apple: link with resolv, CoreFoundation, Security

Change-Id: I95dfb2e81308d0c727b18aae96d9b67d570cf492

CMakeLists.txt

@@ -72,6 +72,10 @@ list (APPEND dhtnet_HEADERS
 
 add_library(dhtnet ${dhtnet_SOURCES})
 target_link_libraries(dhtnet PUBLIC PkgConfig::opendht PkgConfig::pjproject fmt::fmt ${MSGPACK_LIB})
+if (APPLE)
+    target_link_libraries(dhtnet PRIVATE SYSTEM "-framework CoreFoundation" "-framework Security" "resolv")
+endif()
+
 target_include_directories(dhtnet PUBLIC
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
     $<INSTALL_INTERFACE:include>