https://git.ruby-lang.org/ruby.git/commit/?id=9188c5dd6d

From 9188c5dd6d8d8c411ea698fff747643845e92f64 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Tue, 13 Sep 2022 23:56:34 +0900
Subject: -undefined dynamic_lookup is obsolete

---
 configure.ac | 1 -
 1 file changed, 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 92496bb2b7..2dde902653 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2774,7 +2774,6 @@ AS_IF([test "$with_dln_a_out" != yes], [ https://github.com/ruby/ruby/blob/trunk/configure.ac#L2774
     AS_CASE(["$target_os"],
       [darwin*], [
 	for flag in \
-	  "-undefined dynamic_lookup" \
 	  "-multiply_defined suppress" \
 	  ; do
 	  test "x${linker_flag}" = x || flag="${linker_flag}`echo ${flag} | tr ' ' ,`"
-- 
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