From 5d8bebb7614157768d49372618ebbe3049375820 Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@gmail.com>
Date: Tue, 3 Feb 2026 14:37:20 +0200
Subject: [PATCH] Avoid GCC 4.x warning for calling memset with a constant size
 of zero

---
 include/boost/circular_buffer/debug.hpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/boost/circular_buffer/debug.hpp b/include/boost/circular_buffer/debug.hpp
index b6ab0fe..6559a67 100644
--- a/include/boost/circular_buffer/debug.hpp
+++ b/include/boost/circular_buffer/debug.hpp
@@ -34,6 +34,10 @@ const int UNINITIALIZED = 0xcc;
 
 template <class T>
 inline void do_fill_uninitialized_memory(T* data, std::size_t size_in_bytes) BOOST_NOEXCEPT {
+#if defined(__GNUC__) && __GNUC__ < 5
+    // Avoid warning for calling memset with a constant size of zero
+    if( size_in_bytes )
+#endif
     std::memset(static_cast<void*>(data), UNINITIALIZED, size_in_bytes);
 }