Adding upstream version 6.05.01.upstream/6.05.01

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

24 files changed, 1367 insertions, 0 deletions

diff --git a/share/mk/build/_.mk b/share/mk/build/_.mk
new file mode 100644
index 0000000..bdce760
--- /dev/null
+++ b/share/mk/build/_.mk
@@ -0,0 +1,52 @@
+########################################################################
+# Copyright 2021-2023, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_BUILD_INCLUDED
+MAKEFILE_BUILD_INCLUDED := 1
+
+
+include $(MAKEFILEDIR)/cmd.mk
+include $(MAKEFILEDIR)/src.mk
+
+
+builddir := .tmp
+
+SYSCONFDIR := $(srcdir)/etc
+
+_MANDIR := $(builddir)/man
+
+
+MKDIR := mkdir -p
+RM    := rm
+
+
+NONSO_MAN := $(shell $(FIND) $(MANDIR)/* -type f \
+		| $(GREP) '$(MANEXT)' \
+		| $(XARGS) $(GREP) -l '^\.TH ' \
+		| $(SORT) \
+		| $(SED) 's,:,\\:,g')
+NONSO_MDOC := $(shell $(FIND) $(MANDIR)/* -type f \
+		| $(GREP) '$(MANEXT)' \
+		| $(XARGS) $(GREP) -l '^\.Dt ' \
+		| $(SORT) \
+		| $(SED) 's,:,\\:,g')
+
+
+$(builddir)/%/:
+	+$(info MKDIR	$@)
+	+$(MKDIR) $@
+
+
+.PHONY: build
+build: build-catman build-html build-pdf build-ps build-src;
+
+.PHONY: clean
+clean:
+	$(info RM -rf	$(builddir))
+	$(RM) -rf $(builddir)
+
+
+endif  # include guard
diff --git a/share/mk/build/catman.mk b/share/mk/build/catman.mk
new file mode 100644
index 0000000..7b8766e
--- /dev/null
+++ b/share/mk/build/catman.mk
@@ -0,0 +1,89 @@
+########################################################################
+# Copyright 2021-2023, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_BUILD_CATMAN_INCLUDED
+MAKEFILE_BUILD_CATMAN_INCLUDED := 1
+
+
+include $(MAKEFILEDIR)/build/_.mk
+include $(MAKEFILEDIR)/build/groff.mk
+include $(MAKEFILEDIR)/cmd.mk
+include $(MAKEFILEDIR)/src.mk
+
+
+groff_man_ignore_grep := $(DATAROOTDIR)/lint/groff/man.ignore.grep
+
+MANWIDTH             ?= 80
+TROFF_CHECKSTYLE_LVL := 3
+NROFF_LINE_LENGTH    := $(shell $(EXPR) $(MANWIDTH) - 2)
+NROFF_OUT_DEVICE     := $(shell $(LOCALE) charmap \
+                                | $(GREP) -i 'utf-*8' >/dev/null \
+                                    && $(ECHO) utf8 \
+                                    || $(ECHO) ascii)
+
+DEFAULT_NROFFFLAGS := \
+	-T$(NROFF_OUT_DEVICE) \
+	-rLL=$(NROFF_LINE_LENGTH)n \
+	-rCHECKSTYLE=$(TROFF_CHECKSTYLE_LVL) \
+	-ww
+EXTRA_NROFFFLAGS   :=
+NROFFFLAGS         := $(DEFAULT_NROFFFLAGS) $(EXTRA_NROFFFLAGS)
+
+DEFAULT_GROTTYFLAGS := -c
+EXTRA_GROTTYFLAGS   :=
+GROTTYFLAGS         := $(DEFAULT_GROTTYFLAGS) $(EXTRA_GROTTYFLAGS)
+GROTTY              := grotty
+
+
+_CATMAN_troff   := $(patsubst $(MANDIR)/%,$(_MANDIR)/%.cat.troff,$(NONSO_MAN) $(NONSO_MDOC))
+_CATMAN_MAN_set := $(patsubst $(MANDIR)/%,$(_MANDIR)/%.cat.set,$(NONSO_MAN))
+_CATMAN_MDOC_set:= $(patsubst $(MANDIR)/%,$(_MANDIR)/%.cat.set,$(NONSO_MDOC))
+_CATMAN         := $(patsubst $(MANDIR)/%,$(_MANDIR)/%.cat,$(NONSO_MAN) $(NONSO_MDOC))
+
+
+$(_CATMAN_troff): %.cat.troff: %.eqn | $$(@D)/
+	$(info	EQN	$@)
+	! ($(EQN) -T$(NROFF_OUT_DEVICE) $(EQNFLAGS) <$< 2>&1 >$@) \
+	| $(GREP) ^ >&2
+
+$(_CATMAN_MAN_set): %.cat.set: %.cat.troff $(groff_man_ignore_grep) | $$(@D)/
+	$(info	TROFF	$@)
+	! ($(TROFF) $(TROFFFLAGS_MAN) $(NROFFFLAGS) <$< 2>&1 >$@ \
+	   | $(GREP) -v -f '$(groff_man_ignore_grep)' \
+	   ||:; \
+	) \
+	| $(GREP) ^ >&2
+
+$(_CATMAN_MDOC_set): %.cat.set: %.cat.troff | $$(@D)/
+	$(info	TROFF	$@)
+	! ($(TROFF) $(TROFFFLAGS_MDOC) $(NROFFFLAGS) <$< 2>&1 >$@) \
+	| $(GREP) ^ >&2
+
+$(_CATMAN): %.cat: %.cat.set | $$(@D)/
+	$(info	GROTTY	$@)
+	$(GROTTY) $(GROTTYFLAGS) <$< >$@
+
+
+.PHONY: build-catman-eqn
+build-catman-eqn: $(_CATMAN_troff);
+
+.PHONY: build-catman-troff-man
+build-catman-troff-man: $(_CATMAN_MAN_set);
+
+.PHONY: build-catman-troff-mdoc
+build-catman-troff-mdoc: $(_CATMAN_MDOC_set);
+
+.PHONY: build-catman-troff
+build-catman-troff: build-catman-troff-man build-catman-troff-mdoc;
+
+.PHONY: build-catman-grotty
+build-catman-grotty: $(_CATMAN);
+
+.PHONY: build-catman
+build-catman: build-catman-grotty;
+
+
+endif  # include guard
diff --git a/share/mk/build/groff.mk b/share/mk/build/groff.mk
new file mode 100644
index 0000000..2a5a3de
--- /dev/null
+++ b/share/mk/build/groff.mk
@@ -0,0 +1,39 @@
+########################################################################
+# Copyright 2021-2023, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_BUILD_GROFF_INCLUDED
+MAKEFILE_BUILD_GROFF_INCLUDED := 1
+
+
+include $(MAKEFILEDIR)/build/_.mk
+include $(MAKEFILEDIR)/cmd.mk
+include $(MAKEFILEDIR)/src.mk
+
+
+DEFAULT_EQNFLAGS :=
+EXTRA_EQNFLAGS   :=
+EQNFLAGS         := $(DEFAULT_EQNFLAGS) $(EXTRA_EQNFLAGS)
+EQN              := eqn
+
+DEFAULT_TROFFFLAGS   := -wbreak
+EXTRA_TROFFFLAGS     :=
+TROFFFLAGS           := $(DEFAULT_TROFFFLAGS) $(EXTRA_TROFFFLAGS)
+TROFF                := troff
+
+DEFAULT_TROFFFLAGS_MAN := \
+	$(TROFFFLAGS) \
+	-man
+EXTRA_TROFFFLAGS_MAN   :=
+TROFFFLAGS_MAN         := $(DEFAULT_TROFFFLAGS_MAN) $(EXTRA_TROFFFLAGS_MAN)
+
+DEFAULT_TROFFFLAGS_MDOC := \
+	$(TROFFFLAGS) \
+	-mdoc
+EXTRA_TROFFFLAGS_MDOC   :=
+TROFFFLAGS_MDOC         := $(DEFAULT_TROFFFLAGS_MDOC) $(EXTRA_TROFFFLAGS_MDOC)
+
+
+endif  # include guard
diff --git a/share/mk/build/html.mk b/share/mk/build/html.mk
new file mode 100644
index 0000000..084654d
--- /dev/null
+++ b/share/mk/build/html.mk
@@ -0,0 +1,42 @@
+########################################################################
+# Copyright 2021-2022, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_BUILD_HTML_INCLUDED
+MAKEFILE_BUILD_HTML_INCLUDED := 1
+
+
+include $(MAKEFILEDIR)/build/_.mk
+include $(MAKEFILEDIR)/cmd.mk
+include $(MAKEFILEDIR)/src.mk
+
+
+htmlext  := .html
+_HTMLDIR := $(builddir)/html
+
+
+DEFAULT_MAN2HTMLFLAGS :=
+EXTRA_MAN2HTMLFLAGS   :=
+MAN2HTMLFLAGS         := $(DEFAULT_MAN2HTMLFLAGS) $(EXTRA_MAN2HTMLFLAGS)
+MAN2HTML              := man2html
+
+
+_HTMLPAGES := $(patsubst $(MANDIR)/%,$(_HTMLDIR)/%$(htmlext),$(MANPAGES))
+
+
+# Use with
+#  make MAN2HTMLFLAGS=whatever html
+# The sed removes the lines "Content-type: text/html\n\n"
+$(_HTMLPAGES): $(_HTMLDIR)/%$(htmlext): $(MANDIR)/% | $$(@D)/
+	$(info MAN2HTML	$@)
+	$(MAN2HTML) $(MAN2HTMLFLAGS) $< \
+	| $(SED) -e 1,2d >$@
+
+
+.PHONY: build-html html
+build-html html: $(_HTMLPAGES);
+
+
+endif  # include guard
diff --git a/share/mk/build/pdf.mk b/share/mk/build/pdf.mk
new file mode 100644
index 0000000..380c6c6
--- /dev/null
+++ b/share/mk/build/pdf.mk
@@ -0,0 +1,68 @@
+########################################################################
+# Copyright 2023, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_BUILD_PDF_INCLUDED
+MAKEFILE_BUILD_PDF_INCLUDED := 1
+
+
+include $(MAKEFILEDIR)/build/_.mk
+include $(MAKEFILEDIR)/build/groff.mk
+include $(MAKEFILEDIR)/cmd.mk
+include $(MAKEFILEDIR)/src.mk
+
+
+DEFAULT_GROPDFFLAGS :=
+EXTRA_GROPDFFLAGS   :=
+GROPDFFLAGS         := $(DEFAULT_GROPDFFLAGS) $(EXTRA_GROPDFFLAGS)
+GROPDF              := gropdf
+
+
+_PDFMAN_troff   := $(patsubst $(MANDIR)/%,$(_MANDIR)/%.pdf.troff,$(NONSO_MAN) $(NONSO_MDOC))
+_PDFMAN_MAN_set := $(patsubst $(MANDIR)/%,$(_MANDIR)/%.pdf.set,$(NONSO_MAN))
+_PDFMAN_MDOC_set:= $(patsubst $(MANDIR)/%,$(_MANDIR)/%.pdf.set,$(NONSO_MDOC))
+_PDFMAN         := $(patsubst $(MANDIR)/%,$(_MANDIR)/%.pdf,$(NONSO_MAN) $(NONSO_MDOC))
+
+
+$(_PDFMAN_troff): %.pdf.troff: %.eqn | $$(@D)/
+	$(info	EQN	$@)
+	! ($(EQN) -Tpdf $(EQNFLAGS) <$< 2>&1 >$@) \
+	| $(GREP) ^ >&2
+
+$(_PDFMAN_MAN_set): %.pdf.set: %.pdf.troff | $$(@D)/
+	$(info	TROFF	$@)
+	! ($(TROFF) -Tpdf $(TROFFFLAGS_MAN) <$< 2>&1 >$@) \
+	| $(GREP) ^ >&2
+
+$(_PDFMAN_MDOC_set): %.pdf.set: %.pdf.troff | $$(@D)/
+	$(info	TROFF	$@)
+	! ($(TROFF) -Tpdf $(TROFFFLAGS_MDOC) <$< 2>&1 >$@) \
+	| $(GREP) ^ >&2
+
+$(_PDFMAN): %.pdf: %.pdf.set | $$(@D)/
+	$(info	GROPDF	$@)
+	$(GROPDF) $(GROPDFFLAGS) <$< >$@
+
+
+.PHONY: build-pdf-eqn
+build-pdf-eqn: $(_PDFMAN_troff);
+
+.PHONY: build-pdf-troff-man
+build-pdf-troff-man: $(_PDFMAN_MAN_set);
+
+.PHONY: build-pdf-troff-mdoc
+build-pdf-troff-mdoc: $(_PDFMAN_MDOC_set);
+
+.PHONY: build-pdf-troff
+build-pdf-troff: build-pdf-troff-man build-pdf-troff-mdoc;
+
+.PHONY: build-pdf-gropdf
+build-pdf-gropdf: $(_PDFMAN);
+
+.PHONY: build-pdf
+build-pdf: build-pdf-gropdf;
+
+
+endif  # include guard
diff --git a/share/mk/build/pre.mk b/share/mk/build/pre.mk
new file mode 100644
index 0000000..4c458fa
--- /dev/null
+++ b/share/mk/build/pre.mk
@@ -0,0 +1,47 @@
+########################################################################
+# Copyright 2021-2023, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_BUILD_PRE_INCLUDED
+MAKEFILE_BUILD_PRE_INCLUDED := 1
+
+
+include $(MAKEFILEDIR)/build/_.mk
+include $(MAKEFILEDIR)/cmd.mk
+include $(MAKEFILEDIR)/src.mk
+
+
+DEFAULT_PRECONVFLAGS :=
+EXTRA_PRECONVFLAGS   :=
+PRECONVFLAGS         := $(DEFAULT_PRECONVFLAGS) $(EXTRA_PRECONVFLAGS)
+PRECONV              := preconv
+
+TBL := tbl
+
+
+_MAN_tbl := $(patsubst $(MANDIR)/%,$(_MANDIR)/%.tbl,$(NONSO_MAN) $(NONSO_MDOC))
+_MAN_eqn := $(patsubst $(MANDIR)/%,$(_MANDIR)/%.eqn,$(NONSO_MAN) $(NONSO_MDOC))
+
+
+$(_MAN_tbl): $(_MANDIR)/%.tbl: $(MANDIR)/% | $$(@D)/
+	$(info	PRECONV	$@)
+	$(PRECONV) $(PRECONVFLAGS) $< >$@
+
+$(_MAN_eqn): %.eqn: %.tbl | $$(@D)/
+	$(info	TBL	$@)
+	$(TBL) <$< >$@
+
+
+.PHONY: build-pre-preconv
+build-pre-preconv: $(_MAN_tbl);
+
+.PHONY: build-pre-tbl
+build-pre-tbl: $(_MAN_eqn);
+
+.PHONY: build-pre
+build-pre: build-pre-tbl;
+
+
+endif  # include guard
diff --git a/share/mk/build/ps.mk b/share/mk/build/ps.mk
new file mode 100644
index 0000000..5b29dc1
--- /dev/null
+++ b/share/mk/build/ps.mk
@@ -0,0 +1,68 @@
+########################################################################
+# Copyright 2023, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_BUILD_PS_INCLUDED
+MAKEFILE_BUILD_PS_INCLUDED := 1
+
+
+include $(MAKEFILEDIR)/build/_.mk
+include $(MAKEFILEDIR)/build/groff.mk
+include $(MAKEFILEDIR)/cmd.mk
+include $(MAKEFILEDIR)/src.mk
+
+
+DEFAULT_GROPSFLAGS :=
+EXTRA_GROPSFLAGS   :=
+GROPSFLAGS         := $(DEFAULT_GROPSFLAGS) $(EXTRA_GROPSFLAGS)
+GROPS              := grops
+
+
+_PSMAN_troff   := $(patsubst $(MANDIR)/%,$(_MANDIR)/%.ps.troff,$(NONSO_MAN) $(NONSO_MDOC))
+_PSMAN_MAN_set := $(patsubst $(MANDIR)/%,$(_MANDIR)/%.ps.set,$(NONSO_MAN))
+_PSMAN_MDOC_set:= $(patsubst $(MANDIR)/%,$(_MANDIR)/%.ps.set,$(NONSO_MDOC))
+_PSMAN         := $(patsubst $(MANDIR)/%,$(_MANDIR)/%.ps,$(NONSO_MAN) $(NONSO_MDOC))
+
+
+$(_PSMAN_troff): %.ps.troff: %.eqn | $$(@D)/
+	$(info	EQN	$@)
+	! ($(EQN) -Tps $(EQNFLAGS) <$< 2>&1 >$@) \
+	| $(GREP) ^ >&2
+
+$(_PSMAN_MAN_set): %.ps.set: %.ps.troff | $$(@D)/
+	$(info	TROFF	$@)
+	! ($(TROFF) -Tps $(TROFFFLAGS_MAN) <$< 2>&1 >$@) \
+	| $(GREP) ^ >&2
+
+$(_PSMAN_MDOC_set): %.ps.set: %.ps.troff | $$(@D)/
+	$(info	TROFF	$@)
+	! ($(TROFF) -Tps $(TROFFFLAGS_MDOC) <$< 2>&1 >$@) \
+	| $(GREP) ^ >&2
+
+$(_PSMAN): %.ps: %.ps.set | $$(@D)/
+	$(info	GROPS	$@)
+	$(GROPS) $(GROPSFLAGS) <$< >$@
+
+
+.PHONY: build-ps-eqn
+build-ps-eqn: $(_PSMAN_troff);
+
+.PHONY: build-ps-troff-man
+build-ps-troff-man: $(_PSMAN_MAN_set);
+
+.PHONY: build-ps-troff-mdoc
+build-ps-troff-mdoc: $(_PSMAN_MDOC_set);
+
+.PHONY: build-ps-troff
+build-ps-troff: build-ps-troff-man build-ps-troff-mdoc;
+
+.PHONY: build-ps-grops
+build-ps-grops: $(_PSMAN);
+
+.PHONY: build-ps
+build-ps: build-ps-grops;
+
+
+endif  # include guard
diff --git a/share/mk/build/src.mk b/share/mk/build/src.mk
new file mode 100644
index 0000000..365c256
--- /dev/null
+++ b/share/mk/build/src.mk
@@ -0,0 +1,117 @@
+########################################################################
+# Copyright 2021-2023, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_BUILD_SRC_INCLUDED
+MAKEFILE_BUILD_SRC_INCLUDED := 1
+
+
+include $(MAKEFILEDIR)/build/_.mk
+include $(MAKEFILEDIR)/cmd.mk
+include $(MAKEFILEDIR)/src.mk
+include $(MAKEFILEDIR)/verbose.mk
+
+
+PKGCONF_LIBS := libbsd-overlay
+
+
+DEFAULT_CPPFLAGS := $(shell $(PKGCONF) --cflags $(PKGCONF_LIBS) $(HIDE_ERR))
+EXTRA_CPPFLAGS   :=
+CPPFLAGS         := $(DEFAULT_CPPFLAGS) $(EXTRA_CPPFLAGS)
+
+DEFAULT_CFLAGS := \
+	-std=gnu17 \
+	-Wall \
+	-Wextra \
+	-Wstrict-prototypes \
+	-Wdeclaration-after-statement \
+	-Werror \
+	-Wno-error=unused-parameter \
+	-Wno-error=sign-compare \
+	-Wno-error=format \
+	-Wno-error=uninitialized
+	#-Wno-error=declaration-after-statement
+EXTRA_CFLAGS   :=
+CFLAGS         := $(DEFAULT_CFLAGS) $(EXTRA_CFLAGS)
+
+DEFAULT_LDFLAGS := \
+	-Wl,--as-needed \
+	-Wl,--no-allow-shlib-undefined \
+	-Wl,--no-copy-dt-needed-entries \
+	-Wl,--no-undefined \
+	$(shell $(PKGCONF) --libs-only-L $(PKGCONF_LIBS) $(HIDE_ERR)) \
+	$(shell $(PKGCONF) --libs-only-other $(PKGCONF_LIBS) $(HIDE_ERR))
+EXTRA_LDFLAGS   :=
+LDFLAGS         := $(DEFAULT_LDFLAGS) $(EXTRA_LDFLAGS)
+
+DEFAULT_LDLIBS := \
+	-lc \
+	$(shell $(PKGCONF) --libs-only-l $(PKGCONF_LIBS) $(HIDE_ERR))
+EXTRA_LDLIBS   :=
+LDLIBS         := $(DEFAULT_LDLIBS) $(EXTRA_LDLIBS)
+
+
+CC  := cc
+LD  := $(CC) $(CFLAGS)
+
+
+_SRCPAGEDIRS   := $(patsubst $(MANDIR)/%,$(_MANDIR)/%.d/,$(NONSO_MAN))
+
+_UNITS_src_src := $(patsubst $(MANDIR)/%,$(_MANDIR)/%,$(shell \
+		$(FIND) $(MANDIR)/* -type f \
+		| $(GREP) '$(MANEXT)' \
+		| $(XARGS) $(GREP) -H '^\.\\" SRC BEGIN ' \
+		| $(SED) 's,:\.\\" SRC BEGIN (,.d/,' \
+		| $(SED) 's/)//' \
+		| $(SORT) \
+		| $(SED) 's,:,\\:,g'))
+_UNITS_src_h   := $(filter %.h,$(_UNITS_src_src))
+_UNITS_src_c   := $(filter %.c,$(_UNITS_src_src))
+_UNITS_src_o   := $(patsubst %.c,%.o,$(_UNITS_src_c))
+_UNITS_src_bin := $(patsubst %.c,%,$(_UNITS_src_c))
+
+
+$(_SRCPAGEDIRS): $(_MANDIR)/%.d/: $(MANDIR)/%
+	+$(info MKDIR	$@)
+	+$(MKDIR) $@
+	+touch $@
+
+$(_UNITS_src_src): $$(patsubst $(_MANDIR)/%.d,$(MANDIR)/%,$$(@D)) | $$(@D)/
+$(_UNITS_src_c):   $$(filter $$(@D)/%.h,$(_UNITS_src_h))
+$(_UNITS_src_src):
+	$(info SED	$@)
+	<$< \
+	$(SED) -n \
+		-e '/^\.TH/,/^\.SH/{/^\.SH/!p}' \
+		-e '/^\.SH EXAMPLES/p' \
+		-e "/^\... SRC BEGIN ($(@F))$$/,/^\... SRC END$$/p" \
+	| $(MANDOC) -Tutf8 \
+	| $(SED) '/^[^ ]/d' \
+	| $(SED) 's/^       //' \
+	>$@
+
+$(_UNITS_src_o): %.o: %.c
+	$(info CC	$@)
+	$(CC) -c $(CPPFLAGS) $(CFLAGS) -o $@ $<
+
+$(_UNITS_src_bin): %: %.o
+	$(info LD	$@)
+	$(LD) $(LDFLAGS) -o $@ $< $(LDLIBS)
+
+
+.PHONY: build-src-c
+build-src-c:   $(_UNITS_src_c);
+
+.PHONY: build-src-cc
+build-src-cc:  $(_UNITS_src_o);
+
+.PHONY: build-src-ld
+build-src-ld:  $(_UNITS_src_bin);
+
+.PHONY: build-src
+build-src: build-src-ld
+
+
+endif  # include guard
diff --git a/share/mk/check/_.mk b/share/mk/check/_.mk
new file mode 100644
index 0000000..6326d1f
--- /dev/null
+++ b/share/mk/check/_.mk
@@ -0,0 +1,18 @@
+########################################################################
+# Copyright 2023, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_CHECK_INCLUDED
+MAKEFILE_CHECK_INCLUDED := 1
+
+
+check := check-catman
+
+
+.PHONY: check
+check: $(check);
+
+
+endif  # include guard
diff --git a/share/mk/check/catman.mk b/share/mk/check/catman.mk
new file mode 100644
index 0000000..8a0d3b6
--- /dev/null
+++ b/share/mk/check/catman.mk
@@ -0,0 +1,51 @@
+########################################################################
+# Copyright 2021-2023, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_CHECK_CATMAN_INCLUDED
+MAKEFILE_CHECK_CATMAN_INCLUDED := 1
+
+
+include $(MAKEFILEDIR)/cmd.mk
+include $(MAKEFILEDIR)/build/_.mk
+include $(MAKEFILEDIR)/build/catman.mk
+include $(MAKEFILEDIR)/check/_.mk
+include $(MAKEFILEDIR)/src.mk
+
+
+DEFAULT_COLFLAGS := \
+	-b \
+	-p \
+	-x
+EXTRA_COLFLAGS   :=
+COLFLAGS         := $(DEFAULT_COLFLAGS) $(EXTRA_COLFLAGS)
+COL              := col
+
+
+_CHECK_catman_grep := $(patsubst $(MANDIR)/%,$(_MANDIR)/%.cat.grep,$(NONSO_MAN) $(NONSO_MDOC))
+_CHECK_catman := $(patsubst $(MANDIR)/%,$(_MANDIR)/%.check-catman.touch,$(NONSO_MAN) $(NONSO_MDOC))
+
+
+$(_CHECK_catman_grep): %.grep: % | $$(@D)/
+	$(info	COL	$@)
+	$(COL) $(COLFLAGS) <$< >$@
+
+$(_CHECK_catman): %.check-catman.touch: %.cat.grep | $$(@D)/
+	$(info	GREP	$@)
+	! $(GREP) -n '.\{$(MANWIDTH)\}.' $< /dev/null >&2
+	touch $@
+
+
+.PHONY: check-catman-col
+check-catman-col: $(_CHECK_catman_grep);
+
+.PHONY: check-catman-grep
+check-catman-grep: $(_CHECK_catman);
+
+.PHONY: check-catman
+check-catman: check-catman-grep;
+
+
+endif  # include guard
diff --git a/share/mk/cmd.mk b/share/mk/cmd.mk
new file mode 100644
index 0000000..aa7c07c
--- /dev/null
+++ b/share/mk/cmd.mk
@@ -0,0 +1,40 @@
+########################################################################
+# Copyright 2022, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_CMD_INCLUDED
+MAKEFILE_CMD_INCLUDED := 1
+
+
+BZIP2      := bzip2
+CP         := cp
+ECHO       := echo
+EXPR       := expr
+FIND       := find
+GIT        := git
+GREP       := grep
+GZIP       := gzip
+HEAD       := head
+INSTALL    := install
+LN         := ln
+LOCALE     := locale
+LZIP       := lzip
+MANDOC     := mandoc
+PKGCONF    := pkgconf
+SED        := sed
+SORT       := sort
+SPONGE     := sponge
+TAC        := tac
+TAIL       := tail
+TAR        := tar
+TEST       := test
+XARGS      := xargs
+XZ         := xz
+
+INSTALL_DATA := $(INSTALL) -m 644
+INSTALL_DIR  := $(INSTALL) -m 755 -d
+
+
+endif  # include guard
diff --git a/share/mk/compress.mk b/share/mk/compress.mk
new file mode 100644
index 0000000..6502930
--- /dev/null
+++ b/share/mk/compress.mk
@@ -0,0 +1,40 @@
+########################################################################
+# Copyright 2023 Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_COMPRESS_INCLUDED
+MAKEFILE_COMPRESS_INCLUDED := 1
+
+
+Z :=
+ifeq ($(Z),)
+else ifeq ($(Z),.bz2)
+else ifeq ($(Z),.gz)
+else ifeq ($(Z),.lz)
+else ifeq ($(Z),.xz)
+else
+$(warning "Z": "$(Z)")
+$(error Valid values for "Z": ["", ".bz2", ".gz", ".lz", ".xz"])
+endif
+
+
+DEFAULT_BZIP2FLAGS :=
+EXTRA_BZIP2FLAGS   :=
+BZIP2FLAGS         := $(DEFAULT_BZIP2FLAGS) $(EXTRA_BZIP2FLAGS)
+
+DEFAULT_GZIPFLAGS  :=
+EXTRA_GZIPFLAGS    :=
+GZIPFLAGS          := $(DEFAULT_GZIPFLAGS) $(EXTRA_GZIPFLAGS)
+
+DEFAULT_LZIPFLAGS  :=
+EXTRA_LZIPFLAGS    :=
+LZIPFLAGS          := $(DEFAULT_LZIPFLAGS) $(EXTRA_LZIPFLAGS)
+
+DEFAULT_XZFLAGS    :=
+EXTRA_XZFLAGS      :=
+XZFLAGS            := $(DEFAULT_XZFLAGS) $(EXTRA_XZFLAGS)
+
+
+endif  # include guard
diff --git a/share/mk/dist.mk b/share/mk/dist.mk
new file mode 100644
index 0000000..b18197d
--- /dev/null
+++ b/share/mk/dist.mk
@@ -0,0 +1,96 @@
+########################################################################
+# Copyright 2021-2022, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_DIST_INCLUDED
+MAKEFILE_DIST_INCLUDED := 1
+
+
+include $(MAKEFILEDIR)/build/_.mk
+include $(MAKEFILEDIR)/cmd.mk
+include $(MAKEFILEDIR)/compress.mk
+include $(MAKEFILEDIR)/install/_.mk
+include $(MAKEFILEDIR)/version.mk
+include $(MAKEFILEDIR)/verbose.mk
+
+
+_DISTDIR := $(builddir)/dist
+
+
+DEFAULT_TARFLAGS := \
+	--sort=name \
+	--owner=root:0 \
+	--group=root:0 \
+	--mtime='$(DISTDATE)'
+EXTRA_TARFLAGS   :=
+TARFLAGS         := $(DEFAULT_TARFLAGS) $(EXTRA_TARFLAGS)
+
+
+DISTFILES   := $(shell $(GIT) ls-files $(HIDE_ERR) \
+			| $(SED) 's,^,$(srcdir)/,' \
+			| $(SED) 's,:,\\:,g')
+_DISTFILES  := $(patsubst $(srcdir)/%,$(_DISTDIR)/%,$(DISTFILES))
+_DISTPAGES  := $(filter     $(_DISTDIR)/man%,$(_DISTFILES))
+_DISTOTHERS := $(filter-out $(_DISTDIR)/man%,$(_DISTFILES))
+
+DISTFILE    := $(builddir)/$(DISTNAME).tar
+compression := bz2 gz lz xz
+dist        := $(foreach x,$(compression),dist-$(x))
+
+
+$(builddir)/dist/%/:
+	+$(info INSTALL	$@)
+	+$(INSTALL_DIR) $@
+
+
+$(_DISTPAGES): $(_DISTDIR)/man%: $(srcdir)/man% | $$(@D)/
+	$(info INSTALL	$@)
+	$(INSTALL_DATA) -T $< $@
+	$(SED) -i '/^.TH/s/(unreleased)/$(DISTVERSION)/' $@
+	$(SED) -i "/^.TH/s/(date)/$$(git log --format=%cs -1 -- $< $(HIDE_ERR))/" $@
+
+$(_DISTOTHERS): $(_DISTDIR)/%: $(srcdir)/% | $$(@D)/
+	$(info CP	$@)
+	$(CP) -T $< $@
+
+
+$(DISTFILE): $(_DISTFILES) | $$(@D)/
+	$(info TAR	$@)
+	$(TAR) $(TARFLAGS) -cf $@ -T /dev/null
+	$(GIT) ls-files \
+	| $(SED) 's,^,$(_DISTDIR)/,' \
+	| $(XARGS) $(TAR) $(TARFLAGS) -rf $@ -C $(srcdir) \
+		--transform 's,^$(_DISTDIR),$(DISTNAME),'
+
+$(DISTFILE).bz2: %.bz2: % | $$(@D)/
+	$(info BZIP2	$@)
+	$(BZIP2) $(BZIP2FLAGS) -kf $<
+	touch $@
+
+$(DISTFILE).gz: %.gz: % | $$(@D)/
+	$(info GZIP	$@)
+	$(GZIP) $(GZIPFLAGS) -knf $<
+
+$(DISTFILE).lz: %.lz: % | $$(@D)/
+	$(info LZIP	$@)
+	$(LZIP) $(LZIPFLAGS) -kf $<
+	touch $@
+
+$(DISTFILE).xz: %.xz: % | $$(@D)/
+	$(info XZ	$@)
+	$(XZ) $(XZFLAGS) -kf $<
+
+
+.PHONY: dist-tar
+dist-tar: $(DISTFILE);
+
+.PHONY: $(dist)
+$(dist): dist-%: $(DISTFILE).%;
+
+.PHONY: dist
+dist: $(dist);
+
+
+endif  # include guard
diff --git a/share/mk/install/_.mk b/share/mk/install/_.mk
new file mode 100644
index 0000000..751ab97
--- /dev/null
+++ b/share/mk/install/_.mk
@@ -0,0 +1,37 @@
+########################################################################
+# Copyright 2021-2022, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_INSTALL_INCLUDED
+MAKEFILE_INSTALL_INCLUDED := 1
+
+
+include $(MAKEFILEDIR)/cmd.mk
+
+
+DESTDIR :=
+prefix  := /usr/local
+
+datarootdir := $(prefix)/share
+docdir      := $(datarootdir)/doc
+
+
+$(DESTDIR)%/:
+	+$(info INSTALL	$@)
+	+$(INSTALL_DIR) $@
+
+%-rm:
+	$(info RM	$*)
+	$(RM) $*
+
+
+.PHONY: install
+install: install-man;
+
+.PHONY: uninstall
+uninstall: uninstall-man;
+
+
+endif  # include guard
diff --git a/share/mk/install/html.mk b/share/mk/install/html.mk
new file mode 100644
index 0000000..97e00ce
--- /dev/null
+++ b/share/mk/install/html.mk
@@ -0,0 +1,36 @@
+########################################################################
+# Copyright 2021-2022, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_INSTALL_HTML_INCLUDED
+MAKEFILE_INSTALL_HTML_INCLUDED := 1
+
+
+include $(MAKEFILEDIR)/build/html.mk
+include $(MAKEFILEDIR)/install/_.mk
+
+
+htmldir  := $(docdir)
+htmldir_ := $(htmldir)/man
+_htmldir := $(DESTDIR)$(htmldir_)
+
+
+_htmlpages      := $(patsubst $(_HTMLDIR)/%,$(_htmldir)/%,$(_HTMLPAGES))
+_htmlpages_rm   := $(addsuffix -rm,$(wildcard $(_htmlpages)))
+
+
+$(_htmlpages): $(_htmldir)/%: $(_HTMLDIR)/% | $$(@D)/
+	$(info INSTALL	$@)
+	$(INSTALL_DATA) -T $< $@
+
+
+.PHONY: install-html
+install-html: $(_htmlpages);
+
+.PHONY: uninstall-html
+uninstall-html: $(_htmlpages_rm);
+
+
+endif  # include guard
diff --git a/share/mk/install/man.mk b/share/mk/install/man.mk
new file mode 100644
index 0000000..a135788
--- /dev/null
+++ b/share/mk/install/man.mk
@@ -0,0 +1,202 @@
+########################################################################
+# Copyright 2021-2023, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_INSTALL_MAN_INCLUDED
+MAKEFILE_INSTALL_MAN_INCLUDED := 1
+
+
+include $(MAKEFILEDIR)/cmd.mk
+include $(MAKEFILEDIR)/compress.mk
+include $(MAKEFILEDIR)/install/_.mk
+include $(MAKEFILEDIR)/src.mk
+
+
+LINK_PAGES := .so
+ifeq ($(LINK_PAGES),.so)
+else ifeq ($(LINK_PAGES),symlink)
+else
+$(warning "LINK_PAGES": "$(LINK_PAGES)")
+$(error Valid values for "LINK_PAGES": [".so", "symlink"])
+endif
+
+
+mandir      := $(datarootdir)/man
+man1dir     := $(mandir)/man1
+man2dir     := $(mandir)/man2
+man2typedir := $(mandir)/man2type
+man3dir     := $(mandir)/man3
+man3constdir:= $(mandir)/man3const
+man3headdir := $(mandir)/man3head
+man3typedir := $(mandir)/man3type
+man4dir     := $(mandir)/man4
+man5dir     := $(mandir)/man5
+man6dir     := $(mandir)/man6
+man7dir     := $(mandir)/man7
+man8dir     := $(mandir)/man8
+man1ext     := .1$(Z)
+man2ext     := .2$(Z)
+man2typeext := .2type$(Z)
+man3ext     := .3$(Z)
+man3constext:= .3const$(Z)
+man3headext := .3head$(Z)
+man3typeext := .3type$(Z)
+man4ext     := .4$(Z)
+man5ext     := .5$(Z)
+man6ext     := .6$(Z)
+man7ext     := .7$(Z)
+man8ext     := .8$(Z)
+
+
+_mandir       := $(DESTDIR)$(mandir)
+_man1dir      := $(DESTDIR)$(man1dir)
+_man2dir      := $(DESTDIR)$(man2dir)
+_man2typedir  := $(DESTDIR)$(man2typedir)
+_man3dir      := $(DESTDIR)$(man3dir)
+_man3constdir := $(DESTDIR)$(man3constdir)
+_man3headdir  := $(DESTDIR)$(man3headdir)
+_man3typedir  := $(DESTDIR)$(man3typedir)
+_man4dir      := $(DESTDIR)$(man4dir)
+_man5dir      := $(DESTDIR)$(man5dir)
+_man6dir      := $(DESTDIR)$(man6dir)
+_man7dir      := $(DESTDIR)$(man7dir)
+_man8dir      := $(DESTDIR)$(man8dir)
+
+_man1pages      := $(patsubst $(MANDIR)/man1/%,$(_man1dir)/%$(Z),$(MAN1PAGES))
+_man2pages      := $(patsubst $(MANDIR)/man2/%,$(_man2dir)/%$(Z),$(MAN2PAGES))
+_man2typepages  := $(patsubst $(MANDIR)/man2type/%,$(_man2typedir)/%$(Z),$(MAN2TYPEPAGES))
+_man3pages      := $(patsubst $(MANDIR)/man3/%,$(_man3dir)/%$(Z),$(MAN3PAGES))
+_man3constpages := $(patsubst $(MANDIR)/man3const/%,$(_man3constdir)/%$(Z),$(MAN3CONSTPAGES))
+_man3headpages  := $(patsubst $(MANDIR)/man3head/%,$(_man3headdir)/%$(Z),$(MAN3HEADPAGES))
+_man3typepages  := $(patsubst $(MANDIR)/man3type/%,$(_man3typedir)/%$(Z),$(MAN3TYPEPAGES))
+_man4pages      := $(patsubst $(MANDIR)/man4/%,$(_man4dir)/%$(Z),$(MAN4PAGES))
+_man5pages      := $(patsubst $(MANDIR)/man5/%,$(_man5dir)/%$(Z),$(MAN5PAGES))
+_man6pages      := $(patsubst $(MANDIR)/man6/%,$(_man6dir)/%$(Z),$(MAN6PAGES))
+_man7pages      := $(patsubst $(MANDIR)/man7/%,$(_man7dir)/%$(Z),$(MAN7PAGES))
+_man8pages      := $(patsubst $(MANDIR)/man8/%,$(_man8dir)/%$(Z),$(MAN8PAGES))
+_manpages       := $(_man1pages) \
+                   $(_man2pages) $(_man2typepages) \
+                   $(_man3pages) $(_man3constpages) $(_man3headpages) $(_man3typepages) \
+                   $(_man4pages) \
+                   $(_man5pages) \
+                   $(_man6pages) \
+                   $(_man7pages) \
+                   $(_man8pages)
+
+_man1pages_rm     := $(addsuffix -rm,$(wildcard $(_man1pages)))
+_man2pages_rm     := $(addsuffix -rm,$(wildcard $(_man2pages)))
+_man2typepages_rm := $(addsuffix -rm,$(wildcard $(_man2typepages)))
+_man3pages_rm     := $(addsuffix -rm,$(wildcard $(_man3pages)))
+_man3constpages_rm:= $(addsuffix -rm,$(wildcard $(_man3constpages)))
+_man3headpages_rm := $(addsuffix -rm,$(wildcard $(_man3headpages)))
+_man3typepages_rm := $(addsuffix -rm,$(wildcard $(_man3typepages)))
+_man4pages_rm     := $(addsuffix -rm,$(wildcard $(_man4pages)))
+_man5pages_rm     := $(addsuffix -rm,$(wildcard $(_man5pages)))
+_man6pages_rm     := $(addsuffix -rm,$(wildcard $(_man6pages)))
+_man7pages_rm     := $(addsuffix -rm,$(wildcard $(_man7pages)))
+_man8pages_rm     := $(addsuffix -rm,$(wildcard $(_man8pages)))
+
+MAN_SECTIONS     := 1 2 2type 3 3const 3head 3type 4 5 6 7 8
+install_manX     := $(foreach x,$(MAN_SECTIONS),install-man$(x))
+uninstall_manX   := $(foreach x,$(MAN_SECTIONS),uninstall-man$(x))
+
+
+$(_man1pages):      $(_man1dir)/%$(Z):      $(MANDIR)/man1/%      | $$(@D)/
+$(_man2pages):      $(_man2dir)/%$(Z):      $(MANDIR)/man2/%      | $$(@D)/
+$(_man2typepages):  $(_man2typedir)/%$(Z):  $(MANDIR)/man2type/%  | $$(@D)/
+$(_man3pages):      $(_man3dir)/%$(Z):      $(MANDIR)/man3/%      | $$(@D)/
+$(_man3constpages): $(_man3constdir)/%$(Z): $(MANDIR)/man3const/% | $$(@D)/
+$(_man3headpages):  $(_man3headdir)/%$(Z):  $(MANDIR)/man3head/%  | $$(@D)/
+$(_man3typepages):  $(_man3typedir)/%$(Z):  $(MANDIR)/man3type/%  | $$(@D)/
+$(_man4pages):      $(_man4dir)/%$(Z):      $(MANDIR)/man4/%      | $$(@D)/
+$(_man5pages):      $(_man5dir)/%$(Z):      $(MANDIR)/man5/%      | $$(@D)/
+$(_man6pages):      $(_man6dir)/%$(Z):      $(MANDIR)/man6/%      | $$(@D)/
+$(_man7pages):      $(_man7dir)/%$(Z):      $(MANDIR)/man7/%      | $$(@D)/
+$(_man8pages):      $(_man8dir)/%$(Z):      $(MANDIR)/man8/%      | $$(@D)/
+
+
+$(_manpages):
+	$(info INSTALL	$@)
+	$(INSTALL_DATA) -T $< $@
+	$(SED) -i \
+		-e '/^\.so /s, man1/\(.*\)\.1$$, $(notdir $(man1dir))/\1$(man1ext),' \
+		-e '/^\.so /s, man2/\(.*\)\.2$$, $(notdir $(man2dir))/\1$(man2ext),' \
+		-e '/^\.so /s, man2type/\(.*\)\.2type$$, $(notdir $(man2typedir))/\1$(man2typeext),' \
+		-e '/^\.so /s, man3/\(.*\)\.3$$, $(notdir $(man3dir))/\1$(man3ext),' \
+		-e '/^\.so /s, man3const/\(.*\)\.3const$$, $(notdir $(man3constdir))/\1$(man3constext),' \
+		-e '/^\.so /s, man3head/\(.*\)\.3head$$, $(notdir $(man3headdir))/\1$(man3headext),' \
+		-e '/^\.so /s, man3type/\(.*\)\.3type$$, $(notdir $(man3typedir))/\1$(man3typeext),' \
+		-e '/^\.so /s, man4/\(.*\)\.4$$, $(notdir $(man4dir))/\1$(man4ext),' \
+		-e '/^\.so /s, man5/\(.*\)\.5$$, $(notdir $(man5dir))/\1$(man5ext),' \
+		-e '/^\.so /s, man6/\(.*\)\.6$$, $(notdir $(man6dir))/\1$(man6ext),' \
+		-e '/^\.so /s, man7/\(.*\)\.7$$, $(notdir $(man7dir))/\1$(man7ext),' \
+		-e '/^\.so /s, man8/\(.*\)\.8$$, $(notdir $(man8dir))/\1$(man8ext),' \
+		$@
+ifeq ($(LINK_PAGES),symlink)
+	if $(GREP) '^\.so ' <$@ >/dev/null; then \
+		$(GREP) '^\.so ' <$@ \
+		| $(SED) 's,^\.so \(.*\),../\1,' \
+		| $(XARGS) -I tgt $(LN) -fsT tgt $@; \
+	fi
+endif
+ifeq ($(Z),.bz2)
+	if ! $(TEST) -L $@; then \
+		$(BZIP2) $(BZIP2FLAGS) <$@ \
+		| $(SPONGE) $@; \
+	fi
+else ifeq ($(Z),.gz)
+	if ! $(TEST) -L $@; then \
+		$(GZIP) $(GZIPFLAGS) - <$@ \
+		| $(SPONGE) $@; \
+	fi
+else ifeq ($(Z),.lz)
+	if ! $(TEST) -L $@; then \
+		$(LZIP) $(LZIPFLAGS) - <$@ \
+		| $(SPONGE) $@; \
+	fi
+else ifeq ($(Z),.xz)
+	if ! $(TEST) -L $@; then \
+		$(XZ) $(XZFLAGS) - <$@ \
+		| $(SPONGE) $@; \
+	fi
+endif
+
+
+.PHONY: install-man1
+install-man1:      $(_man1pages);
+.PHONY: install-man2
+install-man2:      $(_man2pages);
+.PHONY: install-man2type
+install-man2type:  $(_man2typepages);
+.PHONY: install-man3
+install-man3:      $(_man3pages);
+.PHONY: install-man3const
+install-man3const: $(_man3constpages);
+.PHONY: install-man3head
+install-man3head:  $(_man3headpages);
+.PHONY: install-man3type
+install-man3type:  $(_man3typepages);
+.PHONY: install-man4
+install-man4:      $(_man4pages);
+.PHONY: install-man5
+install-man5:      $(_man5pages);
+.PHONY: install-man6
+install-man6:      $(_man6pages);
+.PHONY: install-man7
+install-man7:      $(_man7pages);
+.PHONY: install-man8
+install-man8:      $(_man8pages);
+
+.PHONY: install-man
+install-man: $(install_manX);
+
+.PHONY: $(uninstall_manX)
+$(uninstall_manX): uninstall-man%: $$(_man%pages_rm);
+
+.PHONY: uninstall-man
+uninstall-man: $(uninstall_manX);
+
+
+endif  # include guard
diff --git a/share/mk/lint/_.mk b/share/mk/lint/_.mk
new file mode 100644
index 0000000..9d93bd3
--- /dev/null
+++ b/share/mk/lint/_.mk
@@ -0,0 +1,18 @@
+########################################################################
+# Copyright 2021-2023, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_LINT_INCLUDED
+MAKEFILE_LINT_INCLUDED := 1
+
+
+lint := lint-c lint-man lint-mdoc
+
+
+.PHONY: lint
+lint: $(lint);
+
+
+endif  # include guard
diff --git a/share/mk/lint/c.mk b/share/mk/lint/c.mk
new file mode 100644
index 0000000..b7d80a9
--- /dev/null
+++ b/share/mk/lint/c.mk
@@ -0,0 +1,102 @@
+########################################################################
+# Copyright 2021-2022, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_LINT_C_INCLUDED
+MAKEFILE_LINT_C_INCLUDED := 1
+
+
+include $(MAKEFILEDIR)/build/src.mk
+include $(MAKEFILEDIR)/cmd.mk
+include $(MAKEFILEDIR)/lint/_.mk
+
+
+DEFAULT_CHECKPATCHFLAGS :=
+EXTRA_CHECKPATCHFLAGS   :=
+CHECKPATCHFLAGS         := $(DEFAULT_CHECKPATCHFLAGS) $(EXTRA_CHECKPATCHFLAGS)
+CHECKPATCH              := checkpatch
+
+clang-tidy_config       := $(SYSCONFDIR)/clang-tidy/config.yaml
+DEFAULT_CLANG-TIDYFLAGS := \
+	--config-file=$(clang-tidy_config) \
+	--quiet \
+	--use-color
+EXTRA_CLANG-TIDYFLAGS   :=
+CLANG-TIDYFLAGS         := $(DEFAULT_CLANG-TIDYFLAGS) $(EXTRA_CLANG-TIDYFLAGS)
+CLANG-TIDY              := clang-tidy
+
+CPPCHECK_SUPPRESS     := $(SYSCONFDIR)/cppcheck/cppcheck.suppress
+DEFAULT_CPPCHECKFLAGS := \
+	--enable=all \
+	--error-exitcode=2 \
+	--inconclusive \
+	--quiet \
+	--suppressions-list=$(CPPCHECK_SUPPRESS)
+EXTRA_CPPCHECKFLAGS   :=
+CPPCHECKFLAGS         := $(DEFAULT_CPPCHECKFLAGS) $(EXTRA_CPPCHECKFLAGS)
+CPPCHECK              := cppcheck
+
+DEFAULT_CPPLINTFLAGS :=
+EXTRA_CPPLINTFLAGS   :=
+CPPLINTFLAGS         := $(DEFAULT_CPPLINTFLAGS) $(EXTRA_CPPLINTFLAGS)
+CPPLINT              := cpplint
+
+DEFAULT_IWYUFLAGS := \
+	-Xiwyu --no_fwd_decls \
+	-Xiwyu --error
+EXTRA_IWYUFLAGS   :=
+IWYUFLAGS         := $(DEFAULT_IWYUFLAGS) $(EXTRA_IWYUFLAGS)
+IWYU              := iwyu
+
+
+_LINT_c_checkpatch := $(patsubst %.c,%.lint-c.checkpatch.touch,$(_UNITS_src_c))
+_LINT_c_clang-tidy := $(patsubst %.c,%.lint-c.clang-tidy.touch,$(_UNITS_src_c))
+_LINT_c_cppcheck   := $(patsubst %.c,%.lint-c.cppcheck.touch,$(_UNITS_src_c))
+_LINT_c_cpplint    := $(patsubst %.c,%.lint-c.cpplint.touch,$(_UNITS_src_c))
+_LINT_c_iwyu       := $(patsubst %.c,%.lint-c.iwyu.touch,$(_UNITS_src_c))
+
+
+linters_c := checkpatch clang-tidy cppcheck cpplint iwyu
+lint_c    := $(foreach x,$(linters_c),lint-c-$(x))
+
+
+$(_LINT_c_checkpatch): %.lint-c.checkpatch.touch: %.c
+	$(info LINT (checkpatch)	$@)
+	$(CHECKPATCH) $(CHECKPATCHFLAGS) -f $<
+	touch $@
+
+$(_LINT_c_clang-tidy): %.lint-c.clang-tidy.touch: %.c
+	$(info LINT (clang-tidy)	$@)
+	$(CLANG-TIDY) $(CLANG-TIDYFLAGS) $< -- $(CPPFLAGS) $(CFLAGS) 2>&1 \
+	| $(SED) '/generated\.$$/d'
+	touch $@
+
+$(_LINT_c_cppcheck): %.lint-c.cppcheck.touch: %.c
+	$(info LINT (cppcheck)	$@)
+	$(CPPCHECK) $(CPPCHECKFLAGS) $<
+	touch $@
+
+$(_LINT_c_cpplint): %.lint-c.cpplint.touch: %.c
+	$(info LINT (cpplint)	$@)
+	$(CPPLINT) $(CPPLINTFLAGS) $< >/dev/null
+	touch $@
+
+$(_LINT_c_iwyu): %.lint-c.iwyu.touch: %.c
+	$(info LINT (iwyu)	$@)
+	$(IWYU) $(IWYUFLAGS) $(CPPFLAGS) $(CFLAGS) $< 2>&1 \
+	| $(TAC) \
+	| $(SED) '/correct/{N;d}' \
+	| $(TAC)
+	touch $@
+
+
+.PHONY: $(lint_c)
+$(lint_c): lint-c-%: $$(_LINT_c_%);
+
+.PHONY: lint-c
+lint-c: $(lint_c);
+
+
+endif  # include guard
diff --git a/share/mk/lint/man/_.mk b/share/mk/lint/man/_.mk
new file mode 100644
index 0000000..8bbc01c
--- /dev/null
+++ b/share/mk/lint/man/_.mk
@@ -0,0 +1,16 @@
+########################################################################
+# Copyright 2021-2023, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_LINT_MAN_INCLUDED
+MAKEFILE_LINT_MAN_INCLUDED := 1
+
+
+DEFAULT_MANDOCFLAGS := -Tlint
+EXTRA_MANDOCFLAGS   :=
+MANDOCFLAGS         := $(DEFAULT_MANDOCFLAGS) $(EXTRA_MANDOCFLAGS)
+
+
+endif  # include guard
diff --git a/share/mk/lint/man/man.mk b/share/mk/lint/man/man.mk
new file mode 100644
index 0000000..cb1bf53
--- /dev/null
+++ b/share/mk/lint/man/man.mk
@@ -0,0 +1,69 @@
+########################################################################
+# Copyright 2021-2023, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_LINT_MAN_MAN_INCLUDED
+MAKEFILE_LINT_MAN_MAN_INCLUDED := 1
+
+
+include $(MAKEFILEDIR)/cmd.mk
+include $(MAKEFILEDIR)/build/_.mk
+include $(MAKEFILEDIR)/lint/_.mk
+include $(MAKEFILEDIR)/lint/man/_.mk
+include $(MAKEFILEDIR)/src.mk
+
+
+mandoc_man_ignore_grep := $(DATAROOTDIR)/lint/mandoc/man.ignore.grep
+
+_LINT_man_mandoc :=$(patsubst $(MANDIR)/%,$(_MANDIR)/%.lint-man.mandoc.touch,$(NONSO_MAN))
+_LINT_man_tbl    :=$(patsubst $(MANDIR)/%,$(_MANDIR)/%.lint-man.tbl.touch,$(NONSO_MAN))
+
+
+linters_man := mandoc tbl
+lint_man    := $(foreach x,$(linters_man),lint-man-$(x))
+
+
+$(_LINT_man_mandoc): $(_MANDIR)/%.lint-man.mandoc.touch: $(MANDIR)/% $(mandoc_man_ignore_grep) | $$(@D)/
+	$(info LINT (mandoc)	$@)
+	! ($(MANDOC) -man $(MANDOCFLAGS) $< 2>&1 \
+	   | $(GREP) -v -f '$(mandoc_man_ignore_grep)' \
+	   ||:; \
+	) \
+	| $(GREP) ^ >&2
+	touch $@
+
+$(_LINT_man_tbl): $(_MANDIR)/%.lint-man.tbl.touch: $(MANDIR)/% | $$(@D)/
+	$(info LINT (tbl comment)	$@)
+	if $(GREP) -q '^\.TS$$' $< && ! $(HEAD) -n1 $< | $(GREP) -q '\\" t$$'; \
+	then \
+		>&2 $(ECHO) "$<:1: missing '\\\" t' comment:"; \
+		>&2 $(HEAD) -n1 <$<; \
+		exit 1; \
+	fi
+	if $(HEAD) -n1 $< | $(GREP) -q '\\" t$$' && ! $(GREP) -q '^\.TS$$' $<; \
+	then \
+		>&2 $(ECHO) "$<:1: spurious '\\\" t' comment:"; \
+		>&2 $(HEAD) -n1 <$<; \
+		exit 1; \
+	fi
+	if $(TAIL) -n+2 <$< | $(GREP) -q '\\" t$$'; \
+	then \
+		>&2 $(ECHO) "$<: spurious '\\\" t' not in first line:"; \
+		>&2 $(GREP) -n '\\" t$$' $< /dev/null; \
+		exit 1; \
+	fi
+	touch $@
+
+
+.PHONY: lint-man-mandoc
+lint-man-mandoc: $(_LINT_man_mandoc);
+.PHONY: lint-man-tbl
+lint-man-tbl:    $(_LINT_man_tbl);
+
+.PHONY: lint-man
+lint-man: $(lint_man);
+
+
+endif  # include guard
diff --git a/share/mk/lint/man/mdoc.mk b/share/mk/lint/man/mdoc.mk
new file mode 100644
index 0000000..9b5f5b4
--- /dev/null
+++ b/share/mk/lint/man/mdoc.mk
@@ -0,0 +1,44 @@
+########################################################################
+# Copyright 2023, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_LINT_MAN_MDOC_INCLUDED
+MAKEFILE_LINT_MAN_MDOC_INCLUDED := 1
+
+
+include $(MAKEFILEDIR)/cmd.mk
+include $(MAKEFILEDIR)/build/_.mk
+include $(MAKEFILEDIR)/lint/_.mk
+include $(MAKEFILEDIR)/lint/man/_.mk
+include $(MAKEFILEDIR)/src.mk
+
+
+mandoc_mdoc_ignore_grep := $(DATAROOTDIR)/lint/mandoc/mdoc.ignore.grep
+
+_LINT_mdoc_mandoc:=$(patsubst $(MANDIR)/%,$(_MANDIR)/%.lint-mdoc.mandoc.touch,$(NONSO_MDOC))
+
+
+linters_mdoc := mandoc
+lint_mdoc    := $(foreach x,$(linters_mdoc),lint-mdoc-$(x))
+
+
+$(_LINT_mdoc_mandoc): $(_MANDIR)/%.lint-mdoc.mandoc.touch: $(MANDIR)/% $(mandoc_mdoc_ignore_grep) | $$(@D)/
+	$(info LINT (mandoc)	$@)
+	! ($(MANDOC) -mdoc $(MANDOCFLAGS) $< 2>&1 \
+	   | $(GREP) -v -f '$(mandoc_mdoc_ignore_grep)' \
+	   ||:; \
+	) \
+	| $(GREP) ^ >&2
+	touch $@
+
+
+.PHONY: $(lint_mdoc)
+$(lint_mdoc): lint-mdoc-%: $$(_LINT_mdoc_%);
+
+.PHONY: lint-mdoc
+lint-mdoc: $(lint_mdoc);
+
+
+endif  # include guard
diff --git a/share/mk/src.mk b/share/mk/src.mk
new file mode 100644
index 0000000..65825b5
--- /dev/null
+++ b/share/mk/src.mk
@@ -0,0 +1,37 @@
+########################################################################
+# Copyright 2021-2022, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_SRC_INCLUDED
+MAKEFILE_SRC_INCLUDED := 1
+
+
+include $(MAKEFILEDIR)/cmd.mk
+
+
+MANDIR := $(srcdir)
+MANEXT := \.[0-9]\w*\(\.man\)\?\(\.in\)\?$
+
+
+MANPAGES := $(shell $(FIND) $(MANDIR)/* -type f \
+		| $(GREP) '$(MANEXT)' \
+		| $(SORT) \
+		| $(SED) 's,:,\\:,g')
+
+MAN1PAGES      := $(filter $(MANDIR)/man1/%,$(filter %.1,$(MANPAGES)))
+MAN2PAGES      := $(filter $(MANDIR)/man2/%,$(filter %.2,$(MANPAGES)))
+MAN2TYPEPAGES  := $(filter $(MANDIR)/man2type/%,$(filter %.2type,$(MANPAGES)))
+MAN3PAGES      := $(filter $(MANDIR)/man3/%,$(filter %.3,$(MANPAGES)))
+MAN3CONSTPAGES := $(filter $(MANDIR)/man3const/%,$(filter %.3const,$(MANPAGES)))
+MAN3HEADPAGES  := $(filter $(MANDIR)/man3head/%,$(filter %.3head,$(MANPAGES)))
+MAN3TYPEPAGES  := $(filter $(MANDIR)/man3type/%,$(filter %.3type,$(MANPAGES)))
+MAN4PAGES      := $(filter $(MANDIR)/man4/%,$(filter %.4,$(MANPAGES)))
+MAN5PAGES      := $(filter $(MANDIR)/man5/%,$(filter %.5,$(MANPAGES)))
+MAN6PAGES      := $(filter $(MANDIR)/man6/%,$(filter %.6,$(MANPAGES)))
+MAN7PAGES      := $(filter $(MANDIR)/man7/%,$(filter %.7,$(MANPAGES)))
+MAN8PAGES      := $(filter $(MANDIR)/man8/%,$(filter %.8,$(MANPAGES)))
+
+
+endif  # include guard
diff --git a/share/mk/verbose.mk b/share/mk/verbose.mk
new file mode 100644
index 0000000..2cc4450
--- /dev/null
+++ b/share/mk/verbose.mk
@@ -0,0 +1,19 @@
+########################################################################
+# Copyright 2022, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_VERBOSE_INCLUDED
+MAKEFILE_VERBOSE_INCLUDED := 1
+
+
+ifdef V
+HIDE_ERR :=
+else
+HIDE_ERR := 2>/dev/null
+.SILENT:
+endif
+
+
+endif  # include guard
diff --git a/share/mk/version.mk b/share/mk/version.mk
new file mode 100644
index 0000000..af3c0cb
--- /dev/null
+++ b/share/mk/version.mk
@@ -0,0 +1,20 @@
+########################################################################
+# Copyright 2022, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_VERSION_INCLUDED
+MAKEFILE_VERSION_INCLUDED := 1
+
+
+include $(MAKEFILEDIR)/cmd.mk
+include $(MAKEFILEDIR)/verbose.mk
+
+
+DISTNAME    := $(shell $(GIT) describe $(HIDE_ERR))
+DISTVERSION := $(patsubst man-pages-%,%,$(DISTNAME))
+DISTDATE    := $(shell $(GIT) log -1 --format='%aD')
+
+
+endif  # include guard