[PATCH 1/3] command: introduce abi version

[Jean-Christophe PLAGNIOL-VILLARD]

This will allow to detect incompatibility between the env abi and the current
barebox one

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
---
 common/command.c      |    2 ++
 include/command.h     |    1 +
 include/command_abi.h |   12 ++++++++++++
 3 files changed, 15 insertions(+)
 create mode 100644 include/command_abi.h

diff --git a/common/command.c b/common/command.c
index 873b3ff..c80538c 100644
--- a/common/command.c
+++ b/common/command.c
@@ -154,6 +154,8 @@ static int init_command_list(void)
 {
 	struct command *cmdtp;
 
+	export_env_ull("command_abi_version", COMMAND_ABI_VERSION);
+
 	for (cmdtp = &__barebox_cmd_start;
 			cmdtp != &__barebox_cmd_end;
 			cmdtp++)
diff --git a/include/command.h b/include/command.h
index ffc722c..c49a014 100644
--- a/include/command.h
+++ b/include/command.h
@@ -25,6 +25,7 @@
 
 #include <linux/list.h>
 #include <linux/stringify.h>
+#include <command_abi.h>
 
 #ifndef NULL
 #define NULL	0
diff --git a/include/command_abi.h b/include/command_abi.h
new file mode 100644
index 0000000..264c003
--- /dev/null
+++ b/include/command_abi.h
@@ -0,0 +1,12 @@
+/*
+ * (C) Copyright 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
+ *
+ * Under GPL v2
+ */
+
+#ifndef __COMMAND_ABI_H__
+#define __COMMAND_ABI_H__
+
+#define COMMAND_ABI_VERSION	0
+
+#endif /* __COMMAND_ABI_H__ */
-- 
1.7.10.4