https://github.com/mysql/mysql-server/pull/454

From c875f049cb3571da1b9b5bcae50caccc5ee47cfb Mon Sep 17 00:00:00 2001
From: orbea <orbea@riseup.net>
Date: Fri, 7 Apr 2023 12:47:51 -0700
Subject: [PATCH] sql/memory: Fix the musl build

_SC_LEVEL1_DCACHE_LINESIZE is not specific to linux, but to glibc.
---
 sql/memory/aligned_atomic.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sql/memory/aligned_atomic.h b/sql/memory/aligned_atomic.h
index d13d45b9deea..bd19c0cf4d6f 100644
--- a/sql/memory/aligned_atomic.h
+++ b/sql/memory/aligned_atomic.h
@@ -76,7 +76,7 @@ static inline size_t _cache_line_size() {
   return line_size;
 }
 
-#elif defined(__linux__)
+#elif defined(__GLIBC__)
 static inline size_t _cache_line_size() {
   long size = sysconf(_SC_LEVEL1_DCACHE_LINESIZE);
   if (size == -1) return 64;