Change at compilation time the destruction of the network devices

configure.in

 #                                               -*- Autoconf -*-
 # Process this file with autoconf to produce a configure script.
 
-AC_INIT([lxc], [0.4.0])
+AC_INIT([lxc], [0.4.1])
 
 AC_CONFIG_SRCDIR([configure.in])
 AC_CONFIG_AUX_DIR([config])
@@ -28,6 +28,11 @@ LXC_MAJOR_VERSION=$(echo $PACKAGE_VERSION | cut -d. -f1)
 LXC_MINOR_VERSION=$(echo $PACKAGE_VERSION | cut -d. -f2)
 LXC_MICRO_VERSION=$(echo $PACKAGE_VERSION | cut -d. -f3)
 
+AC_ARG_ENABLE(network_destroy, [  --disable-network-destroy  disable network destruction at exit [default=no]],, enable_network_destroy=yes)
+if test "x$enable_network_destroy" = "xyes"; then
+   CFLAGS="$CFLAGS -DNETWORK_DESTROY"
+fi
+
 AC_SUBST(LXC_MAJOR_VERSION)
 AC_SUBST(LXC_MINOR_VERSION)
 AC_SUBST(LXC_MICRO_VERSION)

src/lxc/start.c

@@ -218,8 +218,10 @@ wait_again:
 	if (lxc_setstate(name, STOPPING))
 		lxc_log_error("failed to set state %s", lxc_state2str(STOPPING));
 
+#ifdef NETWORK_DESTROY
 	if (clone_flags & CLONE_NEWNET && conf_destroy_network(name))
 		lxc_log_error("failed to destroy the network");
+#endif
 
 	err = 0;
 out:
@@ -242,8 +244,10 @@ err_state_failed:
 err_child_failed:
 err_pipe_read2:
 err_pipe_write:
+#ifdef NETWORK_DESTROY
 	if (clone_flags & CLONE_NEWNET)
 		conf_destroy_network(name);
+#endif
 err_create_network:
 err_pipe_read:
 err_waitpid_failed: