rec-4.7.x: Stop using deprecated std::binary_function

diff --git a/pdns/zonemd.hh b/pdns/zonemd.hh
index 63551fec3e011df9966d88a276a400be7168dd9c..acb402d2503bf18485aead8dfe5589c1249a984d 100644 (file)
--- a/pdns/zonemd.hh
+++ b/pdns/zonemd.hh
@@ -107,7 +107,7 @@ private:
   typedef std::pair<DNSName, QType> RRSetKey_t;
   typedef std::vector<std::shared_ptr<DNSRecordContent>> RRVector_t;
 
-  struct CanonRRSetKeyCompare : public std::binary_function<RRSetKey_t, RRSetKey_t, bool>
+  struct CanonRRSetKeyCompare
   {
     bool operator()(const RRSetKey_t& a, const RRSetKey_t& b) const
     {