include headers to make prototypes visible.

gnu/dist/gkermit/gkermit.c

@@ -58,6 +58,7 @@ char *build =  "stty";
 #include <errno.h>
 #include <stdio.h>
 #include <string.h>
+#include <unistd.h>
 #include "gkermit.h"
 
 /* Forward declarations of functions used within this module... */

gnu/dist/gkermit/gunixio.c

@@ -77,6 +77,9 @@
 #include <setjmp.h>			/* Longjumps */
 #include <sys/stat.h>			/* File exist, file size */
 #include <errno.h>			/* Error symbols */
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
 #include "gkermit.h"			/* gkermit definitions */
 
 /* All versions of HP-UX need Xon/Xoff */