lint-man.mk: Use grep through its command variable

Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>

diff --git a/lib/lint-man.mk b/lib/lint-man.mk
index 93c1ef8a0ebc1d93340e53c7f9e616e1f62e43df..72b2b3ed92b19a4df80d4c144b16d37b53f5e30d 100644 (file)
--- a/lib/lint-man.mk
+++ b/lib/lint-man.mk
@@ -73,7 +73,7 @@ $(_LINT_man_groff): $(_LINTDIR)/%.lint-man.groff.touch: $(MANDIR)/% | $$(@D)/.
        | $(TROFF) $(TROFFFLAGS) \
        | $(GROTTY) $(GROTTYFLAGS) \
        | $(COL) $(COLFLAGS) \
-       | (! grep -n '.\{80\}.')
+       | (! $(GREP) -n '.\{80\}.')
        touch $@
 
 $(_LINT_man_mandoc): $(_LINTDIR)/%.lint-man.mandoc.touch: $(MANDIR)/% | $$(@D)/.