From 5a0dbb19c6d0d1913233f7d3ecce96e8f0168584 Mon Sep 17 00:00:00 2001
From: Lasse Collin <lasse.collin@tukaani.org>
Date: Wed, 28 Oct 2026 10:11:50 +0200
Subject: [PATCH] xz: Silence a warning from Clang 23 when threading is
 disabled

src/xz/hardware.c:29:13: warning: variable 'use_mt_mode_with_one_thread' set but not used [-Wunused-but-set-global]
   29 | static bool use_mt_mode_with_one_thread = false;
      |             ^
---
 src/xz/hardware.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/xz/hardware.c b/src/xz/hardware.c
index 3a1a709f..9a6a1aa0 100644
--- a/src/xz/hardware.c
+++ b/src/xz/hardware.c
@@ -15,6 +15,10 @@
 #	include <sys/resource.h>
 #endif
 
+#if !defined(MYTHREAD_ENABLED) && defined(__clang__) && __clang_major__ >= 23
+#	pragma GCC diagnostic ignored "-Wunused-but-set-global"
+#endif
+
 
 /// Maximum number of worker threads. This can be set with
 /// the --threads=NUM command line option.