From 396ad133315e8f298ff861b522f46b501689a621 Mon Sep 17 00:00:00 2001
From: root <root@qface.itechnolab.ru>
Date: Sat, 12 Mar 2022 06:24:36 +0300
Subject: [PATCH] Update for Ubuntu 20.04 g++ (Ubuntu 9.4.0-1ubuntu1~20.04)
 9.4.0

---
 cpp/README.txt                | 6 ++++++
 cpp/Realplexor/Event/Server.h | 4 ++--
 cpp/dklab_realplexor.cpp      | 2 ++
 cpp/utils/checked_map.h       | 2 +-
 4 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/cpp/README.txt b/cpp/README.txt
index 5044721..fd84110 100644
--- a/cpp/README.txt
+++ b/cpp/README.txt
@@ -17,6 +17,12 @@ For Ubuntu 12.04, the steps are simple:
 # apt-get install gcc libboost1.48 libev4 libev-dev libmemcached-dev
 # bash ./Make.sh
 
+Build on Ubuntu 20.04
+---------------------
+
+# apt-get install build-essential libboost1.71-all-dev libev4 libev-dev libmemcached-dev
+# bash ./Make.sh
+
 
 Build dklab_realplexor binary on other Linux versions
 -----------------------------------------------------
diff --git a/cpp/Realplexor/Event/Server.h b/cpp/Realplexor/Event/Server.h
index 49e2f79..69015f8 100644
--- a/cpp/Realplexor/Event/Server.h
+++ b/cpp/Realplexor/Event/Server.h
@@ -91,10 +91,10 @@ class Server: public ServerBase
                 lastAddr = addr;
                 events.push_back(add_listen(addr));
             }
-        } catch (runtime_error e) {
+        } catch (runtime_error& e) {
             events.clear();
             die(lastAddr + ": " + e.what());
-        } catch (exception e) {
+        } catch (exception& e) {
             events.clear();
             die(lastAddr + ": unknown exception");
         }
diff --git a/cpp/dklab_realplexor.cpp b/cpp/dklab_realplexor.cpp
index 612477a..63466e7 100644
--- a/cpp/dklab_realplexor.cpp
+++ b/cpp/dklab_realplexor.cpp
@@ -20,6 +20,8 @@
 //@ per Storage and one CONFIG, they are like singletons.
 //@
 
+#pragma GCC diagnostic ignored "-Wunused-result"
+
 #include <vector>
 #include <list>
 #include <unordered_set>
diff --git a/cpp/utils/checked_map.h b/cpp/utils/checked_map.h
index 646e2d9..b8830ed 100644
--- a/cpp/utils/checked_map.h
+++ b/cpp/utils/checked_map.h
@@ -46,7 +46,7 @@ class checked_map: public map<K, V>
     {
         try {
             return lexical_cast<T>(get(k));
-        } catch (bad_lexical_cast e) {
+        } catch (bad_lexical_cast& e) {
             throw out_of_range("Error while casting of the key " + k + " presented in " + name);
         }
     }