suppress warnings about easch <applet>_main() having
no preceding prototype
diff --git a/coreutils/hostid.c b/coreutils/hostid.c
index 65447aa..51a76c6 100644
--- a/coreutils/hostid.c
+++ b/coreutils/hostid.c
@@ -13,6 +13,7 @@
 #include <unistd.h>
 #include "busybox.h"
 
+int hostid_main(int argc, char ATTRIBUTE_UNUSED **argv);
 int hostid_main(int argc, char ATTRIBUTE_UNUSED **argv)
 {
 	if (argc > 1) {