If CURLDEBUG is set we use the libcurl internal memdebug system to track
memory leaks etc.
diff --git a/ares/ares_private.h b/ares/ares_private.h
index 1bdaf30..123c96a 100644
--- a/ares/ares_private.h
+++ b/ares/ares_private.h
@@ -143,3 +143,11 @@
void ares__close_sockets(struct server_state *server);
int ares__get_hostent(FILE *fp, struct hostent **host);
int ares__read_line(FILE *fp, char **buf, int *bufsize);
+
+#ifdef CURLDEBUG
+/* This is low-level hard-hacking memory leak tracking and similar. Using the
+ libcurl lowlevel code from within library is ugly and only works when
+ c-ares is built and linked with a similarly debug-build libcurl, but we do
+ this anyway for convenience. */
+#include "../lib/memdebug.h"
+#endif
