add -fvisibility=hidden to CC flags, mark XXX_main functions
EXTERNALLY_VISIBLE. 5% size reduction of libbusybox.so

diff --git a/miscutils/watchdog.c b/miscutils/watchdog.c
index 14bd44f..e040c64 100644
--- a/miscutils/watchdog.c
+++ b/miscutils/watchdog.c
@@ -24,7 +24,7 @@
 	exit(0);
 }
 
-int watchdog_main(int argc, char **argv);
+int watchdog_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int watchdog_main(int argc, char **argv)
 {
 	unsigned opts;