From 3f2f6438fd92ef0ef97b278a53a435ed45bcf83f Mon Sep 17 00:00:00 2001
From: Matias Fontanini <matias.fontanini@gmail.com>
Date: Sun, 30 Apr 2017 19:55:23 -0700
Subject: [PATCH] Fix build issues due to std::hash missing

---
 include/tins/hw_address.h   |  4 ++++
 include/tins/ip_address.h   |  4 +---
 include/tins/ipv6_address.h |  4 +---
 src/ip_address.cpp          | 10 ++++++++++
 src/ipv6_address.cpp        |  9 +++++++++
 5 files changed, 25 insertions(+), 6 deletions(-)

diff --git a/include/tins/hw_address.h b/include/tins/hw_address.h
index 853822a..c0a24f7 100644
--- a/include/tins/hw_address.h
+++ b/include/tins/hw_address.h
@@ -35,6 +35,10 @@
 #include <string>
 #include <cstring>
 #include "cxxstd.h"
+#if TINS_IS_CXX11
+    // std::hash
+    #include <memory>
+#endif // TINS_IS_CXX11
 
 namespace Tins {
 namespace Internals {
diff --git a/include/tins/ip_address.h b/include/tins/ip_address.h
index bfbcb6c..6e5f9c5 100644
--- a/include/tins/ip_address.h
+++ b/include/tins/ip_address.h
@@ -205,9 +205,7 @@ namespace std {
 
 template<>
 struct hash<Tins::IPv4Address> {
-    size_t operator()(const Tins::IPv4Address& addr) const {
-        return std::hash<uint32_t>()(addr);
-    }
+    size_t operator()(const Tins::IPv4Address& addr) const;
 };
 
 } // std
diff --git a/include/tins/ipv6_address.h b/include/tins/ipv6_address.h
index fcec9b3..6013635 100644
--- a/include/tins/ipv6_address.h
+++ b/include/tins/ipv6_address.h
@@ -223,9 +223,7 @@ namespace std {
 
 template<>
 struct hash<Tins::IPv6Address> {
-    size_t operator()(const Tins::IPv6Address& addr) const {
-        return std::hash<std::string>()(addr.to_string());
-    }
+    size_t operator()(const Tins::IPv6Address& addr) const;
 };
 
 } // std
diff --git a/src/ip_address.cpp b/src/ip_address.cpp
index 740ab4c..fa35b2c 100644
--- a/src/ip_address.cpp
+++ b/src/ip_address.cpp
@@ -33,6 +33,10 @@
     #include <sys/socket.h>
     #include <arpa/inet.h>
 #endif // _WIN32
+#if TINS_IS_CXX11
+    // std::hash
+    #include <memory>
+#endif // TINS_IS_CXX11
 #include <stdexcept>
 #include <sstream>
 #include <iostream>
@@ -41,6 +45,7 @@
 #include "address_range.h"
 #include "exceptions.h"
 
+
 using std::string;
 using std::ostringstream;
 using std::ostream;
@@ -150,3 +155,8 @@ IPv4Address IPv4Address::operator&(const IPv4Address& mask) const {
 }
 
 } // Tins
+
+// Hash
+size_t std::hash<Tins::IPv4Address>::operator()(const Tins::IPv4Address& addr) const {
+    return std::hash<uint32_t>()(addr);
+}
diff --git a/src/ipv6_address.cpp b/src/ipv6_address.cpp
index dfb7291..31a2474 100644
--- a/src/ipv6_address.cpp
+++ b/src/ipv6_address.cpp
@@ -37,6 +37,10 @@
     #include <ws2tcpip.h>
     #include <mstcpip.h>
 #endif
+#if TINS_IS_CXX11
+    // std::hash
+    #include <memory>
+#endif // TINS_IS_CXX11
 #include <limits>
 #include <sstream>
 #include <iostream>
@@ -148,3 +152,8 @@ IPv6Address operator&(const IPv6Address& lhs, const IPv6Address& rhs) {
 }
 
 } // Tins
+
+// Hash
+size_t std::hash<Tins::IPv6Address>::operator()(const Tins::IPv6Address& addr) const {
+    return std::hash<string>()(addr.to_string());
+}