3 files changed, 16 insertions, 5 deletions
diff --git a/include/salticidae/msg.h b/include/salticidae/msg.h
index 62fc33b..594ac07 100644
--- a/include/salticidae/msg.h
+++ b/include/salticidae/msg.h
@@ -42,8 +42,8 @@ template<typename OpcodeType = uint8_t,
 class MsgBase {
     public:
     using opcode_t = OpcodeType;
-    static const opcode_t OPCODE_PING = PING;
-    static const opcode_t OPCODE_PONG = PONG;
+    static const opcode_t OPCODE_PING;
+    static const opcode_t OPCODE_PONG;
     static const size_t header_size;
 
     private:
@@ -248,6 +248,17 @@ const size_t MsgBase<OpcodeType, _, __>::header_size =
     sizeof(MsgBase<OpcodeType, _, __>) -
     sizeof(MsgBase<OpcodeType, _, __>::payload) -
     sizeof(MsgBase<OpcodeType, _, __>::no_payload);
+
+template<typename OpcodeType,
+        OpcodeType PING,
+        OpcodeType _>
+const OpcodeType MsgBase<OpcodeType, PING, _>::OPCODE_PING = PING;
+
+template<typename OpcodeType,
+        OpcodeType _,
+        OpcodeType PONG>
+const OpcodeType MsgBase<OpcodeType, _, PONG>::OPCODE_PONG = PONG;
+
 }
 
 #endif
diff --git a/include/salticidae/netaddr.h b/include/salticidae/netaddr.h
index b11f9b3..1b53dff 100644
--- a/include/salticidae/netaddr.h
+++ b/include/salticidae/netaddr.h
@@ -66,7 +66,7 @@ struct NetAddr {
         long port;
         try {
             port = std::stol(port_str.c_str());
-        } catch (std::logic_error) {
+        } catch (std::logic_error &) {
             throw SalticidaeError("invalid port format");
         }
         if (port < 0)
diff --git a/include/salticidae/util.h b/include/salticidae/util.h
index b3eb991..19d87cb 100644
--- a/include/salticidae/util.h
+++ b/include/salticidae/util.h
@@ -161,7 +161,7 @@ class Config {
             size_t idx;
             try {
                 val = stoi(strval, &idx);
-            } catch (std::invalid_argument) {
+            } catch (std::invalid_argument &) {
                 throw SalticidaeError("invalid integer");
             }
         }
@@ -175,7 +175,7 @@ class Config {
             size_t idx;
             try {
                 val = stod(strval, &idx);
-            } catch (std::invalid_argument) {
+            } catch (std::invalid_argument &) {
                 throw SalticidaeError("invalid double");
             }
         }