[PATCH 2/6] Makefile, lint-man.mk: lint-man-groff-tbl: Split target from lint-man-groff

[Alejandro Colomar]

Allow running tbl(1) separately, which has several benefits:

-  More granular testing.
-  Allows inspecting the output of tbl(1), which can be useful for
   debugging the pages.

Signed-off-by: Alejandro Colomar <alx@kernel.org>
---
 Makefile        |  3 ++-
 lib/lint-man.mk | 15 ++++++++++++---
 2 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/Makefile b/Makefile
index 54b492d40..46e71faab 100644
--- a/Makefile
+++ b/Makefile
@@ -70,9 +70,10 @@ help:
        $(info  lint-c-cpplint          Lint C programs from EXAMPLES with 
cpplint(1))
        $(info  lint-c-iwyu             Lint C programs from EXAMPLES with 
iwyu(1))
        $(info  lint-man                Wrapper for lint-man-* targets)
-       $(info  lint-man-groff          Lint man pages with groff(1))
        $(info  lint-man-mandoc         Lint man pages with mandoc(1))
        $(info  lint-man-tbl            Lint man pages about '\" t' comment for 
tbl(1))
+       $(info  lint-man-groff          Lint man pages with groff(1))
+       $(info  lint-man-groff-tbl      Lint man pages with tbl(1))
        $(info  )
        $(info  [un]install             Alias for "[un]install-man")
        $(info  [un]install-man         Wrapper for [un]install-man* targets)
diff --git a/lib/lint-man.mk b/lib/lint-man.mk
index c4a4c57b0..8207860d8 100644
--- a/lib/lint-man.mk
+++ b/lib/lint-man.mk
@@ -64,6 +64,8 @@ MANDOCFLAGS         := $(DEFAULT_MANDOCFLAGS) 
$(EXTRA_MANDOCFLAGS)
 MANDOC              := mandoc
 
 
+_LINT_man_groff_eqn   :=$(patsubst $(MANDIR)/%,$(_LINTDIR)/%.eqn,$(LINTMAN))
+
 _LINT_man_groff :=$(patsubst 
$(MANDIR)/%,$(_LINTDIR)/%.lint-man.groff.touch,$(LINTMAN))
 _LINT_man_mandoc:=$(patsubst 
$(MANDIR)/%,$(_LINTDIR)/%.lint-man.mandoc.touch,$(LINTMAN))
 _LINT_man_tbl   :=$(patsubst 
$(MANDIR)/%,$(_LINTDIR)/%.lint-man.tbl.touch,$(LINTMAN))
@@ -73,10 +75,13 @@ linters_man := groff mandoc tbl
 lint_man    := $(foreach x,$(linters_man),lint-man-$(x))
 
 
-$(_LINT_man_groff): $(_LINTDIR)/%.lint-man.groff.touch: $(MANDIR)/% | $$(@D)/.
+$(_LINT_man_groff_eqn): $(_LINTDIR)/%.eqn: $(MANDIR)/% | $$(@D)/.
+       $(info LINT (tbl)       $@)
+       $(TBL) $< >$@
+
+$(_LINT_man_groff): %.lint-man.groff.touch: %.eqn | $$(@D)/.
        $(info LINT (groff)     $@)
-       $(TBL) $< \
-       | $(EQN) $(EQNFLAGS) \
+       $(EQN) $(EQNFLAGS) <$< \
        | $(TROFF) $(TROFFFLAGS) \
        | $(GROTTY) $(GROTTYFLAGS) \
        | $(COL) $(COLFLAGS) \
@@ -120,6 +125,10 @@ $(_LINT_man_tbl): $(_LINTDIR)/%.lint-man.tbl.touch: 
$(MANDIR)/% | $$(@D)/.
        touch $@
 
 
+.PHONY: lint-man-groff-tbl
+lint-man-groff-tbl: $(_LINT_man_groff_eqn)
+       @:
+
 .PHONY: $(lint_man)
 $(lint_man): lint-man-%: $$(_LINT_man_%)
        @:
-- 
2.39.2