From 0b9a3371ea6287b5962906216815fe5e8aa8bec0 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Sun, 22 Aug 2021 17:49:12 +0900
Subject: [PATCH] [ruby/date] Add zontab.list dependency

https://github.com/ruby/date/commit/7e1ffbf568
---
 ext/date/prereq.mk | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/ext/date/prereq.mk b/ext/date/prereq.mk
index eb71e55e71..cee7685975 100644
--- a/ext/date/prereq.mk
+++ b/ext/date/prereq.mk
@@ -10,3 +10,10 @@ zonetab.h: zonetab.list
 .PHONY: update-zonetab
 update-zonetab:
 	$(RUBY) -C $(srcdir) update-abbr
+
+.PHONY: update-nothing
+update-nothing:
+
+update = nothing
+
+zonetab.list: update-$(update)