Regressed by https://github.com/boostorg/date_time/commit/f9f2aaf5216c

src/rbd_replay/Replayer.cc:353:65: error: no matching conversion for functional-style cast from 'float' to 'boost::posix_time::microseconds' (aka 'subsecond_duration<boost::posix_time::time_duration, 1000000>')
    boost::system_time sub_release_time(action_completed_time + boost::posix_time::microseconds(dep.time_delta * m_latency_multiplier / 1000));
                                                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/local/include/boost/date_time/time_duration.hpp:270:30: note: candidate constructor (the implicit copy constructor) not viable: no known conversion from 'float' to 'const boost::date_time::subsecond_duration<boost::posix_time::time_duration, 1000000>' for 1st argument
  class BOOST_SYMBOL_VISIBLE subsecond_duration : public base_duration
                             ^
/usr/local/include/boost/date_time/time_duration.hpp:270:30: note: candidate constructor (the implicit move constructor) not viable: no known conversion from 'float' to 'boost::date_time::subsecond_duration<boost::posix_time::time_duration, 1000000>' for 1st argument
/usr/local/include/boost/date_time/time_duration.hpp:286:59: note: candidate template ignored: disabled by 'enable_if' [with T = float]
                                typename boost::enable_if<boost::is_integral<T>, void>::type* = 0) :
                                                          ^

src/test/librbd/test_mock_Journal.cc:485:42: error: reference to '_1' is ambiguous
      std::bind(&invoke_replay_complete, _1, 0));
                                         ^
/usr/local/include/boost/bind/placeholders.hpp:46:38: note: candidate found by name lookup is 'boost::placeholders::_1'
BOOST_STATIC_CONSTEXPR boost::arg<1> _1;
                                     ^
/usr/include/c++/v1/functional:2021:21: note: candidate found by name lookup is 'std::__1::placeholders::_1'
constexpr __ph<1>   _1{};
                    ^

--- src/rbd_replay/Replayer.cc.orig	2018-02-26 21:47:18 UTC
+++ src/rbd_replay/Replayer.cc
@@ -350,7 +350,7 @@ void Replayer::wait_for_actions(const action::Dependen
     dout(DEPGRAPH_LEVEL) << "Finished waiting for " << dep.id << " after " << micros << " microseconds" << dendl;
     // Apparently the nanoseconds constructor is optional:
     // http://www.boost.org/doc/libs/1_46_0/doc/html/date_time/details.html#compile_options
-    boost::system_time sub_release_time(action_completed_time + boost::posix_time::microseconds(dep.time_delta * m_latency_multiplier / 1000));
+    boost::system_time sub_release_time(action_completed_time + boost::posix_time::microseconds(long(dep.time_delta * m_latency_multiplier / 1000)));
     if (sub_release_time > release_time) {
       release_time = sub_release_time;
     }
--- src/mon/MDSMonitor.cc.orig	2020-05-28 07:26:02.363159480 +0200
+++ src/mon/MDSMonitor.cc	2020-05-28 07:28:02.559174989 +0200
@@ -15,6 +15,7 @@
 #include <sstream>
 #include <boost/utility.hpp>
 #include <boost/regex.hpp>
+#include <boost/next_prior.hpp>
 
 #include "MDSMonitor.h"
 #include "FSCommands.h"
--- CMakeLists.txt.orig	2020-01-30 21:52:36.000000000 +0100
+++ CMakeLists.txt	2020-05-28 16:50:46.412927163 +0200
@@ -563,7 +563,7 @@
 set(BOOST_HEADER_COMPONENTS container)
 
 if(WITH_MGR)
-	list(APPEND BOOST_COMPONENTS python)
+	list(APPEND BOOST_COMPONENTS python27)
 endif()
 if(WITH_BOOST_CONTEXT)
   list(APPEND BOOST_COMPONENTS context coroutine)
--- src/CMakeLists.txt.orig	2020-01-30 21:52:36.000000000 +0100
+++ src/CMakeLists.txt	2020-05-28 20:58:47.848974172 +0200
@@ -722,7 +722,7 @@
                  $<TARGET_OBJECTS:heap_profiler_objs>)
   target_include_directories(ceph-mgr PRIVATE "${PYTHON_INCLUDE_DIRS}")
   target_link_libraries(ceph-mgr osdc client global-static common
-      Boost::python ${PYTHON_LIBRARIES} ${BLKID_LIBRARIES} ${CMAKE_DL_LIBS} ${ALLOC_LIBS})
+      Boost::python27 ${PYTHON_LIBRARIES} ${BLKID_LIBRARIES} ${CMAKE_DL_LIBS} ${ALLOC_LIBS})
   install(TARGETS ceph-mgr DESTINATION bin)
 endif (WITH_MGR)
 
--- src/test/librbd/test_mock_Journal.cc.orig	2020-01-30 21:52:36.000000000 +0100
+++ src/test/librbd/test_mock_Journal.cc	2020-05-29 06:26:16.934514447 +0200
@@ -482,7 +482,7 @@
     expect_get_max_append_size(mock_journaler, 1 << 16);
     expect_start_replay(
       mock_image_ctx, mock_journaler,
-      std::bind(&invoke_replay_complete, _1, 0));
+      std::bind(&invoke_replay_complete, std::placeholders::_1, 0));
 
     MockJournalReplay mock_journal_replay;
     expect_stop_replay(mock_journaler);
@@ -531,7 +531,7 @@
   expect_get_max_append_size(mock_journaler, 1 << 16);
   expect_start_replay(
     mock_image_ctx, mock_journaler,
-    std::bind(&invoke_replay_ready, _1));
+    std::bind(&invoke_replay_ready, std::placeholders::_1));
 
   ::journal::MockReplayEntry mock_replay_entry;
   MockJournalReplay mock_journal_replay;
@@ -540,11 +540,11 @@
   expect_try_pop_front(mock_image_ctx, mock_journaler, true, mock_replay_entry);
   expect_replay_process(mock_journal_replay);
   expect_try_pop_front(mock_image_ctx, mock_journaler, false, mock_replay_entry,
-                       std::bind(&invoke_replay_ready, _1));
+                       std::bind(&invoke_replay_ready, std::placeholders::_1));
   expect_try_pop_front(mock_image_ctx, mock_journaler, true, mock_replay_entry);
   expect_replay_process(mock_journal_replay);
   expect_try_pop_front(mock_image_ctx, mock_journaler, false, mock_replay_entry,
-                       std::bind(&invoke_replay_complete, _1, 0));
+                       std::bind(&invoke_replay_complete, std::placeholders::_1, 0));
 
   expect_stop_replay(mock_journaler);
   expect_shut_down_replay(mock_image_ctx, mock_journal_replay, 0);
@@ -601,7 +601,7 @@
   expect_get_max_append_size(mock_journaler, 1 << 16);
   expect_start_replay(
     mock_image_ctx, mock_journaler,
-    std::bind(&invoke_replay_complete, _1, -EINVAL));
+    std::bind(&invoke_replay_complete, std::placeholders::_1, -EINVAL));
 
   MockJournalReplay mock_journal_replay;
   expect_stop_replay(mock_journaler);
@@ -616,7 +616,7 @@
   expect_get_max_append_size(mock_journaler, 1 << 16);
   expect_start_replay(
     mock_image_ctx, mock_journaler,
-    std::bind(&invoke_replay_complete, _1, 0));
+    std::bind(&invoke_replay_complete, std::placeholders::_1, 0));
 
   expect_stop_replay(mock_journaler);
   expect_shut_down_replay(mock_image_ctx, mock_journal_replay, 0);
@@ -649,14 +649,14 @@
   expect_get_max_append_size(mock_journaler, 1 << 16);
   expect_start_replay(
     mock_image_ctx, mock_journaler,
-    std::bind(&invoke_replay_ready, _1));
+    std::bind(&invoke_replay_ready, std::placeholders::_1));
 
   ::journal::MockReplayEntry mock_replay_entry;
   MockJournalReplay mock_journal_replay;
   expect_try_pop_front(mock_image_ctx, mock_journaler, true, mock_replay_entry);
   expect_replay_process(mock_journal_replay);
   expect_try_pop_front(mock_image_ctx, mock_journaler, false, mock_replay_entry,
-                       std::bind(&invoke_replay_complete, _1, 0));
+                       std::bind(&invoke_replay_complete, std::placeholders::_1, 0));
   expect_stop_replay(mock_journaler);
   expect_shut_down_replay(mock_image_ctx, mock_journal_replay, -EINVAL);
   expect_flush_commit_position(mock_journaler);
@@ -669,7 +669,7 @@
   expect_get_max_append_size(mock_journaler, 1 << 16);
   expect_start_replay(
     mock_image_ctx, mock_journaler,
-    std::bind(&invoke_replay_complete, _1, 0));
+    std::bind(&invoke_replay_complete, std::placeholders::_1, 0));
 
   expect_stop_replay(mock_journaler);
   expect_shut_down_replay(mock_image_ctx, mock_journal_replay, 0);
@@ -702,7 +702,7 @@
   expect_get_max_append_size(mock_journaler, 1 << 16);
   expect_start_replay(
     mock_image_ctx, mock_journaler,
-    std::bind(&invoke_replay_ready, _1));
+    std::bind(&invoke_replay_ready, std::placeholders::_1));
 
   ::journal::MockReplayEntry mock_replay_entry;
   MockJournalReplay mock_journal_replay;
@@ -720,7 +720,7 @@
   expect_get_max_append_size(mock_journaler, 1 << 16);
   expect_start_replay(
     mock_image_ctx, mock_journaler,
-    std::bind(&invoke_replay_complete, _1, 0));
+    std::bind(&invoke_replay_complete, std::placeholders::_1, 0));
   expect_stop_replay(mock_journaler);
   expect_shut_down_replay(mock_image_ctx, mock_journal_replay, 0);
   expect_flush_commit_position(mock_journaler);
@@ -752,7 +752,7 @@
   expect_get_max_append_size(mock_journaler, 1 << 16);
   expect_start_replay(
     mock_image_ctx, mock_journaler,
-    std::bind(&invoke_replay_complete, _1, 0));
+    std::bind(&invoke_replay_complete, std::placeholders::_1, 0));
 
   MockJournalReplay mock_journal_replay;
   expect_stop_replay(mock_journaler);
@@ -786,7 +786,7 @@
 
   expect_start_replay(
     mock_image_ctx, mock_journaler,
-    std::bind(&invoke_replay_ready, _1));
+    std::bind(&invoke_replay_ready, std::placeholders::_1));
 
   ::journal::MockReplayEntry mock_replay_entry;
   MockJournalReplay mock_journal_replay;
@@ -813,7 +813,7 @@
   expect_get_max_append_size(mock_journaler, 1 << 16);
   expect_start_replay(
     mock_image_ctx, mock_journaler, {
-      std::bind(&invoke_replay_complete, _1, 0)
+      std::bind(&invoke_replay_complete, std::placeholders::_1, 0)
     });
 
   expect_stop_replay(mock_journaler);
@@ -868,14 +868,14 @@
   expect_get_max_append_size(mock_journaler, 1 << 16);
   expect_start_replay(
     mock_image_ctx, mock_journaler,
-    std::bind(&invoke_replay_ready, _1));
+    std::bind(&invoke_replay_ready, std::placeholders::_1));
 
   ::journal::MockReplayEntry mock_replay_entry;
   MockJournalReplay mock_journal_replay;
   expect_try_pop_front(mock_image_ctx, mock_journaler, true, mock_replay_entry);
   expect_replay_process(mock_journal_replay);
   expect_try_pop_front(mock_image_ctx, mock_journaler, false, mock_replay_entry,
-                       std::bind(&invoke_replay_complete, _1, 0));
+                       std::bind(&invoke_replay_complete, std::placeholders::_1, 0));
   expect_stop_replay(mock_journaler);
 
   Context *on_flush = nullptr;
@@ -892,7 +892,7 @@
   expect_get_max_append_size(mock_journaler, 1 << 16);
   expect_start_replay(
     mock_image_ctx, mock_journaler,
-    std::bind(&invoke_replay_complete, _1, 0));
+    std::bind(&invoke_replay_complete, std::placeholders::_1, 0));
 
   expect_stop_replay(mock_journaler);
   expect_shut_down_replay(mock_image_ctx, mock_journal_replay, 0);
--- src/test/lazy-omap-stats/lazy_omap_stats_test.cc.orig	2020-01-30 21:52:36.000000000 +0100
+++ src/test/lazy-omap-stats/lazy_omap_stats_test.cc	2020-05-29 08:04:42.179189658 +0200
@@ -331,7 +331,7 @@
   vector<string> tokens(tok.begin(), tok.end());
   auto it = find(tokens.begin(), tokens.end(), label);
   if (it != tokens.end()) {
-    return distance(tokens.begin(), it);
+    return std::distance(tokens.begin(), it);
   }
 
   cerr << "find_index failed to find index for " << label << endl;