From 5ea138dc4b9822095723b75bc2962e3d899f5437 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludovic=20Court=C3=A8s?= <ludo@gnu.org>
Date: Mon, 18 Feb 2013 23:05:39 +0100
Subject: [PATCH] Enable chroot support on old glibc versions.

---
 src/libstore/build.cc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index d9a7f3109..f583d6857 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -43,6 +43,12 @@
 #include <sched.h>
 #endif
 
+/* In GNU libc 2.11, <sys/mount.h> does not define `MS_PRIVATE', but
+   <linux/fs.h> does.  */
+#if !defined MS_PRIVATE && defined HAVE_LINUX_FS_H
+#include <linux/fs.h>
+#endif
+
 #define CHROOT_ENABLED HAVE_CHROOT && HAVE_UNSHARE && HAVE_SYS_MOUNT_H && defined(MS_BIND) && defined(MS_PRIVATE) && defined(CLONE_NEWNS)
 
 #if CHROOT_ENABLED