From c3244a3574da8ddc35523ef1b882dd2aadfc2818 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Fri, 22 Jan 2021 22:29:17 +0900
Subject: Do not set target_alias if unset

---
 configure.ac | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/configure.ac b/configure.ac
index 90d08fcf12..65afe5a99b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -83,9 +83,9 @@ 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"
+        AS_CASE(["$target_vendor"], [unknown], [target_vendor=apple target=${target/-unknown-/-apple-}])
+        target="${target/aarch64/arm64}"
+        target_alias="${target_alias/aarch64/arm64}"
     ])
 
 AC_ARG_PROGRAM
-- 
cgit v1.2.3