*: make "pragma GCC visibility push(hidden)" less ugly

diff --git a/networking/libiproute/ip_common.h b/networking/libiproute/ip_common.h
index 305b491..aef3252 100644
--- a/networking/libiproute/ip_common.h
+++ b/networking/libiproute/ip_common.h
@@ -1,6 +1,6 @@
 /* vi: set sw=4 ts=4: */
-#ifndef _IP_COMMON_H
-#define _IP_COMMON_H 1
+#ifndef IP_COMMON_H
+#define IP_COMMON_H 1
 
 #include "libbb.h"
 #include <asm/types.h>
@@ -13,9 +13,7 @@
 #include <linux/if_link.h>
 #endif
 
-#if __GNUC_PREREQ(4,1)
-# pragma GCC visibility push(hidden)
-#endif
+PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
 
 extern char **ip_parse_common_args(char **argv);
 extern int print_neigh(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg);
@@ -34,8 +32,6 @@
 extern int do_multiaddr(char **argv);
 extern int do_multiroute(char **argv);
 
-#if __GNUC_PREREQ(4,1)
-# pragma GCC visibility pop
-#endif
+POP_SAVED_FUNCTION_VISIBILITY
 
-#endif /* ip_common.h */
+#endif