1 files changed, 10 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3a035bb..17e5a0c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -378,6 +378,16 @@ if(HAVE_NETINET_IP_H)
         add_definitions(-DHAVE_NETINET_IP_H)
 endif()
 
+check_include_files(resolv.h HAVE_RESOLV_H)
+if(HAVE_RESOLV_H)
+        add_definitions(-DHAVE_RESOLV_H)
+endif()
+
+check_include_files(arpa/nameser.h HAVE_ARPA_NAMESER_H)
+if(HAVE_ARPA_NAMESER_H)
+        add_definitions(-DHAVE_ARPA_NAMESER_H)
+endif()
+
 # This isn't ready for universal binaries yet, since we do conditional
 # compilation based on the architecture, but this makes cross compiling for a
 # single architecture work on macOS at least.