https://sourceforge.net/tracker/?func=detail&atid=757308&aid=1923552&group_id=143975

--- trunk/conky1/src/linux.c	2008/03/22 21:10:43	1034
+++ trunk/conky1/src/linux.c	2008/03/24 03:38:28	1042
@@ -52,6 +52,9 @@
 #include <linux/sockios.h>
 #include <net/if.h>
 #include <arpa/inet.h>
+#ifdef _NET_IF_H
+#define _LINUX_IF_H
+#endif
 #include <linux/route.h>
 #include <math.h>