add build system

Signed-off-by: Mattias Andrée <maandree@member.fsf.org>

15 files changed, 2490 insertions, 0 deletions

diff --git a/mk/README b/mk/README
new file mode 100644
index 0000000..e79926d
--- /dev/null
+++ b/mk/README
@@ -0,0 +1,71 @@
+This is a collection of generic enough makefiles.
+Please feel free to use them in your project.
+
+Usage:
+	Include all.mk from your makefile.
+
+	Read the top of each file for details.
+
+	Define the variables:
+
+		_VERSION
+		This version of the package.
+
+		_PROJECT
+		The name of the project. Must only include [a-z0-9_-].
+
+		_PROJECT_FULL
+		The name of the project. May include any character.
+
+		_SRC
+		All source code files. This list is used when
+		generating the translation template file.
+
+		_COPYRIGHT_HOLDER
+		The copyright holder's full name and e-mail address.
+
+		COMMAND
+		The name of the command. Must not be declared if
+		the package does not include exactly one runnable
+		command.
+
+		PKGNAME
+		The name of the package.
+
+	Variables beginning with __ are used internally by
+	the files where they appear, or in rare cases,
+	internally between these files.
+
+	Variables beginning with _ but not __ are set in the
+	makefile to specify for these files how they should
+	behave. They should not be changed by a user of the
+	package.
+
+	Variables that do not begin with _ are configurable
+	by the user of the package.
+
+	Do no use single character variables in your Makefile.
+
+	To suppress pre-install, post-install, pre-uninstall,
+	and post-uninstall instructions, set N=true.
+	PRE_INSTALL, POST_INSTALL, PRE_UNINSTALL, and
+	POST_UNINSTALL are supportered as specified by the
+	GNU coding standardars.
+
+	To figure out what pre-install commands to run in your package, run:
+		 make -n a=% install | sed -e 's/\\$//' -e 's/^ *//' | sed -n '/^% /s/^..//p'
+
+	To figure out what post-install commands to run in your package, run:
+		 make -n z=% uninstall | sed -e 's/\\$//' -e 's/^ *//' | sed -n '/^% /s/^..//p'
+
+	To figure out what pre-uninstall commands to run in your package, run:
+		 make -n a=% uninstall | sed -e 's/\\$//' -e 's/^ *//' | sed -n '/^% /s/^..//p'
+
+	To figure out what post-uninstall commands to run in your package, run:
+		 make -n z=% uninstall | sed -e 's/\\$//' -e 's/^ *//' | sed -n '/^% /s/^..//p'
+
+	To suppress verbatim which commands Make runs,
+	set Q=@. (Excluding the period.)
+
+Developers should use DEBUG=1 when running make, when possible.
+
diff --git a/mk/all.mk b/mk/all.mk
new file mode 100644
index 0000000..0918306
--- /dev/null
+++ b/mk/all.mk
@@ -0,0 +1,31 @@
+# Copyright (C) 2015  Mattias Andrée <maandree@member.fsf.org>
+# 
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.  This file is offered as-is,
+# without any warranty.
+
+
+#=== This file includes all the other files in appropriate order. ===#
+
+
+ifndef Q
+A = \e[35m
+Z = 
+endif
+
+include $(v)mk/path.mk
+include .config.mk
+include $(v)mk/path.mk
+include $(v)mk/lowerpath.mk
+include $(v)mk/empty.mk
+include $(v)mk/tools.mk
+include $(v)mk/copy.mk
+include $(v)mk/lang-c.mk
+include $(v)mk/texinfo.mk
+include $(v)mk/man.mk
+include $(v)mk/clean.mk
+include $(v)mk/dist.mk
+include $(v)mk/tags.mk
+include $(v)mk/prologue.mk
+
diff --git a/mk/clean.mk b/mk/clean.mk
new file mode 100644
index 0000000..d0a97c4
--- /dev/null
+++ b/mk/clean.mk
@@ -0,0 +1,45 @@
+# Copyright (C) 2015  Mattias Andrée <maandree@member.fsf.org>
+# 
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.  This file is offered as-is,
+# without any warranty.
+
+
+#=== These rules are used for cleaning the repository of generated files. ===#
+
+
+# Delete all files are normally created during a build.
+.PHONY: clean
+clean: clean-dist
+	@$(PRINTF_INFO) '\e[00;01;31mCLEANING BUILT FILES\e[34m\e[00m\n'
+	-$(Q)$(RM) -r -- bin aux
+	@$(ECHO)
+
+# Delete all files that are created during configuration or building.
+.PHONY: distclean
+distclean: clean
+	@$(PRINTF_INFO) '\e[00;01;31mCLEANING CONFIGURATIONS\e[34m\e[00m\n'
+	-$(Q)$(RM) -- .config.mk config.status Makefile
+	@$(ECHO)
+
+# Like `make clean` but do not remove massive binaries
+# that are seldom recompiled.
+.PHONY: mostlyclean
+mostlyclean: clean
+
+# Delete everything except ./configure
+.PHONY: maintainer-clean
+maintainer-clean: clean distclean
+	@$(ECHO)
+	@$(ECHO) 'This command is intended for maintainers to use; it'
+	@$(ECHO) 'deletes files that may need special tools to rebuild.'
+	@$(ECHO)
+
+# Delete all files generated by `make dist`
+.PHONY: clean-dist
+clean-dist:
+	@$(PRINTF_INFO) '\e[00;01;31mCLEANING RELEASES\e[34m\e[00m\n'
+	-$(Q)$(RM) -r -- $(_PROJECT)-*.tar* $(_PROJECT)-*.checksums* $(_PROJECT)-*
+	@$(ECHO)
+
diff --git a/mk/configure b/mk/configure
new file mode 100644
index 0000000..6351380
--- /dev/null
+++ b/mk/configure
@@ -0,0 +1,726 @@
+# -*- shell-script -*-
+
+# Copyright (C) 2015  Mattias Andrée <maandree@member.fsf.org>
+# 
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.  This file is offered as-is,
+# without any warranty.
+
+
+# Run './configure --help' for usage information.
+
+
+#   FOR DEVELOPERS USING THIS SCRIPT:
+# This file is used by include this file, via the . builtin,
+# in your ./configure. Before doing so, you must declare
+#   PKGNAME=the_name_of_your_package
+#   MAN_SECTION_SUFFIX=default_suffix_to_append_to_man_page_section # (usually empty)
+#   MAN_SECTION=the_section_your_man_page_is_in # (do no declare if you do not use exacly one section)
+#   Define the function list_optional_features_help, see the help output.
+#   Define the function unrecognised_argument to deal with any unrecognised argument.
+
+
+
+# Store command for rebuilding Makefile to config.status.
+exec 10>config.status
+
+# Store configurations to .config.mk.
+exec 20>.config.mk
+
+
+# Parse command line.
+incomplete=
+dashed=
+f_help=
+f_gnulinux=
+f_bin_merger=
+for option; do
+    if test -n "${incomplete}"; then
+	option="${incomplete}=${option}"
+	incomplete=
+    fi
+    
+    # For --{with{,out},{en,dis}able}-*.
+    feature="${option#--*}"
+    feature="${feature#*-}"
+    feature="$(echo "${feature}" | tr qwertyuiopasdfghjklzxcvbnm- QWERTYUIOPASDFGHJKLZXCVBNM_)"
+    
+    # For directories and filename tweaks.
+    nodash=_novar
+    
+    case "${dashed}${option}" in
+# general
+	(--)
+	    dashed=yes ;;
+	(--help)
+	    f_help=yes ;;
+	(--destdir | --destdir=* | --pkgdir | --pkgdir=*)
+	    nodash=destdir ;;
+	(--srcdir | --srcdir)
+	    nodash=srcdir ;;
+
+# directory automation
+	(--gnu-linux)
+	    f_gnulinux=yes ;;
+	(--bin-merger)
+	    f_bin_merger=yes ;;
+
+# directories and filenames
+	(--prefix | --prefix=*)
+	    nodash=prefix ;;
+	(--exec-prefix | --exec-prefix=* | --exec_prefix | --exec_prefix=*)
+	    nodash=exec_prefix ;;
+	(--bindir | --bindir=*)
+	    nodash=bindir ;;
+	(--sbindir | --sbindir=*)
+	    nodash=sbindir ;;
+	(--libexecdir | --libexecdir=*)
+	    nodash=libexecdir ;;
+	(--libdir | --libdir=*)
+	    nodash=libdir ;;
+	(--includedir | --includedir=*)
+	    nodash=includedir ;;
+	(--oldincludedir | --oldincludedir=*)
+	    nodash=oldincludedir ;;
+	(--datarootdir | --datarootdir=*)
+	    nodash=datarootdir ;;
+	(--datadir | --datadir=*)
+	    nodash=datadir ;;
+	(--libdatarootdir | --libdatarootdir=*)
+	    nodash=libdatarootdir ;;
+	(--libdatadir | --libdatadir=*)
+	    nodash=libdatadir ;;
+	(--sysconfdir | --sysconfdir=*)
+	    nodash=sysconfdir ;;
+	(--sharedstatedir | --=sharedstatedir*)
+	    nodash=sharedstatedir ;;
+	(--localstatedir | --localstatedir=*)
+	    nodash=localstatedir ;;
+	(--runstatedir | --runstatedir=*)
+	    nodash=runstatedir ;;
+	(--lispdir | --lispdir=*)
+	    nodash=lispdir ;;
+	(--localedir | --localedir=*)
+	    nodash=localedir ;;
+	(--licensedir | --licensedir=*)
+	    nodash=licensedir ;;
+	(--emptydir | --emptydir=*)
+	    nodash=emptydir ;;
+	(--cachedir | --cachedir=*)
+	    nodash=cachedir ;;
+	(--spooldir | --spooldir=*)
+	    nodash=spooldir ;;
+	(--logdir | --logdir=*)
+	    nodash=logdir ;;
+	(--statedir | --statedir=*)
+	    nodash=statedir ;;
+	(--gamedir | --gamedir=*)
+	    nodash=gamedir ;;
+	(--sharedcachedir | --sharedcachedir=*)
+	    nodash=sharedcachedir ;;
+	(--sharedspooldir | --sharedspooldir=*)
+	    nodash=sharedspooldir ;;
+	(--sharedlogdir | --sharedlogdir=*)
+	    nodash=sharedlogdir ;;
+	(--sharedstatedir | --sharedstatedir=*)
+	    nodash=sharedstatedir ;;
+	(--sharedgamedir | --sharedgamedir=*)
+	    nodash=sharedgamedir ;;
+	(--tmpdir | --tmpdir=*)
+	    nodash=tmpdir ;;
+	(--localtmpdir | --localtmpdir=*)
+	    nodash=localtmpdir ;;
+	(--sharedtmpdir | --sharedtmpdir=*)
+	    nodash=sharedtmpdir ;;
+	(--lockdir | --lockdir=*)
+	    nodash=lockdir ;;
+	(--skeldir | --skeldir=*)
+	    nodash=skeldir ;;
+	(--devdir | --devdir=*)
+	    nodash=devdir ;;
+	(--sysdir | --sysdir=*)
+	    nodash=sysdir ;;
+	(--procdir | --procdir=*)
+	    nodash=procdir ;;
+	(--selfprocdir | --selfprocdir=*)
+	    nodash=selfprocdir ;;
+	(--docdir | --docdir=*)
+	    nodash=docdir ;;
+	(--infodir | --infodir=*)
+	    nodash=infodir ;;
+	(--dvidir | --dvidir=*)
+	    nodash=dvidir ;;
+	(--pdfdir | --pdfdir=*)
+	    nodash=pdfdir ;;
+	(--psdir | --psdir=*)
+	    nodash=psdir ;;
+	(--htmldir | --htmldir=*)
+	    nodash=htmldir ;;
+	(--mandir | --mandir=*)
+	    nodash=mandir ;;
+	(--man0 | --man0=*)
+	    nodash=man0 ;;
+	(--man1 | --man1=*)
+	    nodash=man1 ;;
+	(--man2 | --man2=*)
+	    nodash=man2 ;;
+	(--man3 | --man3=*)
+	    nodash=man3 ;;
+	(--man4 | --man4=*)
+	    nodash=man4 ;;
+	(--man5 | --man5=*)
+	    nodash=man5 ;;
+	(--man6 | --man6=*)
+	    nodash=man6 ;;
+	(--man7 | --man7=*)
+	    nodash=man7 ;;
+	(--man8 | --man8=*)
+	    nodash=man8 ;;
+	(--man9 | --man9=*)
+	    nodash=man9 ;;
+	(--man0ext | --man0ext=*)
+	    nodash=man0ext ;;
+	(--man1ext | --man1ext=*)
+	    nodash=man1ext ;;
+	(--man2ext | --man2ext=*)
+	    nodash=man2ext ;;
+	(--man3ext | --man3ext=*)
+	    nodash=man3ext ;;
+	(--man4ext | --man4ext=*)
+	    nodash=man4ext ;;
+	(--man5ext | --man5ext=*)
+	    nodash=man5ext ;;
+	(--man6ext | --man6ext=*)
+	    nodash=man6ext ;;
+	(--man7ext | --man7ext=*)
+	    nodash=man7ext ;;
+	(--man8ext | --man8ext=*)
+	    nodash=man8ext ;;
+	(--man9ext | --man9ext=*)
+	    nodash=man9ext ;;
+	(--manext | --manext=*)
+	    if test -n "${MAN_SECTION}"; then
+		nodash=manext
+	    else
+		printf "\e[01;31m%s: warning: ignoring: %s\e[00m\n" "${0}" "${option}" >&2
+		sleep 1
+	    fi
+	    ;;
+
+# ignored
+	# Unrecognised directories, and settings that cannot be used with internationalisation.
+	(--*dir=* | --*dir | --man?dir | --man?dir=*)
+	    printf "\e[01;31m%s: warning: ignoring: %s\e[00m\n" "${0}" "${option}" >&2
+	    sleep 1
+	    ;;
+
+# feature tweaking
+	(--with-*)
+	    feature="WITH_${feature}"
+	    echo "${feature}" = yes >&20
+	    export "${feature}"=yes
+	    option="${option}=x"
+	    ;;
+	
+	(--without-*)
+	    feature="WITHOUT_${feature}"
+	    echo "${feature}" = yes >&20
+	    export "${feature}"=yes
+	    option="${option}=x"
+	    ;;
+	
+	(--enable-*=*)
+	    param="${feature#*=}"
+	    feature="${feature%%=*}"
+	    if ! test "${param}" = "no"; then
+		feature="ENABLE_${feature}"
+	    else
+		feature="DISABLE_${feature}"
+		param=yes
+	    fi
+	    echo "${feature}" = "${param}" >&20
+	    export "${feature}"="${param}"
+	    ;;
+	
+	(--enable-*)
+	    feature="DISABLE_${feature}"
+	    echo "${feature}" = yes >&20
+	    export "${feature}"=yes
+	    option="${option}=x"
+	    ;;
+	
+	(--disable-*)
+	    feature="DISABLE_${feature}"
+	    echo "${feature}" = yes >&20
+	    export "${feature}"=yes
+	    option="${option}=x"
+	    ;;
+
+# unrecognised
+	(${dashed}--*)
+	    unrecognised_argument "${option}"
+	    ;;
+
+# variables
+	(${dashed}*=*)
+	    var="${option%%=*}"
+	    val="${option#*=}"
+	    if test -n "$(echo "${var}" | tr -d '[_a-zA-Z0-9-]')"; then
+		# Variable is not used and is potentially not
+		# formatted in a compatible way.
+		printf "\e[01;31m%s: warning: ignoring because of bad format: %s\e[00m\n" "${0}" "${option}" >&2
+		sleep 1
+	    fi
+	    echo "${var}" = "${val}" >&20
+	    ;;
+
+# unrecognised
+	(*)
+	    unrecognised_argument "${option}"
+	    ;;
+    esac
+
+    if test "${option%%=*}" = "${option}"; then
+	incomplete="${option}"
+    else
+	eval "${nodash}=${option#*=}"
+	eval "have_${nodash}=yes"
+    fi
+done
+
+
+# Print usage information. This is parsed by
+# the auto-completion script for ./configure.
+if test -n "${f_help}"; then
+    cat <<EOF
+Configure the package (${PKGNAME}) before building and installing.
+
+OPTIONS
+
+general
+  --help                  Print usage information.
+  --destdir=DIR           Output directory for staged install.
+  --srcdir=DIR            The directory for the sources being compiled.
+  VARIABLE=VALUE          Override a variable in the Makefile.
+
+directory automation
+  --gnu-linux             Use default configurations for GNU/Linux.
+  --bin-merger            The OS distribution has symlinked sbin to bin for the select exec-prefix.
+
+tweaking of features
+EOF
+    list_optional_features_help
+    cat <<EOF
+
+tweaking of directories and filenames
+  --prefix=DIR            Prefix used for other directories than.
+  --exec-prefix=DIR       Prefix used for /bin, /sbin, /libexec, and /lib.
+  --bindir=DIR            Executable programs that users can run.
+  --sbindir=DIR           Executable administrative programs.
+  --libexecdir=DIR        Executable programs run by other programs and not be users.
+  --libdir=DIR            Object files and libraries of object code.
+  --includedir=DIR        Header files.
+  --oldincludedir=DIR     Header files. Should have the prefix /usr if the canonical prefix is /usr/local.
+  --datarootdir=DIR       Architecture-independent data files.
+  --datadir=DIR           Architecture-independent resource files.
+  --libdatarootdir=DIR    Architecture-dependent data files.
+  --libdatadir=DIR        Architecture-dependent resource files.
+  --sysconfdir=DIR        Machine-local configuration files.
+  --sharedstatedir=DIR    Network-shared architecture-independent state files.
+  --localstatedir=DIR     Machine-local architecture-independent state files.
+  --runstatedir=DIR       Machine-local runtime state files.
+  --lispdir=DIR           Emacs LISP files.
+  --localedir=DIR         Locale-specific message catalogues.
+  --licensedir=DIR        License files.
+  --emptydir=DIR          An always empty directory.
+  --cachedir=DIR          Machine-local cached files.
+  --spooldir=DIR          Machine-local spooled files.
+  --logdir=DIR            Machine-local log files
+  --statedir=DIR          Machine-local persistent state files
+  --gamedir=DIR           Machine-local highscore files.
+  --sharedcachedir=DIR    Network-shared cached files.
+  --sharedspooldir=DIR    Network-shared spooled files.
+  --sharedlogdir=DIR      Network-shared log files
+  --sharedstatedir=DIR    Network-shared persistent state files
+  --sharedgamedir=DIR     Network-shared highscore files.
+  --tmpdir=DIR            Machine-local volatile temporary files.
+  --localtmpdir=DIR       Machine-local persistent temporary files.
+  --sharedtmpdir=DIR      Network-shared temporary files.
+  --lockdir=DIR           Lock files.
+  --skeldir=DIR           User skeleton.
+  --devdir=DIR            Devices and pseudo-devices.
+  --sysdir=DIR            System-information logical file.
+  --procdir=DIR           Process-information logical file.
+  --selfprocdir=DIR       Process-information logical file for the process itself.
+  --docdir=DIR            Documentation files, other then info manuals and man pages.
+  --infodir=DIR           Info manuals.
+  --dvidir=DIR            DVI manuals.
+  --pdfdir=DIR            PDF manuals.
+  --psdir=DIR             PostScript manuals.
+  --htmldir=DIR           HTML manuals.
+  --mandir=DIR            Top-level directory for man pages.
+  --man0=DIR              Basename of the directory for section 0 man pages.
+  --man1=DIR              Basename of the directory for section 1 man pages.
+  --man2=DIR              Basename of the directory for section 2 man pages.
+  --man3=DIR              Basename of the directory for section 3 man pages.
+  --man4=DIR              Basename of the directory for section 4 man pages.
+  --man5=DIR              Basename of the directory for section 5 man pages.
+  --man6=DIR              Basename of the directory for section 6 man pages.
+  --man7=DIR              Basename of the directory for section 7 man pages.
+  --man8=DIR              Basename of the directory for section 8 man pages.
+  --man9=DIR              Basename of the directory for section 9 man pages.
+EOF
+    if test -n "${MAN_SECTION}"; then
+	cat <<EOF
+  --manext=EXT            Filename suffix for the man page.
+EOF
+    fi
+    cat <<EOF
+  --man0ext=EXT           Filename suffix for section 0 man pages.
+  --man1ext=EXT           Filename suffix for section 1 man pages.
+  --man2ext=EXT           Filename suffix for section 2 man pages.
+  --man3ext=EXT           Filename suffix for section 3 man pages.
+  --man4ext=EXT           Filename suffix for section 4 man pages.
+  --man5ext=EXT           Filename suffix for section 5 man pages.
+  --man6ext=EXT           Filename suffix for section 6 man pages.
+  --man7ext=EXT           Filename suffix for section 7 man pages.
+  --man8ext=EXT           Filename suffix for section 8 man pages.
+  --man9ext=EXT           Filename suffix for section 9 man pages.
+EOF
+    exit 0
+fi
+
+
+# Set unset directories to their default.
+defdir ()
+{
+    p="${2}"
+    if ! test "${p%%\'*}" = "${p}"; then
+	p="$(echo "${p}" | sed "s/'/'\\\\''/g")"
+	p="'${p}'"
+	p="$(echo "${p}" | sed "s/'/'\\\\''/g")"
+    elif ! test "$(printf '%s' ${p})" = "${p}"; then
+	p="'${p}'"
+	p="$(echo "${p}" | sed "s/'/'\\\\''/g")"
+    fi
+    if ! test -n "$(eval echo '${have_'"${1}"'}')"; then
+       eval "${1}='${p}'"
+    fi
+}
+if test -n "${f_gnulinux}"; then
+    defdir prefix "/usr"
+    _prefix=
+    case ${prefix} in
+	('' | /   |   /usr | /usr/  |  /games | /games  |  /usr/games | /usr/games/)
+	    _infix=
+	    ;;
+	(/usr/local  |  /usr/local/  |  /usr/local/games  |  /usr/local/games/)
+	    _infix=/local
+	    ;;
+	(/opt/*)
+	    _infix=${prefix}
+	    ;;
+	(*)
+	    # This probably means somewhere in /home, we do not
+	    # checked because we do not know what else to do.
+	    _infix=
+	    _prefix="${prefix}"
+	    ;;
+    esac
+    defdir sysconfdir "${_prefix}/etc${_infix}"
+    defdir sharedstatedir "${_prefix}/com${_infix}"
+    defdir localstatedir "${_prefix}/var${_infix}"
+    defdir runstatedir "${_prefix}/run${_infix}"
+    defdir tmpdir "${_prefix}/tmp${_infix}"
+else
+    defdir prefix "/usr/local"
+    defdir sysconfdir "${prefix}/etc"
+    defdir sharedstatedir "${prefix}/com"
+    defdir localstatedir "${prefix}/var"
+    defdir runstatedir "${localstatedir}/run"
+    defdir tmpdir "${prefix}/tmp"
+fi
+defdir exec_prefix "${prefix}"
+defdir bindir "${exec_prefix}/bin"
+if test -n "${f_bin_merger}"; then
+    defdir sbindir "${bindir}"
+else
+    defdir sbindir "${exec_prefix}/sbin"
+fi
+defdir libexecdir "${exec_prefix}/libexec"
+defdir libdir "${exec_prefix}/lib"
+defdir includedir "${prefix}/include"
+defdir oldincludedir "${includedir}"
+defdir datarootdir "${prefix}/share"
+defdir datadir "${datarootdir}"
+defdir libdatarootdir "${libdir}"
+defdir libdatadir "${libdir}"
+defdir lispdir "${datarootdir}/emacs/site-lisp"
+defdir localedir "${datarootdir}/locale"
+defdir licensedir "${datarootdir}/licenses"
+defdir cachedir "${localstatedir}/cache"
+defdir spooldir "${localstatedir}/spool"
+defdir emptydir "${localstatedir}/empty"
+defdir logdir "${localstatedir}/log"
+defdir statedir "${localstatedir}/lib"
+defdir gamedir "${localstatedir}/games"
+defdir sharedcachedir "${sharedstatedir}/cache"
+defdir sharedpooldir "${sharedstatedir}/spool"
+defdir sharedlogdir "${sharedstatedir}/log"
+defdir sharedstatedir "${sharedstatedir}/lib"
+defdir sharedgamedir "${sharedstatedir}/games"
+defdir localtmpdir "${localstatedir}/tmp"
+defdir sharedtmpdir "${sharedstatedir}/tmp"
+defdir lockdir "${runstatedir}/lock"
+defdir skeldir "${sysconfdir}/skel"
+defdir devdir "/dev"
+defdir sysdir "/sys"
+defdir procdir "/proc"
+defdir selfprocdir "${procdir}/self"
+defdir docdir "${datarootdir}/doc/${PKGNAME}"
+defdir infodir "${datarootdir}/info"
+defdir dvidir "${docdir}"
+defdir pdfdir "${docdir}"
+defdir psdir "${docdir}"
+defdir htmldir "${docdir}"
+defdir mandir "${datarootdir}/man"
+defdir man0 "man0${MAN_SECTION_SUFFIX}"
+defdir man1 "man1${MAN_SECTION_SUFFIX}"
+defdir man2 "man2${MAN_SECTION_SUFFIX}"
+defdir man3 "man3${MAN_SECTION_SUFFIX}"
+defdir man4 "man4${MAN_SECTION_SUFFIX}"
+defdir man5 "man5${MAN_SECTION_SUFFIX}"
+defdir man6 "man6${MAN_SECTION_SUFFIX}"
+defdir man7 "man7${MAN_SECTION_SUFFIX}"
+defdir man8 "man8${MAN_SECTION_SUFFIX}"
+defdir man9 "man9${MAN_SECTION_SUFFIX}"
+if test -n "${MAN_SECTION}" && ! test -n "$(eval echo '${man'"${MAN_SECTION}"'ext}')"; then
+    defdir man${MAN_SECTION}ext "$(eval echo '${man'"${MAN_SECTION}"'ext}')"
+fi
+defdir man0ext ".0"
+defdir man1ext ".1"
+defdir man2ext ".2"
+defdir man3ext ".3"
+defdir man4ext ".4"
+defdir man5ext ".5"
+defdir man6ext ".6"
+defdir man7ext ".7"
+defdir man8ext ".8"
+defdir man9ext ".9"
+
+# Found source directory.
+if ! test -n "${srcdir}"; then
+    if test -f "Makefile.in"; then
+	:
+    elif test -f "${PWD}/Makefile.in"; then
+	srcdir="${PWD}"
+    elif test -f "${PWD}/../Makefile.in"; then
+	srcdir="${PWD}/.."
+    fi
+fi
+if test -n "${srcdir}"; then
+    srcdir="$(realpath "${srcdir}")/"
+    srcdir_proper="${srcdir}"
+    if ! test "${srcdir%%\'*}" = "${srcdir}"; then
+	srcdir="$(echo "${srcdir}" | sed "s/'/'\\\\''/g")"
+	srcdir="'${srcdir}'"
+    elif ! test "$(printf '%s' ${srcdir})" = "${srcdir}"; then
+	srcdir="'${srcdir}'"
+    fi
+fi
+if ! test -f "${srcdir_proper}Makefile.in"; then
+    echo "${0}: error: cannot found source directory."
+    exit 1
+fi
+
+
+# Add shebang and "generated"-comment to config.status.
+echo '#!/bin/sh' >&10
+echo >&10
+echo '# This file was generated by ./configure, its purpose is two-fold:' >&10
+echo '# 1) It lets you rebuild Makefile with the same configurations you' >&10
+echo '#    used last time you run ./configure.' >&10
+echo '# 2) It lets Makefile rebuild itself transparently when out of date.' >&10
+echo >&10
+
+# config.status should adjust CWD.
+echo 'cd "$(dirname "${0}")"' >&10
+
+# config.status calls ./configure with all arguments you called ./configure.
+echo "exec ${0}" "$@" >&10
+
+# Close config.status.
+exec 10>&-
+
+
+# Store environment (with restrictions).
+env | while read line; do
+    var="${line%%=*}"
+    val="${line#*=}"
+    if test "${var}" = "${line}"; then
+	# Malformated variables. (Can happen!, sigh...)
+	continue
+    elif test -n "$(echo "${var}" | tr -d '[_a-zA-Z0-9-]')"; then
+	# Variable is not used and is potentially not
+	# formatted in a compatible way.
+	continue
+    fi
+    case "${var}" in
+	(_ | PWD | SHELL | SHLVL | TERM | COLORTERM | MAKEFLAGS)
+	    # We do not want to propagate these.
+	    ;;
+	(*)
+	    echo "${var}" = "${val}" >&20
+	    ;;
+    esac
+done
+
+# Store directories and filenames.
+if test -n "${destdir}"; then
+   echo DESTDIR = "${destdir}" >&20
+fi
+echo PREFIX = "${prefix}" >&20
+echo SYSCONFDIR = "${sysconfdir}" >&20
+echo COMDIR = "${sharedstatedir}" >&20
+echo VARDIR = "${localstatedir}" >&20
+echo RUNDIR = "${runstatedir}" >&20
+echo TMPDIR = "${tmpdir}" >&20
+echo DEVDIR = "${devdir}" >&20
+echo SYSDIR = "${sysdir}" >&20
+echo PROCDIR = "${procdir}" >&20
+echo EXEC_PREFIX = "${exec_prefix}" >&20
+echo BINDIR = "${bindir}" >&20
+echo SBINDIR = "${sbindir}" >&20
+echo LIBEXECDIR = "${libexecdir}" >&20
+echo LIBDIR = "${libdir}" >&20
+echo INCLUDEDIR = "${includedir}" >&20
+echo OLDINCLUDEDIR = "${oldincludedir}" >&20
+echo DATADIR = "${datarootdir}" >&20
+echo RESDIR = "${datadir}" >&20
+echo SYSDEPDATADIR = "${libdatarootdir}" >&20
+echo SYSDEPRESDIR = "${libdatadir}" >&20
+echo LISPDIR = "${lispdir}" >&20
+echo LOCALEDIR = "${localedir}" >&20
+echo LICENSEDIR = "${licensedir}" >&20
+echo CACHEDIR = "${cachedir}" >&20
+echo SPOOLDIR = "${spooldir}" >&20
+echo EMPTYDIR = "${emptydir}" >&20
+echo LOGDIR = "${logdir}" >&20
+echo STATEDIR = "${statedir}" >&20
+echo GAMEDIR = "${gamedir}" >&20
+echo COMCACHEDIR = "${sharedcachedir}" >&20
+echo COMPOOLDIR = "${sharedpooldir}" >&20
+echo COMLOGDIR = "${sharedlogdir}" >&20
+echo COMSTATEDIR = "${sharedstatedir}" >&20
+echo COMGAMEDIR = "${sharedgamedir}" >&20
+echo LOCALTMPDIR = "${localtmpdir}" >&20
+echo SHAREDTMPDIR = "${sharedtmpdir}" >&20
+echo LOCKDIR = "${lockdir}" >&20
+echo SKELDIR = "${skeldir}" >&20
+echo SELFPROCDIR = "${selfprocdir}" >&20
+echo DOCDIR = "${docdir}" >&20
+echo INFODIR = "${infodir}" >&20
+echo DVIDIR = "${dvidir}" >&20
+echo PDFDIR = "${pdfdir}" >&20
+echo PSDIR = "${psdir}" >&20
+echo HTMLDIR = "${htmldir}" >&20
+echo MANDIR = "${mandir}" >&20
+echo MAN0 = "${man0}" >&20
+echo MAN1 = "${man1}" >&20
+echo MAN2 = "${man2}" >&20
+echo MAN3 = "${man3}" >&20
+echo MAN4 = "${man4}" >&20
+echo MAN5 = "${man5}" >&20
+echo MAN6 = "${man6}" >&20
+echo MAN7 = "${man7}" >&20
+echo MAN8 = "${man8}" >&20
+echo MAN9 = "${man9}" >&20
+echo MAN0EXT = "${man0ext}" >&20
+echo MAN1EXT = "${man1ext}" >&20
+echo MAN2EXT = "${man2ext}" >&20
+echo MAN3EXT = "${man3ext}" >&20
+echo MAN4EXT = "${man4ext}" >&20
+echo MAN5EXT = "${man5ext}" >&20
+echo MAN6EXT = "${man6ext}" >&20
+echo MAN7EXT = "${man7ext}" >&20
+echo MAN8EXT = "${man8ext}" >&20
+echo MAN9EXT = "${man9ext}" >&20
+
+# Close .config.mk.
+exec 20>&-
+
+# Now, make Makefile available.
+if test -f Makefile; then
+    chmod u+w Makefile # This scripts makes it read-only.
+fi
+exec 30>Makefile
+echo "# ----------------------------------------------------- #" >&30
+echo "# This file was created by ./configure from Makefile.in #" >&30
+echo "# ----------------------------------------------------- #" >&30
+echo >&30
+if test -n "${srcdir}"; then
+   echo v = "${srcdir}" >&30
+fi 
+cat "${srcdir_proper}"Makefile.in >&30
+exec 30>&-
+
+
+# config.status should be executable.
+chmod a+x config.status
+
+# Makefile should be read-only to ones does not edit it by mistake.
+chmod a-w Makefile
+
+
+# Help functions for the parent script.
+test_with ()
+{
+    with="$(eval echo '${WITH_'"${1}"'}')"
+    without="$(eval echo '${WITHOUT_'"${1}"'}')"
+    if ! test -n "${with}" && ! test -n "${without}"; then
+	echo "${2}"
+    elif ! test -n "${with}" && test -n "${without}"; then
+	echo "no"
+    elif test -n "${with}" && ! test -n "${without}"; then
+	echo "yes"
+    elif test "${2}" = yes; then
+	echo "no"
+    else
+	echo "yes"
+    fi
+}
+test_enable ()
+{
+    enable="$(eval echo '${ENABLE_'"${1}"'}')"
+    disable="$(eval echo '${DISABLE_'"${1}"'}')"
+    if ! test -n "${enable}" && ! test -n "${disable}"; then
+	echo "${2}"
+    elif ! test -n "${enable}" && test -n "${disable}"; then
+	echo "no"
+    elif test -n "${enable}" && ! test -n "${disable}"; then
+	echo "${enable}"
+    elif test "${2}" = yes ; then
+	echo "no"
+    else
+	echo "${enable}"
+    fi
+}
+
+
+# After including this file, you may want
+# to do something like:
+#
+#   cat <<EOF
+#   
+#   Enabled features, see ${0} for more infomation:
+#   
+#       Internationalisation     $(test_with GETTEXT yes)
+#       GNU Bash tab-completion  $(test_with BASH yes)
+#       Fish tab-completion      $(test_with FISH yes)
+#       Z shell tab-completion   $(test_with ZSH yes)
+#   
+#   You can now run 'make && make install'.
+#   
+#   EOF
+
diff --git a/mk/copy.mk b/mk/copy.mk
new file mode 100644
index 0000000..1579193
--- /dev/null
+++ b/mk/copy.mk
@@ -0,0 +1,78 @@
+# Copyright (C) 2015  Mattias Andrée <maandree@member.fsf.org>
+# 
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.  This file is offered as-is,
+# without any warranty.
+
+
+#=== These rules are used for legal files. ===#
+
+
+# Enables the rules:
+#   install-copyright  Install all files in _COPYING and _LICENSE
+#   install-copying    Install all files in _COPYING
+#   install-license    Install all files in _LICENSE
+
+
+# WHEN TO BUILD, INSTALL, AND UNINSTALL:
+
+install-base: install-copyright
+uninstall: uninstall-copyright
+
+
+# INSTALL RULES:
+
+.PHONY: install-copyright
+install-copyright:
+
+ifdef _COPYING
+.PHONY: install-copyright
+install-copyright: install-copying
+
+.PHONY: install-copying
+install-copying: $(foreach F,$(_COPYING),$(v)$(F))
+	@$(PRINTF_INFO) '\e[00;01;31mINSTALL\e[34m %s\e[00m\n' "$@"
+	$(Q)$(INSTALL_DIR) -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)"
+	$(Q)$(INSTALL_DATA) $^ -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)"
+	@$(ECHO_EMPTY)
+endif
+
+ifdef _LICENSE
+.PHONY: install-copyright
+install-copyright: install-license
+
+.PHONY: install-license
+install-license: $(foreach F,$(_LICENSE),$(v)$(F))
+	@$(PRINTF_INFO) '\e[00;01;31mINSTALL\e[34m %s\e[00m\n' "$@"
+	$(Q)$(INSTALL_DIR) -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)"
+	$(Q)$(INSTALL_DATA) $^ -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)"
+	@$(ECHO_EMPTY)
+endif
+
+
+# UNINSTALL RULES:
+
+.PHONY: uninstall-copyright
+uninstall-copyright:
+
+ifdef _COPYING
+.PHONY: uninstall-copyright
+uninstall-copyright: uninstall-copying
+
+.PHONY: uninstall-copying
+uninstall-copying:
+	-$(Q)$(RM) -- $(foreach F,$(_COPYING),"$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)/$(F)")
+	-$(Q)$(RMDIR) -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)"
+endif
+
+ifdef _LICENSE
+.PHONY: uninstall-copyright
+uninstall-copyright: uninstall-license
+
+.PHONY: uninstall-license
+uninstall-license:
+	-$(Q)$(RM) -- $(foreach F,$(_LICENSE),"$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)/$(F)")
+	-$(Q)$(RMDIR) -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)"
+endif
+
diff --git a/mk/dist.mk b/mk/dist.mk
new file mode 100644
index 0000000..b6db9e6
--- /dev/null
+++ b/mk/dist.mk
@@ -0,0 +1,189 @@
+# Copyright (C) 2015  Mattias Andrée <maandree@member.fsf.org>
+# 
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.  This file is offered as-is,
+# without any warranty.
+
+
+#=== These rules are used for making releases. ===#
+
+
+# CONFIGURATIONS:
+
+# Formats for packages to generate.
+DIST_FORMATS = tar tar.xz tar.bz2 tar.gz
+
+# Define DO_NOT_SIGN if you do not want sign the release.
+
+# You can select checksums to generate:
+#   Declaring NO_BSD_SUM will omit `sum -r`.
+#   Declaring NO_SYSV_SUM will omit `sum -s`.
+#   List all checksum programs, that do not require any flags, in DIST_CHECKSUMS.
+
+# Any missing flags for GnuPG?
+GPG_FLAGS =
+
+# What key should be used for signing?
+GPG_KEY ?=
+
+# You should define _EVERYTHING to enumerate all files that belong in
+# the release tarball, lest 'git archive' will be used as a fallback.
+
+
+
+# HELP VARIALES:
+
+# You may use these to help list all files in _EVERYTHING
+__EVERYTHING_COMMON = $(_COPYING) $(_LICENSE) README
+__EVERYTHING_SRC = $(foreach F,$(_SRC),src/$(F))
+__EVERYTHING_LOCALE = $(foreach L,$(LOCALES),po/$(L).po)
+__EVERYTHING_SHELL = $(foreach F,$(_AUTO_COMPLETE),src/$(F).auto-completion)  \
+                     $(foreach F,$(_AUTO_COMPLETE),$(foreac F,$(_SHELL_LOCALES),src/$(F).$(L),auto-completion))
+__EVERYTHING_MK_ = all clean copy dist empty i18n lang-c lowerpath man path prologue tags texinfo tools
+__EVERYTHING_MK = $(foreach F,$(__EVERYTHING_MK_),mk/$(F).mk) mk/configure mk/README configure Makefile.in
+__EVERYTHING_MAN = $(foreach S,$(_MAN_PAGE_SECTIONS),$(foreach P,$(_MAN_$(S)),doc/man/$(P).$(S)))  \
+                   $(foreach S,$(_MAN_PAGE_SECTIONS),$(foreach L,$(MAN_LOCALES),$(foreach P,$(_MAN_$(L)_$(S)),doc/man/$(P).$(L).$(S))))
+__EVERYTHING_ALL_COMMON = $(__EVERYTHING_COMMON) $(__EVERYTHING_MK) $(__EVERYTHING_MAN)  \
+                          $(__EVERYTHING_LOCALE) $(__EVERYTHING_SRC) $(__EVERYTHING_SHELL)
+# This one (__todo) if you have a todo file, but do not want it to be greped.
+__TO__ = TO
+__DO__ = DO
+__todo = $(__TO__)$(__DO__)
+
+
+# The packages and there detached signatures (if any.)
+ifndef DO_NOT_SIGN
+__DIST_FILES = $(foreach F,$(DIST_FORMATS),$(_PROJECT)-$(_VERSION).$(F) $(_PROJECT)-$(_VERSION).$(F).sig)
+endif
+ifdef DO_NOT_SIGN
+__DIST_FILES = $(foreach F,$(DIST_FORMATS),$(_PROJECT)-$(_VERSION).$(F))
+endif
+
+# All known checksum programs that are unambiguous.
+__DIST_CHECKSUMS_ALL = cksum md2sum md4sum md5sum md6sum sha0sum sha1sum sha224sum  \
+                       sha256sum sha384sum sha512sum sha512-224sum sha512-256sum \
+                       sha3-224sum sha3-256sum sha3-384sum sha3-512sum shake256sum  \
+                       shake512sum rawshake256sum rawshake512sum keccak-224sum  \
+                       keccak-256sum keccak-384sum keccak-512sum keccaksum
+
+# All installed checksum programs that are unambiguous.
+DIST_CHECKSUMS = $(foreach C,$(__DIST_CHECKSUMS_ALL),$(shell if command -v $(C) >/dev/null; then $(ECHO) $(C); fi))
+
+
+
+# MAKE RULES:
+
+# Generate release files. (Tarballs, compressed and uncompressed; signatures; checksums.)
+.PHONY: dist
+dist: dist-balls dist-checksums
+
+
+
+# HELP MAKE RULES:
+
+# Generate tarballs, compressed and uncompressed,
+.PHONY: dist-balls
+dist-balls: $(__DIST_FILES)
+
+ifndef DO_NOT_SIGN
+# Generate checksums and signature of checksums.
+.PHONY: dist-checksums
+dist-checksums: $(_PROJECT)-$(_VERSION).checksums $(_PROJECT)-$(_VERSION).checksums.sig
+
+# Generate uncompressed tarball and signature of it.
+.PHONY: dist-tar
+dist-tar: $(_PROJECT)-$(_VERSION).tar $(_PROJECT)-$(_VERSION).tar.sig
+
+# Generate xz-copressed tarball and signature of it.
+.PHONY: dist-xz
+dist-xz: $(_PROJECT)-$(_VERSION).tar.xz $(_PROJECT)-$(_VERSION).tar.xz.sig
+
+# Generate bz2-copressed tarball and signature of it.
+.PHONY: dist-bzip2
+dist-bz2: $(_PROJECT)-$(_VERSION).tar.bz2 $(_PROJECT)-$(_VERSION).tar.bz2.sig
+
+# Generate gzip-copressed tarball and signature of it.
+.PHONY: dist-gz
+dist-gz: $(_PROJECT)-$(_VERSION).tar.gz $(_PROJECT)-$(_VERSION).tar.sig
+endif
+ifdef DO_NOT_SIGN
+# Generate checksums, but no signature.
+.PHONY: dist-checksums
+dist-checksums: $(_PROJECT)-$(_VERSION).checksums
+
+# Generate uncompressed tarball, but no signature.
+.PHONY: dist-tar
+dist-tar: $(_PROJECT)-$(_VERSION).tar
+
+# Generate xz-compressed tarball, but no signature.
+.PHONY: dist-xz
+dist-xz: $(_PROJECT)-$(_VERSION).tar.xz
+
+# Generate bzip2-compressed tarball, but no signature.
+.PHONY: dist-bz2
+dist-bz2: $(_PROJECT)-$(_VERSION).tar.bz2
+
+# Generate gzip-compressed tarball, but no signature.
+.PHONY: dist-gz
+dist-gz: $(_PROJECT)-$(_VERSION).tar.gz
+endif
+
+# Generate the tarball for the release.
+ifdef v
+__GIT_DIR = --git-dir=$(v)
+endif
+$(_PROJECT)-$(_VERSION).tar: $(foreach F,$(_EVERYTHING),$(v)$(F))
+	@$(PRINTF_INFO) '\e[00;01;31mTAR\e[34m %s\e[00m$A\n' "$@"
+	@if $(TEST) -f $@; then $(RM) $@; fi
+ifndef _EVERYTHING
+	$(Q)git archive --prefix=$(_PROJECT)-$(_VERSION)/ --format=tar $(__GIT_DIR) $(_VERSION) -o $@ #$Z
+endif
+ifdef _EVERYTHING
+	$(Q)$(LN) -s . $(_PROJECT)-$(_VERSION)
+	$(Q)$(TAR) c -- $(foreach F,$(_EVERYTHING),$(v)$(_PROJECT)-$(_VERSION)/$(F)) > $@
+	$(Q)$(RM) $(_PROJECT)-$(_VERSION)
+endif
+	@$(ECHO_EMPTY)
+
+# Compression rule for xz-compression. Used on the tarball.
+%.xz: %
+	@$(PRINTF_INFO) '\e[00;01;31mXZ\e[34m %s\e[00m$A\n' "$@"
+	@if $(TEST) -f $@; then $(RM) $@; fi
+	$(Q)$(XZ_COMPRESS) $< #$Z
+	@$(ECHO_EMPTY)
+
+# Compression rule for bzip2-compression. Used on the tarball.
+%.bz2: %
+	@$(PRINTF_INFO) '\e[00;01;31mBZIP2\e[34m %s\e[00m$A\n' "$@"
+	@if $(TEST) -f $@; then $(RM) $@; fi
+	$(Q)$(BZIP2_COMPRESS) $< #$Z
+	@$(ECHO_EMPTY)
+
+# Compression rule for gzip-compression. Used on the tarball.
+%.gz: %
+	@$(PRINTF_INFO) '\e[00;01;31mGZIP\e[34m %s\e[00m$A\n' "$@"
+	@if $(TEST) -f $@; then $(RM) $@; fi
+	$(Q)$(GZIP_COMPRESS) $< #$Z
+	@$(ECHO_EMPTY)
+
+# Generate checksums of tarballs, compressed and uncompressed, and of their detached signatures.
+$(_PROJECT)-$(_VERSION).checksums: $(__DIST_FILES)
+	@$(PRINTF_INFO) '\e[00;01;31mCHECKSUM\e[34m %s\e[00m\n' "$@"
+	@$(PRINTF) '' > $@
+ifndef NO_BSD_SUM
+	@if ! ($(ECHO) ':: sum -r ::' && sum -r $^ && $(ECHO)) >> $@ ; then $(PRINTF) '' > $@; fi
+endif
+ifndef NO_SYSV_SUM
+	@if ! ($(ECHO) ':: sum -s ::' && sum -s $^ && $(ECHO)) >> $@ ; then $(PRINTF) '' > $@; fi
+endif
+	@$(foreach C,$(DIST_CHECKSUMS),$(ECHO) ':: $(C) ::' >> $@ && $(C) $^ | $(GREP) -v '^--' >> $@ && $(ECHO) >> $@ &&) $(TRUE)
+	@$(ECHO_EMPTY)
+
+# Signing rule. Used on the tarballs, compressed and uncompressed, and on the checksum file.
+%.sig: %
+	@$(PRINTF_INFO) '\e[00;01;31mSIG\e[34m %s\e[00m$A\n' "$@"
+	@if $(TEST) -f $@; then $(RM) $@; fi
+	$(Q)$(GPG) $(GPG_FLAGS) --local-user $(GPG_KEY) --detach-sign --armor --output $@ < $< #$Z
+	@$(ECHO_EMPTY)
+
diff --git a/mk/empty.mk b/mk/empty.mk
new file mode 100644
index 0000000..81c06fb
--- /dev/null
+++ b/mk/empty.mk
@@ -0,0 +1,94 @@
+# Copyright (C) 2015  Mattias Andrée <maandree@member.fsf.org>
+# 
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.  This file is offered as-is,
+# without any warranty.
+
+
+#=== This file includes empty rules that are filled by other files. ===#
+
+
+.PHONY: all
+all:
+
+.PHONY: everything
+everything:
+
+.PHONY: base
+base:
+
+.PHONY: cmd
+cmd:
+
+.PHONY: doc
+doc:
+
+
+.PHONY: check
+check:
+
+
+.PHONY: install
+install:
+
+.PHONY: install-everything
+install-everything:
+
+.PHONY: install-base
+install-base:
+
+.PHONY: install-cmd
+install-cmd:
+
+.PHONY: install-doc
+install-doc:
+
+
+.PHONY: installcheck
+installcheck:
+
+
+.PHONY: uninstall
+uninstall:
+
+
+
+.PHONY: all
+all: base
+
+.PHONY: everything
+everything: base
+
+.PHONY: base
+base: cmd
+
+
+.PHONY: install
+install: install-base
+
+.PHONY: install-everything
+install-everything: install-base
+
+.PHONY: install-base
+install-base: install-cmd
+
+
+
+.PHONY: install-strip
+install-strip: __STRIP = -s
+install-strip: install
+
+.PHONY: install-everything-strip
+install-everything-strip: __STRIP = -s
+install-everything-strip: install-everything
+
+.PHONY: install-base-strip
+install-base-strip: __STRIP = -s
+install-base-strip: install-base
+
+.PHONY: install-cmd-strip
+install-cmd-strip: __STRIP = -s
+install-cmd-strip: install-cmd
+
+
diff --git a/mk/lang-c.mk b/mk/lang-c.mk
new file mode 100644
index 0000000..b8076d6
--- /dev/null
+++ b/mk/lang-c.mk
@@ -0,0 +1,199 @@
+# Copyright (C) 2015  Mattias Andrée <maandree@member.fsf.org>
+# 
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.  This file is offered as-is,
+# without any warranty.
+
+
+#=== This file includes rules for C programs. ===#
+
+
+# This file is ignored unless _C_STD is defined.
+# _C_STD should be set the the version of C that
+# is used.
+# 
+# If you want to compile with -pedantic, define
+# the variable _PEDANTIC.
+# 
+# Define _CPPFLAGS with any additional CPP
+# flags to use, _CFLAGS with any additional CC
+# flags to use, and _LDFLAGS with any additional
+# LD flags to use.
+# 
+# Defined in path.mk, you can change _ALL_DIRS
+# if you do not want CPP definitions for all
+# directories.
+# 
+# Define _HEADER_DIRLEVELS to specify the directory
+# nesting level in src. It is assumed that all
+# directories contain header files. Set to '0' if
+# there are no header files.
+# 
+# _BIN shall list all commands to build. These
+# should be the basenames. For each command
+# you should be the variable _OBJ_$(COMMAND)
+# that lists all objects files (without the
+# suffix and without the aux/ prefix) that
+# are required to build the command.
+
+
+ifdef _C_STD
+
+
+
+# WHEN TO BUILD, INSTALL, AND UNINSTALL:
+
+cmd: cmd-c
+install-cmd: install-cmd-c
+uninstall: uninstall-cmd-c
+
+
+# HELP VARIABLES:
+
+# Figure out whether the GCC is being used.
+ifeq ($(shell $(PRINTF) '%s\n' ${CC} | $(HEAD) -n 1),gcc)
+__USING_GCC = 1
+endif
+
+
+# BUILD VARIABLES:
+
+# Optimisation settings for C code compilation.
+ifndef DEBUG
+OPTIMISE = -O2 -g
+endif
+ifndef DEBUG
+ifdef OPTIMISE
+ifdef __USING_GCC
+OPTIMISE = -Og -g
+endif
+ifndef __USING_GCC
+OPTIMISE = -g
+endif
+endif
+endif
+
+# Warning settings for C code compilation.
+ifdef _PEDANTIC
+_PEDANTIC = -pedantic
+endif
+ifndef DEBUG
+WARN = -Wall
+endif
+ifdef DEBUG
+ifdef __USING_GCC
+WARN = -Wall -Wextra $(_PEDANTIC) -Wdouble-promotion -Wformat=2 -Winit-self -Wmissing-include-dirs   \
+       -Wtrampolines -Wmissing-prototypes -Wmissing-declarations -Wnested-externs                    \
+       -Wno-variadic-macros -Wsync-nand -Wunsafe-loop-optimizations -Wcast-align                     \
+       -Wdeclaration-after-statement -Wundef -Wbad-function-cast -Wwrite-strings -Wlogical-op        \
+       -Wstrict-prototypes -Wold-style-definition -Wpacked -Wvector-operation-performance            \
+       -Wunsuffixed-float-constants -Wsuggest-attribute=const -Wsuggest-attribute=noreturn           \
+       -Wsuggest-attribute=format -Wnormalized=nfkc -fstrict-aliasing -fipa-pure-const -ftree-vrp    \
+       -fstack-usage -funsafe-loop-optimizations -Wshadow -Wredundant-decls -Winline -Wcast-qual     \
+       -Wsign-conversion -Wstrict-overflow=5 -Wconversion -Wsuggest-attribute=pure -Wswitch-default  \
+       -Wstrict-aliasing=1 -fstrict-overflow -Wfloat-equal -Wpadded -Waggregate-return               \
+       -Wtraditional-conversion
+endif
+ifndef __USING_GCC
+WARN = -Wall -Wextra $(_PEDANTIC)
+endif
+endif
+
+# Support for internationalisation?
+ifndef WITHOUT_GETTEXT
+_CPPFLAGS += -D'USE_GETTEXT=1'
+endif
+
+# Add CPP definitions for all directories.
+_CPPFLAGS += $(foreach D,$(_ALL_DIRS),-D'$(D)="$($(D))"')
+
+
+# MORE HELP VARIABLES:
+
+# Compilation and linking flags, and command.
+CPPFLAGS =
+CFLAGS = $(OPTIMISE) $(WARN)
+LDFLAGS = $(OPTIMISE) $(WARN)
+__CC = $(CC) -std=$(_C_STD) -c $(_CPPFLAGS) $(_CFLAGS)
+__LD = $(CC) -std=$(_C_STD) $(_LDFLAGS)
+__CC_POST = $(CPPFLAGS) $(CFLAGS) $(EXTRA_CPPFLAGS) $(EXTRA_CFLAGS)
+__LD_POST = $(LDFLAGS) $(EXTRA_LDFLAGS)
+
+# Header files.
+__H =
+ifdef _HEADER_DIRLEVELS
+ifeq ($(_HEADER_DIRLEVELS),1)
+__H += src/*.h
+endif
+ifneq ($(_HEADER_DIRLEVELS),1)
+ifeq ($(_HEADER_DIRLEVELS),2)
+__H += src/*.h
+__H += src/*/*.h
+endif
+ifneq ($(_HEADER_DIRLEVELS),2)
+ifneq ($(_HEADER_DIRLEVELS),0)
+__H += $(foreach W,$(shell $(SEQ) $(_HEADER_DIRLEVELS) | while read n; do $(ECHO) $$($(SEQ) $$n)" " | $(SED) 's/[^ ]* /\/\*/g'; done | $(XARGS) $(ECHO)),src$(W).h)
+endif
+endif
+endif
+endif
+
+
+# BUILD RULES:
+
+.PHONY: cmd-c
+cmd-c: $(foreach B,$(_BIN),bin/$(B))
+
+# Compile a C file into an object file.
+aux/%.o: $(v)src/%.c $(foreach H,$(__H),$(v)$(H))
+	@$(PRINTF_INFO) '\e[00;01;31mCC\e[34m %s\e[00m$A\n' "$@"
+	@$(MKDIR) -p $(shell $(DIRNAME) $@)
+	$(Q)$(__CC) -o $@ $< $(__CC_POST) #$Z
+	@$(ECHO_EMPTY)
+
+# Link object files into a command.
+# Dependencies are declared below.
+bin/%:
+	@$(PRINTF_INFO) '\e[00;01;31mLD\e[34m %s\e[00;32m$A\n' "$@"
+	@$(MKDIR) -p bin
+	$(Q)$(__LD) -o $@ $^ $(__LD_POST) #$Z
+	@$(ECHO_EMPTY)
+
+# Dependencies for the rule above.
+include aux/lang-c.mk
+aux/lang-c.mk: Makefile
+	@$(MKDIR) -p aux
+	@$(ECHO) > aux/lang-c.mk
+	@$(foreach B,$(_BIN),$(ECHO) bin/$(B): $(foreach O,$(_OBJ_$(B)),aux/$(O).o) >> aux/lang-c.mk)
+
+
+# INSTALL RULES:
+
+.PHONY: install-cmd-c
+install-cmd-c: $(foreach B,$(_BIN),bin/$(B))
+	@$(PRINTF_INFO) '\e[00;01;31mINSTALL\e[34m %s\e[00m\n' "$@"
+	$(Q)$(INSTALL_DIR) -- "$(DESTDIR)$(BINDIR)"
+ifdef COMMAND
+	$(Q)$(INSTALL_PROGRAM) $(__STRIP) $^ -- "$(DESTDIR)$(BINDIR)"
+endif
+ifndef COMMAND
+	$(Q)$(INSTALL_PROGRAM) $(__STRIP) $^ -- "$(DESTDIR)$(BINDIR)/$(COMMAND)"
+endif
+	@$(ECHO_EMPTY)
+
+
+# UNINSTALL RULES:
+
+.PHONY: uninstall-cmd-c
+uninstall-cmd-c:
+ifdef COMMAND
+	-$(Q)$(RM) -- "$(DESTDIR)$(BINDIR)/$(COMMAND)"
+endif
+ifndef COMMAND
+	-$(Q)$(RM) -- $(foreach B,$(_BIN),"$(DESTDIR)$(BINDIR)/$(B)")
+endif
+
+
+endif
+
diff --git a/mk/lowerpath.mk b/mk/lowerpath.mk
new file mode 100644
index 0000000..aadb91f
--- /dev/null
+++ b/mk/lowerpath.mk
@@ -0,0 +1,279 @@
+# Copyright (C) 2015  Mattias Andrée <maandree@member.fsf.org>
+# 
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.  This file is offered as-is,
+# without any warranty.
+
+
+#=== This file overrides values uppercase path variables with values lowercase path variables. ===#
+
+
+ifdef srcdir
+VPATH = $(srcdir)
+endif
+
+ifdef prefix
+PREFIX = $(prefix)
+endif
+
+ifdef sysconfdir
+SYSCONFDIR = $(sysconfdir)
+endif
+
+ifdef sharedstatedir
+COMDIR = $(sharedstatedir)
+endif
+
+ifdef localstatedir
+VARDIR = $(localstatedir)
+endif
+
+ifdef runstatedir
+RUNDIR = $(runstatedir)
+endif
+
+ifdef tmpdir
+TMPDIR = $(tmpdir)
+endif
+
+ifdef devdir
+DEVDIR = $(devdir)
+endif
+
+ifdef sysdir
+SYSDIR = $(sysdir)
+endif
+
+ifdef procdir
+PROCDIR = $(procdir)
+endif
+
+ifdef exec_prefix
+EXEC_PREFIX = $(exec_prefix)
+endif
+
+ifdef bindir
+BINDIR = $(bindir)
+endif
+
+ifdef sbindir
+SBINDIR = $(sbindir)
+endif
+
+ifdef libexecdir
+LIBEXECDIR = $(libexecdir)
+endif
+
+ifdef libdir
+LIBDIR = $(libdir)
+endif
+
+ifdef includedir
+INCLUDEDIR = $(includedir)
+endif
+
+ifdef oldincludedir
+OLDINCLUDEDIR = $(oldincludedir)
+endif
+
+ifdef datarootdir
+DATADIR = $(datarootdir)
+endif
+
+ifdef datadir
+RESDIR = $(datadir)
+endif
+
+ifdef libdatarootdir
+SYSDEPDATADIR = $(libdatarootdir)
+endif
+
+ifdef libdatadir
+SYSDEPRESDIR = $(libdatadir)
+endif
+
+ifdef lispdir
+LISPDIR = $(lispdir)
+endif
+
+ifdef localedir
+LOCALEDIR = $(localedir)
+endif
+
+ifdef licensedir
+LICENSEDIR = $(licensedir)
+endif
+
+ifdef cachedir
+CACHEDIR = $(cachedir)
+endif
+
+ifdef spooldir
+SPOOLDIR = $(spooldir)
+endif
+
+ifdef emptydir
+EMPTYDIR = $(emptydir)
+endif
+
+ifdef logdir
+LOGDIR = $(logdir)
+endif
+
+ifdef statedir
+STATEDIR = $(statedir)
+endif
+
+ifdef gamedir
+GAMEDIR = $(gamedir)
+endif
+
+ifdef sharedcachedir
+COMCACHEDIR = $(sharedcachedir)
+endif
+
+ifdef sharedpooldir
+COMPOOLDIR = $(sharedpooldir)
+endif
+
+ifdef sharedlogdir
+COMLOGDIR = $(sharedlogdir)
+endif
+
+ifdef sharedlogdir
+COMSTATEDIR = $(sharedstatedir)
+endif
+
+ifdef sharedgamedir
+COMGAMEDIR = $(sharedgamedir)
+endif
+
+ifdef localtmpdir
+VARTMPDIR = $(localtmpdir)
+endif
+
+ifdef sharedtmpdir
+COMTMPDIR = $(sharedtmpdir)
+endif
+
+ifdef lockdir
+LOCKDIR = $(lockdir)
+endif
+
+ifdef skeldir
+SKELDIR = $(skeldir)
+endif
+
+ifdef selfprocdir
+SELFPROCDIR = $(selfprocdir)
+endif
+
+ifdef docdir
+DOCDIR = $(docdir)
+endif
+
+ifdef infodir
+INFODIR = $(infodir)
+endif
+
+ifdef dvidir
+DVIDIR = $(dvidir)
+endif
+
+ifdef pdfdir
+PDFDIR = $(pdfdir)
+endif
+
+ifdef psdir
+PSDIR = $(psdir)
+endif
+
+ifdef htmldir
+HTMLDIR = $(htmldir)
+endif
+
+ifdef mandir
+MANDIR = $(mandir)
+endif
+
+ifdef man0
+MAN0 = $(man0)
+endif
+
+ifdef man1
+MAN1 = $(man1)
+endif
+
+ifdef man2
+MAN2 = $(man2)
+endif
+
+ifdef man3
+MAN3 = $(man3)
+endif
+
+ifdef man4
+MAN4 = $(man4)
+endif
+
+ifdef man5
+MAN5 = $(man5)
+endif
+
+ifdef man6
+MAN6 = $(man6)
+endif
+
+ifdef man7
+MAN7 = $(man7)
+endif
+
+ifdef man8
+MAN8 = $(man8)
+endif
+
+ifdef man9
+MAN9 = $(man9)
+endif
+
+ifdef man0ext
+MAN0EXT = $(man0ext)
+endif
+
+ifdef man1ext
+MAN1EXT = $(man1ext)
+endif
+
+ifdef man2ext
+MAN2EXT = $(man2ext)
+endif
+
+ifdef man3ext
+MAN3EXT = $(man3ext)
+endif
+
+ifdef man4ext
+MAN4EXT = $(man4ext)
+endif
+
+ifdef man5ext
+MAN5EXT = $(man5ext)
+endif
+
+ifdef man6ext
+MAN6EXT = $(man6ext)
+endif
+
+ifdef man7ext
+MAN7EXT = $(man7ext)
+endif
+
+ifdef man8ext
+MAN8EXT = $(man8ext)
+endif
+
+ifdef man9ext
+MAN9EXT = $(man9ext)
+endif
+
diff --git a/mk/man.mk b/mk/man.mk
new file mode 100644
index 0000000..8105249
--- /dev/null
+++ b/mk/man.mk
@@ -0,0 +1,111 @@
+# Copyright (C) 2015  Mattias Andrée <maandree@member.fsf.org>
+# 
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.  This file is offered as-is,
+# without any warranty.
+
+
+#=== These rules are used for man pages. ===#
+
+
+# Enables the rules:
+#   install-man               Install all man page
+#   install-man-untranslated  Install untranslated man page
+#   install-man-locale        Install translated man page
+# 
+# This file is ignored unless _MAN_PAGE_SECTIONS
+# is defined. _MAN_PAGE_SECTIONS should list all
+# used man page sections. For all used sections
+# there should also be a variable named
+# _MAN_$(SECTION) that lists the suffixless
+# basename of all man pages in that section.
+# 
+# The pathname of a man page should look
+# like this: doc/man/$(DOCUMENT).$(SECTION)
+# Translations looks like this:
+# doc/man/$(DOCUMENT).$(LANGUAGE).$(SECTION)
+# 
+# For each language and section, there should
+# be a variable _MAN_$(LANGUAGE)_$(SECTION)
+# that lists all translated documents in that
+# section and for that lanuage. These should
+# be suffixless basenames. The lanuage counts
+# as a suffix.
+# 
+# The translations of the man pages to
+# install should be specified, by language,
+# in the variable MAN_LOCALES.
+
+
+ifdef _MAN_PAGE_SECTIONS
+
+
+# WHEN TO BUILD, INSTALL, AND UNINSTALL:
+
+install: install-man
+install-everything: install-man
+install-doc: install-man
+uninstall: uninstall-man
+
+
+# HELP VARIABLES
+
+# Customisable man page filename.
+ifdef COMMAND
+ifeq ($(shell $(PRINTF) '%s\n' $(COMMAND) | $(WC) -l),1)
+ifeq ($(shell $(PRINTF) '%s\n' $(_MAN_PAGE_SECTIONS) | $(WC) -l),1)
+ifeq ($(shell $(PRINTF) '%s\n' $(_MAN_$(_MAN_PAGE_SECTIONS)) | $(WC) -l),1)
+__MAN_COMMAND = $(COMMAND)$(MAN$(_MAN_PAGE_SECTIONS)EXT)
+endif
+endif
+endif
+endif
+
+
+# INSTALL RULES:
+
+.PHONY: install-man
+install-man: install-man-untranslated install-man-locale
+
+.PHONY: install-man-untranslated
+install-man-untranslated:
+	@$(PRINTF_INFO) '\e[00;01;31mINSTALL\e[34m %s\e[00m\n' "$@"
+	$(Q)$(INSTALL_DIR) -- $(foreach S,$(_MAN_PAGE_SECTIONS),"$(DESTDIR)$(MANDIR)/$(MAN$(S))")
+ifndef __MAN_COMMAND
+	$(Q)$(foreach S,$(_MAN_PAGE_SECTIONS),$(foreach P,$(_MAN_$(S)),$(INSTALL_DATA) $(v)doc/man/$(P).$(S) -- "$(DESTDIR)$(MANDIR)/$(MAN$(S))/$(P)$(MAN$(S)EXT)" &&)) $(TRUE)
+endif
+ifdef __MAN_COMMAND
+	$(Q)$(foreach S,$(_MAN_PAGE_SECTIONS),$(foreach P,$(_MAN_$(S)),$(INSTALL_DATA) $(v)doc/man/$(P).$(S) -- "$(DESTDIR)$(MANDIR)/$(MAN$(S))/$(__MAN_COMMAND)" &&)) $(TRUE)
+endif
+	@$(ECHO_EMPTY)
+
+.PHONY: install-man-locale
+install-man-locale:
+	@$(PRINTF_INFO) '\e[00;01;31mINSTALL\e[34m %s\e[00m\n' "$@"
+	$(Q)$(foreach L,$(MAN_LOCALES),$(INSTALL_DIR) -- $(foreach S,$(_MAN_PAGE_SECTIONS),"$(DESTDIR)$(MANDIR)/$(L)/$(MAN$(S))") &&) $(TRUE)
+ifndef __MAN_COMMAND
+	$(Q)$(foreach L,$(MAN_LOCALES),$(foreach S,$(_MAN_PAGE_SECTIONS),$(foreach P,$(_MAN_$(L)_$(S)),$(INSTALL_DATA) $(v)doc/man/$(P).$(L).$(S) -- "$(DESTDIR)$(MANDIR)/$(L)/$(MAN$(S))/$(P)$(MAN$(S)EXT)" &&))) $(TRUE)
+endif
+ifdef __MAN_COMMAND
+	$(Q)$(foreach L,$(MAN_LOCALES),$(foreach S,$(_MAN_PAGE_SECTIONS),$(foreach P,$(_MAN_$(L)_$(S)),$(INSTALL_DATA) $(v)doc/man/$(P).$(L).$(S) -- "$(DESTDIR)$(MANDIR)/$(L)/$(MAN$(S))/$(__MAN_COMMAND)" &&))) $(TRUE)
+endif
+	@$(ECHO_EMPTY)
+
+
+# UNINSTALL RULES:
+
+.PHONY: uninstall-man
+uninstall-man:
+ifndef __MAN_COMMAND
+	-$(Q)$(RM) -- $(foreach S,$(_MAN_PAGE_SECTIONS),$(foreach P,$(_MAN_$(S)),"$(DESTDIR)$(MANDIR)/$(MAN$(S))/$(P).$(MAN$(S)EXT)"))
+	-$(Q)$(RM) -- $(foreach L,$(MAN_LOCALES),$(foreach S,$(_MAN_PAGE_SECTIONS),$(foreach P,$(_MAN_$(L)_$(S)),"$(DESTDIR)$(MANDIR)/$(L)/$(MAN$(S))/$(P)$(MAN$(S)EXT)")))
+endif
+ifdef __MAN_COMMAND
+	-$(Q)$(RM) -- "$(DESTDIR)$(MANDIR)/$(MAN$(_MAN_PAGE_SECTIONS))/$(__MAN_COMMAND)"
+	-$(Q)$(RM) -- $(foreach L,$(MAN_LOCALES),$(foreach S,$(_MAN_PAGE_SECTIONS),$(foreach P,$(_MAN_$(L)_$(S)),"$(DESTDIR)$(MANDIR)/$(L)/$(MAN$(S))/$(__MAN_COMMAND)")))
+endif
+
+
+endif
+
diff --git a/mk/path.mk b/mk/path.mk
new file mode 100644
index 0000000..a65b7b8
--- /dev/null
+++ b/mk/path.mk
@@ -0,0 +1,176 @@
+# Copyright (C) 2015  Mattias Andrée <maandree@member.fsf.org>
+# 
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.  This file is offered as-is,
+# without any warranty.
+
+
+#=== This file define path variables. ===#
+
+
+ifndef __PATH_MK_INCLUDED
+__PATH_MK_INCLUDED = 1
+
+
+# DIRECTORIES:
+
+# The package path prefix, if you want to install to another root, set DESTDIR to that root.
+PREFIX = /usr
+# The package path prefix for /bin, /sbin, /lib and /libexec.
+EXEC_PREFIX = /usr
+# The command path excluding prefix.
+BIN = /bin
+# The administration command path excluding prefix.
+SBIN = /sbin
+# The library path excluding prefix.
+LIB = /lib
+# The executable library path excluding prefix.
+LIBEXEC = /libexec
+# The header-file path excluding prefix.
+INCLUDE = /include
+# The resource path excluding prefix.
+DATA = /share
+# The man page sections path excluding prefix.
+MAN0 = /man0
+MAN1 = /man1
+MAN2 = /man2
+MAN3 = /man3
+MAN4 = /man4
+MAN5 = /man5
+MAN6 = /man6
+MAN7 = /man7
+MAN8 = /man8
+MAN9 = /man9
+
+# The command path including prefix.
+BINDIR = $(EXEC_PREFIX)$(BIN)
+# The administration command path including prefix.
+SBINDIR = $(EXEC_PREFIX)$(SBIN)
+# The library path including prefix.
+LIBDIR = $(EXEC_PREFIX)$(LIB)
+# The executable library path including prefix.
+LIBEXECDIR = $(EXEC_PREFIX)$(LIBEXEC)
+# The header-file path including prefix.
+INCLUDEDIR = $(PREFIX)$(INCLUDE)
+# The header-file path including prefix. Must not be /usr/local.
+ifeq ($(PREFIX),/usr/lcoal)
+OLDINCLUDEDIR = /usr$(INCLUDE)
+endif
+ifneq ($(PREFIX),/usr/lcoal)
+OLDINCLUDEDIR = $(PREFIX)$(INCLUDE)
+endif
+# The data path including prefix.
+DATADIR = $(PREFIX)$(DATA)
+# The architecture-dependent data path including prefix.
+SYSDEPDATADIR = $(DATADIR)
+# The resource path including prefix.
+RESDIR = $(DATADIR)
+# The architecture-dependent resource path including prefix.
+SYSDEPRESDIR = $(RESDIR)
+# The generic documentation path including prefix.
+DOCDIR = $(DATADIR)/doc/$(PKGNAME)
+# The info manual documentation path including prefix.
+INFODIR = $(DATADIR)/info
+# The DVI documentation path including prefix.
+DVIDIR = $(DOCDIR)
+# The PDF documentation path including prefix.
+PDFDIR = $(DOCDIR)
+# The PostScript documentation path including prefix.
+PSDIR = $(DOCDIR)
+# The HTML documentation path including prefix.
+HTMLDIR = $(DOCDIR)
+# The man page documentation path including prefix.
+MANDIR = $(DATADIR)/man
+# The Emacs LISP path including prefix.
+LISPDIR = $(DATADIR)/emacs/site-lisp
+# The locale path including prefix.
+LOCALEDIR = $(DATADIR)/locale
+# The license base path including prefix.
+LICENSEDIR = $(DATADIR)/licenses
+# The persistent variable data directory.
+VARDIR = /var
+# The persistent directory for temporary files.
+VARTMPDIR = $(VARDIR)/tmp
+# The network-common persistent variable data directory.
+COMDIR = /com
+# The network-common persistent directory for temporary files.
+COMTMPDIR = $(COMDIR)/tmp
+# The transient directory for temporary files.
+TMPDIR = /tmp
+# The transient directory for runtime files.
+RUNDIR = /run
+# The directory for site-specific configurations.
+SYSCONFDIR = /etc
+# The directory for pseudo-devices.
+DEVDIR = /dev
+# The /sys directory.
+SYSDIR = /sys
+# The /proc directory
+PROCDIR = /proc
+# The /proc/self directory
+SELFPROCDIR = $(PROCDIR)/self
+# The cache directory.
+CACHEDIR = $(VARDIR)/cache
+# The spool directory.
+SPOOLDIR = $(VARDIR)/spool
+# The empty directory.
+EMPTYDIR = $(VARDIR)/empty
+# The logfile directory.
+LOGDIR = $(VARDIR)/log
+# The state directory.
+STATEDIR = $(VARDIR)/lib
+# The highscore directory.
+GAMEDIR = $(VARDIR)/games
+# The lockfile directory.
+LOCKDIR = $(RUNDIR)/lock
+# The user skeleton directory.
+SKELDIR = $(SYSCONFDIR)/skel
+# The network-common cache directory.
+COMCACHEDIR = $(COMDIR)/cache
+# The network-common spool directory.
+COMSPOOLDIR = $(COMDIR)/spool
+# The network-common logfile directory.
+COMLOGDIR = $(COMDIR)/log
+# The network-common state directory.
+COMSTATEDIR = $(COMDIR)/lib
+# The network-common highscore directory.
+COMGAMEDIR = $(COMDIR)/games
+
+
+# FILENAME SUFFIXES:
+
+# Filename suffixes for man pages by section.
+MAN0EXT = .0
+MAN1EXT = .1
+MAN2EXT = .2
+MAN3EXT = .3
+MAN4EXT = .4
+MAN5EXT = .5
+MAN6EXT = .6
+MAN7EXT = .7
+MAN8EXT = .8
+MAN9EXT = .9
+
+
+# HELP VARIABLES:
+
+# All path variables that includes the prefix,
+# or are unaffected by the prefix.
+_ALL_DIRS = BINDIR SBINDIR LIBDIR LIBEXECDIR INCLUDEDIR DATADIR SYSDEPDATADIR DOCDIR  \
+            INFODIR DVIDIR PDFDIR PSDIR HTMLDIR MANDIR LOCALEDIR LICENSEDIR VARDIR  \
+            RESDIR VARTMPDIR COMDIR COMTMPDIR TMPDIR RUNDIR SYSCONFDIR DEVDIR SYSDIR  \
+            PROCDIR SELFPROCDIR CACHEDIR SPOOLDIR EMPTYDIR LOGDIR STATEDIR GAMEDIR \
+            LOCKDIR SKELDIR COMCACHEDIR COMSPOOLDIR COMLOGDIR COMSTATEDIR COMGAMEDIR \
+            SYSDEPRESDIR OLDINCLUDEDIR
+
+# ../, ../../, and ../../../, ignored if v is used, which if an absolute path.
+ifndef v
+__back1unless_v = ../
+__back2unless_v = ../../
+__back3unless_v = ../../../
+endif
+
+
+endif
+
diff --git a/mk/prologue.mk b/mk/prologue.mk
new file mode 100644
index 0000000..525da28
--- /dev/null
+++ b/mk/prologue.mk
@@ -0,0 +1,16 @@
+# Copyright (C) 2015  Mattias Andrée <maandree@member.fsf.org>
+# 
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.  This file is offered as-is,
+# without any warranty.
+
+
+#=== This file includes rules for automatically rebuilding the makefile. ===#
+
+
+base: Makefile
+
+Makefile: $(v)Makefile.in config.status $(v)configure $(v)mk/configure
+	./config.status
+
diff --git a/mk/tags.mk b/mk/tags.mk
new file mode 100644
index 0000000..a7c695b
--- /dev/null
+++ b/mk/tags.mk
@@ -0,0 +1,25 @@
+# Copyright (C) 2015  Mattias Andrée <maandree@member.fsf.org>
+# 
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.  This file is offered as-is,
+# without any warranty.
+
+
+#=== These rules are used for generate etags- and ctags-tablse. ===#
+
+
+# Generate etags-table.
+.PHONY: TAGS
+TAGS:
+	@$(ECHO)
+	@$(ECHO) "TAGS is not implemented. Did not see the need. Feel free to implement if you want."
+	@$(ECHO)
+
+# Generate ctags-table
+.PHONY: tags
+tags:
+	@$(ECHO)
+	@$(ECHO) "tags is not implemented. Did not see the need. Feel free to implement if you want."
+	@$(ECHO)
+
diff --git a/mk/texinfo.mk b/mk/texinfo.mk
new file mode 100644
index 0000000..e544464
--- /dev/null
+++ b/mk/texinfo.mk
@@ -0,0 +1,287 @@
+# Copyright (C) 2015  Mattias Andrée <maandree@member.fsf.org>
+# 
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.  This file is offered as-is,
+# without any warranty.
+
+
+# TODO ((support translations))
+#=== These rules are used for Texinfo manuals. ===#
+
+
+# Enables the rules:
+#   info          Build info manual
+#   dvi           Build DVI manual
+#   pdf           Build PDF manual
+#   ps            Build PostScript manual
+#   html          Build HTML manual
+#   install-info  Install info manual
+#   install-dvi   Install DVI manual
+#   install-pdf   Install PDF manual
+#   install-ps    Install PostScript manual
+#   install-html  Install HTML manual
+# 
+# This file is ignored unless
+# _HAVE_TEXINFO_MANUAL is defined.
+# 
+# This file can only build output for
+# one Texinfo manual. This manual must
+# be named doc/info/$(_PROJECT).texinfo.
+# Additional sourced are set by specifing
+# how man directories deep doc/info nests
+# in the variable _TEXINFO_DIRLEVELS.
+# 
+# If the info manual splits, specify the
+# split-number, of the file with the highest
+# split-number, in the variable _INFOPARTS.
+# 
+# If the project has a logo, _LOGO should
+# name the suffixless basename of the SVG
+# files that contains the logo. This file
+# must be located in doc/.
+# 
+# _HTML_FILES should the basename (with
+# suffix) of all files generated by `html`.
+
+
+ifdef _HAVE_TEXINFO_MANUAL
+
+
+# WHEN TO BUILD, INSTALL, AND UNINSTALL:
+
+all: info
+everything: info dvi pdf ps html
+doc: info dvi pdf ps html
+install: install-info
+install-everything: install-info install-dvi install-pdf install-ps install-html
+install-doc: install-info install-dvi install-pdf install-ps install-html
+uninstall: uninstall-info uninstall-dvi uninstall-pdf uninstall-ps uninstall-html
+
+
+# HELP VARIABLES:
+
+# Files from which the Texinfo manuals are built.
+ifdef _TEXINFO_DIRLEVELS
+ifeq ($(_TEXINFO_DIRLEVELS),1)
+__TEXI_SRC_ = *.texinfo
+endif
+ifeq ($(_TEXINFO_DIRLEVELS),2)
+__TEXI_SRC_ = *.texinfo */*.texinfo
+endif
+ifeq ($(_TEXINFO_DIRLEVELS),3)
+__TEXI_SRC_ = *.texinfo */*.texinfo */*/*.texinfo
+endif
+ifneq ($(_TEXINFO_DIRLEVELS),1)
+ifneq ($(_TEXINFO_DIRLEVELS),2)
+ifneq ($(_TEXINFO_DIRLEVELS),3)
+__TEXI_SRC_ = $(foreach W,$(shell $(SEQ) $(_TEXINFO_DIRLEVELS) | while read n; do $(ECHO) $$($(SEQ) $$n)" " | $(SED) 's/[^ ]* /\/\*/g'; done | $(XARGS) $(ECHO)),$(shell $(ECHO) $(W).texinfo | $(SED) 's/^.//'))
+endif
+endif
+endif
+__TEXI_SRC = $(foreach S,$(__TEXI_SRC_),$(foreach F,$(shell cd $(v)doc/info && $(ECHO) $(S)),aux/doc/$(F)))
+endif
+
+# Split parts of the info manual.
+ifdef _INFOPARTS
+ifneq ($(_INFOPARTS),0)
+__INFOPARTS = $(shell $(SEQ))
+endif
+endif
+
+# Flags for TeX processed output.
+__TEXINFO_FLAGS = $(TEXINFO_FLAGS)
+ifdef _LOGO
+__TEXINFO_FLAGS += '--texinfo="@set LOGO $(_LOGO)"'
+endif
+
+
+# BUILD RULES:
+
+ifdef _LOGO
+# Prepare conversion of logo.
+aux/$(_LOGO).svg: $(v)doc/$(_LOGO).svg
+	@$(PRINTF_INFO) '\e[00;01;31mCP\e[34m %s\e[00m$A\n' "$@"
+	@$(MKDIR) -p aux
+	$(Q)$(CP) $^ $@ #$Z
+	@$(ECHO_EMPTY)
+
+# Intermediate format for the logo for DVI and PostScript manuals.
+aux/$(_LOGO).ps: $(v)doc/$(_LOGO).svg
+	@$(PRINTF_INFO) '\e[00;01;31mPS\e[34m %s\e[00m$A\n' "$@"
+	@$(MKDIR) -p aux
+	$(Q)$(SVG2PS) $^ > $@ #$Z
+	@$(ECHO_EMPTY)
+
+# Logo for DVI and PostScript manuals.
+aux/$(_LOGO).eps: aux/$(_LOGO).ps
+	@$(PRINTF_INFO) '\e[00;01;31mEPS\e[34m %s\e[00m$A\n' "$@"
+	$(Q)$(PS2EPS) $^ #$Z
+	@$(ECHO_EMPTY)
+
+# Logo for PDF manual.
+aux/$(_LOGO).pdf: $(v)doc/$(_LOGO).svg
+	@$(PRINTF_INFO) '\e[00;01;31mPDF\e[34m %s\e[00m$A\n' "$@"
+	@$(MKDIR) -p aux
+	$(Q)$(SVG2PDF) $^ > $@ #$Z
+	@$(ECHO_EMPTY)
+endif
+
+# Copy texinfo files to aux/doc.
+aux/doc/%.texinfo: $(v)doc/info/%.texinfo
+	@$(PRINTF_INFO) '\e[00;01;31mCP\e[34m %s\e[00m$A\n' "$@"
+	@$(MKDIR) -p $(shell $(DIRNAME) $@)
+	$(Q)$(CP) $< $@ #$Z
+	@$(ECHO_EMPTY)
+
+# Build info manual.
+.PHONY: info
+info: $(__TEXI_SRC) bin/$(_PROJECT).info
+bin/%.info $(foreach P,$(__INFOPARTS),bin/%.info-$(P)): aux/doc/%.texinfo $(__TEXI_SRC)
+	@$(PRINTF_INFO) '\e[00;01;31mTEXI\e[34m %s\e[00m$A\n' "$@"
+	@$(MKDIR) -p bin
+	$(Q)$(MAKEINFO) $< #$Z
+	@$(PRINTF_INFO) '$A'
+	$(Q)$(MV) $*.info $@ #$Z
+	@$(ECHO_EMPTY)
+
+# Build DVI manual.
+.PHONY: dvi
+dvi: $(__TEXI_SRC) bin/$(_PROJECT).dvi
+bin/%.dvi: aux/doc/%.texinfo $(__TEXI_SRC) $(foreach L,$(_LOGO),aux/$(L).eps)
+	@$(PRINTF_INFO) '\e[00;01;31mTEXI\e[34m %s\e[00m$A\n' "$@"
+	@! $(TEST) -d aux/dvi/$* || $(RM) -rf aux/dvi/$*
+	@$(MKDIR) -p aux/dvi/$* bin
+	$(Q)cd aux/dvi/$* && $(TEXI2DVI) $(__back3unless_v)$< $(__TEXINFO_FLAGS) < /dev/null #$Z
+	@$(PRINTF_INFO) '$A'
+	$(Q)$(MV) aux/dvi/$*/$*.dvi $@ #$Z
+	@$(ECHO_EMPTY)
+
+# Build PDF manual.
+.PHONY: pdf
+pdf: $(__TEXI_SRC) bin/$(_PROJECT).pdf
+bin/%.pdf: aux/doc/%.texinfo $(__TEXI_SRC) $(foreach L,$(_LOGO),aux/$(L).pdf)
+	@$(PRINTF_INFO) '\e[00;01;31mTEXI\e[34m %s\e[00m$A\n' "$@"
+	@! $(TEST) -d aux/pdf/$* || $(RM) -rf aux/pdf/$*
+	@$(MKDIR) -p aux/pdf/$* bin
+	$(Q)cd aux/pdf/$* && $(TEXI2PDF) $(__back3unless_v)$< $(__TEXINFO_FLAGS) < /dev/null #$Z
+	@$(PRINTF_INFO) '$A'
+	$(Q)$(MV) aux/pdf/$*/$*.pdf $@ #$Z
+	@$(ECHO_EMPTY)
+
+# Build PostScript manual.
+.PHONY: ps
+ps: $(__TEXI_SRC) bin/$(_PROJECT).ps
+bin/%.ps: aux/doc/%.texinfo $(__TEXI_SRC) $(foreach L,$(_LOGO),aux/$(L).eps)
+	@$(PRINTF_INFO) '\e[00;01;31mTEXI\e[34m %s\e[00m$A\n' "$@"
+	@! $(TEST) -d aux/ps/$* || $(RM) -rf aux/ps/$*
+	@$(MKDIR) -p aux/ps/$* bin
+	$(Q)cd aux/ps/$* && $(TEXI2PS) $(__back3unless_v)$< $(__TEXINFO_FLAGS) < /dev/null #$Z
+	@$(PRINTF_INFO) '$A'
+	$(Q)$(MV) aux/ps/$*/$*.ps $@ #$Z
+	@$(ECHO_EMPTY)
+
+# Build HTML manual.
+.PHONY: html
+html: $(__TEXI_SRC) bin/html/$(_PROJECT)/index.html
+bin/html/%/index.html: aux/doc/%.texinfo $(__TEXI_SRC)
+	@$(PRINTF_INFO) '\e[00;01;31mTEXI\e[34m %s\e[00m$A\n' "$@"
+	@! $(TEST) -d bin/html/$* || $(RM) -rf bin/html/$*
+	@$(MKDIR) -p bin/html
+	$(Q)cd bin/html && $(MAKEINFO_HTML) $(__back2unless_v)$< < /dev/null #$Z
+	@$(ECHO_EMPTY)
+
+
+# INSTALL RULES:
+
+# Install info manual.
+.PHONY: install-info
+install-info: bin/$(_PROJECT).info $(foreach P,$(__INFOPARTS),bin/%.info-$(P))
+	@$(PRINTF_INFO) '\e[00;01;31mINSTALL\e[34m %s\e[00m\n' "$@"
+	$(Q)$(INSTALL_DIR) -- "$(DESTDIR)$(INFODIR)"
+	$(Q)$(INSTALL_DATA) bin/$(_PROJECT).info -- "$(DESTDIR)$(INFODIR)/$(PKGNAME).info"
+	$(Q)$(forearch P,$(__INFOPARTS),$(INSTALL_DATA) bin/$*.info-$(P) -- "$(DESTDIR)$(INFODIR)/$(PKGNAME).info-$(P)" &&) $(TRUE)
+ifdef POST_INSTALL
+	$(POST_INSTALL)
+endif
+	$(Q)if $(SHELL) -c '$(N) $(INSTALL_INFO) --version' > /dev/null 2>&1; then  \
+	  $(N)$(z) $(INSTALL_INFO) -- "${DESTDIR}${INFODIR}/$(PKGNAME).info" "${DESTDIR}${INFODIR}/dir";  \
+	else  \
+	  $(TRUE);  \
+	fi
+ifdef POST_INSTALL
+	$(NORMAL_INSTALL)
+endif
+	@$(ECHO_EMPTY)
+
+# Install DVI manual.
+.PHONY: install-dvi
+install-dvi: bin/$(_PROJECT).dvi
+	@$(PRINTF_INFO) '\e[00;01;31mINSTALL\e[34m %s\e[00m\n' "$@"
+	$(Q)$(INSTALL_DIR) -- "$(DESTDIR)$(DVIDIR)"
+	$(Q)$(INSTALL_DATA) $^ -- "$(DESTDIR)$(DVIDIR)/$(PKGNAME).dvi"
+	@$(ECHO_EMPTY)
+
+# Install PDF manual.
+.PHONY: install-pdf
+install-pdf: bin/$(_PROJECT).pdf
+	@$(PRINTF_INFO) '\e[00;01;31mINSTALL\e[34m %s\e[00m\n' "$@"
+	$(Q)$(INSTALL_DIR) -- "$(DESTDIR)$(PDFDIR)"
+	$(Q)$(INSTALL_DATA) $^ -- "$(DESTDIR)$(PDFDIR)/$(PKGNAME).pdf"
+	@$(ECHO_EMPTY)
+
+# Install PostScript manual.
+.PHONY: install-ps
+install-ps: bin/$(_PROJECT).ps
+	@$(PRINTF_INFO) '\e[00;01;31mINSTALL\e[34m %s\e[00m\n' "$@"
+	$(Q)$(INSTALL_DIR) -- "$(DESTDIR)$(PSDIR)"
+	$(Q)$(INSTALL_DATA) $^ -- "$(DESTDIR)$(PSDIR)/$(PKGNAME).ps"
+	@$(ECHO_EMPTY)
+
+# Install HTML manual.
+.PHONY: install-html
+install-html: $(foreach F,$(_HTML_FILES),bin/html/$(_PROJECT)/$(F))
+	@$(PRINTF_INFO) '\e[00;01;31mINSTALL\e[34m %s\e[00m\n' "$@"
+	$(Q)$(INSTALL_DIR) -- "$(DESTDIR)$(HTMLDIR)/$(PKGNAME)"
+	$(Q)$(INSTALL_DATA) $^ -- "$(DESTDIR)$(HTMLDIR)/$(PKGNAME)/"
+	@$(ECHO_EMPTY)
+
+
+# UNINSTALL RULES:
+
+# Uninstall info manual.
+.PHONY: uninstall-info
+uninstall-info:
+ifdef PRE_UNINSTALL
+	$(PRE_UNINSTALL)
+endif
+	-$(Q)$(N)$(a) $(INSTALL_INFO) --delete -- "${DESTDIR}${INFODIR}/$(PKGNAME).info" "${DESTDIR}${INFODIR}/dir"
+ifdef PRE_UNINSTALL
+	$(NORMAL_UNINSTALL)
+endif
+	-$(Q)$(RM) -- "$(DESTDIR)$(INFODIR)/$(PKGNAME).info" $(forearch P,$(__INFOPARTS),"$(DESTDIR)$(INFODIR)/$(PKGNAME).info-$(P)")
+
+# Uninstall DVI manual.
+.PHONY: uninstall-dvi
+uninstall-dvi:
+	-$(Q)$(RM) -- "$(DESTDIR)$(DVIDIR)/$(PKGNAME).dvi"
+
+# Uninstall PDF manual.
+.PHONY: uninstall-pdf
+uninstall-pdf:
+	-$(Q)$(RM) -- "$(DESTDIR)$(PDFDIR)/$(PKGNAME).pdf"
+
+# Uninstall PostScript manual.
+.PHONY: uninstall-ps
+uninstall-ps:
+	-$(Q)$(RM) -- "$(DESTDIR)$(PSDIR)/$(PKGNAME).ps"
+
+# Uninstall HTML manual.
+.PHONY: uninstall-html
+uninstall-html:
+	-$(Q)$(RM) -- $(foreach F,$(_HTML_FILES),"$(DESTDIR)$(HTMLDIR)/$(PKGNAME)/$(F)")
+	-$(Q)$(RM) -- "$(DESTDIR)$(HTMLDIR)/$(PKGNAME)"
+
+
+endif
+
diff --git a/mk/tools.mk b/mk/tools.mk
new file mode 100644
index 0000000..63d6d66
--- /dev/null
+++ b/mk/tools.mk
@@ -0,0 +1,163 @@
+# Copyright (C) 2015  Mattias Andrée <maandree@member.fsf.org>
+# 
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.  This file is offered as-is,
+# without any warranty.
+
+
+#=== This file defines variables for all used commands. ===#
+
+
+# Part of GNU Coreutils:
+BASENAME ?= basename
+CHGRP ?= chgrp
+CHMOD ?= chmod
+CHOWN ?= chown
+CP ?= cp
+CPLIT ?= cplit
+CUT ?= cut
+DATE ?= date
+DIRNAME ?= dirname
+ECHO ?= echo
+ENV ?= env
+EXPAND ?= expand
+EXPR ?= expr
+FALS ?= false
+FMT ?= fmt
+FOLD ?= fold
+HEAD ?= head
+INSTALL ?= install
+INSTALL_DATA ?= $(INSTALL) -m644
+INSTALL_DIR ?= $(INSTALL) -dm755
+INSTALL_PROGRAM ?= $(INSTALL) -m755
+JOIN ?= join
+LN ?= ln
+MKDIR ?= mkdir
+MKFIFO ?= mkfifo
+MKNOD ?= mknod
+MV ?= mv
+NL ?= nl
+NPROC ?= nproc
+NUMFMT ?= numfmt
+OD ?= od
+PASTE ?= paste
+PATHCHK ?= pathchk
+PR ?= pr
+PRINTF ?= printf
+READLINK ?= readlink
+REALPATH ?= realpath
+RM ?= rm
+RMDIR ?= rmdir
+SEQ ?= seq
+SLEEP ?= sleep
+SORT ?= sort
+SPLIT ?= split
+STAT ?= stat
+TAC ?= tac
+TAIL ?= tail
+TEE ?= tee
+TEST ?= test
+TOUCH ?= touch
+TR ?= tr
+TRUE ?= true
+TRUNCATE ?= truncate
+TSORT ?= tsort
+UNAME ?= uname
+UNEXPAND ?= unexpand
+UNIQ ?= uniq
+WC ?= wc
+YES ?= yes
+
+# Part of GNU help2man:
+HELP2MAN ?= help2man
+
+# Part of GNU tar:
+TAR ?= tar
+
+# Part of GNU Findutils:
+FIND ?= find
+XARGS ?= xargs
+
+# Part of GNU Grep:
+GREP ?= grep
+EGREP ?= egrep
+FGREP ?= fgrep
+
+# Part of GNU Sed:
+SED ?= sed
+
+# Part of GNU Privacy Guard:
+GPG ?= gpg
+
+# Part of Texinfo:
+MAKEINFO ?= makeinfo
+MAKEINFO_HTML ?= $(MAKEINFO) --html
+INSTALL_INFO ?= install-info
+
+# Part of Texlive-plainextra:
+TEXI2PDF ?= texi2pdf
+TEXI2DVI ?= texi2dvi
+TEXI2PS ?= texi2pdf --ps
+
+# Part of Texlive-core:
+PS2EPS ?= ps2eps
+
+# Part of librsvg:
+RSVG_CONVERT ?= rsvg-convert
+SVG2PS ?= $(RSVG_CONVERT) --format=ps
+SVG2PDF ?= $(RSVG_CONVERT) --format=pdf
+
+# Part of GNU Compiler Collection:
+CC ?= cc
+CPP ?= cpp
+CXX ?= c++
+
+# Part of GNU Binutils:
+AR ?= ar
+LD ?= ld
+RANLIB ?= ranlib
+
+# Part of GNU Bison:
+BISON ?= bison
+YACC ?= yacc
+
+# Part of Flex:
+FLEX ?= FLEX
+LEX ?= lex
+
+# Part of GNU C Library:
+LDCONFIG ?= ldconfig
+
+# Part of GNU Gettext:
+XGETTEXT ?= xgettext
+MSGFMT ?= msgfmt
+MSGMERGE ?= msgmerge
+MSGINIT ?= msginit
+
+# Part of gzip:
+GZIP ?= gzip
+GZIP_COMPRESS ?= $(GZIP) -k9
+
+# Part of bzip2:
+BZIP2 ?= bzip2
+BZIP2_COMPRESS ?= $(BZIP2) -k9
+
+# Part of xz:
+XZ ?= xz
+XZ_COMPRESS ?= $(XZ) -ke9
+
+# Part of auto-auto-complete:
+AUTO_AUTO_COMPLETE ?= auto-auto-complete
+
+
+# Change to $(TRUE) to suppress the bold red and blue output.
+ifndef PRINTF_INFO
+PRINTF_INFO = $(PRINTF)
+endif
+
+# Change to $(TRUE) to suppress empty lines
+ifndef ECHO_EMPTY
+ECHO_EMPTY = $(ECHO)
+endif
+