[PATCH 3/8] add noshell support

[Sascha Hauer]

Some scenarios like initial bootloaders do not need interactive shell
support, so make this optional. Without a shell a board must provide
its own run_shell function.

Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
 common/Kconfig |   13 ++++++++++++-
 1 files changed, 12 insertions(+), 1 deletions(-)

diff --git a/common/Kconfig b/common/Kconfig
index 83975ee..c3449a9 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -37,6 +37,9 @@ config BLOCK
 config BLOCK_WRITE
 	bool
 
+config HAVE_NOSHELL
+	bool
+
 menu "General Settings              "
 
 config LOCALVERSION_AUTO
@@ -234,6 +237,14 @@ choice
 		select COMMAND_SUPPORT
 		help
 		  simple shell. No if/then, no return values from commands, no loops
+
+	config SHELL_NONE
+		depends on HAVE_NOSHELL
+		bool "no shell (noninteractive build)"
+		help
+		  No shell at all. This means no shell is started and your board has
+		  to provide a run_shell() function which is started at the end of
+		  the barebox startup process.
 endchoice
 
 config GLOB
@@ -402,7 +413,7 @@ config DEFAULT_ENVIRONMENT
 config DEFAULT_ENVIRONMENT_GENERIC
 	bool
 	depends on DEFAULT_ENVIRONMENT
-	select SHELL_HUSH
+	depends on SHELL_HUSH
 	select HUSH_GETOPT
 	select CMD_CRC
 	select CMD_CRC_CMP
-- 
1.7.2.3