From d505d77b7e5657c3ef228fbee0d39b0a5dc5b9cd Mon Sep 17 00:00:00 2001
From: Casey Bodley <cbodley@redhat.com>
Date: Fri, 20 Apr 2018 11:47:37 -0400
Subject: [PATCH] random: revert change from boost::optional to std::optional

somehow this was breaking the seeding of thread-local engines on gcc.
we'll have to investigate this further, but for now i'm reverting this
piece to get messengers working again

Fixes: http://tracker.ceph.com/issues/23778

Signed-off-by: Casey Bodley <cbodley@redhat.com>
---
 src/include/random.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/include/random.h b/src/include/random.h
index 63593e8e601a7..cbfee2d7235b1 100644
--- a/src/include/random.h
+++ b/src/include/random.h
@@ -17,8 +17,8 @@
 
 #include <mutex>
 #include <random>
-#include <optional>
 #include <type_traits>
+#include <boost/optional.hpp>
 
 // Basic random number facility, adapted from N3551:
 namespace ceph::util {
@@ -114,7 +114,7 @@ void randomize_rng()
 template <typename EngineT>
 EngineT& engine()
 {
-  thread_local std::optional<EngineT> rng_engine;
+  thread_local boost::optional<EngineT> rng_engine;
 
   if (!rng_engine) {
     rng_engine.emplace(EngineT());
-- 
2.39.5