*.mk: build-pre*: Split device-independent preprocessing from the catman targets

To build other output formats from the same sources, let's split the
generic part of the pipelines.

Signed-off-by: Alejandro Colomar <alx@kernel.org>

3 files changed, 55 insertions, 27 deletions

diff --git a/Makefile b/Makefile
index 4dda2001e..a75469871 100644
--- a/Makefile
+++ b/Makefile
@@ -50,9 +50,11 @@ help:
 	$(info	)
 	$(info	build			Wrapper for "build-catman build-html build-src")
 	$(info	)
+	$(info	build-pre		Preprocess man pages; alias for "build-pre-tbl")
+	$(info	build-pre-preconv	Preprocess man pages with preconv(1))
+	$(info	build-pre-tbl		Preprocess man pages with tbl(1))
+	$(info	)
 	$(info	build-catman		Build cat pages; alias for "build-catman-grotty")
-	$(info	build-catman-preconv	preconv(1) step of "build-catman")
-	$(info	build-catman-tbl	tbl(1) step of "build-catman")
 	$(info	build-catman-eqn	eqn(1) step of "build-catman")
 	$(info	build-catman-troff	Wrapper for build-catman-troff-* targets)
 	$(info	build-catman-troff-man	troff(1) step of "build-catman" for man(7) pages)
@@ -122,6 +124,7 @@ include $(MAKEFILEDIR)/check/catman.mk
 include $(MAKEFILEDIR)/build/_.mk
 include $(MAKEFILEDIR)/build/catman.mk
 include $(MAKEFILEDIR)/build/html.mk
+include $(MAKEFILEDIR)/build/pre.mk
 include $(MAKEFILEDIR)/build/src.mk
 include $(MAKEFILEDIR)/dist.mk
 include $(MAKEFILEDIR)/install/_.mk
diff --git a/share/mk/build/catman.mk b/share/mk/build/catman.mk
index 47f7666d5..b3a15f0e9 100644
--- a/share/mk/build/catman.mk
+++ b/share/mk/build/catman.mk
@@ -23,13 +23,6 @@ NROFF_OUT_DEVICE  := $(shell $(LOCALE) charmap \
                                  && $(ECHO) utf8 \
                                  || $(ECHO) ascii)
 
-DEFAULT_PRECONVFLAGS :=
-EXTRA_PRECONVFLAGS   :=
-PRECONVFLAGS         := $(DEFAULT_PRECONVFLAGS) $(EXTRA_PRECONVFLAGS)
-PRECONV              := preconv
-
-TBL := tbl
-
 DEFAULT_EQNFLAGS :=
 EXTRA_EQNFLAGS   :=
 EQNFLAGS         := $(DEFAULT_EQNFLAGS) $(EXTRA_EQNFLAGS)
@@ -60,22 +53,12 @@ GROTTYFLAGS         := $(DEFAULT_GROTTYFLAGS) $(EXTRA_GROTTYFLAGS)
 GROTTY              := grotty
 
 
-_MAN_tbl        := $(patsubst $(MANDIR)/%,$(_MANDIR)/%.tbl,$(NONSO_MAN) $(NONSO_MDOC))
-_MAN_eqn        := $(patsubst $(MANDIR)/%,$(_MANDIR)/%.eqn,$(NONSO_MAN) $(NONSO_MDOC))
 _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))
 
 
-$(_MAN_tbl): $(_MANDIR)/%.tbl: $(MANDIR)/% | $$(@D)/
-	$(info	PRECONV	$@)
-	$(PRECONV) $(PRECONVFLAGS) $< >$@
-
-$(_MAN_eqn): %.eqn: %.tbl | $$(@D)/
-	$(info	TBL	$@)
-	$(TBL) <$< >$@
-
 $(_CATMAN_troff): %.cat.troff: %.eqn | $$(@D)/
 	$(info	EQN	$@)
 	$(EQN) -T$(NROFF_OUT_DEVICE) $(EQNFLAGS) <$< 2>&1 >$@ \
@@ -96,14 +79,6 @@ $(_CATMAN): %.cat: %.cat.set | $$(@D)/
 	$(GROTTY) $(GROTTYFLAGS) <$< >$@
 
 
-.PHONY: build-catman-preconv
-build-catman-preconv: $(_MAN_tbl)
-	@:
-
-.PHONY: build-catman-tbl
-build-catman-tbl: $(_MAN_eqn)
-	@:
-
 .PHONY: build-catman-eqn
 build-catman-eqn: $(_CATMAN_troff)
 	@:
diff --git a/share/mk/build/pre.mk b/share/mk/build/pre.mk
new file mode 100644
index 000000000..cfa01f663
--- /dev/null
+++ b/share/mk/build/pre.mk
@@ -0,0 +1,50 @@
+########################################################################
+# 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