From feef8f060e1d16fa3953e60c3b8d0110d9bd7e6d Mon Sep 17 00:00:00 2001
From: Liu Zixian <zixian.liu@dolphindb.com>
Date: Fri, 24 Apr 2026 21:52:41 +0800
Subject: [PATCH] fix build for old compilers (#1323)

Signed-off-by: Liu Zixian <zixian.liu@dolphindb.com>
---
 include/xsimd/arch/common/xsimd_common_bit.hpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/xsimd/arch/common/xsimd_common_bit.hpp b/include/xsimd/arch/common/xsimd_common_bit.hpp
index c3ef7d4d9..224d8c233 100644
--- a/include/xsimd/arch/common/xsimd_common_bit.hpp
+++ b/include/xsimd/arch/common/xsimd_common_bit.hpp
@@ -5,6 +5,8 @@
 #ifndef XSIMD_BIT_HPP
 #define XSIMD_BIT_HPP
 
+#if __cplusplus > 202002L
+
 #include <version>
 
 #if __cpp_lib_bitops >= 201907L
@@ -23,6 +25,8 @@ namespace xsimd
     }
 }
 
+#endif
+
 #else
 
 #include <climits>