diff --git a/CMakeLists.txt b/CMakeLists.txt
index 037b9cb50..6a22478e9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -672,8 +672,11 @@ else()
     add_cxx_flag_if_supported(-fstack-clash-protection CXX_SECURITY_FLAGS)
   endif()
 
-  add_c_flag_if_supported(-mmitigate-rop C_SECURITY_FLAGS)
-  add_cxx_flag_if_supported(-mmitigate-rop CXX_SECURITY_FLAGS)
+  # Removed in GCC 9.1 (or before ?), but still accepted, so spams the output
+  if (NOT (CMAKE_C_COMPILER_ID STREQUAL "GNU" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 9.1))
+    add_c_flag_if_supported(-mmitigate-rop C_SECURITY_FLAGS)
+    add_cxx_flag_if_supported(-mmitigate-rop CXX_SECURITY_FLAGS)
+  endif()
 
   # linker
   if (NOT WIN32)
diff --git a/contrib/epee/include/net/net_utils_base.h b/contrib/epee/include/net/net_utils_base.h
index 50536f63b..83e6b5ab8 100644
--- a/contrib/epee/include/net/net_utils_base.h
+++ b/contrib/epee/include/net/net_utils_base.h
@@ -294,6 +294,11 @@ namespace net_utils
                                m_max_speed_up(0)
     {}
 
+    connection_context_base(const connection_context_base& a): connection_context_base()
+    {
+      set_details(a.m_connection_id, a.m_remote_address, a.m_is_income, a.m_ssl);
+    }
+
     connection_context_base& operator=(const connection_context_base& a)
     {
       set_details(a.m_connection_id, a.m_remote_address, a.m_is_income, a.m_ssl);
diff --git a/src/device/device_ledger.cpp b/src/device/device_ledger.cpp
index 200370564..eba633da8 100644
--- a/src/device/device_ledger.cpp
+++ b/src/device/device_ledger.cpp
@@ -90,6 +90,20 @@ namespace hw {
       AKout = keys.AKout;
     }
 
+    ABPkeys &ABPkeys::operator=(const ABPkeys& keys) {
+      if (&keys == this)
+        return *this;
+      Aout = keys.Aout;
+      Bout = keys.Bout;
+      is_subaddress = keys.is_subaddress;
+      is_change_address = keys.is_change_address;
+      additional_key = keys.additional_key;
+      index = keys.index;
+      Pout = keys.Pout;
+      AKout = keys.AKout;
+      return *this;
+    }
+
     bool Keymap::find(const rct::key& P, ABPkeys& keys) const {
       size_t sz = ABP.size();
       for (size_t i=0; i<sz; i++) {
diff --git a/src/device/device_ledger.hpp b/src/device/device_ledger.hpp
index d4d98ce4a..fe9028733 100644
--- a/src/device/device_ledger.hpp
+++ b/src/device/device_ledger.hpp
@@ -77,6 +77,7 @@ namespace hw {
         ABPkeys(const rct::key& A, const rct::key& B, const bool is_subaddr, bool is_subaddress, bool is_change_address, size_t index, const rct::key& P,const rct::key& AK);
         ABPkeys(const ABPkeys& keys) ;
         ABPkeys() {index=0;is_subaddress=false;is_subaddress=false;is_change_address=false;}
+        ABPkeys &operator=(const ABPkeys &keys);
     };
 
     class Keymap {
diff --git a/src/p2p/net_peerlist_boost_serialization.h b/src/p2p/net_peerlist_boost_serialization.h
index 40ef2ebcd..32f30adca 100644
--- a/src/p2p/net_peerlist_boost_serialization.h
+++ b/src/p2p/net_peerlist_boost_serialization.h
@@ -134,10 +134,11 @@ namespace boost
       a & port;
       a & length;
 
-      if (length > net::tor_address::buffer_size())
+      const size_t buffer_size = net::tor_address::buffer_size();
+      if (length > buffer_size)
         MONERO_THROW(net::error::invalid_tor_address, "Tor address too long");
 
-      char host[net::tor_address::buffer_size()] = {0};
+      char host[buffer_size] = {0};
       a.load_binary(host, length);
       host[sizeof(host) - 1] = 0;
 
@@ -155,10 +156,11 @@ namespace boost
       a & port;
       a & length;
 
-      if (length > net::i2p_address::buffer_size())
+      const size_t buffer_size = net::i2p_address::buffer_size();
+      if (length > buffer_size)
         MONERO_THROW(net::error::invalid_i2p_address, "i2p address too long");
 
-      char host[net::i2p_address::buffer_size()] = {0};
+      char host[buffer_size] = {0};
       a.load_binary(host, length);
       host[sizeof(host) - 1] = 0;