build: fix build failure with -fno-common

$ make CCOPTS=-fno-common
gcc ... -o ip
ld: rt_names.o (symbol from plugin): in function "rtnl_rtprot_n2a":
(.text+0x0): multiple definition of "numeric"; ip.o (symbol from plugin):(.text+0x0): first defined here

gcc ... -o tipc
ld: ../lib/libutil.a(utils.o):(.bss+0xc): multiple definition of `pretty';
tipc.o:tipc.c:28: first defined here

References: https://bugzilla.opensuse.org/1160244
Signed-off-by: Jan Engelhardt <jengelh@inai.de>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/misc/ss.c b/misc/ss.c
index 95f1d37a..1e8bca5a 100644
--- a/misc/ss.c
+++ b/misc/ss.c
@@ -35,6 +35,7 @@
 #include "libnetlink.h"
 #include "namespace.h"
 #include "SNAPSHOT.h"
+#include "rt_names.h"
 
 #include <linux/tcp.h>
 #include <linux/sock_diag.h>
@@ -121,7 +122,6 @@ static int follow_events;
 static int sctp_ino;
 static int show_tipcinfo;
 static int show_tos;
-int numeric;
 int oneline;
 
 enum col_id {