nspawn: add --image= switch to boot GPT disk images that follow the Discoverable Partitions Specification

src/shared/blkid-util.h

@@ -0,0 +1,33 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifdef HAVE_BLKID
+#include <blkid/blkid.h>
+#endif
+
+#include "util.h"
+
+#ifdef HAVE_BLKID
+DEFINE_TRIVIAL_CLEANUP_FUNC(blkid_probe, blkid_free_probe);
+#define _cleanup_blkid_free_probe_ _cleanup_(blkid_free_probep)
+#endif

src/shared/gpt.h

@@ -35,6 +35,7 @@
 
 #if defined(__x86_64__)
 #  define GPT_ROOT_NATIVE GPT_ROOT_X86_64
+#  define GPT_ROOT_SECONDARY GPT_ROOT_X86
 #elif defined(__i386__)
 #  define GPT_ROOT_NATIVE GPT_ROOT_X86
 #endif