1 files changed, 6 insertions, 0 deletions
diff --git a/common.mk b/common.mk
index 839eba3c13..3ee4ae05f2 100644
--- a/common.mk
+++ b/common.mk
@@ -1023,6 +1023,12 @@ yes-test-all: sudo-precheck
 sudo-precheck: PHONY
 	@$(SUDO) echo > $(NULL)
 
+update-man-date: PHONY
+	-$(Q) $(BASERUBY) -I"$(srcdir)/tool" -rvcs -i -p \
+	-e 'BEGIN{@vcs=VCS.detect(ARGV.shift)}' \
+	-e '$$_.sub!(/^(\.Dd ).*/){$$1+@vcs.modified(ARGF.path).strftime("%B %d, %Y")}' \
+	"$(srcdir)" "$(srcdir)"/man/*.1
+
 help: PHONY
 	$(MESSAGE_BEGIN) \
 	"                Makefile of Ruby" \