Use udns instead of c-ares

fix #3226

louloulibs/CMakeLists.txt

@@ -33,10 +33,10 @@ elseif(NOT WITHOUT_BOTAN)
   find_package(BOTAN)
 endif()
 
-if(WITH_CARES)
-  find_package(CARES REQUIRED)
-elseif(NOT WITHOUT_CARES)
-  find_package(CARES)
+if(WITH_UDNS)
+  find_package(UDNS REQUIRED)
+elseif(NOT WITHOUT_UDNS)
+  find_package(UDNS)
 endif()
 
 # To be able to include the config.h file generated by cmake
@@ -68,10 +68,10 @@ if(BOTAN_FOUND)
   set(BOTAN_INCLUDE_DIRS ${BOTAN_INCLUDE_DIRS} PARENT_SCOPE)
 endif()
 
-if(CARES_FOUND)
-  include_directories(${CARES_INCLUDE_DIRS})
-  set(CARES_FOUND ${CARES_FOUND} PARENT_SCOPE)
-  set(CARES_INCLUDE_DIRS ${CARES_INCLUDE_DIRS} PARENT_SCOPE)
+if(UDNS_FOUND)
+  include_directories(${UDNS_INCLUDE_DIRS})
+  set(UDNS_FOUND ${UDNS_FOUND} PARENT_SCOPE)
+  set(UDNS_INCLUDE_DIRS ${UDNS_INCLUDE_DIRS} PARENT_SCOPE)
 endif()
 
 set(POLLER_DOCSTRING "Choose the poller between POLL and EPOLL (Linux-only)")
@@ -118,8 +118,8 @@ target_link_libraries(network logger)
 if(BOTAN_FOUND)
   target_link_libraries(network ${BOTAN_LIBRARIES})
 endif()
-if(CARES_FOUND)
-  target_link_libraries(network ${CARES_LIBRARIES})
+if(UDNS_FOUND)
+  target_link_libraries(network ${UDNS_LIBRARIES})
 endif()
 
 #