[PATCH 3/6] Makefile, lint-man.mk: lint-man-groff-eqn: Split target from lint-man-groff

[Alejandro Colomar]

Allow running eqn(1) separately, which allows more granular testing, and
also inspecting the output of eqn(1), which can be useful for debugging
the pages.

Signed-off-by: Alejandro Colomar <alx@kernel.org>
---
 Makefile        |  1 +
 lib/lint-man.mk | 14 +++++++++++---
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index 46e71faab..b5171e377 100644
--- a/Makefile
+++ b/Makefile
@@ -74,6 +74,7 @@ help:
        $(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  lint-man-groff-eqn      Lint man pages with eqn(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 8207860d8..928bb8c68 100644
--- a/lib/lint-man.mk
+++ b/lib/lint-man.mk
@@ -65,6 +65,7 @@ MANDOC              := mandoc
 
 
 _LINT_man_groff_eqn   :=$(patsubst $(MANDIR)/%,$(_LINTDIR)/%.eqn,$(LINTMAN))
+_LINT_man_groff_troff :=$(patsubst $(MANDIR)/%,$(_LINTDIR)/%.troff,$(LINTMAN))
 
 _LINT_man_groff :=$(patsubst 
$(MANDIR)/%,$(_LINTDIR)/%.lint-man.groff.touch,$(LINTMAN))
 _LINT_man_mandoc:=$(patsubst 
$(MANDIR)/%,$(_LINTDIR)/%.lint-man.mandoc.touch,$(LINTMAN))
@@ -79,10 +80,13 @@ $(_LINT_man_groff_eqn): $(_LINTDIR)/%.eqn: $(MANDIR)/% | 
$$(@D)/.
        $(info LINT (tbl)       $@)
        $(TBL) $< >$@
 
-$(_LINT_man_groff): %.lint-man.groff.touch: %.eqn | $$(@D)/.
+$(_LINT_man_groff_troff): %.troff: %.eqn | $$(@D)/.
+       $(info LINT (eqn)       $@)
+       $(EQN) $(EQNFLAGS) <$< >$@
+
+$(_LINT_man_groff): %.lint-man.groff.touch: %.troff | $$(@D)/.
        $(info LINT (groff)     $@)
-       $(EQN) $(EQNFLAGS) <$< \
-       | $(TROFF) $(TROFFFLAGS) \
+       $(TROFF) $(TROFFFLAGS) <$< \
        | $(GROTTY) $(GROTTYFLAGS) \
        | $(COL) $(COLFLAGS) \
        | (! $(GREP) -n '.\{$(MANWIDTH)\}.' | $(SED) 's,^,$<:,' >&2)
@@ -129,6 +133,10 @@ $(_LINT_man_tbl): $(_LINTDIR)/%.lint-man.tbl.touch: 
$(MANDIR)/% | $$(@D)/.
 lint-man-groff-tbl: $(_LINT_man_groff_eqn)
        @:
 
+.PHONY: lint-man-groff-eqn
+lint-man-groff-eqn: $(_LINT_man_groff_troff)
+       @:
+
 .PHONY: $(lint_man)
 $(lint_man): lint-man-%: $$(_LINT_man_%)
        @:
-- 
2.39.2