Use intra-DSO calls when we build libbusybox. No-op for normal build.

This was Bernhard Fischer' idea.

   text    data     bss     dec     hex filename
 773549    7781    9740  791070   c121e busybox.t7/0_lib/libbusybox.so.1.11.0.svn_unstripped
 769683    7397    9740  786820   c0184 busybox.t9t/0_lib/libbusybox.so.1.11.0.svn_unstripped

1 files changed, 7 insertions, 0 deletions

diff --git a/networking/libiproute/rtm_map.h b/networking/libiproute/rtm_map.h
index cbbcc214d..02fa77e42 100644
--- a/networking/libiproute/rtm_map.h
+++ b/networking/libiproute/rtm_map.h
@@ -2,10 +2,17 @@
 #ifndef __RTM_MAP_H__
 #define __RTM_MAP_H__ 1
 
+#if __GNUC_PREREQ(4,1)
+# pragma GCC visibility push(hidden)
+#endif
+
 const char *rtnl_rtntype_n2a(int id, char *buf, int len);
 int rtnl_rtntype_a2n(int *id, char *arg);
 
 int get_rt_realms(uint32_t *realms, char *arg);
 
+#if __GNUC_PREREQ(4,1)
+# pragma GCC visibility pop
+#endif
 
 #endif /* __RTM_MAP_H__ */