--- a/Port-linux/interface.c

+++ b/Port-linux/interface.c

@@ -43,6 +43,9 @@

 #include <linux/sockios.h>

 #include <linux/if_ether.h>

+int interface_auto_up;

+int interface_do_message;

+

 void daemon_log(int loglevel, const char *fmt,...)

 {

     char buf[255];

--- a/Port-linux/interface.h

+++ b/Port-linux/interface.h

@@ -23,8 +23,8 @@

 extern "C" {

 #endif

-int interface_auto_up;

-int interface_do_message;

+extern int interface_auto_up;

+extern int interface_do_message;

 typedef enum { IFSTATUS_UP, IFSTATUS_DOWN, IFSTATUS_ERR } interface_status_t;