debian: define SPEED_UNKNOWN if missing in linux/ethtool.h

Debian's version of linux/ethtool.h seems to be outdated
and does not contain define SPEED_UNKNOWN, fix this by a
manual define.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/link.h b/link.h
index 67ec433..f201e8c 100644
--- a/link.h
+++ b/link.h
@@ -6,6 +6,10 @@
 #include <linux/ethtool.h>
 #include <linux/wireless.h>
 
+#ifndef SPEED_UNKNOWN
+#define SPEED_UNKNOWN           -1
+#endif
+
 #include "built_in.h"
 
 extern int wireless_sigqual(const char *ifname, struct iw_statistics *stats);