added HAVE_UNISTD_H

diff --git a/config.h.in b/config.h.in
index 5de04cf..2102282 100644 (file)
--- a/config.h.in
+++ b/config.h.in
@@ -32,6 +32,9 @@
 /* Define if you have the time.h header file */
 #undef HAVE_TIME_H
 
+/* Define if you have the unistd.h header file */
+#undef HAVE_UNISTD_H
+
 /* Define if you have the lrand48 function.  */
 #undef HAVE_LRAND48