From f097141b65b2ac27b3ce4b539c3c5ce2f67ea85c Mon Sep 17 00:00:00 2001
From: Charles-Henri Bruyand <charles-henri.bruyand@open-xchange.com>
Date: Tue, 27 Mar 2018 13:42:52 +0200
Subject: [PATCH] rec: fallback to std::set when boost::container::flat_set is
 not available (boost version < 1.48)

---
 pdns/pdns_recursor.cc          | 7 ++++++-
 pdns/recursordist/configure.ac | 4 ++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/pdns/pdns_recursor.cc b/pdns/pdns_recursor.cc
index d148546e33..302d2863bf 100644
--- a/pdns/pdns_recursor.cc
+++ b/pdns/pdns_recursor.cc
@@ -26,8 +26,9 @@
 #include <netdb.h>
 #include <sys/stat.h>
 #include <unistd.h>
-
+#ifdef HAVE_BOOST_CONTAINER_FLAT_SET_HPP
 #include <boost/container/flat_set.hpp>
+#endif
 #include "ws-recursor.hh"
 #include <pthread.h>
 #include "recpacketcache.hh"
@@ -161,7 +162,11 @@ static bool g_gettagNeedsEDNSOptions{false};
 static time_t g_statisticsInterval;
 static bool g_useIncomingECS;
 std::atomic<uint32_t> g_maxCacheEntries, g_maxPacketCacheEntries;
+#ifdef HAVE_BOOST_CONTAINER_FLAT_SET_HPP
 static boost::container::flat_set<uint16_t> s_avoidUdpSourcePorts;
+#else
+static std::set<uint16_t> s_avoidUdpSourcePorts;
+#endif
 static uint16_t s_minUdpSourcePort;
 static uint16_t s_maxUdpSourcePort;
 
diff --git a/pdns/recursordist/configure.ac b/pdns/recursordist/configure.ac
index cc489370c1..5fd6249271 100644
--- a/pdns/recursordist/configure.ac
+++ b/pdns/recursordist/configure.ac
@@ -90,6 +90,10 @@ AS_IF([test "x$PROTOBUF_LIBS" != "x" -a x"$PROTOC" != "x"],
 )
 
 BOOST_REQUIRE([$boost_required_version])
+
+# Check against flat_set header that requires boost >= 1.48
+BOOST_FIND_HEADER([boost/container/flat_set.hpp])
+
 PDNS_SELECT_CONTEXT_IMPL
 
 PDNS_ENABLE_UNIT_TESTS
-- 
2.47.2