From 19716b3acdc78f6b8bd62da3f30d74f012ae894b Mon Sep 17 00:00:00 2001
From: Xuehan Xu <xxhdx1985126@gmail.com>
Date: Tue, 27 Feb 2024 17:06:07 +0800
Subject: [PATCH] crimson/os/alienstore: use homebrew counting_semaphore

std::counting_semaphore has the bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104928,
go back to our homebrew version

Signed-off-by: Xuehan Xu <xxhdx1985126@gmail.com>
(cherry picked from commit c884db34e049716577f7868b76685df182f82678)
---
 src/crimson/os/alienstore/thread_pool.h | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/src/crimson/os/alienstore/thread_pool.h b/src/crimson/os/alienstore/thread_pool.h
index 78e18219a88a..7a21eb34b8a9 100644
--- a/src/crimson/os/alienstore/thread_pool.h
+++ b/src/crimson/os/alienstore/thread_pool.h
@@ -15,14 +15,10 @@
 #include <seastar/core/semaphore.hh>
 #include <seastar/core/sharded.hh>
 
-#if __cplusplus > 201703L
-#include <semaphore>
-namespace crimson {
-  using std::counting_semaphore;
-}
-#else
+// std::counting_semaphore is buggy in libstdc++-11
+// (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104928),
+// so we switch back to the homebrew version for now.
 #include "semaphore.h"
-#endif
 
 namespace crimson::os {
 
-- 
2.47.3