suppress warnings about easch <applet>_main() having
no preceding prototype
diff --git a/coreutils/realpath.c b/coreutils/realpath.c
index 7fac471..b3f7e49 100644
--- a/coreutils/realpath.c
+++ b/coreutils/realpath.c
@@ -12,6 +12,7 @@
 
 #include "busybox.h"
 
+int realpath_main(int argc, char **argv);
 int realpath_main(int argc, char **argv)
 {
 	int retval = EXIT_SUCCESS;