doc: Mention vasprintf-posix module.

[gnulib.git] / m4 / pty_h.m4

diff --git a/m4/pty_h.m4 b/m4/pty_h.m4
index 4b196f7..138c892 100644 (file)
--- a/m4/pty_h.m4
+++ b/m4/pty_h.m4
@@ -1,4 +1,4 @@
-# pty_h.m4 serial 9
+# pty_h.m4 serial 10
 dnl Copyright (C) 2009, 2010 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -32,6 +32,8 @@ AC_DEFUN_ONCE([gl_PTY_H],
   dnl Check for declarations of anything we want to poison if the
   dnl corresponding gnulib module is not in use.
   gl_WARN_ON_USE_PREPARE([[
+/* <sys/types.h> is a prerequisite of <libutil.h> on FreeBSD 8.0.  */
+#include <sys/types.h>
 #if HAVE_PTY_H
 # include <pty.h>
 #endif