netlink: Provide MDEBUG macro

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/netlink.c b/netlink.c
index 97e1af9..f2fa273 100644 (file)
--- a/netlink.c
+++ b/netlink.c
@@ -106,6 +106,12 @@ their use.
 #include "netlink.h"
 #include "process.h"
 
+#ifdef NETLINK_DEBUG
+#define MDEBUG(...) Message(M_DEBUG, __VA_ARGS__)
+#else /* !NETLINK_DEBUG */
+#define MDEBUG(...) ((void)0)
+#endif /* !NETLINK_DEBUG */
+
 #define ICMP_TYPE_ECHO_REPLY             0
 
 #define ICMP_TYPE_UNREACHABLE            3