Add extern to *_main global variable declarations in header files.

[vpp.git] / src / vnet / gre / gre.h

diff --git a/src/vnet/gre/gre.h b/src/vnet/gre/gre.h
index ad3e025..9c12eb4 100644 (file)
--- a/src/vnet/gre/gre.h
+++ b/src/vnet/gre/gre.h
@@ -195,7 +195,7 @@ gre_get_protocol_info (gre_main_t * em, gre_protocol_t protocol)
   return p ? vec_elt_at_index (em->protocol_infos, p[0]) : 0;
 }
 
-gre_main_t gre_main;
+extern gre_main_t gre_main;
 
 /* Register given node index to take input for given gre type. */
 void