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-rw-r--r--src/or/eventdns.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/or/eventdns.c b/src/or/eventdns.c
index 3144b9b0f..45f375c95 100644
--- a/src/or/eventdns.c
+++ b/src/or/eventdns.c
@@ -426,6 +426,13 @@ eventdns_set_log_fn(eventdns_debug_log_fn_type fn)
eventdns_log_fn = fn;
}
+#ifdef __GNUC__
+#define EVENTDNS_LOG_CHECK __attribute__ ((format(printf, 1, 2)))
+#else
+#define EVENTDNS_LOG_CHECK
+#endif
+
+static void _eventdns_log(const char *fmt, ...) EVENTDNS_LOG_CHECK;
static void
_eventdns_log(const char *fmt, ...)
{