From 851b01cf35f29780763ba5030df184f243e40b4d Mon Sep 17 00:00:00 2001
From: Alejandro Colomar <alx@kernel.org>
Date: Sun, 23 Apr 2023 03:05:29 +0200
Subject: *.mk: build-pdf: Build PDF manual pages

Signed-off-by: Alejandro Colomar <alx@kernel.org>
---
 Makefile              | 13 +++++++--
 share/mk/build/_.mk   |  2 +-
 share/mk/build/pdf.mk | 74 +++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 86 insertions(+), 3 deletions(-)
 create mode 100644 share/mk/build/pdf.mk

diff --git a/Makefile b/Makefile
index a32613962..0705d7080 100644
--- a/Makefile
+++ b/Makefile
@@ -48,7 +48,7 @@ help:
 	$(info	)
 	$(info	clean			Remove $$(builddir))
 	$(info	)
-	$(info	build			Wrapper for "build-catman build-html build-src")
+	$(info	build			Wrapper for build-* targets)
 	$(info	)
 	$(info	build-pre		Preprocess man pages; alias for "build-pre-tbl")
 	$(info	build-pre-preconv	Preprocess man pages with preconv(1))
@@ -64,7 +64,14 @@ help:
 	$(info	build-html		Build HTML manual pages)
 	$(info	html			Alias for "build-html")
 	$(info	)
-	$(info	build-ps		Build ps manual pages; alias for "build-ps-grops")
+	$(info	build-pdf		Build PDF manual pages; alias for "build-pdf-grops")
+	$(info	build-pdf-eqn		eqn(1) step of "build-pdf")
+	$(info	build-pdf-troff		Wrapper for build-pdf-troff-* targets)
+	$(info	build-pdf-troff-man	troff(1) step of "build-pdf" for man(7) pages)
+	$(info	build-pdf-troff-mdoc	troff(1) step of "build-pdf" for mdoc(7) pages)
+	$(info	build-pdf-gropdf	gropdf(1) step of "build-pdf")
+	$(info	)
+	$(info	build-ps		Build PostScript manual pages; alias for "build-ps-grops")
 	$(info	build-ps-eqn		eqn(1) step of "build-ps")
 	$(info	build-ps-troff		Wrapper for build-ps-troff-* targets)
 	$(info	build-ps-troff-man	troff(1) step of "build-ps" for man(7) pages)
@@ -131,6 +138,7 @@ include $(MAKEFILEDIR)/check/catman.mk
 include $(MAKEFILEDIR)/build/_.mk
 include $(MAKEFILEDIR)/build/catman.mk
 include $(MAKEFILEDIR)/build/html.mk
+include $(MAKEFILEDIR)/build/pdf.mk
 include $(MAKEFILEDIR)/build/pre.mk
 include $(MAKEFILEDIR)/build/ps.mk
 include $(MAKEFILEDIR)/build/src.mk
@@ -188,6 +196,7 @@ help-variables:
 	$(info	TBL)
 	$(info	EQN		{EXTRA_,}EQNFLAGS)
 	$(info	TROFF		{EXTRA_,}TROFFFLAGS{,_MAN,_MDOC}	{EXTRA_,}NROFFFLAGS)
+	$(info	GROPDF		{EXTRA_,}GROPDFFLAGS)
 	$(info	GROPS		{EXTRA_,}GROPSFLAGS)
 	$(info	GROTTY		{EXTRA_,}GROTTYFLAGS)
 	$(info	COL		{EXTRA_,}COLFLAGS)
diff --git a/share/mk/build/_.mk b/share/mk/build/_.mk
index c42141ba0..c68290c1e 100644
--- a/share/mk/build/_.mk
+++ b/share/mk/build/_.mk
@@ -39,7 +39,7 @@ $(builddir)/%/:
 
 
 .PHONY: build
-build: build-catman build-html build-ps build-src
+build: build-catman build-html build-pdf build-ps build-src
 	@:
 
 .PHONY: clean
diff --git a/share/mk/build/pdf.mk b/share/mk/build/pdf.mk
new file mode 100644
index 000000000..c2547bf0b
--- /dev/null
+++ b/share/mk/build/pdf.mk
@@ -0,0 +1,74 @@
+########################################################################
+# 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 | $$(@D)/
+	$(info	EQN	$@)
+	$(EQN) -Tpdf $(EQNFLAGS) <$< 2>&1 >$@ \
+	| ( ! $(GREP) ^ )
+
+$(_PDFMAN_MAN_set): %.pdf.set: %.pdf.troff | $$(@D)/
+	$(info	TROFF	$@)
+	$(TROFF) -Tpdf $(TROFFFLAGS_MAN) <$< 2>&1 >$@ \
+	| ( ! $(GREP) ^ )
+
+$(_PDFMAN_MDOC_set): %.pdf.set: %.pdf.troff | $$(@D)/
+	$(info	TROFF	$@)
+	$(TROFF) -Tpdf $(TROFFFLAGS_MDOC) <$< 2>&1 >$@ \
+	| ( ! $(GREP) ^ )
+
+$(_PDFMAN): %.pdf: %.pdf.set | $$(@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
-- 
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