https://git.ruby-lang.org/ruby.git/commit/?id=c8121b2e3d

From c8121b2e3d85c5dc4219918604c4d301204e6455 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Fri, 22 Jan 2021 18:29:26 +0900
Subject: Adjust CPU name as arm64-darwin

config.sub replaces arm64 with aarch64.

diff --git a/configure.ac b/configure.ac
index 5aaecba..90d08fc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -80,6 +80,14 @@ dnl checks for alternative programs https://github.com/ruby/ruby/blob/trunk/configure.ac#L80
 AC_CANONICAL_BUILD
 AC_CANONICAL_HOST
 AC_CANONICAL_TARGET
+AS_CASE(["$target_cpu-$target_os"],
+    [aarch64-darwin*], [
+        target_cpu=arm64
+        AS_CASE(["$target_vendor"], [unknown], [target_vendor=apple])
+        target="$target_cpu-$target_vendor-$target_os"
+        target_alias="$target_cpu-$target_os"
+    ])
+
 AC_ARG_PROGRAM
 RUBY_RM_RECURSIVE
 AC_ARG_WITH(gcc,
-- 
cgit v0.10.2


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