autoconf: Check for adns_if_monotonic and define USE_MONOTONIC

[secnet.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 471a6e77db56f726b675cdad6114732c200a4109..53810e4a53eb1cbfae521db0edf8de898974b31c 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -137,6 +137,14 @@ else
     AC_MSG_WARN([Disabling IPv6 support])
 fi
 
+AC_CHECK_DECL([adns_if_monotonic],[
+    AC_DEFINE([USE_MONOTONIC],[1],[Use CLOCK_MONOTONIC and adns_if_monotonic])
+],[
+    AC_MSG_WARN([Using non-monotonic clock, due to lack of adns_if_monotonic])
+],[AC_INCLUDES_DEFAULT
+#include <adns.h>
+])
+
 SUBDIRMK_MAKEFILES(common.make)
 
 AC_OUTPUT(,