From f6d3995d6bf3bc7bd94e9aefe10e81a145c8b564 Mon Sep 17 00:00:00 2001
From: Thomas Ferreira de Lima <tlima@princeton.edu>
Date: Wed, 1 Aug 2018 14:56:58 -0400
Subject: [PATCH] changing ext/hash_(set|map) to unordered_(set|map) to avoid
 deprecation warning on mac.

---
 src/db/db/dbHash.h | 33 ++++++++++++++++++++++-----------
 1 file changed, 22 insertions(+), 11 deletions(-)

diff --git a/src/db/db/dbHash.h b/src/db/db/dbHash.h
index 4422dc45b..6a39a9cb5 100644
--- a/src/db/db/dbHash.h
+++ b/src/db/db/dbHash.h
@@ -23,17 +23,21 @@
 
 #ifndef HDR_dbHash
 #define HDR_dbHash
-
-#if defined(__GNUC__)
-#   include <ext/hash_map>
-#   include <ext/hash_set>
-namespace std_ext = __gnu_cxx;
-#  define DB_HASH_NAMESPACE __gnu_cxx
-#else
-#   include <hash_map>
-#   include <hash_set>
+#if defined(__APPLE__) // clang compiler complains about deprecation warning on ext/hash_map and ext/hash_set
+#    include <unordered_map> 
+#    include <unordered_set>
+#    define DB_HASH_NAMESPACE std
 namespace std_ext = std;
-#  define DB_HASH_NAMESPACE std
+#elif defined(__GNUC__)
+#    include <ext/hash_map>
+#    include <ext/hash_set>
+namespace std_ext = __gnu_cxx;
+#    define DB_HASH_NAMESPACE __gnu_cxx
+#else
+#    include <hash_map>
+#    include <hash_set>
+namespace std_ext = std;
+#    define DB_HASH_NAMESPACE std
 #endif
 
 #include "dbPoint.h"
@@ -74,7 +78,7 @@ namespace DB_HASH_NAMESPACE
   };
 #endif
 
-#if defined(_WIN64) || defined(__APPLE__)
+#if defined(_WIN64)
   /**
    *  @brief Specialization missing for long long on WIN64
    */
@@ -100,6 +104,13 @@ namespace DB_HASH_NAMESPACE
   };
 #endif
 
+#if defined(__APPLE__)
+  template<typename _Key, typename _Tp>
+  using hash_map = unordered_map<_Key, _Tp>;
+  template<typename _Value>
+  using hash_set = unordered_set<_Value>;
+#endif
+
   template <class T>
   inline size_t hfunc (const T &t)
   {