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-rw-r--r--build-aux/Makefile.README.txt164
-rw-r--r--build-aux/Makefile.each.head/.gitignore0
-rw-r--r--build-aux/Makefile.each.tail/.gitignore0
-rw-r--r--build-aux/Makefile.each.tail/10-std.mk46
-rw-r--r--build-aux/Makefile.each.tail/20-systemd.mk73
-rw-r--r--build-aux/Makefile.head.mk63
-rw-r--r--build-aux/Makefile.once.head/.gitignore0
-rw-r--r--build-aux/Makefile.once.head/00-dist.mk4
-rw-r--r--build-aux/Makefile.once.head/00-gnuconf.mk160
-rw-r--r--build-aux/Makefile.once.head/00-write-ifchanged.mk1
-rw-r--r--build-aux/Makefile.once.head/10-std.mk39
-rw-r--r--build-aux/Makefile.once.head/20-systemd.mk230
-rw-r--r--build-aux/Makefile.once.tail/.gitignore0
-rw-r--r--build-aux/Makefile.once.tail/20-systemd.mk111
-rw-r--r--build-aux/Makefile.tail.mk51
-rw-r--r--build-aux/no-builtin-variables.mk15
-rwxr-xr-xbuild-aux/write-ifchanged25
17 files changed, 980 insertions, 2 deletions
diff --git a/build-aux/Makefile.README.txt b/build-aux/Makefile.README.txt
new file mode 100644
index 0000000000..e06ba523d4
--- /dev/null
+++ b/build-aux/Makefile.README.txt
@@ -0,0 +1,164 @@
+Luke's AutoMake
+===============
+
+Yo, this document is incomplete. It describes the magical
+automake.{head,tail}.mk Makefiles and how to use them, kinda.
+
+I wrote a "clone" of automake. I say clone, because it works
+differently. Yeah, I need a new name for it.
+
+High-level overview
+-------------------
+
+Now, what this does for you is:
+
+It makes it _easy_ to write non-recursive Makefiles--and ones that are
+similar to plain recursive Makefiles, at that! (search for the paper
+"Recursive Make Considered Harmful") As harmful as recursive make is,
+it's historically been difficult to to write non-recursive Makefiles.
+This makes it easy.
+
+It also makes it easy to follow the GNU standards for your makefiles:
+it takes care of this entire table of .PHONY targets for you:
+
+| this | and this | are aliases for this |
+|------+------------------+--------------------------------------------------------|
+| all | build | $(outdir)/build |
+| | install | $(outdir)/install |
+| | uninstall | $(outdir)/uninstall |
+| | mostlyclean | $(outdir)/mostlyclean |
+| | clean | $(outdir)/clean |
+| | distclean | $(outdir)/distclean |
+| | maintainer-clean | $(outdir)/maintainer-clean |
+| | check | $(outdir)/check (not implemented for you) |
+| | dist | $(topoutdir)/$(PACKAGE)-$(VERSION).tar.gz (not .PHONY) |
+
+(You are still responsible for implementing the `$(outdir)/check`
+target in each of your Makefiles.)
+
+What you have to do is:
+
+In each source directory, you write a `Makefile`, very similarly to if
+you were writing for plain GNU Make, with
+
+ topoutdir ?= ...
+ topsrcdir ?= ...
+ include $(topsrcdir)/build-aux/Makefile.head.mk
+
+ # your makefile
+
+ include $(topsrcdir)/build-aux/Makefile.tail.mk
+
+And in the top-level source directory, Write your own helper makefiles
+that get included:
+ - `common.once.head.mk`: before parsing any of your Makefiles
+ - `common.each.head.mk`: before parsing each of your Makefiles
+ - `common.each.tail.mk`: after parsing each of your Makefiles
+ - `common.each.tail.mk`: after parsing all of your Makefiles
+
+The `common.*.mk` makefiles are nice for including generic pattern
+rules and variables that aren't specific to a directory.
+
+You're probably thinking that this sounds too good to be true!
+Unfortunately, there are two major deviations from writing a plain
+recursive Makefile:
+
+ 1. all targets and prerequisites (including .PHONY targets!) need to
+ be prefixed with
+ `$(srcdir)`/`$(outdir)`/`$(topsrcdir)`/`$(topoutdir)`.
+ * sub-gotcha: this means that if a pattern rule has a
+ prerequisite that may be in srcdir or outdir, then it must be
+ specified twice, once for each case.
+ 2. if a prerequisite is in a directory "owned" by another Makefile,
+ you must filter the pathname through `am_path`:
+ `$(call am_path,YOUR_PATH)`. Further, that path must NOT contain
+ a `..` segment; if you need to refer to a sibling directory, do it
+ relative to `$(topoutdir)` or `$(topsrcdir)`.
+
+Telling automake about your program
+-----------------------------------
+
+You tell automake what to do for you by setting some variables. They
+are all prefixed with `am_`; this prefix may be changed by editing the
+`_am` variable at the top of `automake.head.mk`.
+
+The exception to this is the `am_path` variable, which is a macro that
+is used to make a list of filenames relative to the appropriate
+directory, because unlike normal GNU (Auto)Make, `$(outdir)` isn't
+nescessarily equal to `.`. See above.
+
+There are several commands that generate files; simply record the list
+of files that each command generates as the following variable
+variables:
+
+| Variable | Create Command | Delete Command | Description | Relative to |
+|--------------+----------------+-----------------------------+-----------------------------------+-------------|
+| am_src_files | emacs | rm -rf . | Files that the developer writes | srcdir |
+| am_gen_files | ??? | make maintainer-clean | Files the developer compiles | srcdir |
+| am_cfg_files | ./configure | make distclean | Users' compile-time configuration | outdir |
+| am_out_files | make all | make mostlyclean/make clean | Files the user compiles | outdir |
+| am_sys_files | make install | make uninstall | Files the user installs | DESTDIR |
+
+In addition, there are two more variables that control not how files
+are created, but how they are deleted:
+
+| Variable | Affected command | Description | Relative to |
+|----------------+------------------+------------------------------------------------+-------------|
+| am_clean_files | make clean | A list of things to `rm` in addition to the | outdir |
+| | | files in `$(am_out_files)`. (Example: `*.o`) | |
+|----------------+------------------+------------------------------------------------+-------------|
+| am_slow_files | make mostlyclean | A list of things that (as an exception) should | outdir |
+| | | _not_ be deleted. (otherwise, `mostlyclean` | |
+| | | is the same as `clean`) | |
+
+Finally, there are two variables that express the relationships
+between directories:
+
+| Variable | Description |
+|------------+---------------------------------------------------------|
+| am_subdirs | A list of other directories (containing Makefiles) that |
+| | may be considered "children" of this |
+| | directory/Makefile; building a phony target in this |
+| | directory should also build it in the subdirectory. |
+| | They are not necesarily actually subdirectories of this |
+| | directory in the filesystem. |
+|------------+---------------------------------------------------------|
+| am_depdirs | A list of other directories (containing Makefiles) that |
+| | contain or generate files that are dependencies of |
+| | targets in this directory. They are not necesarily |
+| | actually subdirectories of this directory in the |
+| | filesystem. Except for files that are dependencies of |
+| | files in this directory, things in the dependency |
+| | directory will not be built. |
+
+Tips, notes
+-----------
+
+I like to have the first (non-comment) line in a Makefile be:
+
+ include $(dir $(lastword $(MAKEFILE_LIST)))/../../config.mk
+
+(adjusting the number of `../` sequences as nescessary). Then, my
+(user-editable) `config.mk` is of the form:
+
+ ifeq ($(topsrcdir),)
+ topoutdir := $(patsubst %/,%,$(dir $(lastword $(MAKEFILE_LIST))))
+ topsrcdir := $(topoutdir)
+
+ # your configuration
+
+ endif
+
+If the package has a `./configure` script, then I have it modifiy
+topsrcdir as necessary, as well as modifying whatever other parts of
+the configuration. All of the configuration lives in `config.mk`;
+`./configure` doesn't modify any `Makefile`s, it just generates
+`config.mk`, and copies (or (sym?)link?) every `$(srcdir)/Makefile` to
+`$(outdir)/Makefile`.
+
+----
+Copyright (C) 2016 Luke Shumaker
+
+This documentation file is placed into the public domain. If that is
+not possible in your legal system, I grant you permission to use it in
+absolutely every way that I can legally grant to you.
diff --git a/build-aux/Makefile.each.head/.gitignore b/build-aux/Makefile.each.head/.gitignore
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/build-aux/Makefile.each.head/.gitignore
diff --git a/build-aux/Makefile.each.tail/.gitignore b/build-aux/Makefile.each.tail/.gitignore
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/build-aux/Makefile.each.tail/.gitignore
diff --git a/build-aux/Makefile.each.tail/10-std.mk b/build-aux/Makefile.each.tail/10-std.mk
new file mode 100644
index 0000000000..5150a71a72
--- /dev/null
+++ b/build-aux/Makefile.each.tail/10-std.mk
@@ -0,0 +1,46 @@
+# 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 := $(patsubst ./%,%,$(addprefix $(srcdir)/,$(std.src_files)))
+std.gen_files := $(patsubst ./%,%,$(addprefix $(srcdir)/,$(std.gen_files)))
+std.cfg_files := $(patsubst ./%,%,$(addprefix $(outdir)/,$(std.cfg_files)))
+std.out_files := $(patsubst ./%,%,$(addprefix $(outdir)/,$(std.out_files)))
+std.sys_files := $(addprefix $(DESTDIR),$(std.sys_files))
+std.clean_files := $(patsubst ./%,%,$(addprefix $(outdir)/,$(std.clean_files)))
+std.slow_files := $(patsubst ./%,%,$(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
new file mode 100644
index 0000000000..e70a71ce90
--- /dev/null
+++ b/build-aux/Makefile.each.tail/20-systemd.mk
@@ -0,0 +1,73 @@
+# -*- 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 $(outdir)/$(DEPDIR)/*.P*
+
+std.clean_files += *.o *.lo .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
+
+$(outdir)/%.o: $(srcdir)/%.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)/.deps:
+ $(AM_V_at)$(MKDIR_P) $@
+
+_systemd.rpath = $(dir $(patsubst $(DESTDIR)%,%,$(filter %/$(@F),$(std.sys_files/$(@D)))))
+_systemd.patsubst-all = $(if $1,$(call _systemd.patsubst-all,$(wordlist 2,$(words $1),$1),$2,$(patsubst $(firstword $1),$2,$3)),$3)
+_systemd.link_files = $(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)/,$(bin_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)
+
+$(DESTDIR)$(libdir)/%.la: $(outdir)/%.la
+ $(LIBTOOL) $(ALL_LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $< $(@D)
+
+$(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 <$< >$@
+
+$(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)/%: $(srcdir)/%.m4 $(top_builddir)/config.status
+ $(AM_V_M4)$(M4) -P $(M4_DEFINES) < $< > $@
diff --git a/build-aux/Makefile.head.mk b/build-aux/Makefile.head.mk
new file mode 100644
index 0000000000..63a34624f9
--- /dev/null
+++ b/build-aux/Makefile.head.mk
@@ -0,0 +1,63 @@
+# 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/>.
+
+# This bit only gets evaluated once, at the very beginning
+ifeq ($(_at.NO_ONCE),)
+
+ifeq ($(topsrcdir),)
+$(error topsrcdir must be set before including Makefile.head.mk)
+endif
+ifeq ($(topoutdir),)
+$(error topoutdir must be set before including Makefile.head.mk)
+endif
+
+_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)
+
+define at.nl
+
+
+endef
+
+_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
+
+include $(sort $(wildcard $(topsrcdir)/build-aux/Makefile.once.head/*.mk))
+
+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)))
+
+_at.included_makefiles := $(_at.included_makefiles) $(call at.path,$(outdir)/Makefile)
+
+$(foreach v,$(at.dirlocal),$(eval $v=))
+
+include $(sort $(wildcard $(topsrcdir)/build-aux/Makefile.each.head/*.mk))
diff --git a/build-aux/Makefile.once.head/.gitignore b/build-aux/Makefile.once.head/.gitignore
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/build-aux/Makefile.once.head/.gitignore
diff --git a/build-aux/Makefile.once.head/00-dist.mk b/build-aux/Makefile.once.head/00-dist.mk
index d5bfcd3d2f..4326cde72a 100644
--- a/build-aux/Makefile.once.head/00-dist.mk
+++ b/build-aux/Makefile.once.head/00-dist.mk
@@ -16,8 +16,8 @@
# Developer configuration
dist.exts ?= .tar.gz
-dist.pkgname ?= $(PACKAGE)
-dist.version ?= $(VERSION)
+dist.pkgname ?= $(firstword $(PACKAGE_TARNAME) $(PACKAGE) $(PACKAGE_NAME))
+dist.version ?= $(firstword $(PACKAGE_VERSION) $(VERSION))
ifeq ($(dist.pkgname),)
$(error dist.pkgname must be set)
diff --git a/build-aux/Makefile.once.head/00-gnuconf.mk b/build-aux/Makefile.once.head/00-gnuconf.mk
new file mode 100644
index 0000000000..83cb110c59
--- /dev/null
+++ b/build-aux/Makefile.once.head/00-gnuconf.mk
@@ -0,0 +1,160 @@
+# 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/>.
+
+# This file is based on §7.2 "Makefile Conventions" of the release of
+# the GNU Coding Standards dated April 13, 2016.
+
+gnuconf.pkgname ?= $(firstword $(PACKAGE_TARNAME) $(PACKAGE) $(PACKAGE_NAME))
+ifeq ($(gnuconf.pkgname),)
+$(error gnuconf.pkgname must be set)
+endif
+
+# 7.2.2: Utilities in Makefiles
+# -----------------------------
+
+# It's ok to hard-code these commands in rules, but who wants to
+# memorize the list of what's ok?
+AWK ?= awk
+CAT ?= cat
+CMP ?= cmp
+CP ?= cp
+DIFF ?= diff
+ECHO ?= echo
+EGREP ?= egrep
+EXPR ?= expr
+FALSE ?= false
+GREP ?= grep
+INSTALL_INFO ?= install-info
+LN ?= ln
+LS ?= ls
+MKDIR ?= mkdir
+MV ?= mv
+PRINTF ?= printf
+PWD ?= pwd
+RM ?= rm
+RMDIR ?= rmdir
+SED ?= sed
+SLEEP ?= sleep
+SORT ?= sort
+TAR ?= tar
+TEST ?= test
+TOUCH ?= touch
+TR ?= tr
+TRUE ?= true
+
+# These must be user-configurable
+AR ?= ar
+ARFLAGS ?=
+BISON ?= bison
+BISONFLAGS ?=
+CC ?= cc
+CCFLAGS ?= $(CFLAGS)
+FLEX ?= flex
+FLEXFLAGS ?=
+INSTALL ?= install
+#INSTALLFLAGS ?=
+LD ?= ld
+LDFLAGS ?=
+LDCONFIG ?= ldconfig #TODO
+LDCONFIGFLAGS ?=
+LEX ?= lex
+LEXFLAGS ?= $(LFLAGS)
+#MAKE
+MAKEINFO ?= makeinfo
+MAKEINFOFLAGS ?=
+RANLIB ?= ranlib #TODO
+RANLIBFLAGS ?=
+TEXI2DVI ?= texi2dvi
+TEXI2DVIFLAGS ?=
+YACC ?= yacc
+YACCFLAGS ?= $(YFLAGS)
+
+CFLAGS ?=
+LFLAGS ?=
+YFLAGS ?=
+
+LN_S ?= ln -s #TODO
+
+CHGRP ?= chgrp
+CHMOD ?= chmod
+CHOWN ?= chown
+MKNOD ?= mknod
+
+# 7.2.3: Variables for Specifying Commands
+# ----------------------------------------
+
+INSTALL_PROGRAM ?= $(INSTALL)
+INSTALL_DATA ?= ${INSTALL} -m 644
+
+# 7.2.5: Variables for Installation Directories
+# ---------------------------------------------
+
+# Root for the installation
+prefix ?= /usr/local
+exec_prefix ?= $(prefix)
+# Executable programs
+bindir ?= $(exec_prefix)/bin
+sbindir ?= $(exec_prefix)/sbin
+libexecdir ?= $(exec_prefix)/libexec
+# Data files
+datarootdir ?= $(prefix)/share
+datadir ?= $(datarootdir)
+sysconfdir ?= $(prefix)/etc
+sharedstatedir ?= $(prefix)/com
+localstatedir ?= $(prefix)/var
+runstatedir ?= $(localstatedir)/run
+# Specific types of files
+includedir ?= $(prefix)/include
+oldincludedir ?= /usr/include
+docdir ?= $(datarootdir)/doc/$(gnuconf.pkgname)
+infodir ?= $(datarootdir)/info
+htmldir ?= $(docdir)
+dvidir ?= $(docdir)
+pdfdir ?= $(docdir)
+psdir ?= $(docdir)
+libdir ?= $(exec_prefix)/lib
+lispdir ?= $(datarootdir)/emacs/site-lisp
+localedir ?= $(datarootdir)/locale
+
+mandir ?= $(datarootdir)/man
+man1dir ?= $(mandir)/man1
+man2dir ?= $(mandir)/man2
+man3dir ?= $(mandir)/man3
+man4dir ?= $(mandir)/man4
+man5dir ?= $(mandir)/man5
+man6dir ?= $(mandir)/man6
+man7dir ?= $(mandir)/man7
+man8dir ?= $(mandir)/man8
+
+manext ?= .1
+man1ext ?= .1
+man2ext ?= .2
+man3ext ?= .3
+man4ext ?= .4
+man5ext ?= .5
+man6ext ?= .6
+man7ext ?= .7
+man8ext ?= .8
+
+# 7.2.7: Install Command Categories
+# ---------------------------------
+
+PRE_INSTALL ?=
+POST_INSTALL ?=
+NORMAL_INSTALL ?=
+
+PRE_UNINSTALL ?=
+POST_UNINSTALL ?=
+NORMAL_UNINSTALL ?=
diff --git a/build-aux/Makefile.once.head/00-write-ifchanged.mk b/build-aux/Makefile.once.head/00-write-ifchanged.mk
new file mode 100644
index 0000000000..79ef1c419c
--- /dev/null
+++ b/build-aux/Makefile.once.head/00-write-ifchanged.mk
@@ -0,0 +1 @@
+WRITE_IFCHANGED = $(topsrcdir)/build-aux/write-ifchanged
diff --git a/build-aux/Makefile.once.head/10-std.mk b/build-aux/Makefile.once.head/10-std.mk
new file mode 100644
index 0000000000..3e058eca57
--- /dev/null
+++ b/build-aux/Makefile.once.head/10-std.mk
@@ -0,0 +1,39 @@
+# 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/>.
+
+# Declare the default target
+all: build
+.PHONY: all noop
+
+# Standard creative PHONY targets
+at.phony += build install installdirs
+# 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
+
+# User configuration
+
+DESTDIR ?=
+
+RM ?= rm -f
+RMDIR_P ?= rmdir -p
+TRUE ?= true
diff --git a/build-aux/Makefile.once.head/20-systemd.mk b/build-aux/Makefile.once.head/20-systemd.mk
new file mode 100644
index 0000000000..4b4c1b6187
--- /dev/null
+++ b/build-aux/Makefile.once.head/20-systemd.mk
@@ -0,0 +1,230 @@
+# -*- 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/>.
+
+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 += $(if $(<D),-I$(<D)) -I$(@D)
+
+at.dirlocal += AM_CFLAGS AM_CPPFLAGS AM_LDFLAGS AM_LIBTOOLFLAGS
+ALL_CFLAGS = $(OUR_CFLAGS) $(AM_CFLAGS/$(@D)) $(CFLAGS)
+ALL_CPPFLAGS = $(OUR_CPPFLAGS) $(AM_CPPFLAGS/$(@D)) $(CPPFLAGS)
+ALL_LDFLAGS = $(OUR_LDFLAGS) $(AM_LDFLAGS/$(@D)) $(LDFLAGS)
+ALL_LIBTOOLFLAGS = $(OUR_LIBTOOLFLAGS) $(AM_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 $@
+
+SED_PROCESS = \
+ $(AM_V_GEN)$(MKDIR_P) $(dir $@) && \
+ $(SED) $(subst '|,-e 's|@,$(subst =,\@|,$(subst |',|g',$(substitutions)))) \
+ < $< > $@
+
+# remove targets if the command fails
+.DELETE_ON_ERROR:
+
+# keep intermediate files
+.SECONDARY:
+
+# Keep the test-suite.log
+.PRECIOUS: $(TEST_SUITE_LOG) Makefile
+
+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_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_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 = \
+ '|libexecdir=$(libexecdir)|' \
+ '|bindir=$(bindir)|' \
+ '|bindir=$(bindir)|' \
+ '|SYSTEMCTL=$(bindir)/systemctl|' \
+ '|SYSTEMD_NOTIFY=$(bindir)/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)|' \
+ '|prefix=$(prefix)|' \
+ '|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)|' \
+ '|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 += noinst_LTLIBRARIES lib_LTLIBRARIES
+at.dirlocal += bin_PROGRAMS
+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_libs = $($(automake_name)_LIBADD) $($(automake_name)_LDADD)
+
+define automake2autothing
+std.out_files += $(noinst_LTLIBRARIES) $(lib_LTLIBRARIES)
+std.sys_files += $(addprefix $(libdir)/,$(lib_LTLIBRARIES))
+
+std.out_files += $(bin_PROGRAMS)
+std.sys_files += $(addprefix $(bindir)/,$(bin_PROGRAMS))
+
+std.out_files += $(notdir $(pkgconfiglib_DATA))
+std.sys_files += $(addprefix $(pkgconfiglibdir)/,$(notdir $(lib_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 ?=))
+$(foreach t,$(filter %.la,$(std.out_files)),\
+ $(eval $(outdir)/$t: $(call at.path,$(call automake_lo,$t) $(call automake_libs,$t)) )\
+ $(eval AM_CFLAGS += $($(call automake_name,$t)_CFLAGS) )\
+ $(eval AM_CPPFLAGS += $($(call automake_name,$t)_CPPFLAGS) )\
+ $(eval AM_LDFLAGS += $($(call automake_name,$t)_LDFLAGS) ))
+$(foreach t,$(bin_PROGRAMS),\
+ $(eval $(outdir)/$t: $(call at.path,$(call automake_o,$t) $(call automake_libs,$t)) )\
+ $(eval AM_CFLAGS += $($(call automake_name,$t)_CFLAGS) )\
+ $(eval AM_CPPFLAGS += $($(call automake_name,$t)_CPPFLAGS) )\
+ $(eval AM_LDFLAGS += $($(call automake_name,$t)_LDFLAGS) ))
+endef
diff --git a/build-aux/Makefile.once.tail/.gitignore b/build-aux/Makefile.once.tail/.gitignore
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/build-aux/Makefile.once.tail/.gitignore
diff --git a/build-aux/Makefile.once.tail/20-systemd.mk b/build-aux/Makefile.once.tail/20-systemd.mk
new file mode 100644
index 0000000000..b48af97948
--- /dev/null
+++ b/build-aux/Makefile.once.tail/20-systemd.mk
@@ -0,0 +1,111 @@
+# -*- 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/>.
+
+$(topsrcdir)/configure: $(topsrcdir)/configure.ac
+ cd $(topsrcdir) && ./autogen.sh
+ test -f $@
+ touch $@
+$(topoutdir)/config.status: $(topsrcdir)/configure
+ cd $(topoutdir) && ./config.status --recheck
+ test -f $@
+ touch $@
+$(addprefix $(topoutdir)/,config.mk automake.mk autoconf.mk gnustandards.mk po/Makefile.in): $(topoutdir)/%: $(topoutdir)/config.status $(topsrcdir)/%.in
+ cd $(topoutdir) && ./config.status --file=$*
+ test -f $@
+ touch $@
+$(addprefix $(topoutdir)/,config.h): $(topoutdir)/%: $(topoutdir)/config.status $(topsrcdir)/%.in
+ cd $(topoutdir) && ./config.status --header=$* || touch
+ test -f $@
+ touch $@
+
+# Let's run all tests of the test suite, but under valgrind. Let's
+# exclude perl/python/shell scripts we have in there
+.PHONY: valgrind-tests
+valgrind-tests: $(TESTS)
+ $(AM_V_GEN)for f in $(filter-out %.pl %.py, $^); do \
+ if file $$f | grep -q shell; then \
+ echo -e "$${x}Skipping non-binary $$f"; else \
+ echo -e "$${x}Running $$f"; \
+ $(LIBTOOL) --mode=execute valgrind -q --leak-check=full --max-stackframe=5242880 --error-exitcode=55 $(builddir)/$$f ; fi; \
+ x="\n\n"; \
+ done
+
+exported-%: %
+ $(AM_V_GEN)$(NM) -g --defined-only $(builddir)/.libs/$(<:.la=.so) 2>&1 /dev/null | grep " T " | cut -d" " -f3 > $@
+
+exported: $(addprefix exported-, $(lib_LTLIBRARIES))
+ $(AM_V_GEN)sort -u $^ > $@
+
+.PHONY: check-api-docs
+check-api-docs: exported man
+ $(AM_V_GEN)for symbol in `cat exported` ; do \
+ if test -f $(builddir)/man/$$symbol.html ; then \
+ echo " Symbol $$symbol() is documented." ; \
+ else \
+ echo "‣ Symbol $$symbol() lacks documentation." ; \
+ fi ; \
+ done
+
+OBJECT_VARIABLES:=$(filter %_OBJECTS,$(.VARIABLES))
+ALL_OBJECTS:=$(foreach v,$(OBJECT_VARIABLES),$($(v)))
+
+undefined defined: $(ALL_OBJECTS)
+ $(AM_V_GEN)for f in $(ALL_OBJECTS) ; do \
+ $(NM) -g --$@-only `echo $(builddir)/"$$f" | sed -e 's,\([^/]*\).lo$$,.libs/\1.o,'` ; \
+ done | cut -c 20- | cut -d @ -f 1 | sort -u > $@
+
+CLEANFILES += \
+ defined \
+ undefined
+
+.PHONY: check-api-unused
+check-api-unused: defined undefined exported
+ ( cat exported undefined ) | sort -u | diff -u - defined | grep ^+ | grep -v ^+++ | cut -c2-
+
+.PHONY: check-includes
+check-includes: $(top_srcdir)/tools/check-includes.pl
+ $(AM_V_GEN) find * -name '*.[hcS]' -type f -print | sort -u \
+ | xargs $(top_srcdir)/tools/check-includes.pl
+
+EXTRA_DIST += \
+ $(top_srcdir)/tools/check-includes.pl
+
+.PHONY: cppcheck
+cppcheck:
+ cppcheck --enable=all -q $(top_srcdir)
+
+# Used to extract compile flags for YCM.
+print-%:
+ @echo $($*)
+
+git-contrib:
+ @git shortlog -s `git describe --abbrev=0`.. | cut -c8- | awk '{ print $$0 "," }' | sort -u
+
+EXTRA_DIST += \
+ tools/gdb-sd_dump_hashmaps.py
+
+list-keys:
+ gpg --verbose --no-options --no-default-keyring --no-auto-key-locate --batch --trust-model=always --keyring=$(srcdir)/src/import/import-pubring.gpg --list-keys
+
+add-key:
+ gpg --verbose --no-options --no-default-keyring --no-auto-key-locate --batch --trust-model=always --keyring=$(srcdir)/src/import/import-pubring.gpg --import -
diff --git a/build-aux/Makefile.tail.mk b/build-aux/Makefile.tail.mk
new file mode 100644
index 0000000000..b1c50457b7
--- /dev/null
+++ b/build-aux/Makefile.tail.mk
@@ -0,0 +1,51 @@
+# 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/>.
+
+# This bit gets evaluated for each Makefile processed
+
+include $(call _at.reverse,$(sort $(wildcard $(topsrcdir)/build-aux/Makefile.each.tail/*.mk)))
+
+at.subdirs := $(patsubst ./%,%,$(addprefix $(outdir)/,$(at.subdirs)))
+at.depdirs := $(at.depdirs)
+
+# Move all of the dirlocal variables to their namespaced version
+$(foreach v,$(at.dirlocal),$(eval $v/$(outdir) := $$($v)))
+$(foreach v,$(at.dirlocal),$(eval undefine $v))
+
+# 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
+$(foreach _at.NO_ONCE,y,\
+ $(foreach makefile,$(call at.path,$(addsuffix /Makefile,$(at.subdirs/$(outdir)) $(at.depdirs/$(outdir)))),\
+ $(eval include $(filter-out $(_at.included_makefiles),$(makefile)))))
+
+# This bit only gets evaluated once, after all of the other Makefiles are read
+ifeq ($(_at.NO_ONCE),)
+
+outdir = /bogus
+srcdir = /bogus
+
+$(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
new file mode 100644
index 0000000000..c3aef5874f
--- /dev/null
+++ b/build-aux/no-builtin-variables.mk
@@ -0,0 +1,15 @@
+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 ?=
diff --git a/build-aux/write-ifchanged b/build-aux/write-ifchanged
new file mode 100755
index 0000000000..185ceb0039
--- /dev/null
+++ b/build-aux/write-ifchanged
@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+# Copyright (C) 2015 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/>.
+
+outfile=$1
+tmpfile="$(dirname "$outfile")/.tmp${outfile##*/}"
+
+cat > "$tmpfile" || exit $?
+if cmp -s "$tmpfile" "$outfile"; then
+ rm -f "$tmpfile" || :
+else
+ mv -f "$tmpfile" "$outfile"
+fi
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