suppress warnings about easch <applet>_main() having
no preceding prototype
diff --git a/coreutils/cmp.c b/coreutils/cmp.c
index 71007ea..0aebd4b 100644
--- a/coreutils/cmp.c
+++ b/coreutils/cmp.c
@@ -42,6 +42,7 @@
 #define CMP_OPT_s (1<<0)
 #define CMP_OPT_l (1<<1)
 
+int cmp_main(int argc, char **argv);
 int cmp_main(int argc, char **argv)
 {
 	FILE *fp1, *fp2, *outfile = stdout;