_GPERF_$(AM_DEFAULT_VERBOSITY))
-AM_V_GPERF_0 = @echo "  GPERF   " $@;
-AM_V_GPERF_1 =
-
-AM_V_LN = $(AM_V_LN_$(V))
-AM_V_LN_ = $(AM_V_LN_$(AM_DEFAULT_VERBOSITY))
-AM_V_LN_0 = @echo "  LN      " $@;
-AM_V_LN_1 =
-
-AM_V_RM = $(AM_V_RM_$(V))
-AM_V_RM_ = $(AM_V_RM_$(AM_DEFAULT_VERBOSITY))
-AM_V_RM_0 = @echo "  RM      " $@;
-AM_V_RM_1 =
-
-AM_V_CC = $(AM_V_CC_$(V))
-AM_V_CC_ = $(AM_V_CC_$(AM_DEFAULT_VERBOSITY))
-AM_V_CC_0 = @echo "  CC      " $@;
-AM_V_CC_1 =
-
-AM_V_CCLD = $(AM_V_CCLD_$(V))
-AM_V_CCLD_ = $(AM_V_CCLD_$(AM_DEFAULT_VERBOSITY))
-AM_V_CCLD_0 = @echo "  CCLD    " $@;
-AM_V_CCLD_1 =
-
-AM_V_EFI_CC = $(AM_V_EFI_CC_$(V))
-AM_V_EFI_CC_ = $(AM_V_EFI_CC_$(AM_DEFAULT_VERBOSITY))
-AM_V_EFI_CC_0 = @echo "  EFI_CC  " $@;
-AM_V_EFI_CC_1 =
-
-AM_V_EFI_CCLD = $(AM_V_EFI_CCLD_$(V))
-AM_V_EFI_CCLD_ = $(AM_V_EFI_CCLD_$(AM_DEFAULT_VERBOSITY))
-AM_V_EFI_CCLD_0 = @echo "  EFI_CCLD" $@;
-AM_V_EFI_CCLD_1 =
-
-AM_V_P = $(AM_V_P_$(V))
-AM_V_P_ = $(AM_V_P_$(AM_DEFAULT_VERBOSITY))
-AM_V_P_0 = false
-AM_V_P_1 = :
-
-AM_V_GEN = $(AM_V_GEN_$(V))
-AM_V_GEN_ = $(AM_V_GEN_$(AM_DEFAULT_VERBOSITY))
-AM_V_GEN_0 = @echo "  GEN     " $@;
-AM_V_GEN_1 =
-
-AM_V_DATA = $(AM_V_DATA_$(V))
-AM_V_DATA_ = $(AM_V_DATA_$(AM_DEFAULT_VERBOSITY))
-AM_V_DATA_0 = @echo "  DATA    " $@;
-AM_V_DATA_1 =
-
-AM_V_PROG = $(AM_V_PROG_$(V))
-AM_V_PROG_ = $(AM_V_PROG_$(AM_DEFAULT_VERBOSITY))
-AM_V_PROG_0 = @echo "  PROG    " $@;
-AM_V_PROG_1 =
-
-AM_V_LIB = $(AM_V_LIB_$(V))
-AM_V_LIB_ = $(AM_V_LIB_$(AM_DEFAULT_VERBOSITY))
-AM_V_LIB_0 = @echo "  LIB     " $@;
-AM_V_LIB_1 =
-
-AM_V_at = $(AM_V_at_$(V))
-AM_V_at_ = $(AM_V_at_$(AM_DEFAULT_VERBOSITY))
-AM_V_at_0 = @
-AM_V_at_1 =
-
-AM_V_lt = $(AM_V_lt_$(V))
-AM_V_lt_ = $(AM_V_lt_$(AM_DEFAULT_VERBOSITY))
-AM_V_lt_0 = --silent
-AM_V_lt_1 =
-
-INTLTOOL_V_MERGE = $(INTLTOOL_V_MERGE_$(V))
-INTLTOOL_V_MERGE_OPTIONS = $(intltool_v_merge_options_$(V))
-INTLTOOL_V_MERGE_ = $(INTLTOOL_V_MERGE_$(AM_DEFAULT_VERBOSITY))
-INTLTOOL_V_MERGE_0 = @echo "  ITMRG " $@;
-INTLTOOL_V_MERGE_1 =
-
-substitutions = \
-       '|rootlibexecdir=$(rootlibexecdir)|' \
-       '|rootbindir=$(rootbindir)|' \
-       '|bindir=$(bindir)|' \
-       '|SYSTEMCTL=$(rootbindir)/systemctl|' \
-       '|SYSTEMD_NOTIFY=$(rootbindir)/systemd-notify|' \
-       '|pkgsysconfdir=$(pkgsysconfdir)|' \
-       '|SYSTEM_CONFIG_UNIT_PATH=$(pkgsysconfdir)/system|' \
-       '|USER_CONFIG_UNIT_PATH=$(pkgsysconfdir)/user|' \
-       '|pkgdatadir=$(pkgdatadir)|' \
-       '|systemunitdir=$(systemunitdir)|' \
-       '|userunitdir=$(userunitdir)|' \
-       '|systempresetdir=$(systempresetdir)|' \
-       '|userpresetdir=$(userpresetdir)|' \
-       '|udevhwdbdir=$(udevhwdbdir)|' \
-       '|udevrulesdir=$(udevrulesdir)|' \
-       '|catalogdir=$(catalogdir)|' \
-       '|tmpfilesdir=$(tmpfilesdir)|' \
-       '|sysusersdir=$(sysusersdir)|' \
-       '|sysctldir=$(sysctldir)|' \
-       '|systemgeneratordir=$(systemgeneratordir)|' \
-       '|usergeneratordir=$(usergeneratordir)|' \
-       '|CERTIFICATEROOT=$(CERTIFICATEROOT)|' \
-       '|PACKAGE_VERSION=$(PACKAGE_VERSION)|' \
-       '|PACKAGE_NAME=$(PACKAGE_NAME)|' \
-       '|PACKAGE_URL=$(PACKAGE_URL)|' \
-       '|RANDOM_SEED_DIR=$(localstatedir)/lib/systemd/|' \
-       '|RANDOM_SEED=$(localstatedir)/lib/systemd/random-seed|' \
-       '|prefix=$(prefix)|' \
-       '|exec_prefix=$(exec_prefix)|' \
-       '|libdir=$(libdir)|' \
-       '|includedir=$(includedir)|' \
-       '|VERSION=$(VERSION)|' \
-       '|rootprefix=$(rootprefix)|' \
-       '|udevlibexecdir=$(udevlibexecdir)|' \
-       '|SUSHELL=$(SUSHELL)|' \
-       '|SULOGIN=$(SULOGIN)|' \
-       '|DEBUGTTY=$(DEBUGTTY)|' \
-       '|KILL=$(KILL)|' \
-       '|KMOD=$(KMOD)|' \
-       '|MOUNT_PATH=$(MOUNT_PATH)|' \
-       '|UMOUNT_PATH=$(UMOUNT_PATH)|' \
-       '|MKDIR_P=$(MKDIR_P)|' \
-       '|QUOTAON=$(QUOTAON)|' \
-       '|QUOTACHECK=$(QUOTACHECK)|' \
-       '|SYSTEM_SYSVINIT_PATH=$(sysvinitdir)|' \
-       '|VARLOGDIR=$(varlogdir)|' \
-       '|RC_LOCAL_SCRIPT_PATH_START=$(RC_LOCAL_SCRIPT_PATH_START)|' \
-       '|RC_LOCAL_SCRIPT_PATH_STOP=$(RC_LOCAL_SCRIPT_PATH_STOP)|' \
-       '|PYTHON=$(PYTHON)|' \
-       '|NTP_SERVERS=$(NTP_SERVERS)|' \
-       '|DNS_SERVERS=$(DNS_SERVERS)|' \
-       '|DEFAULT_DNSSEC_MODE=$(DEFAULT_DNSSEC_MODE)|' \
-       '|KILL_USER_PROCESSES=$(KILL_USER_PROCESSES)|' \
-       '|systemuidmax=$(SYSTEM_UID_MAX)|' \
-       '|systemgidmax=$(SYSTEM_GID_MAX)|' \
-       '|TTY_GID=$(TTY_GID)|' \
-       '|systemsleepdir=$(systemsleepdir)|' \
-       '|systemshutdowndir=$(systemshutdowndir)|' \
-       '|binfmtdir=$(binfmtdir)|' \
-       '|modulesloaddir=$(modulesloaddir)|'
-
-SED_PROCESS = \
-	$(AM_V_GEN)$(MKDIR_P) $(dir $@) && \
-	$(SED) $(subst '|,-e 's|@,$(subst =,\@|,$(subst |',|g',$(substitutions)))) \
-		< $< > $@
-
-# Stupid test that everything purported to be exported really is
-define generate-sym-test
-	$(AM_V_at)$(MKDIR_P) $(dir $@)
-	$(AM_V_at)printf '#include <stdio.h>\n' > $@
-	$(AM_V_at)printf '#include "%s"\n' $(notdir $(filter %.h, $^)) >> $@
-	$(AM_V_at)printf 'void* functions[] = {\n' >> $@
-	$(AM_V_GEN)sed -r -n 's/^ +([a-zA-Z0-9_]+);/\1,/p' $< >> $@
-	$(AM_V_at)printf '};\nint main(void) {\n' >> $@
-	$(AM_V_at)printf 'unsigned i; for (i=0;i<sizeof(functions)/sizeof(void*);i++) printf("%%p\\n", functions[i]);\n' >> $@
-	$(AM_V_at)printf 'return 0; }\n' >> $@
-endef
-
-at.dirlocal += systemd.sed_files
diff --git a/build-aux/Makefile.once.head/30-am.mk b/build-aux/Makefile.once.head/30-am.mk
new file mode 100644
index 0000000000..9049f2c88a
--- /dev/null
+++ b/build-aux/Makefile.once.head/30-am.mk
@@ -0,0 +1,28 @@
+mod.am.description = Support for Automake variables (systemd specific)
+mod.am.depends += gnuconf
+
+am.inst2noinst_DATA = $(notdir \
+        $(patsubst $(sysusersdir)/%.conf,%.sysusers,\
+        $(patsubst $(sysctldir)/%.conf,%.sysctl,\
+        $1)))
+am.var_PROGRAMS    = $1_SOURCES nodist_$1_SOURCES $1_CFLAGS $1_CPPFLAGS $1_LDFLAGS $1_LDADD
+am.var_LTLIBRARIES = $1_SOURCES nodist_$1_SOURCES $1_CFLAGS $1_CPPFLAGS $1_LDFLAGS $1_LIBADD
+
+am.INSTALL_PROGRAM   ?= $(INSTALL_PROGRAM) $< $@
+am.INSTALL_SCRIPT    ?= $(INSTALL) $< $@
+am.INSTALL_LTLIBRARY ?= $(INSTALL) $< $@
+am.INSTALL_DATA      ?= $(INSTALL_DATA) $< $@
+
+################################################################################
+
+# this list of primaries is based on the Automake 1.15 manual
+am.primaries ?= PROGRAMS LIBRARIES LTLIBRARIES LISP PYTHON JAVA SCRIPTS DATA HEADERS MANS TEXINFOS
+$(foreach p,$(am.primaries),$(eval am.inst2noinst_$p ?= $$(notdir $$1)))
+
+am.file2var = $(subst -,_,$(subst .,_,$1))
+am.file2sources  = $(addprefix $(srcdir)/,$(notdir $($(am.file2var)_SOURCES)))
+am.file2sources += $(addprefix $(outdir)/,$(notdir $(nodist_$(am.file2var)_SOURCES)))
+am.file2.o  = $(patsubst $(srcdir)/%,$(outdir)/%,$(patsubst %.c,%.o ,$(filter %.c,$(am.file2sources))))
+am.file2.lo = $(patsubst %.o,%.lo,$(am.file2.o))
+am.file2lib = $(foreach l,   $($(am.file2var)_$2),$(if $(filter lib%.la,$l), $($(l:.la=).DEPENDS)  , $l ))
+am.file2cpp = $(foreach l,$1 $($(am.file2var)_$2),$(if $(filter lib%.la,$l), $($(l:.la=).CPPFLAGS) ,    ))
diff --git a/build-aux/Makefile.once.head/30-automake2autothing.mk b/build-aux/Makefile.once.head/30-automake2autothing.mk
deleted file mode 100644
index ee21fba45a..0000000000
--- a/build-aux/Makefile.once.head/30-automake2autothing.mk
+++ /dev/null
@@ -1,11 +0,0 @@
-am.bindirs = bin rootbin libexec rootlibexec systemgenerator udevlibexec
-at.dirlocal += am.CFLAGS am.CPPFLAGS am.LDFLAGS am.LIBTOOLFLAGS
-at.dirlocal += noinst_LTLIBRARIES lib_LTLIBRARIES
-at.dirlocal += $(addsuffix _PROGRAMS,noinst $(am.bindirs))
-at.dirlocal += pkgconfiglib_DATA
-automake_name = $(subst -,_,$(subst .,_,$1))
-automake_sources = $(addprefix $(outdir)/,$(notdir $($(automake_name)_SOURCES) $(nodist_$(automake_name)_SOURCES)))
-automake_lo = $(patsubst %.c,%.lo,$(filter %.c,$(automake_sources)))
-automake_o = $(patsubst %.c,%.o,$(filter %.c,$(automake_sources)))
-automake_lib = $(foreach l,   $($(automake_name)_$2),$(if $(filter lib%.la,$l), $($(l:.la=).DEPENDS)  , $l ))
-automake_cpp = $(foreach l,$1 $($(automake_name)_$2),$(if $(filter lib%.la,$l), $($(l:.la=).CPPFLAGS) ,    ))
diff --git a/build-aux/Makefile.once.head/zz-mod.mk b/build-aux/Makefile.once.head/zz-mod.mk
new file mode 100644
index 0000000000..3bf6398e13
--- /dev/null
+++ b/build-aux/Makefile.once.head/zz-mod.mk
@@ -0,0 +1,24 @@
+# Copyright (C) 2016  Luke Shumaker
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+mod.mod.description = Print information about Autothing modules
+
+_mod.target = at-mod-info
+_mod.modules := $(sort $(patsubst %.mk,%,$(filter %.mk,$(subst -, ,$(notdir $(wildcard $(topsrcdir)/build-aux/Makefile.*/??-*.mk))))))
+_mod.quote = '$(subst ','\'',$1)'
+
+_mod.vars = $(filter $(addsuffix .%,$(_mod.modules)),$(.VARIABLES))
+_mod.once := $(_mod.vars)
+_mod.each :=
diff --git a/build-aux/Makefile.once.tail/00-dist.mk b/build-aux/Makefile.once.tail/00-dist.mk
index b8b7733319..6c6aaedbce 100644
--- a/build-aux/Makefile.once.tail/00-dist.mk
+++ b/build-aux/Makefile.once.tail/00-dist.mk
@@ -16,12 +16,12 @@
 _dist.copyfile = $(MKDIR_P) $(dir $2) && $(CP) -T $1 $2
 _dist.addfile = $(call _dist.copyfile,$3,$2/$(call at.relto,$1,$3))
 $(topoutdir)/$(dist.pkgname)-$(dist.version): $(foreach v,$(filter std.src_files/% std.gen_files/%,$(.VARIABLES)),$($v))
-	$(RM) -r $@ $(@D)/tmp.$(@F)
-	$(MKDIR) $(@D)/tmp.$(@F)
-	$(foreach f,$^,$(call _dist.addfile,$(topsrcdir),$(@D)/tmp.$(@F),$f)$(at.nl))
-	$(MV) $(@D)/tmp.$(@F) $@ || $(RM) -r $(@D)/tmp.$(@F)
+	$(RM) -r $@ $(@D)/.tmp.$(@F)
+	$(MKDIR) $(@D)/.tmp.$(@F)
+	$(foreach f,$^,$(call _dist.addfile,$(topsrcdir),$(@D)/.tmp.$(@F),$f)$(at.nl))
+	$(MV) $(@D)/.tmp.$(@F) $@ || $(RM) -r $(@D)/.tmp.$(@F)
 
-$(topoutdir)/$(dist.pkgname)-$(dist.version).tar: $(topoutdir)/$(dist.pkgname)-$(dist.version)
+$(topoutdir)/$(dist.pkgname)-$(dist.version).tar: %.tar: %
 	$(TAR) cf $@ -C $(<D) $(<F)
-$(topoutdir)/$(dist.pkgname)-$(dist.version).tar.gz: $(topoutdir)/$(dist.pkgname)-$(dist.version).tar
+$(topoutdir)/$(dist.pkgname)-$(dist.version).tar.gz: %.gz: %
 	$(GZIP) $(GZIPFLAGS) < $< > $@
diff --git a/build-aux/Makefile.once.tail/00-mod.mk b/build-aux/Makefile.once.tail/00-mod.mk
new file mode 100644
index 0000000000..68350f09ea
--- /dev/null
+++ b/build-aux/Makefile.once.tail/00-mod.mk
@@ -0,0 +1,32 @@
+# Copyright (C) 2016  Luke Shumaker
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+$(_mod.target):
+	@printf 'Autothing modules used in this project:\n'
+	@printf ' - %s\n' $(foreach _mod.tmp,$(_mod.modules),$(call _mod.quote,$(_mod.tmp)))
+$(addprefix $(_mod.target)/,$(_mod.modules)): $(_mod.target)/%:
+	@printf 'Module : %s ' $(call _mod.quote,$*)
+	@$(if $(at.mod.$*.description),printf ' - %s' $(call _mod.quote,mod.$*.description))
+	@echo
+	@echo Depends on : $(mod.$*.depends)
+	@echo User configuration:
+	@egrep '^\s*[^:#]+\s*\?=' $(topsrcdir)/build-aux/Makefile.once.head/??-$*.mk 2>/dev/null | sed 's|^\s*||;s|?=|:' | grep -v -e ^'_' -e ^'$*' | column -t -s: |sed 's|^|    |'
+	@echo Developer global inputs:
+	@egrep '^\s*[^:#]+\s*\?=' $(topsrcdir)/build-aux/Makefile.once.head/??-$*.mk 2>/dev/null | sed 's|^\s*||;s|?=|:' | grep ^'$*\.' | column -t -s: |sed 's|^|    |'
+	@echo Developer per-directory inputs:
+	@egrep '^\s*[^:#]+\s*\?=' $(topsrcdir)/build-aux/Makefile.each.head/??-$*.mk 2>/dev/null | sed 's|^\s*||;s|?=|:' | grep ^'$*\.' | column -t -s: |sed 's|^|    |'
+	@echo Developer outputs:
+	@egrep '^\s*[^:#]+\s*(|:|::)=' $(topsrcdir)/build-aux/Makefile.once.head/??-$*.mk 2>/dev/null | sed 's|^\s*||;s|?=|:' | grep ^'$*\.' | column -t -s: |sed 's|^|    |'
+.PHONY: $(addprefix mod/,$(_mod.modules))
diff --git a/build-aux/Makefile.once.tail/00-noop.mk b/build-aux/Makefile.once.tail/00-noop.mk
new file mode 100644
index 0000000000..bac2ec11dd
--- /dev/null
+++ b/build-aux/Makefile.once.tail/00-noop.mk
@@ -0,0 +1,2 @@
+noop:
+.PHONY: noop
diff --git a/build-aux/Makefile.once.tail/20-systemd.mk b/build-aux/Makefile.once.tail/10-sd.mk
index d4b63baad1..228d4d0db7 100644
--- a/build-aux/Makefile.once.tail/20-systemd.mk
+++ b/build-aux/Makefile.once.tail/10-sd.mk
@@ -21,9 +21,9 @@
 #  You should have received a copy of the GNU Lesser General Public License
 #  along with systemd; If not, see <http://www.gnu.org/licenses/>.
 
-autogen_files = aclocal.m4 automake.mk.in config.h.in configure po/Makefile.in.in
-# $*=% had better be $(topsrcdir), but we can't enforce that
-$(addprefix %/,$(autogen_files)): %/configure.ac %/autogen.sh
+_sd.autogen_files = aclocal.m4 automake.mk.in config.h.in configure po/Makefile.in.in
+# `$*`/`%` had better be $(topsrcdir), but we can't enforce that
+$(addprefix %/,$(_sd.autogen_files)): %/configure.ac %/autogen.sh
 	cd $(topsrcdir) && ./autogen.sh
 
 config_files = config.mk automake.mk autoconf.mk gnustandards.mk po/Makefile.in
@@ -51,21 +51,21 @@ valgrind-tests: $(TESTS)
 		x="\n\n"; \
 	done
 
-exported-%: %
-	$(AM_V_GEN)$(NM) -g --defined-only $(builddir)/.libs/$(<:.la=.so) 2>&1 /dev/null | grep " T " | cut -d" " -f3 > $@
-
-exported: $(addprefix exported-, $(lib_LTLIBRARIES))
-	$(AM_V_GEN)sort -u $^ > $@
-
-.PHONY: check-api-docs
-check-api-docs: exported man
-	$(AM_V_GEN)for symbol in `cat exported` ; do \
-		if test -f $(builddir)/man/$$symbol.html ; then \
-			echo "  Symbol $$symbol() is documented." ; \
-		else \
-			echo "‣ Symbol $$symbol() lacks documentation." ; \
-		fi ; \
-	done
+# exported-%: %
+# 	$(AM_V_GEN)$(NM) -g --defined-only $(builddir)/.libs/$(<:.la=.so) 2>&1 /dev/null | grep " T " | cut -d" " -f3 > $@
+
+# exported: $(addprefix exported-, $(lib_LTLIBRARIES))
+# 	$(AM_V_GEN)sort -u $^ > $@
+
+# .PHONY: check-api-docs
+# check-api-docs: exported man
+# 	$(AM_V_GEN)for symbol in `cat exported` ; do \
+# 		if test -f $(builddir)/man/$$symbol.html ; then \
+# 			echo "  Symbol $$symbol() is documented." ; \
+# 		else \
+# 			echo "‣ Symbol $$symbol() lacks documentation." ; \
+# 		fi ; \
+# 	done
 
 OBJECT_VARIABLES:=$(filter %_OBJECTS,$(.VARIABLES))
 ALL_OBJECTS:=$(foreach v,$(OBJECT_VARIABLES),$($(v)))
diff --git a/build-aux/Makefile.tail.mk b/build-aux/Makefile.tail.mk
index a8b3d8938f..136e483837 100644
--- a/build-aux/Makefile.tail.mk
+++ b/build-aux/Makefile.tail.mk
@@ -17,36 +17,26 @@
 
 include $(call _at.reverse,$(sort $(wildcard $(topsrcdir)/build-aux/Makefile.each.tail/*.mk)))
 
-# Move all of the dirlocal variables to their namespaced version
-$(foreach v,$(at.dirlocal),$(eval $v/$(outdir) := $$($v)))
-$(foreach v,$(at.dirlocal),$(eval undefine $v))
-
-# Adjust subdirs and depdirs to be relative to $(outdir)
-at.subdirs/$(outdir) := $(sort $(patsubst %/,%,$(call at.addprefix,$(outdir)/,$(at.subdirs/$(outdir)))))
-at.depdirs/$(outdir) := $(sort $(patsubst %/,%,$(call at.addprefix,$(outdir)/,$(at.depdirs/$(outdir)))))
-
-# Remember that this is a directory that we've visited
-_at.outdirs := $(_at.outdirs) $(outdir)
-
-# Generic phony target declarations:
-# mark them phony
-.PHONY: $(addprefix $(outdir)/,$(at.phony))
-# have them depend on subdirs
-$(foreach t,$(at.phony),$(eval $(outdir)/$t: $(addsuffix /$t,$(at.subdirs/$(outdir)))))
-
-# Include Makefiles from other directories
+_at.tmp_targets := $(at.targets)
+_at.tmp_subdirs := $(call at.addprefix,$(outdir),$(at.subdirs))
+
+# Clean the environment
+$(foreach _at.tmp_variable,$(filter-out _at.tmp_variable $(_at.VARIABLES),$(.VARIABLES)), \
+          $(foreach _at.tmp_target,$(_at.tmp_targets), \
+                    $(if $(filter recursive,$(flavor $(_at.tmp_variable))), \
+                         $(eval $(_at.tmp_target): private $(_at.tmp_variable)  = $(subst $(at.nl),$$(at.nl),$(value $(_at.tmp_variable)))), \
+                         $(eval $(_at.tmp_target): private $(_at.tmp_variable) := $$($(_at.tmp_variable))))) \
+          $(eval undefine $(_at.tmp_variable)))
+
+# Recurse
 $(foreach _at.NO_ONCE,y,\
-	$(foreach makefile,$(call at.path,$(addsuffix /$(at.Makefile),$(at.subdirs/$(outdir)) $(at.depdirs/$(outdir)))),\
-		$(eval include $(filter-out $(_at.included_makefiles),$(makefile)))))
+          $(foreach _at.tmp,$(call at.path,$(addsuffix /$(at.Makefile),$(_at.tmp_subdirs))),\
+                    $(if $(filter-out $(_at.MAKEFILE_LIST),$(abspath $(_at.tmp))),\
+                         $(eval include $(_at.tmp)))))
 
 # This bit only gets evaluated once, after all of the other Makefiles are read
 ifeq ($(origin _at.NO_ONCE),undefined)
 
-outdir = /bogus
-srcdir = /bogus
-
-$(foreach v,$(at.dirlocal),$(eval $v=))
-
 include $(call _at.reverse,$(sort $(wildcard $(topsrcdir)/build-aux/Makefile.once.tail/*.mk)))
 
 endif # _at.NO_ONCE
diff --git a/build-aux/no-builtin-variables.mk b/build-aux/no-builtin-variables.mk
deleted file mode 100644
index c3aef5874f..0000000000
--- a/build-aux/no-builtin-variables.mk
+++ /dev/null
@@ -1,15 +0,0 @@
-MAKEFLAGS += --no-builtin-variables
-
-# This version is more correct, but is slower:
-#   $(foreach v,$(shell bash -c 'comm -23 <(env -i $(MAKE) -f - <<<"\$$(info \$$(.VARIABLES))all:"|sed "s/ /\n/g"|sort) <(env -i $(MAKE) -R -f - <<<"\$$(info \$$(.VARIABLES))all:"|sed "s/ /\n/g"|sort)'),
-#     $(if $(filter default,$(origin $v)),$(eval undefine $v)))
-
-_default_variables = $(foreach v,$(.VARIABLES),$(if $(filter default,$(origin $v)),$v))
-$(foreach v,$(filter-out .% MAKE% SUFFIXES,$(_default_variables))\
-            $(filter .LIBPATTERNS MAKEINFO,$(_default_variables)),\
-  $(eval undefine $v))
-undefine _default_variables
-
-# Because Make uses .LIBPATTERNS internally, it should always be
-# defined in case --warn-undefined-variables
-.LIBPATTERNS ?=