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/udhcp/dhcpc.h b/networking/udhcp/dhcpc.h
index c8acd4982..452afcf45 100644
--- a/networking/udhcp/dhcpc.h
+++ b/networking/udhcp/dhcpc.h
@@ -4,6 +4,10 @@
 #ifndef _DHCPC_H
 #define _DHCPC_H
 
+#if __GNUC_PREREQ(4,1)
+# pragma GCC visibility push(hidden)
+#endif
+
 #define INIT_SELECTING  0
 #define REQUESTING      1
 #define BOUND           2
@@ -60,5 +64,8 @@ int send_renew(uint32_t xid, uint32_t server, uint32_t ciaddr);
 int send_release(uint32_t server, uint32_t ciaddr);
 int get_raw_packet(struct dhcpMessage *payload, int fd);
 
+#if __GNUC_PREREQ(4,1)
+# pragma GCC visibility pop
+#endif
 
 #endif