From afdd2e0ca23ccd6a19a604d90b9d75c971a3fe7c Mon Sep 17 00:00:00 2001
From: Zhi Qi <30543181+LittleFall@users.noreply.github.com>
Date: Mon, 18 Apr 2022 22:08:03 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20fix=20build=20issue=20`=E2=80=98maybe=5F?=
 =?UTF-8?q?unused=E2=80=99=20attribute=20ignored`=20on=20centos=20server?=
 =?UTF-8?q?=20=20(#4700)?=
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close pingcap/tiflash#4701
---
 dbms/src/Common/CPUAffinityManager.h    | 7 +++++--
 libs/libcommon/include/common/defines.h | 6 ++++++
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/dbms/src/Common/CPUAffinityManager.h b/dbms/src/Common/CPUAffinityManager.h
index 8c88c3ab1fd..5de62cf8368 100644
--- a/dbms/src/Common/CPUAffinityManager.h
+++ b/dbms/src/Common/CPUAffinityManager.h
@@ -14,6 +14,8 @@
 
 #pragma once
 
+#include <common/defines.h>
+
 #include <string>
 #include <thread>
 #include <unordered_map>
@@ -115,8 +117,9 @@ class CPUAffinityManager
 #endif
 
     // unused except Linux
-    [[maybe_unused]] int query_cpu_percent;
-    [[maybe_unused]] int cpu_cores;
+    MAYBE_UNUSED_MEMBER int query_cpu_percent;
+    MAYBE_UNUSED_MEMBER int cpu_cores;
+
     std::vector<std::string> query_threads;
     Poco::Logger * log;
 
diff --git a/libs/libcommon/include/common/defines.h b/libs/libcommon/include/common/defines.h
index 51b99a2d0ba..ff79a4d2077 100644
--- a/libs/libcommon/include/common/defines.h
+++ b/libs/libcommon/include/common/defines.h
@@ -199,3 +199,9 @@ static ALWAYS_INLINE inline void TIFLASH_NO_OPTIMIZE(T && var)
 #define TIFLASH_DUMMY_FUNCTION_DEFINITION
 #define tiflash_compiler_builtin_memcpy __builtin_memcpy
 #endif
+
+#ifdef __clang__
+#define MAYBE_UNUSED_MEMBER [[maybe_unused]]
+#else
+#define MAYBE_UNUSED_MEMBER
+#endif