Index: m4-1.4.14/src/path.c
===================================================================
--- m4-1.4.14.orig/src/path.c
+++ m4-1.4.14/src/path.c
@@ -24,6 +24,11 @@
 
 #include "m4.h"
 
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+
 struct includes
 {
   struct includes *next;        /* next directory to search */