commit dcfbe3e4b7ad1ded9b17fa04743e9f97b8aad9fa
Author: Sam James <sam@gentoo.org>
Date:   Sun Apr 9 04:04:06 2023 +0100

    sql/memory: Fix build on musl

    _SC_LEVEL1_DCACHE_LINESIZE is not always available on Linux, e.g. with musl libc.

    It's provided by glibc instead and is a glibc-internal.

diff --git a/sql/memory/aligned_atomic.h b/sql/memory/aligned_atomic.h
index d13d45b9dee..bd19c0cf4d6 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;