From 214024627a4503ca8a40434f6293d71b8267ecda Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Fri, 28 Aug 2026 19:31:33 +0900
Subject: [PATCH] Suppress warnings by clang 21

https://bugs.ruby-lang.org/issues/21629
---
 ext/date/extconf.rb | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/ext/date/extconf.rb b/ext/date/extconf.rb
index 8a1467df..3ab534f8 100644
--- a/ext/date/extconf.rb
+++ b/ext/date/extconf.rb
@@ -3,6 +3,9 @@
 
 config_string("strict_warnflags") {|w| $warnflags += " #{w}"}
 
+unless try_compile("", "", werror: true)
+  append_cflags("-Wno-default-const-init-field-unsafe")
+end
 append_cflags("-Wno-compound-token-split-by-macro") if RUBY_VERSION < "2.7."
 have_func("rb_category_warn")
 with_werror("", {:werror => true}) do |opt, |