From 8ead7c052b1d890bc04d700093f8767d47d3b11c Mon Sep 17 00:00:00 2001
From: Tim Kientzle <kientzle@FreeBSD.org>
Date: Mon, 28 Dec 2009 02:18:26 +0000
Subject: [PATCH] Enforce this as an internal-only header.

---
 lib/libarchive/filter_fork.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/libarchive/filter_fork.h b/lib/libarchive/filter_fork.h
index d34ae22c36c1..77ff71b1534f 100644
--- a/lib/libarchive/filter_fork.h
+++ b/lib/libarchive/filter_fork.h
@@ -25,6 +25,10 @@
  * $FreeBSD$
  */
 
+#ifndef __LIBARCHIVE_BUILD
+#error This header is only to be used internally to libarchive.
+#endif
+
 #ifndef FILTER_FORK_H
 #define FILTER_FORK_H