https://github.com/ceph/ceph/pull/73439

From 131a9f4ea647f1377733e7f30e9e854d5fadfcd0 Mon Sep 17 00:00:00 2001
From: "Z. Liu" <zhixu.liu@gmail.com>
Date: Sun, 1 Nov 2026 18:14:05 +0800
Subject: [PATCH] librados: drop unused Boost.Asio symbols

librados.map, the linker version script for librados.so, explicitly
lists several Boost.Asio internal symbols to keep them visible while
localizing other symbols.

Two of these symbols belong to
call_stack<strand_service::strand_impl, unsigned char>::top_:
the static member itself and its guard variable. They are used by the
deprecated io_context::strand implementation.

When ceph is built with BOOST_ASIO_NO_TS_EXECUTORS, the legacy
io_context::strand implementation is disabled. Consequently, these two
symbols are no longer emitted, but remain listed in the version script.
This causes lld to fail during linking:

> ld.lld: error: version script assignment of 'LIBRADOS_PRIVATE' to
> symbol 'boost::asio::detail::call_stack<boost::asio::detail::strand_service::strand_impl, unsigned char>::top_' failed: symbol not defined

Signed-off-by: Z. Liu <zhixu.liu@gmail.com>

diff --git a/src/librados/librados.map b/src/librados/librados.map
index 96dd5072d94..9441ebe414f 100644
--- a/src/librados/librados.map
+++ b/src/librados/librados.map
@@ -4,10 +4,8 @@ LIBRADOS_PRIVATE {
 		_rados_*;
 		extern "C++" {
 			"guard variable for boost::asio::detail::call_stack<boost::asio::detail::strand_executor_service::strand_impl, unsigned char>::top_";
-			"guard variable for boost::asio::detail::call_stack<boost::asio::detail::strand_service::strand_impl, unsigned char>::top_";
 			"guard variable for boost::asio::detail::call_stack<boost::asio::detail::thread_context, boost::asio::detail::thread_info_base>::top_";
 			"boost::asio::detail::call_stack<boost::asio::detail::strand_executor_service::strand_impl, unsigned char>::top_";
-			"boost::asio::detail::call_stack<boost::asio::detail::strand_service::strand_impl, unsigned char>::top_";
 			"boost::asio::detail::call_stack<boost::asio::detail::thread_context, boost::asio::detail::thread_info_base>::top_";
 
 		};
-- 
2.49.1