cachecleaner: Add cmath, needed for std::ceil and std::round

diff --git a/pdns/cachecleaner.hh b/pdns/cachecleaner.hh
index 7e47c99da21b24cdafb7889ae6209ed581b585be..1fe5a9119306aa645b80c662b3ee60af5b089110 100644 (file)
--- a/pdns/cachecleaner.hh
+++ b/pdns/cachecleaner.hh
@@ -21,6 +21,7 @@
  */
 #pragma once
 
+#include <cmath>
 #include <boost/multi_index_container.hpp>
 
 #include "dnsname.hh"